Scielo RSS <![CDATA[Entomología y Vectores]]> http://www.scielo.br/rss.php?pid=0328-038120040004&lang=en vol. 11 num. 4 lang. en <![CDATA[SciELO Logo]]> http://www.scielo.br/img/en/fbpelogp.gif http://www.scielo.br <![CDATA[<B>Rodolfo Ubaldo Carcavallo (<b>«</b> 1931 † 2004)</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0328-03812004000400001&lng=en&nrm=iso&tlng=en <![CDATA[<B>Elio Corseuil</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0328-03812004000400002&lng=en&nrm=iso&tlng=en <![CDATA[<B>Enzootic level of the external parasites on samples of <I>Columbina talpacoti</I> (Temminck, 1810) in Rio de Janeiro, Brazil</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0328-03812004000400003&lng=en&nrm=iso&tlng=en O primeiro inquérito sobre a fauna de ectoparasitos em rolinha (Columbina talpacoti) é feito no Brasil. As espécies de ectoparasitos encontrados foram: Microlynchia pussila (Speiser, 1902) (Diptera); Columbicola passerinae (Wilson, 1941) and Physconelloides eurysema (Carriker, 1903) (Phthiraptera: Ischnocera); Hohorstiella passerinae Hill & Tull, 1978 (Phthiraptera: Amblycera) and Byersalges talpacoti (Cerný, 1972), Diplaegidia columbigallinae (Cerný, 1972), Nanolichus sp. and Pterophagus lomatus Gaud & Barré, 1992 (Acari: Acaridida), sendo B. talpacoti a espécie de maior prevalência.<hr/>First survey on the fauna of ectoparasites found on the Ruddy Ground-Dove (Columbina talpacoti) is made in Brazil. The species of joined ectoparasites were: Microlynchia pussila (Speiser, 1902) (Diptera); Columbicola passerinae (Wilson, 1941) and Physconelloides eurysema (Carriker, 1903) (Phthiraptera: Ischnocera); Hohorstiella passerinae Hill & Tull, 1978 (Phthiraptera: Amblycera) and Byersalges talpacoti (Cerný, 1972), Diplaegidia columbigallinae (Cerný, 1972), Nanolichus sp. and Pterophagus lomatus Gaud & Barré, 1992 (Acari: Acaridida), being B. talpacoti the most prevalent species. <![CDATA[<B>A peridomestic population of the tsetse fly <I>Glossina palpalis palpalis</I> Robineau-Desvoidy, 1830 (Diptera: Glossinidae) at Kontagora town, Niger state, Nigeria</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0328-03812004000400004&lng=en&nrm=iso&tlng=en The present article considers some aspects of a peridomestic population of the tsetse fly Glossina palpalis palpalis Robineau-Desvoidy, 1830 in Kontagora, Nigeria. This situation characterizes an abnormal behaviour of the vector, and it is of significant epidemiological importance. Data on the ecology of this species were collected in 1995 and 1999. The results indicated that the species exists during both dry and wet seasons; approximately 30.0% of the catches were gorged with blood giving a MHS of 2.4, indicating a well-nourished population. Dissection of inseminated pars indicated pregnancy rates of approximately 30.0% and 70.0% in the dry and wet seasons and the presence of all 4 stages of pregnancy, suggesting that breeding occurs at both seasons. Longevity of flies was approximately 16 days in dry season and 25 days in the wet season. Overall results indicated that vector/host contact was high and the fly population has adapted and actively breeding in the area. Trypanosome infection rates of 18.2% consist of 1 brucei-type and 5 vivax-type infections. The public health implications of the close proximity of the wild natural reservoir hosts of the human T. b. gambiense Dutton, 1902 parasites at the Kainji Wild Life park is discussed.<hr/>O artigo aborda alguns aspectos das populações peridomésticas das moscas tse-tsé Glossina palpalis palpalis Robinezu-Desvoidy, 1830 em Kontagora, Nigéria. Foi caracterizado um comportamento anormal deste vetor e que é de importância epidemiológica significante. Dados sobre a ecologia foram obtidos em 1995 e 1999. Os resultados indicam que esse vetor ocorre durante as estações seca e chuvosa; aproximadamente 30% dos exemplares estavam repletos de sangue, resultando em um MHS de 2,4, indicando uma população bem alimentada. Dissecação de pares inseminados indicam uma porcentagem de fertilidade de aproximadamente 30% e 70% nas estações seca e chuvosa e, a presença de todos os 4 estágios de fertilidade sugere que os criadouros se mantém em ambas as estações. A longevidade das moscas é de aproximadamente 16 dias na estação seca e 25 dias na chuvosa. Os resultados mostram que a relação vetor/hospedeiro é alta e que a população das moscas tem se adaptado, se desenvolvendo ativamente na área estudada. O índice de infecção de 18,2% consiste de uma tipo-brucei e 5 tipo-vivax. São discutidas as implicações na saúde pública da grande proximidade dos hospedeiros naturais silvestres do parasita humano T.b. gambiensi Dutton, 1902 no parque Kainji Wild Life. <![CDATA[<B>Fluorescent and incandescent light attractiveness to mosquitos (Diptera: Culicidae)</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0328-03812004000400005&lng=en&nrm=iso&tlng=en Programas de eletrificação rural em áreas isoladas, implantados com base em instalações fotovoltaicas e tradicionais, introduziriam um novo fator antrópico, que levantam suspeitas de associação à transmissão de doenças por culicídeos. Para testar atratividade de mosquitos por diferentes tipos de lâmpadas, foram utilizadas duas armadilhas tipo New Jersey, uma com lâmpada incandescente de 40 watts, e a outra, provida de bulbo fluorescente, compacta e com reator eletrônico de cor de igual intensidade luminosa, de 9 watts, com luz de temperatura de 6.200 K. Essas armadilhas operaram em duas áreas, em tempo e locais padronizados, totalizando 11 coletas, no período de janeiro a abril de 2002. Os resultados mostram que a lâmpada fluorescente atraiu 1,3 vezes mais culicídeos em relação à incandescente nas duas áreas. Foram coletados no total 806 espécimes, destacando-se: Aedes albopictus Skuse, 1894, Ochlerotatus scapularis (Rondani, 1848), Anopheles albitarsis Lynch Arribálzaga, 1878, Culex (Culex) nigripalpus Theobald, 1901, entre outros. Sugere-se que sejam realizados estudos antes da efetivação de programas de eletrificação rural para avaliar as conseqüências epidemiológicas desses empreendimentos.<hr/>Rural electrification programs in remote areas based on both photovoltaic and traditional installations, could introduce a new anthropic factor, which is associated with Culicidae. To evaluate differences in mosquitoes attractiveness in relation to types of lamps two New Jersey traps were used: one with a 40 W incandescent lamp and the other with the same light intensity, a 9 W fluorescent bulb, compact, with an electronic reactor with 6.200 K of light temperature. The traps were set in two chosen areas according time and place previously established in a total of 11 collections from January and April 2002. The results show that the fluorescent lamp attracted 1,3 more culicidae than the incandescent lamp, in both areas a total of 806 specimens were collected including Aedes albopictus Skuse, 1894, Ochlerotatus scapularis (Rondani, 1848), Anopheles albitarsis Lynch Arribálzaga, 1878, Culex (Culex) nigripalpus, Theobald, 1901, among others. Studies should be carried out before the rural electrifications programs are implemented in order to evaluate the epidemiological consequences of such enterprises. <![CDATA[<B>Description of genitalia of <I>Neoblattella</I> Shelford, 1911 with key for identification and considerations about the genus (Blattaria, Blattellidae)</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0328-03812004000400006&lng=en&nrm=iso&tlng=en Neste trabalho sete espécies de Neoblattella Shelford, 1911 são estudadas e descritas, pela primeira vez, as genitálias do macho e da fêmea. Com base nesse estudo são reunidas em quatro grupos, com a finalidade de estabelecer relação entre elas e elucidar problemas taxonômicos.<hr/>In this paper seven species of Neoblattella Shelford, 1911 are studied and, in first time, described the female and male's genitalia. The species are gathered in four groups with the purpose of establishing relationship among them and to elucidate taxonomics problems. <![CDATA[<B>Exochorial aspects of eggs of <I>Triatoma patagonica</I> Del Ponte, 1929 shown by scanning electron microscopy</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0328-03812004000400007&lng=en&nrm=iso&tlng=en Se estudiaron por microscopía electrónica de barrido (SEM) los patrones geométricos de las células de huevos de Triatoma patagonica Del Ponte, 1929, especie considerada vector activo de la enfermedad de Chagas. Se seleccionaron huevos de edad conocida: 5 días, 14 días y eclosionados, según sus características morfológicas y se registraron imágenes del exocorion en las zonas cefálica (opérculo), caudal y media. Los resultados obtenidos mostraron que los huevos de T. patagonica presentan en sus zonas cefálica y caudal, células con forma de hexágonos, pentágonos y cuadriláteros y en la media principalmente hexágonos. Se observó que los patrones geométricos de las distintas partes del huevo no cambian durante el desarrollo embrionario.<hr/>The geometrical patterns of egg cells of Triatoma patagonica Del Ponte, 1929, a species considered to be an active vector of Chagas' disease, were studied by scanning electron microscopy (SEM). Eggs of known age were selected according to their morphological characteristics, namely those which were 5 days old, 14 days old, and those which were hatched. Images of the exchorion were registered in the cephalic, caudal, and medial areas. The results showed that T. patagonica eggs evidence that in their cephalic and caudal areas, cells have either an hexagonal, pentagonal, or quadrilateral configuration, while in the medial area, cells have mainly an hexagonal configuration. It was also observed that the geometrical patterns of the different parts of the egg undergo no changes during embryonal development. <![CDATA[<B>A record of <I>Gracilinanus agilis</I> (Marsupialia, Didelphidae) parasited by <I>Metacuterebra apicalis</I> (Diptera, Cuterebridae) in the cerrado of Brasília, Distrito Federal, Brazil</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0328-03812004000400008&lng=en&nrm=iso&tlng=en The first report of infection caused by maggots of the botfly Metacuterebra apicalis (Guérin-Méneville) on miceopossums Gracilinanus agilis (Burmeister) is presented. The examined individuals collected in the cerrado vegetation in Brasilia, DF, Brazil, showed infections in ventral area of the body, around genital organs. Two botflies (male and female) emerged in a period of 29 to 31 days. <![CDATA[<B>Sandflies of municipalities in North of Paraná State, South of Brazil</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0328-03812004000400009&lng=en&nrm=iso&tlng=en This work reports the results of sandfly collections in several places, during 2001 and 2002, in Bom Sucesso, Jardim Alegre, Kaloré, Londrina and Sabáudia municipalities, North of the State. The sandflies catches were performed with Shannon and Falcão traps in domiciliary areas, domestic animal shelters, barns and in the forest. A total of 4,019 specimens of 8 species were captured. Nyssomyia whitmani predominates in all of the municipalities. The species Migonemyia migonei, Nyssomyia neivai and N. whitmani may be involved in the epidemiology of American Tegumentary Leishmaniasis in this state. <![CDATA[<B>On the association of <I>Philopota</I> sp. (Diptera, Acroceridae) with flowers of gervão-azul, <I>Stachytarphetta cayenensis</I> (Verbenaceae) in Marambaia Island, Rio de Janeiro, Brazil</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0328-03812004000400010&lng=en&nrm=iso&tlng=en The acrocerids (small headed-flies) form a small group of flies, which are difficult to find and observe. They are rare in collections. Their larvae are heteromorphic parasitoids of many families of spiders and their imagoes show a great deal of morphological variation. Little is known about the biology and systematics of this group in the Neotropical region, especially the Philopotinae. Most studies are based on species from Europe and North America. The Philopotinae occurs througout the world, and are characterized by the strongly developed postpronota, which form a shield dorsally in front of the scutum. Fifty specimens of Philopota sp. were collected from branches of Stachytarphetta cayenensis (Verbenaceae) in the Ilha da Marambaia (23º 04' S - 43º 53' W, 240 m), southern coast of Rio de Janeiro State, Brazil. The specimens were determined to Philopota n.sp. (acc. to Evert I. Schlinger). In Marambaia, S. cayenensis occurs alongside trails. Small lycosid spiders were observed associated with litter in the surrounding soil. Both males and females of Philopota n.sp. visit the flowers periodically. Couples in sexual intercourse were observed on the flowers. When feeding, they introduced their whole bodies inside the flower. A territorial behavior was observed involving both males and females. Up to four individuals were observed disputing a flower of S. cayenensis at the same time.