الفهرس | Only 14 pages are availabe for public view |
Abstract Shrimp production is a significant global export product. However, it is estimated that bacterial diseases result in losses of over 6 billion dollars for the shrimp farming industry. In order to diagnose these bacterial pathogen infections in shrimp, the current study was conducted in 2019. 80 adult, freshly dead penaeid shrimps were collected seasonally from local Suez fishing men rounds and underwent clinical, bacteriological, molecular and histopathological examinations. The diseased shrimp displayed red coloring with a soft and loose exoskeleton, and brown to black or white spots on their exoskeleton, pleopods, uropods and telsons. The most prevalent bacteria were Vibrio species (82.5%), followed by Pseudomonas species (78.75%), and then Aeromonas species (42.5%). The highest prevalence was found in the summer season and the hepatopancreas was the most commonly affected organ. Antibiotic sensitivity tests showed that most pathogens were highly susceptible to gentamycin and tetracycline. Histopathological examinations revealed epicuticular damage, subcuticular edema, and muscular degeneration and necrosis in diseased shrimp tissue, as well as sloughing, degeneration and vacuolation of the majority of hepatopancreas cells. Keywords: Shrimp, Aeromonas, Pseudomonas infection, Antibiotic susceptibility, PCR. |