Haemophilus somnus is a common disease-causing bacteria that spreads throughout cattle herds in a very elusive manner. Usually a major problem has already developed before the disease is detected. Haemophilus somnus complex is clinically manifested in the reproductive and urinary tract form, the respiratory form, the septicemic form, and a "catch-all" miscellaneous form. Disease caused by H. somnus can be prevented by the appropriate use of vaccines on the market. Allivet carries vaccinations for the prevention of Blackleg & Somnus, like UltraChoice 7, UltraChoice 8, Covexin 8, Ultrabac-7, and more.