Surat P Sinha

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Kala-azar, or visceral leishmaniasis, in India is generally assumed to be a result of infection with Leishmania donovani. 15 parasite isolates collected over the past 10 years from patients with classical disease were typed by monoclonal antibodies, isoenzymes, and kDNA analysis. 4 were shown to be L tropica, a species historically associated with cutaneous(More)
The no-effect limit dose (NELD) of three commonly used pesticides with respect to their cytogenetic toxicity was determined in a number of test systems using a sufficient number of lower doses to characterize the dose-effect relationship. For lindane, malathion and metacid, this dose was 3.2, 7.0 and 3.0 mg/litre, respectively, for mitosis inhibition and(More)
Ochratoxin (1 microgram/kg body weight/day), when administered orally daily to albino Swiss mice for 14 continuous days, increased the incidence of abnormalities in mitotic and meiotic metaphase chromosomes, and the gross morphology of the sperm head; the sperm count per unit volume of caput epididymal suspension also decreased. These genotoxic effects were(More)
Young weaning Swiss albino mice were orally administered crude aflatoxin B1 in a dose mimicking human exposure condition, i.e. at 0.05 micrograms/kg body weight/day for 14 weeks. Vitamin A (retinol) was orally administered along with the toxin in double (132 IU/kg body wt/day) the human equivalent therapeutic dose. The results suggested that vitamin A(More)
Genotoxic effect of agriculture-used concentration of organophosphorous pesticide, Malathion, is decreased by the dietary concentration of sodium salt of L-ascorbic acid for parameters like mitotic-index and clastogeny in onion root-tip cells, clastogeny and meiotic-index in mice, and lethal mutation rate in Drosophila melanogaster. The vitamin itself is(More)
Concurrent administration for one week of vitamins B-Complex (0.3 ml of 1% Polybion) or ascorbic acid (0.25 ml of 1% Redoxon, to 8-week old albino swiss mice, Mus musculus along with organophosphorous pesticide Malathion or carbamate pesticide Rogor (both 1 microliters/kg b.wt.) could significantly decrease the chromosome-clastogeny rate induced by the(More)
Ochratoxin A (OA), when administered orally daily for 45 days to albino Swiss mice, Mus musculus, at a level equivalent to the human dietary concentration of 1 microgram/kg body weight/day, increased the production of abnormalities in both mitotic and meiotic chromosomes as well as in the gross morphology of the sperm head. The sperm count per unit volume(More)
Vitamin C, when administered concurrently with a pesticide (endosulfan, phosphamidon or mancozeb), could significantly decrease the frequency of pesticide-induced clastogenic and mitosis-disruptive changes in the bone marrow cells of young Swiss albino mice. Of the three doses (10, 20 or 40 mg/kg b.wt./day) of the vitamin, the one which is double the human(More)
The effect of vitamin C on the genotoxicity of three pesticides (Endosulfan, Phosphamidon, Mancozeb) was monitored by screening meiotic (metaphase I) chromosomes in the primary spermatocytes of Swiss albino mice, Mus musculus. A dose-dependent amelioration by vitamin C was observed in the Phosphamidon-treated group where quadruple the therapeutic dose(More)