Abstract:This study was accomplished on school children with the objective to define the prevalence of intestinal helminth parasites. A total of 3000 of stool samples were randomly collected from children of five schools in Rangeli municipality and were examined by a routine by saline and smear techniques. 83.3% stool samples were infected with helminth parasites. The prevalence rate of intestinal parasites was Ascaris lumbricoides (50.92%); Ancylostoma duodenale (44.56%); Trichuris trichiura (1.96%); Enterobius vermicularis (1.44%); Hymenolepis nana (1.12%). The lack of safe drinking water, food, poverty, unhygienic practices and poor environmental condition were found to be contributing factors in the maintenance of high prevalence rate of intestinal parasites infections. Parasites control programs with hygienic practice and improvement of environmental conditions along with the treatment of infected peoples may be helpful in reducing the burden of helminth intestinal parasites in children. Hygienic conditions benefit people at personal and community level and, ultimately contributes to promoting the health status of people.

Abstract:In the present study, twenty six species of fishes were recorded from Singhiya river, Morang district, Nepal during January to August (2016). The population present status of important fish species such as Gagata cenia and Lepidocephalus guntea was found to be threatened. Macrognathus pancalus and Mystus bleekeri was to be vulnerable and Glossogobius giuris and Puntius sarana to be intermediate. The Singhiya river have been found to be influenced by harmful human activities such as deforestation, direct waste disposal, discharge of toxic substances-fertilizers, pesticides through surface run-off from the agricultural field near the river and urbanization, industrialization, use of soaps and detergents, indiscriminate fishing, pollution, waste dumping are destroying the fresh water habitat and have been found to threaten the natural environment of fish diversity of Singhiya river which ultimately lead to their extinction and must be stopped or managed in a proper way for the conservation and sustainable utilization of aquatic-bioresources of the river.

Forty eight fish species were collected in the present study. The population status of important fishes Chagunius chagunio and Channa striatus were found to be threatened. Mastacembulus puncalus was vulnerable and Clupisoma garua and Puntius ticto threatened because of pollution.