Prevalence of some potentoal pathogens in nile fishes

Summary:-Since fish and shellfish are subjected to the risk of contaminationwith vanous pathogens either during their presence in aquaticenvironments or after being harvested for marketing. Thus,bacteriological examination was performed on one handred samples ofTilabia nilotica and Pagrus bayad (fifty of each).The pseudomonas organisms were detected from 68% and 42% ofexamined samples of T nilotica and P. bayad respectively. Furthermore,the total Pseudomonas count ranged from 40 to 2.6 x 103 with an averageof 5.46 x 102 +1.10 x 102/g for T. nilotica and 10 to 8 x 102 with anaverage 1.01 x 102 +0.36 x 102 for P. bayad. Moreover, non of examinedP. bayad samples had’ Pseudomonas count over 103 whilemean, 14% ofT nilotica samples had Pseudomonas count fringed from 103 to < J 04.Aeromonas organisms could be isolated from 38% and 22% of examinedsamples of T nilotica and P. bayad respectively and the total Aeromonascount ranged from 30 to 1.2 x 103 with an average 4.9 x 102 ± 0.88 x 102for T nilotica samples and 10 to 3 x 102 with an average 7.18 x 10 ± 0.28x 10 for P. bayad samples.Also non of examined samples of P. bayad had Aeromonas countover 103 while 6% of T nilotica samples had Aeromonas count rangedfrom 103 to < 104,