Characterization of Mannheimia (Pasteurella) haemolytica leukotoxin interaction with bovine alveolar macrophage $\eta$2 integrins Praveen Thumbikat, Thamotharampillai Dileepan, Mathur S. Kannan and Samuel K. Maheswaran Vet. Res., 36 5-6 (2005) 771-786 DOI: 10.1051/vetres:2005036