Strain variation in the infectivity of Schistosoma mansoni for Biomphalaria glabrata.
نویسندگان
چکیده
It is well known that geographic strains of MATERIALS AND METHODS schistosomes vary in infectivity for their host snails2 6 . l Z z 2 . This is of importance not only for Snail Strains. the introduction of schistosomes into previously uninfected areas, but because of the potential for the spread of drug resistant strains of worms. B. glabrata, an albino strain of Puerto Rican origin, has been maintained continuously in la-
منابع مشابه
Studies on host-parasite relationship between the Puerto Rican strain of Schistosoma mansoni and Biomphalaria snails.
Immunoelectrophoretic studies on common antigenicities were carried out by using rabbits sera immunized with the Puerto Rican strain of Schistosoma mansoni adult worms or eggs and antigens of several adult Biomphalaria snails and vice versa. As the result, S. mansoni adult worm extracts produced 8 bands both with extracts of Biomphalaria glabrata pigmentation and B. glabrata pigmentado, 3 to 4 ...
متن کاملVariation in expression of Biomphalaria glabrata SOD1: a potential controlling factor in susceptibility/resistance to Schistosoma mansoni.
The snail Biomphalaria glabrata kills the blood fluke Schistosoma mansoni by a mechanism involving production of hydrogen peroxide, the enzymatic product of cytosolic Cu/Zn superoxide dismutase (SOD1). This enzyme exhibits higher activity in blood cells (hemocytes) from a predominantly resistant strain of B. glabrata than in hemocytes from a susceptible strain. Additionally, B. glabrata SOD1 po...
متن کاملMulti-parasite host susceptibility and multi-host parasite infectivity: a new approach of the Biomphalaria glabrata/Schistosoma mansoni compatibility polymorphism.
In this study, we analyze the degree of susceptibility/un-susceptibility of five strains of Biomphalaria glabrata from different geographical origins successively challenged with a panel of 4 Schistosoma mansoni strains. A total of 20 homopatric and heteropatric host-parasite combinations were tested with exposure doses of 1, 10, 20, 30 and 50 miracidia per individual host. By doing this, we ch...
متن کاملA comparative parasitologic study on Biomphalaria glabrata snail and C3H/He mice infected with human and murine isolates of Schistosoma mansoni derived from Sumidouro, Rio de Janeiro, Brazil.
Experiments were carried out to analyze the biological characteristics of two sympatric isolates of Schistosoma mansoni derived from humans and murines in a low endemic transmission area (Sumidouro county, state of Rio de Janeiro, Brazil). Sympatric reared-laboratory Biomphalaria glabrata and C3H/He mice were used as experimental hosts. Parameters assessed comprised: precercarial period, infect...
متن کاملObservations on the miraxonal attraction exercised by sexually immature or adult Biomphalaria glabrata infected or not by Schistosoma mansoni Observações sobre a atração miraxonal exercida por Biomphalaria glabrata infantil e adulta, infectada ou não por Schistosoma mansoni
Objective The influence of age and the presence of secondary sporocysts in the miraxonal attraction exercised by Biomphalaria glabrata on miracidia of Schistosoma mansoni of the BH strain were studied. Material and Method A glass apparatus containing two compartments joined by a tube and previously tested in other experiments, was used. Specimens of B. glabrata or its snail conditioned water (S...
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ورودعنوان ژورنال:
- Revista do Instituto de Medicina Tropical de Sao Paulo
دوره 30 2 شماره
صفحات -
تاریخ انتشار 1988