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Diagnosis of Streptococcus suis Infection in Pigs Presumptive diagnosis is generally based on history, clinical signs, age of animals, and gross lesions. Isolation and serotyping of the infectious agent and, if possible, evaluation of microscopic lesions in affected tissues confirm the diagnosis.

Some patients with S. suis meningitis have experienced relapse after 2 weeks of treatment with or but responded to prolonged treatment (4-6 weeks) [10].

Beta-lactam antibiotics (, and ceftiofur) and fluoroquinolone antibiotics such as are used in pigs and humans to treat S. suis infections [16–18]. Generally, three major antibiotics (, and -sulfonamides) are frequently used in S. suis infection [16].

Streptococcus suis is a zoonotic pathogen that causes serious systemic infections in pigs and occupation-related infections in humans who contact with pigs or pork products. The most common clinical manifestations are meningitis and sepsis.

suis) is a family of pathogenic gram-positive bacterial strains that represents a primary health problem in the swine industry worldwide. S. suis is also an emerging zoonotic pathogen that causes severe human infections clinically featuring with varied diseases/syndromes (such as meningitis, septicemia, and arthritis).

Some patients with S. suis meningitis have experienced relapse after 2 weeks of treatment with or but responded to prolonged treatment (4-6 weeks) [10].

Streptococcus suis is facultative anaerobic gram-positive α-hemolytic coccus and classified, based on cell-wall antigenic determinants, to be related to Lancefield group D streptococci. It is an important zoonotic bacterial pathogen of pigs worldwide.

S. suis infection is a common disease among pigs. The bacterium is carried in the upper respiratory tract of pigs, and spread among pigs by nose-to-nose contact or by aerosol over short distances. Apart from pigs (including wild boars), it can occasionally be found in other animals such as horses, dogs, cats and birds.