Bacterial isolates No. of dead embryos Gross lesions in heart Gross lesions inLiver Grosslesions inSpleen Gross lesions InIntestine Gross lesions in Lung Escherichia coli 7 ++ +++ ++ +++ + Staphylococcus  spp. 4 ++ ++ ++ ++ + Streptococcus spp. 3 + + + ++ + Pseudomonas spp. 4 ++ + + + -

+ = Mild lesion. ++ = Moderate lesion. +++ = severe lesion. - = No lesion

Table 2: Bacterial isolates, numbers dead embryos with yolk sac infection and degree of severity of lesions in various organs of dead embryos in three local hatcheries.