Bacterial Pathogens and Their Antimicrobial Resistance in Farmed Nile Tilapia Experiencing "Summer Mortality" in Kafr El-Sheikh, Egypt.

ABSTRACT: During four outbreaks in 2023 and 2024, samples from pond-reared Nile tilapia were taken from different farms located in Kafr Elsheikh governorate, Egypt. Samples were submitted for laboratory examinations. Diseased fish exhibited bacterial septicemia and some cases died without showing any clinical signs. A total of 30 bacterial isolates were isolated and identified. Of these isolates, 57% were identified as Gram-positive bacteria, whereas the remaining 43% were identified as Gram-negative bacteria. PCR targeting the 16S rRNA gene and genome sequencing confirmed five bacterial isolates as Aeromonas veronii (30%), Vibrio alginolyticus (13.3%), Enterococcus faecalis (23.3%), Aerococcus viridans (16.7%), and Staphylococcus epidermidis (16.7%). The NC

SUBMITTER: Hassan MMA 

PROVIDER: S-EPMC12654396 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature