Potencialidade de Biomphalaria tenagophila do lago Pampulha, Belo Horizonte, MG, como hospederia do Schistosoma mansoni

Abstract

Biomphalaria tenagophila snails, from a population originally obtained from "Pampulha" lake, Belo Horizonte, Minas Gerais State, Brazil, were exposed to miracidia from four strains of Schistosoma mansoni: "LE" and "HK" from Belo Horizonte, "AL" from Alagoas and "SJ" from São José dos Campos, São Paulo. The "LE", "AL" and "SJ" strains are maintained in the laboratory and the "HK" strain was obtained from feces of a patient residing near to "Pampulha" lake. Infection rates were of 4% ("LE" strain), 6% ("HK" strain), 30% ("SJ" strain) and 40% ("AL" strain). These infection rates were similar to those obtained by others authors for B. tenagophila from Minas Gerais. Experimentally infected snails when compared to B. glabrata of the control group and B. tenagophila naturally infected in "Pampulha" lake shed similar number of cercariae (2000 cercariae/snail). The high density of B. tenagophila in the "Pampulha" lake, the number of cercariae shed by naturally infected snails, the great number of persons who use the water for fishing and swimming, and the water contamination with human feces, are favourable factors for growing the Schistosomiasis focus in the lake.

<![CDATA[<B><I>Biomphalaria tenagophila </I>potencial vector of <I>Schistosoma mansoni</I> in the Paran� River basin (Argentina and Paraguay)</B>]]>

“…This compatibility (Class III with SJ strain) is similar to that reported in B. tenagophila from Pampulha Lake in Belo Horizonte (Minas Gerais, Brazil) by Souza et al (1995). Snails of that species naturally infected with S. mansoni were already found in several opportunities in the Pampulha Lake (Souza et al 1987).…”

Diversity of Freshwater Mollusks from Lake Pampulha, Municipality of Belo Horizonte, Minas Gerais, Brazil

“…Biomphalaria straminea was first reported at Lake Pampulha in the 1980s, subsequently serially replacing other predominant snail species that are intermediate hosts of S. mansoni, such as B. glabrata and B. tenagophila [73]. To date, B. straminea has not yet been found naturally infected with S. mansoni at Lake Pampulha, but the species B. glabrata and B. tenagophila were [10][11][12]14,61,62,75].…”

ALTERAÇÕES TEGUMENTARES EM DUAS DIFERENTES LINHAGENS DE Schistosoma mansoni SUBMETIDAS A TRATAMENTO COM ARTEMISININA E ÁCIDO ARTESÚNICO

“…Cercariae of BH (Belo Horizonte, Minas Gerais, -19°55'15''/-43°56'16'', Brazil) and SJ (São José dos Campos, São Paulo, -23°10'46''/-45°53'13'', Brazil) strains of S. mansoni were obtained from the infection of two species of mollusc, Biomphalaria glabrata and B. tenagophila, respectively, the former being sympatric with the first strain and the latter, with the second strain. As suggested by Souza et al (1987), the molluscs were kept at the Department of Animal Biology -Institute of Biology -Unicamp. Swiss female mice (Mus musculus), provided by the Multidisciplinary Centre for Biological Investigation -Unicamp, were used as definitive hosts.…”