Background:
Most birds probably can carry Listeria spp. asymptomatically in their intestines with varying prevalence and can transmit the pathogens to humans. The genus-Listeria has two pathogenic species namely, Listeria monocytogenes and Listeria ivanovii. Of these, L. monocytogenes is a well-known cause of abortion, encephalitis and septicaemia in man and animals. Listeria ivanovii is an animal pathogen and in rare cases cause human infection. Hence, a study was conducted to determine the occurrence of pathogenic Listeria monpcytogenes and Listeria ivanovii in cage birds faeces from Yazd.