Foco de doença de Chagas em Arcádia, estado do Rio de Janeiro, Brasil

Lorosa, Elias Seixas; Valente, Márcio Valério Monteiro Pinto; Cunha, Vanda; Lent, Herman; Jurberg, José

doi:10.1590/s0074-02762003000700004

Cited by 16 publications

(9 citation statements)

References 11 publications

(8 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The triatomine T. vitticeps, responsible for over 95% of the domiciliary invasions in the study area, is classified as an essentially sylvatic species whose adults are occasionally found in human dwellings, apparently being incapable of colonizing them (Zeledó n, 1976). Nevertheless, sylvatic adults are in fact frequently found in anthropic habitats, and there are also records of temporary household colonies (Lorosa et al, 2003;Santos et al, 2005;Souza et al, 2008). This species is a strong flier and able to travel long distances, mainly with wind assistance (Gonçalves et al, 1998).…”

Section: Discussionmentioning

confidence: 99%

Influence of the landscape on dispersal of sylvatic triatomines to anthropic habitats in the Atlantic Forest

Leite¹,

Santos

Falqueto

2010

Journal of Biogeography

View full text Add to dashboard Cite

Aim The aim of this study was to test the hypothesis that the dispersal of sylvatic triatomines to anthropic habitats is stimulated by degradation of their natural habitat.Location State of Espírito Santo, south-eastern Brazil.Methods We georeferenced records of domiciliary captures of sylvatic triatomines (1996)(1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004)(2005) obtained from the database of the entomological surveillance programme of the Brazilian National Health Foundation. We partitioned the study area into 543 equal hexagons and attributed information on the presence/absence of triatomines and climatic, topographic and biological variables to each. Using generalized additive models (GAMs), we defined the determinant variables for triatomine presence/absence and demarcated the potential areas in which they might occur. We then subjected the hexagons with a high probability of triatomine presence to a second analysis, adding information on the number of domiciliary captures of triatomines and landscape indices that measured quantitative and spatial patterns of forest fragments. We used GAMs to determine the indices that influenced the number of domiciliary captures of triatomines. ResultsThe presence of triatomines was characterized by a strong positive correlation with variability of terrain slope. This variable was used to demarcate the areas where triatomines were likely to occur. Landscape indices associated with the number of domiciliary captures of triatomines were the number of patches, the fractal dimension index, the total core area and the clumpiness index. Main conclusionsOur results do not support the hypothesis that domiciliary invasion by sylvatic triatomines is stimulated by environmental degradation. Instead, the results suggest that less degraded areas maintain larger populations of triatomines and consequently present higher indices of dispersal and domiciliary invasion. Particular landscape patterns and dispositions of human dwellings, however, may enhance the probability of triatomines being attracted to the artificial light of dwellings. Initiation of flight and consequent dispersal is a naturally occurring process that allows triatomines to find and colonize areas that favour the survival of their offspring.

show abstract

Section: Discussionmentioning

confidence: 99%

Influence of the landscape on dispersal of sylvatic triatomines to anthropic habitats in the Atlantic Forest

Leite¹,

Santos

Falqueto

2010

Journal of Biogeography

View full text Add to dashboard Cite

show abstract

“…Therefore, CD autochthonous cases in RJ were not fully recognized. However, over the past few years, focus of CD had occurred in rural areas of RJ where specimens of T. vitticeps were collected inside houses [ 22 , 23 ]. Human cases of CD were identified in these locations, calling attention to the possible vectorial transmission of the disease in this state.…”

Section: Introductionmentioning

confidence: 99%

Autochthonous transmission of Chagas disease in Rio de Janeiro State, Brazil: a clinical and eco-epidemiological study

et al. 2015

View full text Add to dashboard Cite

BackgroundAfter the control of the main modes of Chagas disease (CD) transmission in most endemic countries, it is important to identify the participation of native sylvatic vectors in CD transmission. Although CD is not considered endemic in Rio de Janeiro State (RJ), Brazil, we identified patients with CD born in RJ and investigated the possible autochthonous transmission in the state.MethodsPatients born in RJ and followed in our institution between 1986 and 2011 were retrospectively analyzed. The cases identified as autochthonous transmission were submitted to epidemiological, clinical, serological, parasitological and molecular studies. Sectional field study with serological survey, research of sylvatic reservoirs and vectors was conducted in rural areas where patients were born.ResultsAmong 1963 patients, 69 (3.5%) were born in RJ. From these, 15 (21.7%) were considered to have acquired the infection by autochthonous transmission. Cardiac form was the commonest form of presentation (60%). In rural areas in RJ northern region, sylvatic cycles of Trypanosoma cruzi and domestic invasion by Triatoma vitticeps were identified, and CD prevalence among inhabitants was 0.74%.TcI genotype was identified in sylvatic reservoirs and vectors. The genotype (mixed infection TcI/TcVI) could be identified in one of the autochthonous cases.ConclusionsThe autochthonous vectorial transmission of CD occurs in RJ, probably due to wild cycles of T. cruzi and sylvatic vectors, such as T. vitticeps. Therefore, the health authorities should evaluate if RJ should be included in the original endemic area of CD and CD should be included in the diagnostic work out of cardiomyopathy of patients born in RJ. Moreover, control and educational measures should be put into place in the risk areas.

show abstract

“…The late diagnosis of acute CD in this case is at least in part due to the fact that CD was never considered endemic in RJ. There are few reports of domiciled triatomines in RJ but the domestic invasion of human habitations by sylvatic triatomines is frequent 2 , 7 , 8 , 11 , 13 , 14 , 21 . Although domestic invasion by T. tibiamaculata in RJ is very rare, this triatomine has been found frequently inside homes in the Bahia State 6 , 10 .…”

Section: Discussionmentioning

confidence: 99%

“…Although the prevalence of CD has decreased in the last decades, a recent meta-analysis estimated CD prevalence in Brazil to be near 2.4% or about 4.6 million Brazilians infected by T. cruzi 15 . However, other transmission mechanisms may keep CD as a public health problem such as the ingestion of food contaminated with T cruzi , causing outbreaks of acute CD and transmission by native vectors in different areas of Brazil 1 , 3 , 5 , 12 , 14 , 21 , 22 , 23 , 27 , 28 .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

First Report of Acute Chagas Disease by Vector Transmission in Rio De Janeiro State, Brazil

Sangenis

Sousa

Silva

et al. 2015

Rev. Inst. Med. trop. S. Paulo

View full text Add to dashboard Cite

SUMMARYChagas disease (CD) is an endemic anthropozoonosis from Latin America of which the main means of transmission is the contact of skin lesions or mucosa with the feces of triatomine bugs infected by Trypanosoma cruzi. In this article, we describe the first acute CD case acquired by vector transmission in the Rio de Janeiro State and confirmed by parasitological, serological and PCR tests. The patient presented acute cardiomyopathy and pericardial effusion without cardiac tamponade. Together with fever and malaise, a 3 cm wide erythematous, non-pruritic, papule compatible with a "chagoma" was found on his left wrist. This case report draws attention to the possible transmission of CD by non-domiciled native vectors in non-endemic areas. Therefore, acute CD should be included in the diagnostic workout of febrile diseases and acute myopericarditis in Rio de Janeiro.

show abstract

Foco de doença de Chagas em Arcádia, estado do Rio de Janeiro, Brasil

Cited by 16 publications

References 11 publications

Influence of the landscape on dispersal of sylvatic triatomines to anthropic habitats in the Atlantic Forest

Influence of the landscape on dispersal of sylvatic triatomines to anthropic habitats in the Atlantic Forest

Autochthonous transmission of Chagas disease in Rio de Janeiro State, Brazil: a clinical and eco-epidemiological study

First Report of Acute Chagas Disease by Vector Transmission in Rio De Janeiro State, Brazil

Contact Info

Product

Resources

About