Journal
INTERNATIONAL JOURNAL OF FOOD MICROBIOLOGY
Volume 98, Issue 2, Pages 131-134Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ijfoodmicro.2004.05.017
Keywords
Aeromonas; aquaculture; freshwater fish; beta hemolysis; antibiotic resistance
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Motile aeromonads isolated from the intestines of farm-raised freshwater fish such as Catla catla, Labeo rohita and Ctenopharyngodon idella have been characterized to species level. Morphological and physiological grouping revealed 61% Aeromonas hydrophila, 30% Aeromonas caviae, 7% Aeromonas sobria and 2% which remained unidentified. Hemolytic activity was detected mostly in A. hydrophila, while only half of the A. sobria and A. caviae showed this activity. Antibiotic resistance patterns of the strains revealed that they had acquired a relatively higher resistance to oxyretracycline, amoxycillin, ampicillin, novobiocin and polymixin-B, implicating possible use of these antibiotics in the aquaculture systems. (C) 2004 Elsevier B.V. All rights reserved.
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