Leptospirosis is spread in the urine of infected animals. Only people in close contact with infected urine are at risk. Pasteurella multocida causes respiratory disease in swine. Infection in humans is rare. Respiratory infection in pig breeders has been reported, but most human cases of Pasteurella multocida are linked to dog or cat bites.
Salmonella choleraesuis infections in humans are extremely rare and can cause death.
It is a food-borne disease. Children, the elderly, and immunocompromised people are most susceptible. Streptococcus suis has not been reported to cause disease humans in U.S. Swine flu has infected humans on rare occasions since the 1918 human influenza outbreak. Most infections are mild, and death is rare. Toxoplasma is a parasite.