Pesquisa | SciELO

Pectis brevipedunculata is native species and widely available in dry and semi-arid ecosystems showing high biotechnological potential. The objective of this study was to evaluate the circadian and seasonal chemical variation of the essential oil (EO) of P. brevipedunculata, as well as its acaricide effect on Rhipicephalus microplus larvae. Aerial parts were collected and submitted to the hydrodistillation process, and the chemical composition was determined by gas chromatography mass spectrometry (GC-MS). For the assays with R. microplus, the larval immersion test was performed. The main constituents were citral (75% of the EO), followed by α-pinene and limonene. In the seasonality analysis, the highest yields were in the months of April (2.08%) and August (2.05%), while in the study of circadian rhythm, the percentage was 2.0% at 6 p.m. in the rainy season, and 1.2%, dry season at 6 p.m. Concerning acaricidal activity (50% lethal concentration (LC50)), the April (1.17 mg mL-1), March (1.28 mg mL-1), June (1.37 mg mL-1), and October (1.27 mg mL-1) oils obtained were the most active and assays performed with circadian rhythm revealed in the rain season (April) at 6 p.m. and dry season (September) at 12 a.m. LC50 values of 1.75 and 1.75 mg mL-1, respectively. Additionally, this EO is selective to non-target organisms, i.e., ladybeetles and lacewing.

https://doi.org/10.21577/0103-5053.20230017

Scientific diving in Brazil: history, present and perspectives
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Leite, Tatiana S.

; Pinheiro, Igor E.

; Berchez, Flávio

; Bertoncini, Áthila A.

; Cima, Oswaldo M. Del

; Demetrescu, Irene E.

; Francini-Filho, Ronaldo B.

; Kikuchi, Ruy K.P

; Machado, Arthur A.

; Maia-Nogueira, Rodrigo

; Martins, Flavio L.

; Mendes, Liana F.

; Rambelli, Gilson

; Sampaio, Claudio L.S.

; Segal, Barbara

; Aguiar, Aline A.

; Auler, Augusto S.

; Barroco-Neto, José

; Bonaldo, Roberta M.

; Buchmann, Francisco S.

; Calippo, Flavio

; Cesar, Augusto

; Gama, Matheus A.C.

; Ghilardi-Lopes, Natalia

; Leão, Zelinda M.A.N.

; Lessa, Guilherme C.

; Menegola, Carla

; Pinheiro, Hudson T.

; Rocha, Luiz A.

; Sabino, José

; Seoane, José C.S.

; Sestokas, Julia

; Tiago, Cláudio C.

; Wegner, Ewerton

; Lotufo, Tito

Ocean and Coastal Research

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2023, Volume 71 elocation e23045

Resumo: En | Texto: En | PDF: En

Abstract Scientific diving (SD) is defined as any diving activity that applies scientific procedures to produce subsidies for studies and technical works in underwater environments. The first report of an underwater scientific study in Brazil dates to the 19th century, in the Abrolhos reefs. Currently, in Brazil, scientific diving has been performed in various areas, from shallow coastal regions to remote and sometimes hard-to-reach places, such as oceanic islands, flooded caves, and icy areas like Antarctica. However, the regulation of SD in Brazil still lacks more concrete actions towards an effective and efficient self-regulation that offers physical safety to practitioners and institutional safeguards for organizations that use it in their research projects. Thus, this article aims to contribute to a better understanding of this critical issue in Brazil and to serve as a reference and incentive for the training of professionals and the development of these activities in the country. It includes: 1) a historical review of SD; 2) a diagnosis of the training and application of SD in Brazil; 3) the evolution of marine sciences in Brazil from the perspective of SD; 4) a review of the use of environmental assessment and underwater conservation techniques in oceans and internal waters; 5) an analysis of the evolution of scientific diver training in Brazil, including a diagnosis on training; 6) the history and updates of the rules, regulations, and safety of SD. Given all the potential of diving combined with specific techniques for research, monitoring, and marine and limnic science in Brazil, we aim to understand the evolution of scientific diving teaching and to outline perspectives in the country, as it is crucial for the training of qualified scientists capable of performing these underwater tasks. Finally, we present future plans for the development of this activity in Brazil from the point of view of research and the labor market.

https://doi.org/10.1590/2675-2824071.23036tsl

Design of a specific peptide against phenolic glycolipid-1 from Mycobacterium leprae and its implications in leprosy bacilli entry
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Arenas, Nelson Enrique

; Pieffet, Gilles

; Rocha-Roa, Cristian

; Guerrero, Martha Inírida

Memórias do Instituto Oswaldo Cruz

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2022, Volume 117 elocation e220025

Resumo: En | Texto: En | PDF: En

BACKGROUND Mycobacterium leprae, the causative agent of Hansen’s disease, causes neural damage through the specific interaction between the external phenolic glycolipid-1 (PGL-1) and laminin subunit alpha-2 (LAMA2) from Schwann cells. OBJECTIVE To design a LAMA2-based peptide that targets PGL-1 from M. leprae. METHODS We retrieved the protein sequence of human LAMA2 and designed a specific peptide using the Antimicrobial Peptide Database and physicochemical parameters for antimycobacterial peptide-lipid interactions. We used the AlphaFold2 server to predict its three-dimensional structure, AUTODOCK-VINA for docking, and GROMACS programs for molecular dynamics simulations. FINDINGS We analysed 52 candidate peptides from LAMA2, and subsequent screening resulted in a single 60-mer peptide. The mapped peptide comprises four β-sheets and a random coiled region. This peptide exhibits a 45% hydrophobic ratio, in which one-third covers the same surface. Molecular dynamics simulations show that our predicted peptide is stable in aqueous solution and remains stable upon interaction with PGL-1 binding. In addition, we found that PGL-1 has a preference for one of the two faces of the predicted peptide, which could act as the preferential binding site of PGL-1. MAIN CONCLUSIONS Our LAMA2-based peptide targeting PGL-1 might have the potential to specifically block this key molecule, suggesting that the preferential region of the peptide is involved in the initial contact during the attachment of leprosy bacilli to Schwann cells.

https://doi.org/10.1590/0074-02760220025

Risk factors for human Mycobacterium bovis infections in an urban area of Brazil
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Silva, Marcio Roberto

; Rocha, Adalgiza da Silva

; Araújo, Flábio Ribeiro

; Fonseca-Júnior, Antônio Augusto

; Alencar, Andrea Padilha de

; Suffys, Philip Noel

; Costa, Ronaldo Rodrigues da

; Moreira, Maria Aparecida Scatamburlo

; Guimarães, Mark Drew Crosland

Memórias do Instituto Oswaldo Cruz

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2018, Volume 113 Nº 8 elocation e170445

Resumo: En | Texto: En | PDF: En

BACKGROUND The World Health Organization (WHO) has classified human zoonotic tuberculosis (TB) due to Mycobacterium bovis as a neglected issue in the developing world. In a recent cross-sectional study in Brazil, three of 189 TB patients presented with a coinfection of M. bovis and M. tuberculosis and were selected as cases for this study. OBJECTIVE The aim was to evaluate risk factors (RF) for zoonotic TB in an urban area of Brazil in order to guide preventive programmes. METHODS A matched case-control study was carried out nested within a cross-sectional study. For each of the three cases, 14 age- and sex-matched controls (TB due to M. tuberculosis) were selected. FINDINGS Zoonotic potential exposures (ZE) and extrapulmonary TB (EPTB) were independently associated with zoonotic TB in multivariate analyses. CONCLUSIONS ZE by occupation and consumption of raw milk and derivative products that place individuals in direct and indirect contact with animals and their excretions/secretions increase the risk for zoonotic TB in Brazil, especially among those with EPTB. Therefore, measures such as efficient control of bovine TB, distribution of pasteurised milk and its derivative products, and the diagnosis and monitoring of zoonotic TB in humans are essential steps, especially in developing countries where bovine TB is enzootic, and further studies are necessary.

https://doi.org/10.1590/0074-02760170445 2022 downloads

Tuberculosis patients co-infected with Mycobacterium bovis and Mycobacterium tuberculosis in an urban area of Brazil
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Silva, Marcio Roberto

; Rocha, Adalgiza da Silva

; Costa, Ronaldo Rodrigues da

; Alencar, Andrea Padilha de

; Oliveira, Vania Maria de

; Fonseca Junior, Antonio Augusto

; Sales, Mariana Lazaro

; Issa, Marina de Azevedo

; Soares Filho, Paulo Martins

; Pereira, Omara Tereza Vianello

; Santos, Eduardo Calazans dos

; Mendes, Rejane Silva

; Ferreira, Angela Maria de Jesus

; Mota, Pedro Moacyr Pinto Coelho

; Suffys, Philip Noel

; Guimaraes, Mark Drew Crosland

Memórias do Instituto Oswaldo Cruz

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Mai 2013, Volume 108 Nº 3 Páginas 321 - 327

Resumo: En | Texto: En | PDF: En

In this cross-sectional study, mycobacteria specimens from 189 tuberculosis (TB) patients living in an urban area in Brazil were characterised from 2008-2010 using phenotypic and molecular speciation methods (pncA gene and oxyR pseudogene analysis). Of these samples, 174 isolates simultaneously grew on Löwenstein-Jensen (LJ) and Stonebrink (SB)-containing media and presented phenotypic and molecular profiles of Mycobacterium tuberculosis, whereas 12 had molecular profiles of M. tuberculosis based on the DNA analysis of formalin-fixed paraffin wax-embedded tissue samples (paraffin blocks). One patient produced two sputum isolates, the first of which simultaneously grew on LJ and SB media and presented phenotypic and molecular profiles of M. tuberculosis, and the second of which only grew on SB media and presented phenotypic profiles of Mycobacterium bovis. One patient provided a bronchial lavage isolate, which simultaneously grew on LJ and SB media and presented phenotypic and molecular profiles of M. tuberculosis, but had molecular profiles of M. bovis from paraffin block DNA analysis, and one sample had molecular profiles of M. tuberculosis and M. bovis identified from two distinct paraffin blocks. Moreover, we found a low prevalence (1.6%) of M. bovis among these isolates, which suggests that local health service procedures likely underestimate its real frequency and that it deserves more attention from public health officials.

https://doi.org/10.1590/S0074-02762013000300010 3619 downloads

Comparative bionomics of four populations of Meccus longipennis (Hemiptera: Reduviidae: Triatominae) under laboratory conditions
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Martínez-Ibarra, José Alejandro

; Nogueda-Torres, Benjamín

; Licón-Trillo, Ángel

; Villagrán-Herrera, María Elena

; Diego-Cabrera, José Antonio de

; Montañez-Valdez, Oziel Dante

; Rocha-Chávez, Gonzalo

Memórias do Instituto Oswaldo Cruz

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Abr 2013, Volume 108 Nº 2 Páginas 239 - 242

Resumo: En | Texto: En | PDF: En

The values of biological parameters related to the life cycles of four populations of Meccus longipennis (Reduviidae: Triatominae) were evaluated. Cohorts of each of the four studied populations from different geographical areas of Mexico were maintained under similar laboratory conditions and then compared. The population from El Saucito de Araujo was different from the other three studied populations, which could help explain the secondary importance of M. longipennis in the state of Chihuahua. This paper also supports the proposition that biological traits are important criteria for determining relationships between populations.

https://doi.org/10.1590/0074-0276108022013018 1733 downloads

Mycobacterium leprae in six-banded (Euphractus sexcinctus) and nine-banded armadillos (Dasypus novemcinctus) in Northeast Brazil
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Frota, Cristiane Cunha

; Lima, Luana Nepomuceno Costa

; Rocha, Adalgiza da Silva

; Suffys, Philip Noel

; Rolim, Benedito Neilson

; Rodrigues, Laura Cunha

; Barreto, Maurício Lima

; Kendall, Carl

; Kerr, Ligia Regina Sansigolo

Memórias do Instituto Oswaldo Cruz

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Dez 2012, Volume 107 Supl. 1 Páginas 209 - 213

Resumo: En | Texto: En | PDF: En

Human beings are the main reservoir of the causative agent of leprosy, Mycobacterium leprae. In the Americas, nine-banded armadillos (Dasypus novemcinctus) also act as a reservoir for the bacillus. In the state of Ceará (CE), which is located in Northeast Brazil and is an endemic area of leprosy, there are several species of armadillos, including D. novemcinctus and Euphractus sexcinctus (six-banded armadillo). Contact between humans and armadillos occur mainly through hunting, cleaning, preparing, cooking and eating. This study identified M. leprae DNA in the two main species of armadillos found in Northeast Brazil. A total of 29 wild armadillos (27 D. novemcinctus and 2 E. sexcinctus) were captured in different environments of CE countryside. Samples from the ear, nose, liver and spleen from each of these animals were tested by a nested M. leprae-specific repetitive element polymerase chain reaction assay. The samples that tested positive were confirmed by DNA sequencing. M. leprae was detected in 21% (6/29) of the animals, including five D. novemcinctus and one E. sexcinctus. This is the first Brazilian study to identify the presence of a biomarker of M. leprae in wild armadillos (D. novemcinctus and E. sexcinctus) in a leprosy hyperendemic area where there is continuous contact between humans and armadillos.

3550 downloads Citado 4 vezes em SciELO

Lower production of IL-17A and increased susceptibility to Mycobacterium bovis in mice coinfected with Strongyloides venezuelensis
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Dias, Alyria Teixeira

; Castro, Sandra Bertelli Ribeiro de

; Alves, Caio César Souza

; Rezende, Alice Belleigoli

; Rodrigues, Michele Fernandes

; Machado, Rachel Rocha Pinheiro

; Fernandes, Adriana

; Negrão-Corrêa, Deborah

; Teixeira, Henrique Couto

; Ferreira, Ana Paula

Memórias do Instituto Oswaldo Cruz

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Ago 2011, Volume 106 Nº 5 Páginas 617 - 619

Resumo: En | Texto: En | PDF: En

The presence of intestinal helminths can down-regulate the immune response required to control mycobacterial infection. BALB/c mice infected with Mycobacterium bovis following an infection with the intestinal helminth Strongyloides venezuelensis showed reduced interleukin-17A production by lung cells and increased bacterial burden. Also, small granulomas and a high accumulation of cells expressing the inhibitory molecule CTLA-4 were observed in the lung. These data suggest that intestinal helminth infection could have a detrimental effect on the control of tuberculosis (TB) and render coinfected individuals more susceptible to the development of TB.

2794 downloads Citado 1 vez em SciELO

Identification of Mycobacterium tuberculosis complex based on amplification and sequencing of the oxyR pseudogene from stored Ziehl-Neelsen-stained sputum smears in Brazil
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Silva, Marcio Roberto

; Guimarães, Mark Drew Crosland

; Oliveira, Vania Maria de

; Moreira, Aline dos Santos

; Costa, Ronaldo Rodrigues da

; Abi-Zaid, Kelly Cristina Ferreira

; Rocha, Adalgiza da Silva

; Suffys, Philip Noel

Memórias do Instituto Oswaldo Cruz

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Fev 2011, Volume 106 Nº 1 Páginas 09 - 15

Resumo: En | Texto: En | PDF: En

A cross-sectional analysis of stored Ziehl-Neelsen (ZN)-stained sputum smear slides (SSS) obtained from two public tuberculosis referral laboratories located in Juiz de Fora, Minas Gerais, was carried out to distinguish Mycobacterium bovis from other members of the Mycobacterium tuberculosis complex (MTC). A two-step approach was used to distinguish M. bovis from other members of MTC: (i) oxyR pseudogene amplification to detect MTC and, subsequently, (ii) allele-specific sequencing based on the polymorphism at position 285 of this gene. The oxyR pseudogene was successfully amplified in 100 of 177 (56.5%) SSS available from 99 individuals. No molecular profile of M. bovis was found. Multivariate analysis indicated that acid-fast bacilli (AFB) results and the source laboratory were associated (p < 0.05) with oxyR pseudogene amplification. SSS that were AFB++ SSS showed more oxyR pseudogene amplification than those with AFB0, possibly due to the amount of DNA. One of the two source laboratories presented a greater chance of oxyR pseudogene amplification, suggesting that differences in sputum conservation between laboratories could have influenced the preservation of DNA. This study provides evidence that stored ZN-SSS can be used for the molecular detection of MTC.

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10.

Container productivity, daily survival rates and dispersal of Aedes aegypti mosquitoes in a high income dengue epidemic neighbourhood of Rio de Janeiro: presumed influence of differential urban structure on mosquito biology
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David, Mariana Rocha

; Lourenço-de-Oliveira, Ricardo

; Freitas, Rafael Maciel de

Memórias do Instituto Oswaldo Cruz

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Set 2009, Volume 104 Nº 6 Páginas 927 - 932

Resumo: En | Texto: En | PDF: En

Different urban structures might affect the life history parameters of Aedes aegypti and, consequently, dengue transmission. Container productivity, probability of daily survival (PDS) and dispersal rates were estimated for mosquito populations in a high income neighbourhood of Rio de Janeiro. Results were contrasted with those previously found in a suburban district, as well as those recorded in a slum. After inspecting 1,041 premises, domestic drains and discarded plastic pots were identified as the most productive containers, collectively holding up to 80% of the total pupae. In addition, three cohorts of dust-marked Ae. aegypti females were released and recaptured daily using BGS-Traps, sticky ovitraps and backpack aspirators in 50 randomly selected houses; recapture rate ranged from 5-12.2% within cohorts. PDS was determined by two models and ranged from 0.607-0.704 (exponential model) and 0.659-0.721 (non-linear model), respectively. Mean distance travelled varied from 57-122 m, with a maximum dispersal of 263 m. Overall, lower infestation indexes and adult female survival were observed in the high income neighbourhood, suggesting a lower dengue transmission risk in comparison to the suburban area and the slum. Since results show that urban structure can influence mosquito biology, specific control strategies might be used in order to achieve cost-effective Ae. aegypti control.

4495 downloads Citado 1 vez em SciELO

11.

Genetic polymorphisms in vitamin D receptor, vitamin D-binding protein, Toll-like receptor 2, nitric oxide synthase 2, and interferon-γ genes and its association with susceptibility to tuberculosis
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Leandro, A.C.C.S.

; Rocha, M.A.

; Cardoso, C.S.A.

; Bonecini-Almeida, M.G.

Brazilian Journal of Medical and Biological Research

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Abr 2009, Volume 42 Nº 4 Páginas 312 - 322

Resumo: En | Texto: En | PDF: En

Mycobacterium tuberculosis kills more people than any other single pathogen, with an estimated one-third of the world's population being infected. Among those infected, only 10% will develop the disease. There are several demonstrations that susceptibility to tuberculosis is linked to host genetic factors in twins, family and associated-based case control studies. In the past years, there has been dramatic improvement in our understanding of the role of innate and adaptive immunity in the human host defense to tuberculosis. To date, attention has been paid to the role of genetic host and parasitic factors in tuberculosis pathogenesis mainly regarding innate and adaptive immune responses and their complex interactions. Many studies have focused on the candidate genes for tuberculosis susceptibility ranging from those expressed in several cells from the innate or adaptive immune system such as Toll-like receptors, cytokines (TNF-α, TGF-β, IFN-γ, IL-1b, IL-1RA, IL-12, IL-10), nitric oxide synthase and vitamin D, both nuclear receptors and their carrier, the vitamin D-binding protein (VDBP). The identification of possible genes that can promote resistance or susceptibility to tuberculosis could be the first step to understanding disease pathogenesis and can help to identify new tools for treatment and vaccine development. Thus, in this mini-review, we summarize the current state of investigation on some of the genetic determinants, such as the candidate polymorphisms of vitamin D, VDBP, Toll-like receptor, nitric oxide synthase 2 and interferon-γ genes, to generate resistance or susceptibility to M. tuberculosis infection.

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12.

Biological and genetic aspects of experimental hybrids from species of the Phyllosoma complex (Hemiptera: Reduviidae: Triatominae)
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Martínez-Ibarra, José Alejandro

; Ventura-Rodríguez, Luz Verónica

; Meillon-Isais, Karla

; Barajas-Martínez, Héctor

; Alejandre-Aguilar, Ricardo

; Lupercio-Coronel, Patricia

; Rocha-Chávez, Gonzalo

; Nogueda-Torres, Benjamín

Memórias do Instituto Oswaldo Cruz

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Mai 2008, Volume 103 Nº 3 Páginas 236 - 243

Resumo: En | Texto: En | PDF: En

The present work is a thorough investigation of the degree of reproductive isolation between Meccus mazzottii and Meccus longipennis, Meccus picturatus, Meccus pallidipennis and Meccus bassolsae, as well as between M. longipennis and M. picturatus. We examined fertility and segregation of morphological characteristics in two generations of hybrids derived from crosses between these species. The percentage of pairs with (fertile) offspring was highest in the set of crosses between M. longipennis and M. picturatus, and lowest between M. mazzottii and M. picturatus. Most first-generation (F1) individuals from crosses involving M. mazzottii were morphologically similar to this species, while only F1 x F1 progeny of parental crosses between M. mazzottii and M. longipennis had offspring second generation that looked like M. mazzottii. The results indicate that different degrees of reproductive isolation apparently exist among the species of the Phyllosoma complex examined in this study. The biological evidence obtained in this study does not support the proposal that M. longipennis and M. picturatus are full species. It could indicate on the contrary, that both could be considered as subspecies of a single polytypic species. On the other hand, biological evidence supports the proposal that M. mazzottii is a full species.

2937 downloads Citado 1 vez em SciELO

13.

Bat flies (Diptera: Streblidae, Nycteribiidae) parasitic on bats (Mammalia: Chiroptera) at Parque Estadual da Cantareira, São Paulo, Brazil: parasitism rates and host-parasite associations
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Bertola, Patrícia Beloto

; Aires, Caroline Cotrim

; Favorito, Sandra Elisa

; Graciolli, Gustavo

; Amaku, Marcos

; Pinto-da-Rocha, Ricardo

Memórias do Instituto Oswaldo Cruz

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Fev 2005, Volume 100 Nº 1 Páginas 25 - 32

Resumo: En | Texto: En | PDF: En

A total of 443 bat flies belonging to the families Nycteribiidae and Strelidae, were collected on 22 species of bats (Molossidae, Phyllostomidae, and Vespertilionidae) from Parque Estadual da Cantareira (São Paulo, Brazil), between January, 2000 and January, 2001. Eighteen new occurrences of bat flies were recorded on Anoura geoffroyi (Anastrebla caudiferae), Glossophaga soricina (A. caudiferae), Sturnira lilium (Trichobius phyllostomae, T. furmani, and Paraeuctenodes similis), Artibeus lituratus (A. caudiferae), A. fimbriatus (Megistopoda proxima), A. obscurus (Metelasmus pseudopterus), Myotis nigricans (M. proxima, M. aranea, Paratrichobius longicrus), M. ruber (Anatrichobius passosi, Joblingia sp.), M. levis (A. passosi), M. albescens (A. passosi, Basilia andersoni), and Histiotus velatus (M. aranea). Seven new occurrences were recorded for the state of São Paulo, increasing the range for T. tiptoni, T. furmani, M. proxima, Aspidoptera falcata, A. caudiferae, A. modestini and B. andersoni. The relationships between parasitism and host sex, reproductive stage, age hyperparasitism by fungi are discussed.

8053 downloads Citado 24 vezes em SciELO

14.

Proposta de questionário para caracterização da prevalência de sintomas digestivos nas doenças difusas do tecido conjuntivo
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Machado, Wellington M.

; Freire, Beatriz Funayama A.

; Rocha, Oswaldo M.

; Azambuja, Carlos Armando P.

; Oliveira, Maria Elisa C.

Arquivos de Gastroenterologia

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Mar 2004, Volume 41 Nº 1 Páginas 64 - 70

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

RACIONAL: As doenças difusas do tecido conjuntivo afetam vários sistemas orgânicos, inclusive o digestório. Neste, as lesões variam em intensidade e freqüência na dependência da doença envolvida. A descrição das diferentes manifestações digestivas tem sido pouco freqüente, pouco detalhada e, não raro, baseada em experiências individuais e levantamentos retrospectivos. Tais formas de registro de dados produzem resultados muitas vezes conflitantes entre as diferentes casuísticas. OBJETIVO: Estabelecer de forma mais consistente, por intermédio de entrevista e questionário predefinido de sintomas, o conjunto e freqüência dos sintomas digestivos observados na esclerose sistêmica progressiva, artrite reumatóide, polimiosite/dermatomiosite, doença mista do tecido conjuntivo e lúpus eritematoso sistêmico. PACIENTES E MÉTODO: Estudaram-se 99 pacientes, 90% mulheres, com idade média de 45 anos. Do total, 35 tinham artrite reumatóide, 26 esclerose sistêmica progressiva, 21 lúpus eritematoso sistêmico, 12 dermatomiosite/polimiosite e 5 doença mista do tecido conjuntivo. Todos foram submetidos, por investigador treinado, a entrevista e preenchimento de um questionário de sintomas digestivos, composto de 17 itens, previamente definidos. RESULTADOS: O estudo revelou elevada prevalência de sintomas gastrointestinais nas cinco doenças investigadas, muitas vezes afetando mais de 50% dos casos. Chamou a atenção a presença significativa de sintomas negligenciados pela literatura como a incontinência fecal. Discordante de trabalhos anteriores, os pacientes desta série com artrite reumatóide apresentaram variadas queixas digestivas, surpreendendo o achado de disfagia em 1/3 deles. CONCLUSÕES: As doenças difusas do tecido conjuntivo são causas de freqüentes e numerosos sintomas digestivos. O uso de questionários predefinidos mostrou-se instrumento válido na identificação de substancial número de sintomas, alguns deles ainda não referidos pela literatura. Por fim, foi constatada escassez de trabalhos passados e atuais relativos às manifestações gastrointestinais das doenças difusas do tecido conjuntivo, o que prejudicou análises comparativas mais amplas.

BACKGROUND: Connective tissue diseases may damage multiple organic systems, including digestive system. In this one, the degree of injury vary according to the associated disease. Despite the significant frequency of gastrointestinal involvement, there are few studies characterizing the prevalence of digestive symptoms in connective tissue diseases. Furthermore, most of the studies available are less detailed and based in personal experiences or reviews of records. AIM: To establish a reliable list of gastrointestinal symptoms found in the progressive systemic sclerosis, rheumatoid arthritis, polymyositis/dermatomyositis, mixed connective tissue disease and systemic lupus erythematosus, through a medical interview and a predefined questionnaire of symptoms. PATIENTS AND METHODS: There were studied 99 patients, 90% females, mean age 45 years. The whole group were composed of 35 rheumatoid arthritis, 26 progressive systemic sclerosis, 21 systemic lupus erythematosus, 12 polymyositis/dermatomyositis and 5 mixed connective tissue disease. Each patient was submitted to an interview with a well trainned doctor and answered a structured questionnaire, containing 17 questions. RESULTS: It was found a high prevalence of digestive symptoms in all five connective tissue diseases searched. Many of them were present in more than 50% of the patients. Called special attention the detection of some manifestations neglected by the literature like, for example, fecal incontinence. Also, disagreeing with other authors, was the finding of multiple gastrointestinal manifestations associated with rheumatoid arthritis. It was particularly surprising the occurrence of dysphagia in one third of the rheumatoid arthritis group. CONCLUSIONS: The connective tissue diseases are usual causes of many gastrointestinal complaints. The use of an interview plus predefined questionnaire seems a very effective way to identify and characterize symptoms and is even sometimes able to uncover features unknown before. Finally, the lack of studies, specially updated studies, did not allow more comprehensive comparisons.

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Reactivation of Chagas' disease successfully treated with benznidazole in a patient with acquired immunodeficiency syndrome
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Nishioka, Sérgio de A.

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; Rocha, Ademir

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Set 1993, Volume 88 Nº 3 Páginas 493 - 496

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