Ocorrência de vetores da esquistossomose mansônica no litoral norte do Estado de São Paulo, Brasil

Teles, Horacio Manuel Santana; Hiramoto, Roberto Mitsuyoshi; Oliveira, João Carlos Nascimento de; Aveiro, José Antônio de

doi:10.1590/s0102-311x2003000600034

Cited by 9 publications

(10 citation statements)

References 5 publications

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“…This finding confirms the predominance of B. tenagophila in the region, corroborating malacological surveys previously carried out in the same municipalities (Contino 2004, Teles et al 2003, SUCEN 2005.…”

Section: Resultssupporting

confidence: 91%

“…It is probably during these months that the snail population disperses to new environments. In this study we identified 204 specimens of B. straminea in the Barra Velha stream in Ilhabela (Figure 2), where previous malacological surveys had identified B. tenagophila and B. straminea living in sympatry (Teles et al 2003). Our results corroborate the finding that B. straminea has a high potential for invading and rapidly colonizing new habitats, as described in studies carried out in Asia (Yipp 1990, Atwood et al 2014) and on islands in the Caribbean (Pointier 1993).…”

Section: Resultssupporting

confidence: 88%

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The current distribution pattern of Biomphalaria tenagophila and Biomphalaria straminea in the northern and southern regions of the coastal fluvial plain in the state of São Paulo

et al. 2015

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We analyze the current distribution of snails from genus Biomphalaria in the north and south of the coastal fluvial plain in the state of São Paulo, which is part of a large coastal floodplain. Data from twenty-nine collection sites confirmed that the freshwater body in both regions is colonized by Biomphalaria tenagophila and Biomphalaria straminea, which are natural intermediate hosts of Schistosoma mansoni. The abundance of B. straminea in collection sites where only B. tenagophila had previously been recorded indicates the potential for B. straminea to expand in the region. While quantitative analysis of the number of specimens per species showed that local growth of B. tenagophila populations occurs during periods with little rainfall, there is a greater risk of B. tenagophila populations spreading between different water bodies during rainy periods, when heavy rainfall results in water levels rising in the main rivers and flooding caused by water flowing from the Serra do Mar mountain range to the coastal plain. The temperature increase caused by global climate changes and the consequent increasing frequency of high-water levels and floods can be expected to affect the distribution of these snails on the coastal fluvial plain, leading to the risk of a change in the autochthonous transmission pattern of schistosomiasis in the region.

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Section: Resultssupporting

confidence: 91%

Section: Resultssupporting

confidence: 88%

The current distribution pattern of Biomphalaria tenagophila and Biomphalaria straminea in the northern and southern regions of the coastal fluvial plain in the state of São Paulo

et al. 2015

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“…In the São Paulo State, schistosomiasis is still a public health problem 33,39 . Biomphalaria tenagophila is the second most important specie related to the transmission of schistosomiasis in Brazil and in São Paulo State it is the most important intermediate host 36 .…”

mentioning

confidence: 99%

Schistosoma mansoni and other larval trematodes in Biomphalaria tenagophila (Planorbidae) from Guarulhos, São Paulo State, Brazil

Moraes

Silva

Ohlweiler

et al. 2009

Rev. Inst. Med. trop. S. Paulo

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suMMaryA total of 909 Biomphalaria tenagophila were collected from two areas in Guarulhos (Metropolitan area of São Paulo, São Paulo State, Brazil) to assess larval trematode infections. In all collection sites, only this species was found and 183 (20.13%) harbored trematode infections. In these collections, four morphologically distinguishable types of cercariae were identified by confocal microscopy. Xiphidiocercaria (Cercaria lutzi) was the most common type of cercaria recovered, contributing 76.5% of all infections. Schistosoma mansoni cercariae were recovered and comprised the total of 13.11%. Strigea cercaria (Cercaria caratinguensis) and Brevifurcate pharyngeate Clinostomatoide cercaria (Cercaria ocellifera) contributed 8.33% and 2.22% of all infections, respectively. Double infections (S. mansoni and C. lutzi) were found in twelve snails, contributing 6.55% of all infections. In all sites studied, small vertebrates were found in snail habitats and it was observed human contact with the water. The presence of trematode infected snails in large cities has public health implications. It further provides a starting point for some comprehensive studies on snail-related aspects of transmission and biology of trematode of medical and veterinary importance.

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“…Counts greater than 800 EPG were found in two cases. These values are usually associated with serious organic complications 1,10,16 . However, the clinical examination files kept in our epidemiological databases did not indicate any abnormality recognizable as pertaining to moderate or severe forms of schistosomiasis.…”

Section: Resultsmentioning

confidence: 99%

“…In Bananal, as well as in other municipalities of the state of São Paulo, besides the increased attention on the part of the health authorities, the success of the prophylactic plans was due to a gradual improvement in environmental salubriousness associated with some social and economical progress among the local inhabitants. The improvements in standard of living pointed toward lower prevalence and lower worm burdens and, therefore, a predominance of asymptomatic cases 10 . In mid-1997, the Government of the state of São Paulo decided on a new policy: to design a specific plan to intensify the control of schistosomiasis.…”

Section: Introductionmentioning

confidence: 99%

Assessment of control and epidemiologic details of the schistosomiasis mansoni in Bananal, São Paulo, Brazil

Teles

Ferreira

Carvalho

2014

Rev. bras. epidemiol.

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AbstrAct:The purpose of our study in the municipality of Bananal, state of São Paulo, Brazil, was to stop the transmission of schistosomiasis mansoni. Particular emphasis was given to such items as the active surveillance and eventual treatment of hosts, mapping parasite foci, and increasing the extent of basic sanitation in the municipality. Now, our records indicate that the eradication of schistosomiasis in the municipality of Bananal is attainable. However, as the vector Biomphalaria tenagophila can still be found in some water bodies within this municipality, it remains included in the area where schistosomiasis is endemic, which calls for very strict measures to avoid the human cases of schistososomiasis. The expansion of the coverage of the basic sanitation network and treatment of Schistosoma mansoni cases diagnosed during periodic surveys are part of the plans to eradicate schistosomiasis in Bananal.

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Ocorrência de vetores da esquistossomose mansônica no litoral norte do Estado de São Paulo, Brasil

Cited by 9 publications

References 5 publications

The current distribution pattern of Biomphalaria tenagophila and Biomphalaria straminea in the northern and southern regions of the coastal fluvial plain in the state of São Paulo

The current distribution pattern of Biomphalaria tenagophila and Biomphalaria straminea in the northern and southern regions of the coastal fluvial plain in the state of São Paulo

Schistosoma mansoni and other larval trematodes in Biomphalaria tenagophila (Planorbidae) from Guarulhos, São Paulo State, Brazil

Assessment of control and epidemiologic details of the schistosomiasis mansoni in Bananal, São Paulo, Brazil

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