First Occurrence of Plesiomonas shigelloides Bacteria on/ in Carassius carassius and Silurus triostegus Fishes from Greater Zab River in Kurdistan Region, Iraq.

Abstract

The present study shows occurrence of Plesiomonas shigelloides bacteria from Carassius carassius and Silurus triostegus that collected in Greater Zab River in Aski-Kalak in Erbil from October 2018 to November 2019. Swaps were taken from lesions on the skin, fins and internal organs of the 34 fishes (14 from C. carassius and 20 from S. triostegus) and inoculated in nutrient agar, blood agar and MacConkey agar. The agar plates were incubated at 37°C for 24-48 hours. Obtained 13 isolates, the bacterial isolates identified depending on some morphological, cultural, some biochemical test and further confirmed by Vitek 2 compound system. For characterization and identification the bacterial colonies were examined and then showed Gram negative reaction and motile. Biochemical tests were done by Vitek 2 compound system and result confirming. The study showed appearance of P. shigelloides on the skin lesions and intestine of the examined fish. The present existence of P. shigelloides bacteria regarded as first record for this bacterium in Iraq on and in fishes.

Keywords

• Fish pathogen, Plesiomonas shigelloides, Carassius carassius, Silurus triostegus.