Pathogenic status antibiogram adhesive characteristics heavy metal tolerance and incidence of integrons of infected fish isolated Aeromonas sp.

Sabayasaohi P., . and Shankar R. S., . and Kumar D. B., . and Kumar S. P., . and Pasim R. K., . Pathogenic status antibiogram adhesive characteristics heavy metal tolerance and incidence of integrons of infected fish isolated Aeromonas sp. pp. 21-35. ISSN 1823-8556

Motile aeromonad infection is a common disease in freshwater fish that is difficult to control. This study assessed the pathogenic properties of Aeromonas spp. isolated from major carps at Indian farms. Five selected virulent isolates were screened for antibiogram biofilm-producing potential heavy metal tolerance and the presence of integrons. A. sobria along with two isolates each of A. hydrophila and A. veronii that were found to be pathogenic in an in vivo challenge study were observed to be resistant to 12 types of antibiotics. However they did show susceptivity to fluoroquinolones and aminoglycosides. Norfloxacin chloramphenicol ciprofloxacin levofloxacin amikacin and gentamicin effectively inhibited the growth of all five Aeromonas isolates. The isolates were tolerant to Cu2 but not Hg2 in the heavy metal assay. A. sobria and both A. Hydrophila isolates were found to be tolerant to Cr6. The A. sobria and one A. hydrophila isolate (ATCC 0637P) were strong producers of biofilm. The presence of amplicons for integrons I and II were detected in A.sobria and both A. hydrophila isolates. This investigation produced a baseline information on the prevalence of potential pathogenic Aeromonas in aquaculture systems that could pose a serious risk if they were passed to animals and humans through close contact.

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Abstract

Motile aeromonad infection is a common disease in freshwater fish that is difficult to control. This study assessed the pathogenic properties of Aeromonas spp. isolated from major carps at Indian farms. Five selected virulent isolates were screened for antibiogram biofilm-producing potential heavy metal tolerance and the presence of integrons. A. sobria along with two isolates each of A. hydrophila and A. veronii that were found to be pathogenic in an in vivo challenge study were observed to be resistant to 12 types of antibiotics. However they did show susceptivity to fluoroquinolones and aminoglycosides. Norfloxacin chloramphenicol ciprofloxacin levofloxacin amikacin and gentamicin effectively inhibited the growth of all five Aeromonas isolates. The isolates were tolerant to Cu2 but not Hg2 in the heavy metal assay. A. sobria and both A. Hydrophila isolates were found to be tolerant to Cr6. The A. sobria and one A. hydrophila isolate (ATCC 0637P) were strong producers of biofilm. The presence of amplicons for integrons I and II were detected in A.sobria and both A. hydrophila isolates. This investigation produced a baseline information on the prevalence of potential pathogenic Aeromonas in aquaculture systems that could pose a serious risk if they were passed to animals and humans through close contact.

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Item Type:	Article
AGROVOC Term:	Aeromonas
AGROVOC Term:	Aeromonas hydrophila
AGROVOC Term:	Gram negative bacteria
AGROVOC Term:	Pathogens
AGROVOC Term:	Isolation
AGROVOC Term:	Freshwater fishes
AGROVOC Term:	Labeo rohita
AGROVOC Term:	Catla
AGROVOC Term:	Cirrhinus mrigala
AGROVOC Term:	Pathogenicity
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:54
URI:	http://webagris.upm.edu.my/id/eprint/8107

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