Abstract
Effects of thermal conditions on CHV infection were investigated both in vitro and in vivo. CHV multiplied in FHM cells at incubation temperatures from 10°C to 25°C, but not at 30°C, optimal temperature being 15-20deg;C. Experimental infection of CHV was done on carp fry under controlled water temperatures of 15, 20 and 25°C. The mortality of carp fry due to CHV infection was markedly high at 15°C and decreased with the increase in water temperature. A papilloma was formed after 11 weeks at all temperatures tested.
A regression of the papilloma was observed by shifting water temperature from 7.5°C to 20, 25 and 30°C but no regression of papilloma was observed by the shift of water temperature from 7.5°C to 15°C.
