الفهرس 
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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.