Abstract
A total of 131 phlebotomine Algerian sandflies have been processed in the present study. They belong to the species Phlebotomus bergeroti, Phlebotomus alexandri, Phlebotomus sergenti, Phlebotomus chabaudi, Phlebotomus riouxi, Phlebotomus perniciosus, Phlebotomus longicuspis, Phlebotomus perfiliewi, Phlebotomus ariasi, Phlebotomus chadlii, Sergentomyia fallax, Sergentomyia minuta, Sergentomyia antennata, Sergentomyia schwetzi, Sergentomyia clydei, Sergentomyia christophersi and Grassomyia dreyfussi. They have been characterised by sequencing of a part of the cytochrome b (cyt b), t RNA serine and NADH1 on the one hand and of the cytochrome C oxidase I of the mitochondrial DNA (mtDNA) on the other hand. Our study highlights two sympatric populations within P. sergenti in the area of its type-locality and new haplotypes of P. perniciosus and P. longicuspis without recording the specimens called lcx previously found in North Africa. We tried to use a polymerase chain reaction-restriction fragment length polymorphism method based on a combined double digestion of each marker. These method is not interesting to identify sandflies all over the Mediterranean Basin.
Algeria; mtDNA; PCR-RFLP; Phlebotomus sergenti
Algeria is a country where four leishmaniases are endemic. The leishmaniasis due to Leishmania infantum is transmitted by phlebotomine sandflies belonging to the subgenus Larroussius: Phlebotomus perniciosus, Phlebotomus perfiliewi [proven vectors according to Killick-Kendrick (1990)Killick-Kendrick R 1990. Phlebotomine vectors of the leishmaniases: a review. Med Vet Entomol 4: 1-24.] and possibly Phlebotomus longicuspis (suspected vector) (Izri et al. 1990Izri MA, Belazzoug S, Boudjebla Y, Dereure J, Pratlong S, Delalbre-Belmonte A, Rioux JA 1990. Leishmania infantum MON-1 isolé chez Phlebotomus perniciosus en Kabylie (Algérie). Ann Parasitol Hum Comp 65: 151-152., Izri & Belazzoug 1993Izri MA, Belazzoug S 1993. Phlebotomus (Larroussius) perfiliewi naturally infected with dermotropic Leishmania infantum at Tenes, Algeria. Trans R Soc Trop Med Hyg 87: 399., Harrat et al. 1996Harrat Z, Pratlong F, Belazzoug S, Dereure J, Deniau M, Rioux JA, Belkaid M, Dedet JP 1996. Leishmania infantum and L. major in Algeria. Trans R Soc Trop Med Hyg 90: 625-629., Berdjane-Brouk et al. 2012Berdjane-Brouk Z, Charrel RN, Hamrioui B, Izri A 2012. First detection of Leishmania infantum DNA in Phlebotomus longicuspis Nitzulescu, 1930 from visceral leishmaniasis endemic focus in Algeria. Parasitol Res 111: 419-422.). Leishmania major is transmitted by the proven vector Phlebotomus papatasi (Izri et al. 1992Izri MA, Belazzoug S, Pratlong F, Rioux JA 1992. Isolement de Leishmania major chez Phlebotomus papatasi à Biskra (Algérie). Fin d’une épopée écoépidémiologique. Ann Parasitol Hum Comp 67: 31-32.). Leishmania tropica and Leishmania killicki are transmitted by the proven vectors Phlebotomus sergenti (Guilvard et al. 1991Guilvard E, Rioux JA, Gallego M, Pratlong F, Mahjour J, Martinez-Ortega E, Dereure J, Saddiki A, Martini A 1991. Leishmania tropica au Maroc. III. Rôle vecteur de Phlebotomus sergenti. A propos de 89 isolats. Ann Parasitol Hum Comp 66: 96-99., Boubidi et al. 2011Boubidi S, Benallal K, Boudrissa A, Bouiba L, Bouchareb B, Garni R, Bouratbine A, Ravel C, Dvorak V, Votypka J, Volf P, Harrat Z 2011. Phlebotomus sergenti (Parrot, 1917) identified as Leishmania killicki host in Ghardaïa, south Algeria. Microbes Infect 13: 691-696., Jaouadi et al. 2012Jaouadi K, Depaquit J, Haouas N, Chaara D, Gorcii M, Chargui N, Dedet JP, Pratlong F, Boubabous R, Babba H 2012. Twenty-four new human cases of cutaneous leishmaniasis due to Leishmania killicki in Metlaoui, southwestern Tunisia. Probable role of Phlebotomus sergenti in the transmission. Acta Trop 122: 276-283.).
The phlebotomine sandfly fauna of Algeria has been studied in the past (Parrot 1917Parrot L 1917. Sur un nouveau phlébotome algérien Phlebotomus sergenti, sp. nov. Bull Soc Pathol Exot 10: 564-567., 1935Parrot L 1935. Les espèces algériennes du genre Phlebotomus (Psychodidae). Bull Soc Hist Nat Afr Nord 26: 145-149., 1942Parrot L 1942. Notes sur les phlébotomes. XXXIX - à propos de deux Prophlebotomus d’Algérie: Phlebotomus minutus var. Signatipennis et Phlebotomus fallax. Arch Inst Pasteur Alger 20: 322-335., Rioux et al. 1970aRioux JA, Croset H, Guy Y 1970a. Présence de Phlebotomus (Paraphlebotomus) chabaudi Croset, Abonnenc et Rioux, 1970 en Algérie. Ann Parasitol Hum Comp 45: 875-880., bRioux JA, Guy Y, Le Corroller Y, Croset H, Addadi K 1970b. Présence en Algérie de Phlebotomus (Larroussius) chadlii Rioux, Juminer et Gibily, 1966. Bull Soc Pathol Exot 63: 101-104., Dedet et al. 1973Dedet JP, Addadi K, Tabet-Derraz O 1973. Epidémiologie des leishmanioses en Algérie 1. captures de phlébotomes (Diptera, Psychodidae) à Biskra. Présence de Sergentomyia christophersi (Sinton, 1927) en Algérie. Arch Inst Pasteur Alger 51: 183-194., 1984Dedet JP, Belazzoug S, Addadi K 1984. Les phlébotomes (Diptera, Psychodidae) d’Algérie. Cah Orstom (Sci Hum) 22: 99-127., Dedet & Addadi 1977Dedet JP, Addadi K 1977. Epidémiologie des leishmanioses en Algérie. 4. Les phlébotomes (Diptera, Psychodidae) des Aurès. Arch Inst Pasteur Alger 52: 85-94., Belazzoug & Mahzoul 1980Belazzoug S, Mahzoul D 1980. Note sur les phlébotomes (Diptera, Psychodidae) du Tassili N’ajjer. Arch Inst Pasteur Alger 54: 103-106., 1986Belazzoug S, Mahzoul D 1986. Note sur les phlébotomes (Diptera, Psychodidae) du Hoggar. Arch Inst Pasteur Alger 55: 113-116., Belazzoug et al. 1986Belazzoug S, Mahzoul D, Rioux JA 1986. Les phlébotomes (Diptera, Psychodidae) de M’Sila et Bousaada. Arch Inst Pasteur Alger 55: 117-124., Berchi et al. 1986Berchi S, Rioux JA, Belmonte A, Russo J 1986. Un phlébotome nouveau pour l’Algérie: Phlebotomus (Paraphlebotomus) kazeruni. Ann Parasitol Hum Comp 61: 507-508., Belazzoug 1991Belazzoug S 1991. The sand flies of Algeria. Parassitologia 33 (Suppl.): 85-87., Russo et al. 1991Russo J, Rioux JA, Lambert M, Rispail P, Belmonte A, Berchi S 1991. Chorologie des phlébotomes de l’est algérien (Diptera, Phlebotominae). Ann Parasitol Hum Comp 66: 247-251.). Recently, two molecular studies characterised two closely related species (Phlebotomus chabaudi and Phlebotomus riouxi) having undistinguishable or very difficultly distinguishable females from North Africa (Bounamous et al. 2008Bounamous A, Boudabous R, Jouet D, Augot D, Ferté H, Babba H, Berchi S, Depaquit J 2008. Caractérisation moléculaire et morphologique de deux espèces affines de Paraphlebotomus: Phlebotomus chabaudi Croset, Abonnenc and Rioux, 1970 et P. riouxi Depaquit, Killick-Kendrick, Léger, 1998 (Diptera, Psychodidae). Parasite 15: 565-571., Boudabous et al. 2009Boudabous R, Bounamous A, Jouet D, Depaquit J, Augot D, Ferté H, Berchi S, Veuille M, Babba H 2009. Mitochondrial DNA differentiation between two closely related species Phlebotomus chabaudi Croset, Abonnenc & Rioux, 1970 and P. riouxi Depaquit, Killick-Kendrick & Léger, 1998 based on direct sequencing and PCR-RFLP. Ann Entomol Soc Am 102: 347-353.) and a new species for the country (and for Africa) has been recorded: Phlebotomus mascittii Grassi (Berdjane-Brouk et al. 2011Berdjane-Brouk Z, Charrel RN, Bitam I, Hamrioui B, Izri A 2011. Record of Phlebotomus (Transphlebotomus) mascittii Grassi, 1908 and Phlebotomus (Larroussius) chadlii Rioux, Juminer & Gibily, 1966 female in Algeria. Parasite 18: 337-339.).
In a recent paper, Latrofa et al. (2012)Latrofa MS, Annoscia G, Dantas-Torres F, Traversa D, Otranto D 2012. Towards a rapid molecular identification of the common phlebotomine sand flies in the Mediterranean Region. Vet Parasitol 184: 267-270. suggested to use mitochondrial DNA (mtDNA) cytochrome b (cyt b) polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) as a rapid molecular identification of the common phlebotomine sandflies in the Mediterranean Region. The goal of this paper is to check the proposed method on a sampling of 17 Algerian species (131 specimens) belonging to three genera: Phlebotomus, Sergentomyia and Grassomyia. We coupled cyt b and cytochrome C oxidase I (COI) of the mtDNA. The first marker is considered as the “gold standard” for phlebotomine sandflies systematic. The second one serves as a DNA barcode for the identification of animal species (Hebert et al. 2003Hebert PDN, Cywinska A, Ball SL, de Waard JR 2003. Biological identifications through DNA barcodes. Proc R Soc Lond B Biol Sci 270: 313-321.). However, it was used in a few studies carried out on phlebotomine sandflies to study taxa from the Americas (Arrivillaga et al. 2002Arrivillaga JC, Norris DE, Feliciangeli MD, Lanzaro GC 2002. Phylogeography of the neotropical sand fly Lutzomyia longipalpis inferred from mitochondrial DNA sequences. Infect Genet Evol 2: 83-95., Azpurua et al. 2010Azpurua J, de La Cruz D, Valderama A, Windsor D 2010. Lutzomyia sand fly diversity and rates of infection by Wolbachia and an exotic Leishmania species on Barro Colorado Island, Panama. PLoS Negl Trop Dis 4: e627.), from North Africa (Boudabous et al. 2009Boudabous R, Bounamous A, Jouet D, Depaquit J, Augot D, Ferté H, Berchi S, Veuille M, Babba H 2009. Mitochondrial DNA differentiation between two closely related species Phlebotomus chabaudi Croset, Abonnenc & Rioux, 1970 and P. riouxi Depaquit, Killick-Kendrick & Léger, 1998 based on direct sequencing and PCR-RFLP. Ann Entomol Soc Am 102: 347-353.) and in India (Kumar et al. 2012Kumar NP, Srinivasan R, Jambulingam P 2012. DNA barcoding for identification of sand flies (Diptera: Psychodidae) in India. Mol Ecol Resour 12: 414-420.).
MATERIALS AND METHODS
Sandflies collection - Sandflies were collected from different provinces of Algeria coupling three methods in order to increase the diversity (Rioux et al. 2013Rioux JA, Carron S, Dereure J, Périères J, Zeraia L, Franquet E, Babinot M, Gállego M, Prudhomme J 2013. Ecology of leishmaniasis in the South of France. 22. Reliability and representativeness of 12 Phlebotomus ariasi, P. perniciosus and Sergentomyia minuta (Diptera: Psychodidae) sampling stations in Vallespir (eastern French Pyrenees Region). Parasite 20: 34.): sticky traps, CDC and ultraviolet miniature light traps and aspirators (Fig. 1). They were stored in 96% ethanol. One hundred thirty-one males and females selected for this study are indicated in the Supplementary data.
: sampling realised for this study in different areas of Algeria. Aïn-Touta is the type locality of Phlebotomus sergenti. Circles: main cities; stars: locations where sandflies have been caught.
Sandflies mounting and identification - The head and genitalia of individual male sandflies were cut off within a drop of ethanol, cleared in boiling Marc-André solution and mounted between slide and cover slide for species identification. The body related to the specimen was stored dried in a vial at -20ºC before DNA extraction.
The specimens have been identified by observation of the head and genitalia under a BX50 microscope. The identification keys and characters used for the identification of specimens are those of Abonnenc (1972)Abonnenc E 1972. Les phlébotomes de la région éthiopienne (Diptera, Psychodidae). Cah Orstom (Sci Hum) 55: 1-239., Dedet et al. (1984)Dedet JP, Belazzoug S, Addadi K 1984. Les phlébotomes (Diptera, Psychodidae) d’Algérie. Cah Orstom (Sci Hum) 22: 99-127., Depaquit et al. (1998a)Depaquit J, Léger N, Killick-Kendrick R 1998a. Description de Phlebotomus (Paraphlebotomus) riouxi n. sp. d’Afrique du Nord. Parasite 5: 151-158., Pesson et al. (2004)Pesson B, Ready JS, Benabdennbi I, Martín-Sánchez J, Esseghir S, Cadi-Soussi M, Morillas-Marquez F, Ready PD 2004. Sand flies of the Phlebotomus perniciosus complex: mitochondrial introgression and a new sibling species of P. longicuspis in the Moroccan Rif. Med Vet Entomol 18: 25-37. and Bounamous et al. (2008)Bounamous A, Boudabous R, Jouet D, Augot D, Ferté H, Babba H, Berchi S, Depaquit J 2008. Caractérisation moléculaire et morphologique de deux espèces affines de Paraphlebotomus: Phlebotomus chabaudi Croset, Abonnenc and Rioux, 1970 et P. riouxi Depaquit, Killick-Kendrick, Léger, 1998 (Diptera, Psychodidae). Parasite 15: 565-571.. Measures and photos have been performed using the Perfect Image software (Aries Company, Chatillon, France) and a video camera connected to the microscope.
DNA extraction - Genomic DNA was extracted from the thorax, wings, legs and abdomen of individual sandflies using the QIAmp DNA Mini Kit (Qiagen, Germany) following the manufacturer’s instructions, modified by crushing the sandfly tissues with a piston pellet (Treff, Switzerland) and using an elution volume of 200 µL, as detailed in Depaquit et al. (2004)Depaquit J, Léger N, Robert V 2004. Description du mâle et redescription de la femelle de Phlebotomus (Anaphlebotomus) berentiensis (Léger & Rodhain, 1978). Parasite 11: 201-209..
PCR amplification and sequencing - All the mtDNA amplifications were performed in a 50 µL volume using 5 µL of extracted DNA solution and 50 pmol of each of the primers. The PCR mix contained (final concentrations) 10 mM Tris HCl (pH 8.3), 1.5 mM MgCl2, 50 mM KCl, 0.01% Triton X 100, 200 µM deoxynucleotide triphosphate each base and 1.25 units of 5 prime Taq polymerase (Eppendorf, Germany).
The cycle profiles were marker dependent. Each PCR begins by an initial denaturation step at 94ºC for 3 min and finishes by a final extension at 68ºC for 1 min. Amplification of a fragment of cyt b gene has been done by using the primers N1N-PDR and C3B-PDR, following the method previously published by Esseghir et al. (1997)Esseghir S, Ready PD, Killick-Kendrick R, Ben-Ismail R 1997. Mitochondrial haplotypes and geographical variance of Phlebotomus vectors of Leishmania major. Insect Mol Biol 6: 211-255.: five cycles (denaturation at 94ºC for 30 s, annealing at 40ºC for 60 s and extension at 68ºC for 60 s) followed by 35 cycles (denaturation at 94ºC for 60 s, annealing at 44ºC for 60 s and extension at 68ºC for 60 s). Their COI domain was amplified using the primers used by Hajibabaei et al. (2006)Hajibabaei M, Janzen DH, Burns JM, Hallwachs W, Hebert PDN 2006. DNA barcodes distinguish species of tropical Lepidoptera. PNAS 103: 968-971.: LepF and LepR, under the following thermal profile (Costa et al. 2007Costa FO, Dewaard JR, Boutillier J, Ratnasingham S, Dooh RT, Hajibabaei M, Hebert PDN 2007. Biological identifications through DNA barcodes: the case of the Crustacea. Can J Fish Aquat Sci 64: 272-295.): five cycles (denaturation at 94ºC for 30 s, annealing at 45ºC for 90 s and extension at 68ºC for 60 s), then 35 cycles (denaturation at 94ºC for 30 s, annealing at 51ºC for 90 s and extension at 68ºC for 60 s).
Amplicons were analysed by electrophoresis in 1.5% agarose gel containing ethidium bromide. Direct sequencing in both directions was performed by Sanger’s method using the primers used for DNA amplification. Reagents for PCR cleanup were Agencourt® AMPure XP-PCR Purification and those for sequencing reaction were Big Dye Sequencing Buffer (Applied Biosystems Foster City, California, USA); Agencourt® CleanSEQ kit: CleanSeq® beads. The instruments used for the sequencing were Biomek NXp BiomekFXP (Bekman Coulter); Sequencer 3730 XLT (Applied Biosystems). The correction of sequences was done using Pregap and Gap softwares included in the Staden Package (Bonfield & Staden 1996Bonfield JK, Staden R 1996. Experiment files and their application during large-scale sequencing projects. DNA Seq 6: 109-117.).
Molecular analyses - They are based on the two datasets of sequences. Analyses were performed using haplotypes obtained from this study and sequences of P. chabaudi and P. riouxi available in GenBank (Supplementary data). Sequence alignment was performed using the CLUSTALW routine included in the MEGA v.4 software (Tamura et al. 2007Tamura K, Dudley J, Nei M, Kumar S 2007. MEGA4: Molecular Evolutionary Genetics Analysis (MEGA) software version 4.0. Mol Biol Evol 24: 1596-1599.) and checked by eye. The objective of this study is to provide a database for sandflies identification, not to do any phylogenetical analysis. Consequently, a neighbour-joining (NJ) analysis was performed using MEGA 4 software, with the Kimura-2 parameters model and using uniform rates among sites. Gaps were treated as missing data.
RFLP - The diagnostic endonuclease restriction sites on cyt b and COI mtDNA sequences were predicted for each specimen using CLC workbench 5.2 software (clc-genomics-workbench.com-about.com). A panel of restriction enzymes was tested including AseI enzyme proposed by Latrofa et al. (2012)Latrofa MS, Annoscia G, Dantas-Torres F, Traversa D, Otranto D 2012. Towards a rapid molecular identification of the common phlebotomine sand flies in the Mediterranean Region. Vet Parasitol 184: 267-270. for cyt b digestion. Because one restriction enzyme cannot provide an original digestion pattern per species, we selected double digestion for both molecular markers.
PCR-RFLP assays were performed in a 50-μL total volume reaction mix, containing 15 μL of PCR product (from PCR vials), 0.1 μL of AseI, 0.4 µL of MnlI for cytb and 0.05 µL of MspI, 0.05 µL of TaqI for COI, 5 μL of NEB buffer 3 for cyt b and 5 μL of NEB buffer 4 for COI containing bovine serum albumin (New England Biolabs, France).
For cyt b PCR-RFLP, we selected a double digestion coupling AseI with MnlI. PCR products were digested during 2 h at 37ºC.
For COI PCR-RFLP, we selected a double digestion coupling MspI with TaqI. According to their different temperature of activity (37ºC and 65ºC, respectively), PCR products were digested during 1 h at 37ºC then 1 h at 65ºC.
The digested samples were separated by electrophoresis in a 3% agarose gel to produce DNA fragments and sized by comparison with markers 50 bp ladder, 100 bp ladder and 20 bp ladder (Cliniscience, France).
According to the sequencing of all the specimens processed in the present study, we did not use any positive control, but we checked that each restriction enzyme had functioned properly in each reaction by comparison to the predicted digestion.
RESULTS
PCR amplification was successful for all the specimens processed. The GenBank accessions for COI and cyt b are indicated in the Supplementary data. The length of the analysed markers is of 680 bp for COI. It varies from 510-525 bp for cyt b. Each gene from each haplotype had an open reading frame (ORF). The sequences labelled COI include exclusively this marker. The sequences labelled “cytB” included in fact an ORF of cytB (positions 1-321), the t RNA serine (positions 321-378), then the ORF for NADH subunit 1 (from 379 to the last position). These ORFs are translated in proteins, explaining the low probability they could be pseudogenes (Rogers & Griffiths-Jones 2012Rogers HH, Griffiths-Jones S 2012. Mitochondrial pseudogenes in the nuclear genomes of Drosophila. PLoS ONE 7: e32593.).
Global trees based on cyt b and COI sequences are presented in Figs 2, 3, respectively. According to Depaquit et al. (1998b)Depaquit J, Perrotey S, Lecointre G, Tillier A, Tillier S, Ferté H, Kaltenbach M, Léger N 1998b. Systématique moléculaire des Phlebotominae: étude pilote. Paraphylie du genre Phlebotomus. CR Acad Sci III 321: 849-855., Phlebotomus bergeroti has been selected to root the tree. All the species morphologically recognised are well individualised. We note that P. sergenti included two populations without any morphological difference. The identification of P. perniciosus and P. longicuspis is not doubtful. We did not record any atypical specimen.
: neighbour-joining tree based on mitochondrial DNA cytochrome b sequences rooted on Phlebotomus bergeroti. Bootstrap values after 1,000 replicates are indicated on the branches.
: neighbour-joining tree based on mitochondrial DNA cytochrome C oxidase I sequences rooted on Phlebotomus bergeroti. Bootstrap values after 1,000 replicates are indicated on the branches.
The double digestion of each PCR product confirms the expected fragments for all haplotypes (Tables I, II). The resolution of DNA fragment size by the gel fractionation method used is about 10 bp. The double digestion of COI by restriction enzymes TaqI and MspI is very efficient, but cannot unequivocally distinguish Phlebotomus ariasi and Sergentomyia schwetzi.
Species and populations examined in the present study - number and positions of cuts predicted for cytochrome C oxidase I mitochondrial DNA restriction fragment length polymorphism
Species and populations examined in the present study - number and positions of cuts predicted for cytochrome b mitochondrial DNA restriction fragment length polymorphism
The double digestion of cyt b by restriction enzymes AseI and MnlI provide restriction profiles indicated in Table II. On the one hand, it cannot individualise one population of P. sergenti, P. ariasi and P. riouxi. On the other hand, it cannot distinguish P. longicuspis and P. perfiliewi.
No partial digests were recognised in the analysis.
DISCUSSION
The specimens identified by morphology as belonging to a species are branched together regarding independently cyt b or COI sequences (Figs 2, 3).
Cyt b sequences provide a NJ tree in agreement with the traditional morphological taxonomy of the phlebotomine sandflies (Fig. 2). Sergentomyia are grouped together including Grassomyia dreyfussi. Concerning Larroussius, all of them are grouped together and two branches are individualised: one including P. ariasi and Phlebotomus chadlii and another containing P. perniciosus, P. longicuspis (including 2 lineages) and P. perfiliewi. These data are in accordance with those obtained by Esseghir et al. (2000)Esseghir S, Ready PD, Ben-Ismail R 2000. Speciation of Phlebotomus sandflies of the subgenus Larroussius coincided with the late Miocene-Pliocene aridification of the Mediterranean subregion. Biol J Linn Soc Lond 70: 189-219. on cyt b and Di Muccio et al. (2000)Di Muccio T, Marinucci M, Frusteri L, Maroli M, Pesson B, Gramiccia M 2000. Phylogenetic analysis of Phlebotomus species belonging to the subgenus Larroussius (Diptera, Psychodidae) by ITS2 rDNA sequences. Insect Biochem Mol Biol 30: 387-393. on rDNA internal transcribed spacer 2. Concerning the subgenus Paraphlebotomus, the species P. sergenti, P. chabaudi and P. riouxi are grouped together. The first one shows two lineages in its type-locality. Moreover, Phlebotomus alexandri is not included in this branch, as previously observed (Depaquit et al. 2000Depaquit J, Ferté H, Léger N, Killick-Kendrick R, Rioux JA, Killick-Kendrick M, Hanafi HA, Gobert S 2000. Molecular systematics of the phlebotomine sand flies of the subgenus Paraphlebotomus (Diptera, Psychodidae, Phlebotomus) based on ITS2 rDNA sequences. Hypotheses of dispersion and speciation. Insect Mol Biol 9: 293-300., Krüger et al. 2011Krüger A, Strüven L, Post RJ, Faulde M 2011. The sand flies (Diptera: Psychodidae, Phlebotominae) in military camps in northern Afghanistan (2007-2009), as identified by morphology and DNA ‘barcoding’. Ann Trop Med Parasitol 105: 163-176.).
The NJ tree based on COI sequences (Fig. 3) has a surprising topology: the species belonging to the subgenera Sergentomyia, Larroussius and Paraphlebotomus are not grouped together. Despite this curious branching, some results are congruent with cyt b: (i) the position of P. alexandri, (ii) the existence of two molecular lineages within P. sergenti topotypes, (iii) the individualisation of P. chabaudi and P. riouxi, (iv) the existence of two lineages within P. longicuspis and (v) a high variability within Sergentomyia minuta and Sergentomyia antennata.
Many lineages have been identified in P. sergenti in the literature from populations from different parts of the species distribution area and no study emphasise a link between the molecular variability and the morphology (Depaquit et al. 2002Depaquit J, Ferté H, Léger N, Lefranc F, Alves-Pires C, Hanafi H, Maroli M, Morillas-Marquez F, Rioux JA, Svobodova M, Volf P 2002. ITS2 sequences heterogeneity in Phlebotomus sergenti and Phlebotomus similis (Diptera, Psychodidae): possible consequences in their ability to transmit Leishmania tropica. Int J Parasitol 32: 1123-1131., Yahia et al. 2004Yahia H, Ready PD, Hamdani A, Testa JM, Guessous-Idrissi N 2004. Regional genetic differentiation of Phlebotomus sergenti in three Moroccan foci of cutaneous leishmaniasis caused by Leishmania tropica. Parasite 11: 189-199., Moin-Vaziri et al. 2007Moin-Vaziri V, Depaquit J, Yaghoobi-Ershadi MR, Oshaghi MA, Derakhshandeh-Peykar P, Ferté H, Kaltenbach M, Bargues MD, Léger N, Nadim A 2007. Intraspecific variation within Phlebotomus sergenti Parrot (1917) (Diptera: Psychodidae) based on mtDNA sequences in Islamic Republic of Iran. Acta Trop 102: 29-37., Barón et al. 2008Barón S, Martín-Sánchez J, Gállego M, Morales-Yuste M, Boussaa S, Morillas-Márquez F 2008. Intraspecific variability (rDNA ITS and mtDNA cyt b) of Phlebotomus sergenti in Spain and Morocco. Acta Trop 107: 259-267., Dvorak et al. 2011Dvorak V, Votypka J, Aytekin AM, Alten B, Volf P 2011. Intraspecific variability of natural populations of Phlebotomus sergenti, the main vector of Leishmania tropica. J Vector Ecol 36 (Suppl. 1): S49-S57.). The two mitochondrial lineages (cyt b as well as COI) within Algerian specimens of P. sergenti coming from different localities, all located just around the type locality area (Fig. 1) called Ain Touta, formerly Mac Mahon (Parrot 1917Parrot L 1917. Sur un nouveau phlébotome algérien Phlebotomus sergenti, sp. nov. Bull Soc Pathol Exot 10: 564-567.). This locality has not been precisely designated by Parrot (1917)Parrot L 1917. Sur un nouveau phlébotome algérien Phlebotomus sergenti, sp. nov. Bull Soc Pathol Exot 10: 564-567.. The specimens processed in the present study can be considered as being topotypes, clearly labelled and stored in the collection of the laboratory of Parasitology of the Faculty of Pharmacy of Reims. These two populations are strongly separated and are characterised by many variable nucleotidic positions: about 30 for cyt b and 40 for COI (Fig. 4). The mean pairwise distance between the two populations of P. sergenti (> 5%) is comparable to the pairwise distances individualising P. perniciosus from P. longicuspis or P. perfiliewi in the present study and question about the status of these populations.
: variable positions observed within Phlebotomus sergenti for cytochrome b and cytochrome C oxidase I (COI) mitochondrial DNA. Stars indicate the sites characterising the two populations.
The haplotypes obtained for P. perniciosus and P. longicuspis have been compared with those of cyt b available in the literature (Esseghir et al. 1997Esseghir S, Ready PD, Killick-Kendrick R, Ben-Ismail R 1997. Mitochondrial haplotypes and geographical variance of Phlebotomus vectors of Leishmania major. Insect Mol Biol 6: 211-255., Pesson et al. 2004Pesson B, Ready JS, Benabdennbi I, Martín-Sánchez J, Esseghir S, Cadi-Soussi M, Morillas-Marquez F, Ready PD 2004. Sand flies of the Phlebotomus perniciosus complex: mitochondrial introgression and a new sibling species of P. longicuspis in the Moroccan Rif. Med Vet Entomol 18: 25-37., Perrotey et al. 2005Perrotey S, Mahamdallie SS, Pesson B, Richardson KJ, Gállego M, Ready PD 2005. Postglacial dispersal of Phlebotomus perniciosus into France. Parasite 12: 283-291.) (Fig. 5). The main P. perniciosus Algerian haplotype is the same than the main Mediterranean haplotype (= pern01), but three new haplotypes are recorded from Algeria for this species. Concerning P. longicuspis, the most common haplotype is the lcus01. However, we record four new haplotypes including a couple (LC2 and LC637) strongly individualised from the other ones. The COI sequences also individualise the latter specimens from all other P. longicuspis (Fig. 3).
: alignment of cytochrome b haplotypes concerning Phlebotomus perniciosus and Phlebotomus longicuspis and showing exclusively the variable sites reported by Esseghir et al. (1997)Esseghir S, Ready PD, Killick-Kendrick R, Ben-Ismail R 1997. Mitochondrial haplotypes and geographical variance of Phlebotomus vectors of Leishmania major. Insect Mol Biol 6: 211-255., Pesson et al (2004) and Perrotey et al. (2005)Perrotey S, Mahamdallie SS, Pesson B, Richardson KJ, Gállego M, Ready PD 2005. Postglacial dispersal of Phlebotomus perniciosus into France. Parasite 12: 283-291.. The Algerian haplotypes are written in bold. The variations observed in Algerian specimens are underlined. The stars indicate the sites individualising the haplotypes LC2 and LC637.
Recently, the single digestion based on cyt b sequences by Latrofa et al. (2012)Latrofa MS, Annoscia G, Dantas-Torres F, Traversa D, Otranto D 2012. Towards a rapid molecular identification of the common phlebotomine sand flies in the Mediterranean Region. Vet Parasitol 184: 267-270. as a rapid molecular identification method for the common phlebotomine sandflies in the Mediterranean Region does not apply in Algeria. In fact, these authors focused on five species only, commonly caught in Italy: P. papatasi, P. perniciosus, P. perfiliewi, Phlebotomus neglectus and S. minuta. We tried this method on the Algerian sandflies, including P. papatasi. The method is not able to distinguish all the species and the combined double digestion of two different markers is needed for the specific identification. Due to the conservation of some parts of DNA sequences, the simple digestion of PCR products cannot separate some species belonging to different genera (like P. ariasi and S. schwetzi) or subgenera (like P. sergenti and P. ariasi). Consequently, this method is not enough discriminant to be used in routine all over the Mediterranean Basin. In fact, it is easier to firstly identify the species easy to recognise by a microscopical examination and secondly, to apply efficient PCR-RFLP methods to identify the species for which morphological identification is difficult, like the females of the Perniciosus complex, those of P. chabaudi and P. riouxi and for some Sergentomyia males.
ACKNOWLEDGEMENTS
To Kaouther Jaouadi, Mohammad Akhoundi and Mireille Cousinat, for their help, and to Sylvette Gobert, for proofreading this paper.
Supplementary data
Sampling speciesGenBank accession | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Genus | Subgenus | Species | Area | City | Catching method | Catching date | Gender | Specimen | cytB | COI |
Phlebotomus | Phlebotomus | P. bergeroti | Tamanrasset | Tamanrasset | UV | 15 Sep 2006 | ♂ | BER1TAM | KJ480973 | KJ481079 |
Paraphlebotomus | P. sergenti | Aurès | Menaa | CDC | 15 Sep 2007 | ♀ | SE670 | KJ480971 | KJ481077 | |
CDC | 15 Sep 2007 | ♀ | SE669 | KJ480966 | KJ481072 | |||||
CDC | 26 Sep 2007 | ♂ | SE621 | KJ480960 | KJ481066 | |||||
Tighargar | SP | 30 Aug 2006 | ♀ | SE335 | KJ480968 | KJ481074 | ||||
Bordj Bouarreridj | Khola | SP | 8 Jul 2007 | ♂ | SE675 | KJ480972 | KJ481078 | |||
SP | 29 Jun 2007 | ♂ | SE627 | KJ480965 | KJ481071 | |||||
Ghardaia | Ghardaia | SP | 20 Sep 2006 | ♂ | SE304 | KJ480967 | KJ481073 | |||
SP | 20 Sep 2006 | ♂ | SE307 | KJ480969 | KJ481075 | |||||
SP | 20 Sep 2006 | ♂ | SE305 | KJ480962 | KJ481068 | |||||
SP | 20 Sep 2006 | ♀ | SE312 | KJ480970 | KJ481076 | |||||
Metlili | SP | 6 Sep 2007 | ♂ | SE539 | KJ480963 | KJ481069 | ||||
SP | 06 Sep 2006 | ♂ | SE540 | KJ480964 | KJ481070 | |||||
SP | 19 Sep 2006 | ♀ | SE394 | KJ480961 | KJ481067 | |||||
P. alexandri | Aurès | El-kantra | CDC | 20 Sep 2007 | ♀ | AL646 | KJ480988 | KJ481093 | ||
Ghoufi | SP | 30 Aug 2006 | ♂ | AL300 | KJ480985 | KJ481090 | ||||
Menaa | SP | 13 Sep 2007 | ♂ | AL607 | KJ480987 | KJ481092 | ||||
Batna | Barika | SP | 1 Sep 2005 | ♂ | AL142 | KJ480981 | KJ481086 | |||
SP | 1 Sep 2005 | ♂ | AL215 | KJ480984 | KJ481089 | |||||
SP | 1 Sep 2005 | ♂ | AL117 | KJ480980 | KJ481085 | |||||
SP | 1 Sep 2005 | ♂ | AL202 | KJ480983 | KJ481088 | |||||
SP | 1 Sep 2005 | ♂ | AL116 | KJ480979 | KJ481084 | |||||
SP | 1 Sep 2005 | ♂ | AL114 | KJ480978 | KJ481083 | |||||
SP | 1 Sep 2005 | ♂ | AL200 | KJ480982 | KJ481087 | |||||
SP | 1 Sep 2005 | ♂ | AL110 | KJ480977 | KJ481082 | |||||
Ghardaia | Metlili | SP | 19 Sep 2006 | ♂ | AL372 | KJ480986 | KJ481091 | |||
Tamanrasset | Tamanrasset | UV | 15 Sep 2006 | ♂ | AL7TAM | KJ480990 | KJ481095 | |||
UV | 15 Sep 2006 | ♂ | AL28TAM | KJ480989 | KJ481094 | |||||
P. chabaudi | Aurès | Menaa | SP | 31 Aug 2006 | ♂ | CB2 | EU935791 | FJ196432 | ||
SP | 31 Aug 2006 | ♂ | CB1 | KJ480974 | FJ196431 | |||||
CDC | 26 Sep 2007 | ♂ | CB3 | EU935792 | FJ196433 | |||||
CDC | 26 Jan 1900 | ♂ | CB572 | EU935793 | FJ196434 | |||||
Ain-Zaatout | CDC | 20 Sep 2007 | ♂ | CB573 | EU935794 | FJ196435 | ||||
CDC | 20 Sep 2007 | ♀ | CB583ZAT | EU935795 | KJ481172 | |||||
P. riouxi | Ghardaïa | Ghardaïa | SP | 20 Sep 2006 | ♂ | RX1 | EU935815 | FJ196436 | ||
SP | 20 Sep 2006 | ♂ | RX2 | EU935816 | KJ481173 | |||||
SP | 20 Sep 2006 | ♂ | RX3 | EU935817 | FJ196437 | |||||
Metlili | SP | 19 Sep 2006 | ♂ | RX4 | EU935818 | FJ196438 | ||||
SP | 19 Sep 2006 | ♂ | RX5 | EU935819 | KJ481174 | |||||
SP | 19 Sep 2006 | ♂ | RX7 | EU935821 | FJ196439 | |||||
SP | 19 Sep 2006 | ♂ | RX8 | EU935822 | FJ196440 | |||||
SP | 19 Sep 2006 | ♂ | RX9 | EU935823 | FJ196441 | |||||
Larroussius | P. perniciosus | Aurès | Ain Zaatout | CDC | 11 Sep 2007 | ♂ | PN538 | KJ481033 | KJ481136 | |
CDC | 15 Sep 2007 | ♂ | PN668 | KJ481034 | KJ481137 | |||||
Menaa | CDC | 20 Sep 2007 | ♂ | PN597 | KJ481035 | KJ481138 | ||||
CDC | 26 Sep 2007 | ♂ | PN582 | KJ481036 | KJ481139 | |||||
Tazoult | CDC | 16 Sep 2007 | ♂ | PN517 | KJ481037 | KJ481140 | ||||
CDC | 16 Sep 2007 | ♂ | PN518 | KJ481038 | KJ481141 | |||||
Ghardaia | Metlili | CDC | 5 Sep 2007 | ♂ | PN660 | KJ481039 | KJ481142 | |||
CDC | 5 Sep 2007 | ♂ | PN656 | KJ481040 | KJ481143 | |||||
Jijel | Beni Ahmed | SP | 10 Aug 2004 | ♂ | PNBE2-1 | KJ481041 | KJ481144 | |||
Fdoules | CDC | 28 Aug 2007 | ♀ | PN643 | KJ481042 | KJ481145 | ||||
CDC | 15 Sep 2007 | ♂ | PN632 | KJ481043 | KJ481146 | |||||
CDC | 28 Aug 2007 | ♀ | PN642 | KJ481044 | KJ481147 | |||||
CDC | 26 Aug 2007 | ♀ | PN641 | KJ481045 | KJ481148 | |||||
Bordj Bouarreridj | Salama | SP | 1 Aug 2007 | ♀ | PN4 | KJ481046 | KJ481149 | |||
SP | 1 Aug 2007 | ♂ | PN677 | KJ481047 | KJ481150 | |||||
Mila | Ferdjioua | SP | 10 Sep 2004 | ♂ | PNFE1-2 | KJ481048 | KJ481151 | |||
SP | 10 Sep 2004 | ♂ | PNFE3 | KJ481049 | KJ481152 | |||||
Sidi- Khalifa | SP | 20 Aug 2004 | ♂ | PNSKH2 | KJ481050 | KJ481153 | ||||
Vieux Mila | SP | 23 Jul 2004 | ♂ | PNVIM 2 | KJ481051 | KJ481154 | ||||
P. longicuspis | Aurès | Menaa | CDC | 13 Sep 2007 | ♂ | LC601 | KJ481052 | KJ481155 | ||
CDC | 13 Sep 2007 | ♂ | LC509 | KJ481053 | KJ481156 | |||||
El-Kantra | CDC | 20 Sep 2007 | ♂ | LC644 | KJ481054 | KJ481157 | ||||
Tighargar | CDC | 14 Sep 2007 | ♀ | LC633 | KJ481055 | KJ481158 | ||||
Bordj Bouarreridj | Salama | SP | 1 Aug 2007 | ♀ | LC637 | KJ481056 | KJ481159 | |||
SP | 1 Aug 2007 | ♂ | LC2 | KJ481057 | KJ481160 | |||||
Madjana | SP | 1 Aug 2007 | ♂ | LC3 | KJ481058 | KJ481161 | ||||
Jijel | Beni Ahmed | CDC | 10 Aug 2004 | ♂ | LCBE1 | KJ481059 | KJ481162 | |||
Mila | Vieux Mila | SP | 12 Jul 2004 | ♂ | LCVIM6 | KJ481060 | KJ481163 | |||
M’Sila | Boussaada | CDC | 15 Aug 2007 | ♀ | LC549 | KJ481061 | KJ481164 | |||
CDC | 15 Aug 2007 | ♂ | LC553 | KJ481062 | KJ481165 | |||||
CDC | 15 Aug 2007 | ♂ | LC545 | KJ481063 | KJ481166 | |||||
CDC | 6 Aug 2006 | ♂ | LC331 | KJ481064 | KJ481167 | |||||
CDC | 15 Aug 2007 | ♂ | LC548 | KJ481065 | KJ481168 | |||||
P. perfiliewi | Jijel | Beni Ahmed | SP | 10 Aug 2004 | ♂ | PFBE1 | KF680819 | KJ481175 | ||
SP | 10 Aug 2004 | ♂ | PFBE2 | KF680820 | KJ481176 | |||||
SP | 10 Aug 2004 | ♀ | PFBE7 | KF680821 | KJ481177 | |||||
Mila | Ferdjioua | SP | 10 Sep 2004 | ♂ | PFFE1 | KJ480975 | KJ481080 | |||
M’Sila | Adama | CDC | 1 Aug 2007 | ♀ | PF635 | KJ480976 | KJ481081 | |||
P. ariasi | Aurès | Ain Zatout | CDC | 11 Sep 2007 | ♂ | AR529 | HM131125 | KJ481169 | ||
CDC | 11 Sep 2007 | ♂ | AR526 | HM131125 | KJ481170 | |||||
Menaa | CDC | 26 Sep 2007 | ♀ | AR576 | HM131125 | KJ481171 | ||||
P. chadlii | Aurès | Ain Zaatout | CDC | 11 Sep 2007 | ♂ | CD525 | HM131080 | KJ499906 | ||
Nara | SP | 30 Aug 2006 | ♂ | CD1 | HM131079 | KJ499904 | ||||
SP | 30 Aug 2006 | ♂ | CD2 | HM131079 | KJ499905 | |||||
Phlebotomus | Phlebotomus | S. fallax | Aurès | Ain Zaatout | CDC | 15 Sep 2007 | ♀ | FAL666 | KJ480998 | KJ481103 |
CDC | 20 Sep 2007 | ♂ | FAL542 | KJ481000 | KJ481105 | |||||
Menaa | CDC | 26 Sep 2007 | ♀ | FAL578 | KJ480992 | KJ481097 | ||||
CDC | 26 Sep 2007 | ♀ | FAL581 | KJ480995 | KJ481100 | |||||
CDC | 13 Sep 2007 | ♀ | FAL599 | KJ480999 | KJ481104 | |||||
CDC | 13 Sep 2007 | ♂ | FAL610 | KJ480996 | KJ481101 | |||||
CDC | 26 Sep 2007 | ♀ | FAL578 | KJ480992 | KJ481097 | |||||
Tazoult | CDC | 20 Sep 2007 | ♀ | FAL618 | KJ480994 | KJ481099 | ||||
CDC | 20 Jan 1900 | ♀ | FAL612 | KJ480997 | KJ481102 | |||||
CDC | 15 Sep 2007 | ♂ | FAL613 | KJ480993 | KJ481098 | |||||
Ghardaia | Metlili | CDC | 6 Sep 2007 | ♂ | FAL519 | KJ480991 | KJ481096 | |||
S. minuta | Aurès | Ain Zaatout | CDC | 20 Sep 2007 | ♀ | SM544 | KJ481013 | KJ481114 | ||
CDC | 11 Sep 2007 | ♀ | SM530 | KJ481017 | KJ481120 | |||||
Jijel | Beni Ahmed | SP | 10 Aug 2004 | ♀ | SMBEN1 | KJ481011 | KJ481180 | |||
Chemla | CDC | 13 Sep 2007 | ♀ | SM605 | KJ481015 | KJ481118 | ||||
Menaa | CDC | 20 Sep 2007 | ♀ | SM596 | KJ481016 | KJ481119 | ||||
Batna | Barika | SP | 1 Sep 2005 | ♂ | SM213 | KJ481009 | KJ481181 | |||
Ghardaia | Metlili | CDC | 5 Sep 2007 | ♀ | SM515 | KJ481012 | KJ481115 | |||
CDC | 5 Sep 2007 | ♂ | SM561 | KJ481014 | KJ481117 | |||||
M’Sila | Boussaada | CDC | 15 Aug 2007 | ♀ | SM554 | KJ481013 | KJ481114 | |||
Mila | Vieux Mila | SP | 10 Aug 2004 | ♂ | SMVIM3 | KJ481019 | KJ481122 | |||
CDC | 10 Sep 2004 | ♀ | SMVIM2 | KJ481018 | KJ481121 | |||||
S. antennata | Aurès | El-Kentra | SP | 20 Sep 2007 | ♂ | ANT522 | KJ481007 | KJ481112 | ||
SP | 12 Sep 2007 | ♀ | ANT630 | KJ481008 | KJ481113 | |||||
Batna | Barika | SP | 1 Sep 2005 | ♀ | ANT209 | KJ481006 | KJ481111 | |||
Ghardaïa | Ghardaia | SP | 20 Sep 2006 | ♂ | ANTGARD | KJ481005 | KJ481110 | |||
S. schwetzi | Tamanrasset | Tamanrasset | UV | 15 Sep 2006 | ♂ | SW5TAM | KJ481020 | KJ481123 | ||
UV | 15 Sep 2006 | ♂ | SW6TAM | KJ481022 | KJ481125 | |||||
UV | 15 Sep 2006 | ♀ | SW14TAM | KJ481021 | KJ481124 | |||||
UV | 15 Sep 2006 | ♀ | SW15TAM | KJ481023 | KJ481123 | |||||
Sintonius | S. clydei | Aurès | Tazoult | CDC | 23 Sep 2007 | ♂ | CLY614 | KJ481032 | KJ481135 | |
Tamanrasset | Tamanrasset | UV | 15 Sep 2006 | ♂ | CLY10TAM | KC669793 | KJ481179 | |||
UV | 15 Sep 2006 | ♂ | CLY17TAM | KJ481031 | KJ481134 | |||||
UV | 15 Sep 2006 | ♀ | CLY24TAM | KC669796 | KJ481178 | |||||
S. christophersi | Ghardaia | Metlili | CDC | 5 Sep 2007 | ♂ | CHR654 | KJ481025 | KJ481128 | ||
CDC | 5 Sep 2007 | ♂ | CHR657 | KJ481026 | KJ481129 | |||||
CDC | 6 Sep 2007 | ♀ | CHR651 | KJ481024 | KJ481127 | |||||
CDC | 5 Sep 2007 | ♂ | CHR 653 | KJ481027 | KJ481130 | |||||
SP | 19 Sep 2006 | ♀ | CHR351 | KJ481030 | KJ481133 | |||||
SP | 19 Sep 2006 | ♀ | CHR349 | KJ481029 | KJ481132 | |||||
SP | 5 Sep 2007 | ♀ | CHRMEK | KJ481028 | KJ481131 | |||||
Grassomyia | G. dreyfussi | Aurès | Ain Zaatout | CDC | 11 Sep 2007 | ♀ | DRY527 | KJ481001 | KJ481106 | |
CDC | 15 Sep 2007 | ♀ | DRY664 | KJ481003 | KJ481108 | |||||
Ghardaia | Metlili | CDC | 5 Sep 2007 | ♀ | DRY560 | KJ481004 | KJ481109 | |||
CDC | 5 Sep 2007 | ♀ | DRY567 | KJ481002 | KJ481107 |
CDC: miniature light traps; cyt B: cytochrome b; SP: sticky papers; UV: ultraviolet CDC.
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Publication Dates
-
Publication in this collection
06 June 2014 -
Date of issue
July 2014
History
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Received
16 Dec 2013 -
Accepted
17 Mar 2014