verview on the Most Prevailing Bacterial Diseases Infecting Oreochromis niloticus at Aswan Fish Hatchery, Egypt

Abstract

T ilapia is an ideal candidate for aquaculture especially in developing countries.It has a fast growth rate, able to reproduce in captivity, has a short generation time, resist stress and diseases, accept artificial feeds immediately after yolk-sac absorption, feed on low trophic levels and tolerate a wide range of environmental conditions (El-Sayed, 2006).Oreochromis niloticus, the most important aquaculture species of the 21 st century (FAO, 2012); contributes about 83% of the total global tilapia production (Gupta and Acosta, 2004; Bostock et al., 2010 ; Gaafar et al., 2015).It is considered as the most common and popular fish in Egypt, and has proved to be vital, contributing from 30 to 40 % of the total production of the Lake Nasser in Egypt (Latif and Rashed, 1983).However, tilapia cultivation may display some health problems, which are associated with the presence of pathogenic bacteria (Pech et al., 2017).