The situation of liver fluke infestation in cattle in Bali.

From 1975 to 1982, the prevalence of liver fluke infestation in Bali cattle of the island of Bali, Indonesia varied between 29% and 46%, and from 1983 to 1988 prevalence rates varied between 6% and 22%. Changes in prevalence rates were more closely associated with water levels in pastures than with other variables in pastures, such as temperatures and pH. Mass-fasciolicide treatment of traditionally reared Bali cattle was economical. The decrease in the prevalence of liver flukes in Bali cattle since 1983 was associated with (1) the introduction of a rice planting system which alternated rice with other crops, and (2) with mass-fasciolicide treatments conducted by the veterinary services.