https://doi.org/10.66358/sozusa.v3i1.001

Re-isolation, identification, pathogenicity and antibiotic sensitivity  during experimental Infection of  Nile Tilapia (Oreochromis Niloticus) With Proteus

Vulgaris Bacteria under some stress factors

ناجى موسى عبدالرحيم  – غيضان خليل سعيد –  حنان خليل أمراجع – سالمه أبراهيم أحمدى

الملخص

إعادة عزل و توصيف وأمراضية بكتيريا بروتيس فولقارس المحقونة صناعيا في سمك البلطى النيلي المعرض لظروف بيئية غير ملائمه

Abstract

This study was conducted to isolate, identify, and characterize the pathogenicity of Proteus vulgaris isolated from an experimental infection of Nile tilapia . Sixty Nile tilapia (Oreochromis niloticus)  fish with an average weight of 50 g were used. To test pathogenicity, two groups were injected intraperitoneally with the same dose 0.06 ml (1.5 × 109 CFU/ml / fish). Pathogenicity was confirmed in group A of Proteus vulgaris at a water temperature of 27 °C and favorable environmental conditions with a 40% mortality rate, while in group B, pathogenicity was confirmed at a water temperature of 37 °C and adverse environmental conditions with an 80% mortality rate, This indicates the impact of unsuitable environmental conditions on fish health and the rapid spread of bacteria inside the fish’s body, causing deaths.. The injected Proteus vulgaris was re-isolated from the liver, kidney, and intestine of the infected fish.

Keywords: Nile tilapia , Proteus vulgaris , environmental conditions, experimental infection

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