50 Fish Nutrition and Feed Technology- ICAR JRF/SRF 2024 MCQ (Single Correct) +4 −1 Noncytochrome oxidase - containing Gram - negative bacteria pathogenic for fish A Edwardsiella tarda Correct Incorrect B Yersinia ruckeri Correct Incorrect C Flavobacterium columnaris Correct Incorrect D 182 Correct Incorrect Check Answer EXPLANATION Functional Feeds, Probiotics, Prebiotics, Synbiotics and Gut Microbiome Modulation Cytochrome Oxidase-Negative Fish Pathogens:Bacterial fish pathogens belonging to the family Enterobacteriaceae are characteristically Gram-negative, facultatively anaerobic rods that are cytochrome oxidase-negative:Edwardsiella tarda (1): Oxidase-negative (causes edwardsiellosis / emphysematous putrefactive disease).Yersinia ruckeri (2): Oxidase-negative (causes enteric redmouth disease in salmonids).In contrast, Flavobacterium columnare is oxidase-positive.Both 1 and 2 are oxidase-negative pathogens.Correct Option: Option 4 (1 & 2). Explanation not matching this question? क्या व्याख्या इस प्रश्न से मेल नहीं खा रही? Report Mismatch त्रुटि बताएं Prev Next