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Streptococcus suis infections in humans: the Chinese experience and the situation in North America

Published online by Cambridge University Press:  13 August 2007

Marcelo Gottschalk ,
Mariela Segura  and
Jiangu Xu
Marcelo Gottschalk*
Affiliation:
Groupe de Recherche sur les Maladies Infectieuses du Porc (GREMIP) and the Centre de Recherche en Infectiologie Porcine (CRIP), Faculté de Médecine Vétérinaire, Université de Montréal, 3200 rue Sicotte, St-Hyacinthe, Québec, J2S 2M2, Canada
Mariela Segura
Affiliation:
Centre for the Study of Host Resistance, McGill University, Montreal, Québec, Canada
Jiangu Xu
Affiliation:
State Key Laboratory for Infectious Disease Prevention and Control and National Institute for Communicable Disease Control and Prevention (China CDC), Beijing, People's Republic of China
*
*Corresponding author. E-mail: [email protected]
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Abstract

Infections caused by Streptococcus suis are considered a global problem in the swine industry. In this animal species, S. suis is associated with septicemia, meningitis, endocarditis, arthritis and, occasionally, other infections. Moreover, it is an agent of zoonosis that afflicts people in close contact with infected pigs or pork-derived products. Although sporadic cases of S. suis infection in humans have been reported, a large outbreak due to S. suis serotype 2 emerged in the summer of 2005 in Sichuan, China. A similar outbreak was observed in another Chinese province in 1998. Symptoms reported in these two outbreaks include high fever, malaise, nausea and vomiting, followed by nervous symptoms, subcutaneous hemorrhage, septic shock and coma in severe cases. The increased severity of S. suis infections in humans, such as a shorter incubation time, more rapid disease progression and higher rate of mortality, underscores the critical need to better understand the factors associated with pathogenesis of S. suis infection. From the 35 capsular serotypes currently known, serotype 2 is considered the most virulent and frequently isolated in both swine and humans. Here, we review the epidemiological, clinical and immunopathological features of S. suis infection in humans.

Keywords

Streptococcus suishumanspigseptic shockepidemiologypathogenesis
Type
Review Article
Information
Animal Health Research Reviews , Volume 8 , Issue 1 , June 2007 , pp. 29 - 45
Copyright
Copyright © Cambridge University Press 2007

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