Streptococcus suis is transmitted to humans through close contact with infected pigs or pork, and people in occupational contact with pigs (e.g. pig farmers, abattoir workers, veterinarians) represent the principal risk group for the disease.
Streptokok suis se na ljudi prenaša s stikom z okuženim prašičem ali svinjino, najbolj ogrožena skupina ljudi pa so posamezniki, ki so v poklicnem stiku s prašiči (na primer prašičerejci, delavci v klavnicah, veterinarji).