Control of fasciolosis in stall-fed buffaloes by managing the feeding of rice straw.

Fasciolosis, caused by Fasciola gigantica, presents major disease and production problems, particularly in the rice producing areas of South and South-East Asia. In Nepal, buffaloes are commonly stall-fed and the most usual fodder is rice straw, which is produced in large quantities in the area. Here we describe a relatively simple way of controlling fasciolosis in these animals. We demonstrate that infectious metacercariae of F. gigantica are concentrated in the bottom part of the rice straw and that infection can be controlled by cutting the rice straw in half, and then feeding the parasite free top half of the straw first. The bottom part of the rice straw should ideally be stored for at least 4 months after harvest to allow the parasites to die before it is used as fodder.