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On the finding of Biomphalaria tenagophila naturally infected with Schistosoma mansoni in the State of Minas Gerais, Brazil.
Natural infection in Biomphalaria tenagophila with Schistosoma mansoni was observed for the first time in a small area in Jaboticatubas, in the State of Minas Gerais, Brazil, since B. glabrata has been known as the vector snail of schistosomiasis in that State. Expand
Oogram studies in mice infected with Schistosoma mansoni and treated with dexamethasone.
The hypothesis of a partial blockade of the egg excretion in immunosuppressed mice is reinforced, as all stages of viable eggs were observed in the tissues of treated and control mice. Expand
Are there interactions between schistosomes and intestinal nematodes?
A survey for intestinal parasites was carried out in a homogenous rice cultivation area, in which people had equal opportunities of acquiring the local endemic helminthiases, including schistosomiasis mansoni, and egg counts were positively correlated with ancylostome infection but inversely correlated with A. lumbricoides and T. trichiura. Expand
Antischistosomal activity of acridanone-hydrazones in Cebus monkeys experimentally infected with the SJ strain of Schistosoma mansoni.
The perfusion undertaken after killing the animals showed absence of worms in the treated monkeys, whereas 83 worms were recovered from the control, thus corroborating the results obtained by means of oograms and coproscopy, and confirm the efficacy of 9-acridanone-hydrazones previously tested against the LE strain of S. mansoni. Expand
Activity of 9-acridanone-hydrazone drugs detected at the pre-postural phase, in the experimental schistosomiasis mansoni.
The compound Ro-15.5458/000, derivative in the class of 9-acridanone-hydrazones, was found to be effective against Schistosoma mansoni in mice, killing almost all the skin schistosomules (24 hr afterExpand
Susceptibility to Leishmania mexicana of mice infected with schistosoma mansoni.
Predation of Biomphalaria glabrata during the development of Belostoma anurum (Hemiptera, Belostomatidae).
The higher predation in phase I suggested the sexual maturation of the belostomatid, which was reared under laboratory conditions and exposed to semi-natural conditions of photo period. Expand
Schistosoma mansoni: biochemical evidence for morphogenetic change from cercaria to schistosomule.
Analysis of samples of schistosomule-like preparations obtained by centrifuging cercariae at room temperature revealed that many of the organisms were PAS negative and water sensitive, and showed no localized staining with alizarin and no tendency to form Cercarienhullen Reaktion (envelopes) in immune human sera. Expand
A new approach for screening prophylactic agents in schistosomiasis.