Results: 13

Ocotea pulchellaas an alternative against schistosomiasis: chemical analysis, development of nanoemulsion and biological control activity

The aim of this work was to evaluate the potential of the essential oil (EO) from Ocotea pulchella leaves as an alternative in the control of schistosomiasis. It was tested O. pulchella EO nanoformulation to assess its activity against adult Biomphalaria glabrata, their spawning and Schistossoma mansoni...

Development of a natural molluscicide prototype kit (MoluSchall) for the control of schistosomiasis mansoni transmission

Abstract INTRODUCTION In Brazil, Biomphalaria glabrata, B. tenagophila, and B. straminea are intermediate hosts of Schistosoma mansoni, the etiological agent of schistosomiasis mansoni. Molluscicide use is recommended by the WHO for controlling the transmission of this parasite. Euphorbia milii latex h...

Ortho-nitrobenzyl derivatives as potential anti-schistosomal agents

ABSTRACT In the search for new anti-schistosomal agents, a series of fifteen ortho-nitrobenzyl derivatives was assayed in vitro against both the schistosomulum (somule) and adult forms of Schistosoma mansoni. Compounds 8 and 12 showed significant activity against somules at low micromolar concentrations,...

Ultrastructural study of morphological changes in Schistosoma mansoni after in vitro exposure to the monoterpene rotundifolone

ABSTRACT INTRODUCTION: Schistosomiasis, a parasitic disease caused by trematode flatworms of the genus Schistosoma, affects more than 200 million people worldwide, and its control is dependent on a single drug, praziquantel. Here, we report the in vitro effect of rotundifolone, a monoterpene isolated f...

In vitro antischistosomal activity of venom from the Egyptian snake Cerastes cerastes

Abstract INTRODUCTION: We studied the potential in vitro antischistosomal activity of Cerastes cerastes venom on adult Schistosoma mansoni worms. METHODS: Live specimens of the horned viper snake, C. cerastes were collected from the Aswan Governorate (Egypt). Venom was collected from snakes by manual...

Atividade moluscicida de principios ativos de folhas de Lycopersicon esculentum cv. cereja em Biomphalaria glabrata (SAY, 1818)

A partir de po de folhas secas de tomateiro (Lycopersicon esculentum cv. Cereja) foram preparados extratos aquosos e alcoolicos. Por extracao metanolico e precipitacao alcalina, foi obtido um produto que denominamos "glicoalcaloide esteroidal bruto" (GEb), no qual, foi caracterizada a presenca de tomatin...

Activity of the artemether in experimental schistosomiasis mansoni

Mem. Inst. Oswaldo Cruz; 86 (supl.2), 1991
The action of the ether artemisinin (artemether) on Shistosoma mansoni in mice and the hansters experimentally infected with the LE strain was studied. In mice, the drugs showed high schistosomicidal activity using a single intramuscular dose of 100 mg/Kg/day. By the oral route, this dose showed a low ac...

Resistance of schistosomes to hycanthone and oxamniquine

Mem. Inst. Oswaldo Cruz; 84 (supl.1), 1989
Genetic crosses between phenotypically resistant and sensitive schistosomes demonstrated that resistance to hycanthone and oxamniquine behaves like a recessive trait, thus suggesting that resistance is due to the lack of some factor. We hypothesized that, in order to kill schistosomes, hycanthone and oxa...

Effects of irradiation and tunicamycin on the surface glycoproteins Schistosoma mansoni

Mem. Inst. Oswaldo Cruz; 84 (supl.1), 1989
The cercarial glycocalyx and schistosomulum surface contains a number of glycoproteins which are expressed in very variable amounts within a parasite population. Tunicamycin inhibits glycoprotein synthesis of schistosomula if the parasites are incubated for 24hr with the drug (10µg ml[raised to the powe...