Clinical and pathological investigations in ulcer disease of Cyrinus carpio caused by Aeromonas hydrophila

Abstract

The Indian carps are the most important food fishes and they have a considerable economic impact on the country's economy. In several parts of the country, they are widely cultivated. The Indian Major Carps include the Catla catla, Labeo calbasu, Cirrhinus mrigala, and Labeo rohita, to name a few species. The fish Cyprinus carpio, both in the wild and in captivity, is vulnerable to Aeromonas hydrophila infections. Investigations carried out on Cyrinus carpio to better understand the implications of a pathogenic Aeromonas hydrophila isolates impacts on fish health revealed that the pathogen affects severely. The fish species that were injected with the bacterial suspension developed lesions of a similar nature, and dead fishes with ulcers on their bodies were found in all of the tanks. Even after 15 days of incubation and observation, no difference was observed in the fishes in the control group of fishes. Despite this, not all of the fish who got ulcers perished. Healing has been shown in some fish that had small ulcers, according to the research. Cyprinus carpio injected with a mixed bacterial suspension of AH-04 and AH-07 recorded a death rate was 65.0 percent.