Histophilus somni (formerly Haemophilus somnus)
- Causes multiple clinical syndromes affecting the brain, heart, lungs, and joints
- Prevalent organism and significant pathogen
- Exhibits a high degree of antigenic variation making it a good candidate for autogenous bacterin production
Addressing Histophilus somni Strain Variation
Histophilus somni, formerly known as Haemophilus somnus, is a common cause of disease in cattle. Infection with H. somni can cause an acute, often fatal, septicemic disease that may involve the respiratory, cardiovascular, musculoskeletal, or nervous systems. Although feedlot cattle of any age are potentially at risk, the disease is more common in recently weaned and/or shipped cattle.