schistosoma japonicum in the black rat, rattus rattus mindanensis, from leyte, philippines in relation to oncomelania snail colonies with reference to other endoparasites.this study examined the prevalence of schistosoma japonicum infections in field rats, rattus rattus mindanensis, according to different trapping locations. between october 1995 and january 1996, traps were set in the municipality of palo, leyte, philippines to determine the correlation of rats infected with schistosomiasis to the proximity of the intermediate snail host, oncomelania hupensis quadrasi, colonies. of the 22 rats that were caught within a snail colony, 21 (95.5%) were positive for s ...199910774707
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