Streptococcus suis

There have been several reports of zoonotic S. suis in people who have had direct contact with pigs, including:

• a farmer with meningitis
• an abattoir worker and another farmer with fulminant sepsis.

S. iniae

There are now several reports linking cellulitis or systemic S. iniae infections in humans to contact with infected fish. This bacteria has been recovered from at least 22 species of fish worldwide, but human infections have been particularly associated with contact with tilapia.

• In a study of commercial, hatchery-raised fish in the U.S., prevalence of infection in tilapia and hybrid striped bass was 3.8 and 7.2%, respectively. However, much higher infection prevalences have been noted in studies in Canada.

S. parasanguinis

This is a rare cause of subclinical mastitis in sheep that has also been associated with endocarditis in humans.

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