Isolation and Molecular Characterization of Bacterial Pathogens Infecting Goldfish (Carassius auratus)
Abstract
Bacterial infections are prevalent among ornamental fishes and are mainly caused by gram-negative bacteria, that cause significant economic losses in aquaculture and the ornamental fish trade.The present study aimed to isolate, screen, and molecularly characterize the bacterial pathogens associated with infected goldfish.Infected goldfish were collected from aquarium shops in Chackai, Trivandrum.Pathogens were characterised morphologically and biochemically.Molecular identification of two isolates was performed by 16S rRNA gene sequencing and identified as Flavobacterium columnare and Streptococcus iniae.The isolates are pathogenic bacteria that cause columnaris disease, skin and gill lesions, fin rot, meningitis and death.
Fields of Study & Subjects
Aquaculture disease management and microbiota
Fish Biology and Ecology Studies
Bacterial Identification and Susceptibility Testing
Publication details
- Journal / source
- International Journal of Zoological Investigations
- Volume
- 12
- Issue
- 1
- Pages
- 350–357
- Publication date
- 16 March 2026
- Language
- EN