Mannheimia (Pasteurella) species are common commensals on mucous membranes of most domestic animals worldwide but the organism seems to be enigmatic, changing its niche from commensal to a pathogenic bacterium under conditions of stress. M. haemolytica is associated with diseases in cattle causing pneumonic pasteurellosis, haemorrhagic septicaemia and abortion.
Florfenicol resistance: Mannheimia haemolytica
Publications
Cattle
The low rate of resistance development, the low prevalence of transferable resistance determinants among bovine respiratory pathogens, and the limited use of phenicols in human and veterinary medicine explain the continued high degree of florfenicol susceptibility among bovine respiratory isolates.