Avian hepatitis: Certain types of bacterial hepatitis are caused by more than one microorganism, as in the case of the image, where Salmonella, E. coli and Streptococcus were isolated. The infection can come from the intestine of the bird itself, although sometimes the infection is vertical, with the bacteria coming from the breeders. It is recommended to check the health status of both broilers and breeders to clarify the origin of the infection and apply adequate preventive measures.