Intestinal parasites in Lebanon.
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The prevalence of intestinal protozoal and helminthic infection was studied over a period of one year amongst 297 school children, aged 5-20 yr in a sub-urban area. The overall prevalence rate of various protozoal infection, 15.82 per cent had only helminthic infection and 14.47 per cent had combined helminthic and protozoal infection. Ascaris lumbricoides infestation was found to be the commonest helminthic infection (61.70%) while giardiasis was the commonest protozoal infection (59.80%). The prevalence rates, one year after effective anti-protozoal and antihelminthic treatment was administered, were overall parasitic infection 25.92 per cent; only protozoal infection 17.50 per cent, only helminthic infection 5.72 per cent and combined infection 2.69 per cent. The reinfection rate was found to be 7.40 per cent and the fresh infection rate was found to be 11.4 and 39.8 per cent at the end of six months and one year respectively.
Eight gastro-intestinal tracts of Cercopithecus mitis labiatus from Karkloof, Natal, and 121 fecal samples from C. m. erythrarchus from Cape Vidal, Natal, were examined for helminth parasites and/or their eggs. Fecal samples from six of the C. m. labiatus were examined for protozoan cysts. Five protozoon and six helminth species were identified from C. m labiatus. Most adult worms occurred in the caecum and colon, gut regions which also contained the highest volatile fatty acid levels. The eggs of nine helminth species were recovered from C. m. erythrarchus fecal samples; protozoans were not looked for in these samples.
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