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Characterization of Aeromonas hydrophila isolated from freshwater fish with control trial
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Characterization of Aeromonas hydrophila isolated from freshwater fish with control trial
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Journal Article
Characterization of Aeromonas hydrophila isolated from freshwater fish with control trial
2025
Overview
Aeromonas hydrophila
is an opportunistic pathogen that is highly important for freshwater fish. In the present study, two freshwater fish species Nile tilapia (
Oreochromis niloticus
) and Mullet (
Mugil cephalus
) collected from various fish farms in Kafrelsheikh Governorate, Egypt. The fish samples were examined to determine
Aeromonas hydrophila
presence (
A. hydrophila
). In addition, a treatment trial was conducted involving four groups of Nile tilapia fish, which treated with florfenicol (FFC) and oxytetracycline (OTC) based on the antimicrobial susceptibility test results. According to the findings, 12 (20%)
A. hydrophila
strains were isolated from a total of 60 collected fish samples (30 of Nile tilapia and Mullet with percentages of 30% and 10%, respectively). Based on species-specific 16 S rRNA genes, six (6) isolates were identified as
A. hydrophila
and carried aerolysin (
aer
A) and hemolysin (
hyl
A) virulence genes, with percentages of 83.3% and 50%, respectively. Whereas, the antimicrobial resistance gene results were
bla
TEM with percent (100%) and
aadA
1 (83.3%). Histopathological changes were significantly reduced in all assessed organs (liver, spleen, kidney, and gills) in the FFC group compared to the OTC-treated group. The prevalence of virulent and multidrug-resistant
A. hydrophila
in aquaculture poses significant risks to fish health, economic productivity, and public health.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ 692/420
/ Aeromonas hydrophila - drug effects
/ Aeromonas hydrophila - genetics
/ Aeromonas hydrophila - isolation & purification
/ Aeromonas hydrophila - pathogenicity
/ Animals
/ Anti-Bacterial Agents - pharmacology
/ Antimicrobial susceptibility test
/ Bacteria
/ Disease
/ Egypt
/ Farmers
/ Farms
/ Fish Diseases - drug therapy
/ Fish Diseases - microbiology
/ Food contamination & poisoning
/ Gills
/ Gram-Negative Bacterial Infections - drug therapy
/ Gram-Negative Bacterial Infections - microbiology
/ Gram-Negative Bacterial Infections - veterinary
/ Humanities and Social Sciences
/ Oxytetracycline - pharmacology
/ RNA, Ribosomal, 16S - genetics
/ rRNA
/ Science
/ Thiamphenicol - analogs & derivatives
/ Thiamphenicol - pharmacology
/ Tilapia
