Molecular Detection of Aeromonas hydrophila as the Main Cause of Outbreak in Tilapia Farms in Egypt

An outbreak recorded in Tilapia farms in Kafrelsheikh governorate with high mortalities ranged between 30-70 % in the summer season of 2014.This study was conducted for isolation and identification of the causative agent responsible for mortalities in four fish farms.Twelve Aeromonas isolates were identified by PCR using Aeromonas species primer at the molecular weight of (953 bp) then all strains were also confirmed by PCR as Aeromonas hydrophila using Aeromonas hydrophila specific-16S rRNA gene primer at the molecular weight of (103 bp).