Mannheimia haemolytica and respiratory complex diseases in calves

Abstract

Mannheimia haemolytica, formerly known as Pasteurella haemolytica, is a bacterium belonging to the family Pasteurellaceae. It is commonly found in the respiratory tracts of cattle and other ruminant animals, and is a significant pathogen in the cattle industry. This bacterium is known to cause bovine respiratory disease (BRD), which can lead to severe economic losses in the livestock industry.