Objective Streptococcus suis (S. suis) is a causative agent for various syndromes in pigs. It can be transmitted to humans with typical symptoms of meningitis and death. Data in Bali Referral Hospital showed more than 40 confirmed human cases of S. suis meningitis in 2014. Cases of S. suis infection in pigs have never been confirmed in the province. Here we provide evidence of the bacteria in sick pigs in that world tourist destination province. Results The S. suis was confirmed in eight out of 30 cases. Prominent histopathological lesions of confirmed cases were meningitis, endocarditis, pericarditis, bronchopneumonia, enteritis, and glomerulonephritis. The dominant inflammatory cells were neutrophils and macrophages. Further research is needed to understand the risk factor of human infection. Awareness of the community on the risk of contracting S. suis is needed to prevent human infections.

Background Streptococcus suis (S. suis) is a causative agent for various syndromes in pigs. It can be transmitted to humans with typical symptoms of meningitis and death. Data in Bali Referral Hospital showed more than 40 confirmed human cases of S. suis meningitis in 2014. Cases of S. suis infection in pigs have never been confirmed in the province. Here we provide evidence of the bacteria in sick pigs in that world tourist destination province. Results The S. suis was confirmed in eight out of 30 cases. Prominent histopathological lesions of confirmed cases were meningitis, endocarditis, pericarditis, bronchopneumonia, enteritis, and glomerulonephritis. The dominant inflammatory cells were neutrophils and macrophages. Conclusions Streptococcus suis has been confirmed in sick pig in Bali, Indonesia. Further research is needed to understand the risk factor of human infection. Awareness of the community on the risk of contracting S. suis is needed to prevent human infections.