EN
Gallibacterium spp. is a new genus of the family Pasteurellaceae. These Gram-negative rods are a part of the physiological flora of the upper respiratory tract, genital tract and gastrointestinal tract of birds and have been found in different species of domestic and wild birds. They are opportunistic pathogens that were isolated from birds with pathological lesions or conditions. This paper presents the first case of Gallibacterium anatis isolation from peacocks with respiratory tract infections. Three isolates from lung tissue were identified on the basis of phenotypic properties as Gallibacterium anatis biovar Haemolytica. The whole flock of peacocks was isolated in a small closed farm building for 5 weeks. During this period the first clinical signs of the disease were observed. That situation could result in immunosuppression in birds, which is one of the predisposing factors of opportunistic G. anatis infections. This observation confirms the important role of the stress factor in an infection caused by these bacteria.