Streptococcus suis

Streptococcus suis
Systematics
Department :	Firmicutes
Class :	Bacilli
Order :	Lactic acid bacteria (Lactobacillales)
Family :	Streptococcaceae
Genre :	Streptococcus
Type :	Streptococcus suis
Scientific name
	Streptococcus suis
	(ex Elliot 1966) ; Kilpper-Bälz & Schleifer 1987

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Streptococcus suis is a bacterium from the genus Streptococcus and causes enzootic streptococcal meningitis in pigs . S. suis also affects other animals, is also pathogenic to humans and thus a zoonotic agent .

S. suis is gram-positive , rounded, facultative anaerobic and catalase-negative . A distinction is made between 35 serovars belonging to the Lancefield groups R, S and T.

Virulence factors

S. suis has several virulence factors :

polysaccharide-containing capsule
non-fimbrated adhesins
Hemolysins (serovar 2: suilysin)
Survival in macrophages

The phenotype differentiation is based on the proteins MRP ( muramidase released protein ) and EF ( extracellular factor ).

Streptococcus suis as a causative agent of zoonoses

Tiết canh

As a causative agent of zoonoses, S. suis is particularly important in countries where a lot of pork is consumed and where people and pigs live together in a relatively small area. This is especially the case in the non-Islamic countries of Southeast Asia (southern China, Indochina ). In Vietnam , Tiết canh , a type of blood pudding with fresh, non-coagulable pig blood, which is eaten cold, enjoys a certain popularity. This leads to infections with S. suis every year , some of which are severe ( bacteremia , septicemia , meningitis ) and fatal. 90 percent of all severe S. suis cases are reported from Asia.

Antibiotics effective against Streptococcus suis are, for example, ceftriaxone and cefotaxime . Therapy takes place over 10 to 14 days, in the case of recurrences over 4 to 6 weeks.

source

Michael Rolle, Anton Mayr : Medical microbiology, infection and disease theory. 8th, revised edition. Enke, Stuttgart 2007, ISBN 978-3-8304-1060-7 .

Individual evidence

↑ Huong VT, Hoa NT, Horby P, Bryant JE, Van Kinh N, Toan TK, Wertheim HF: Raw pig blood consumption and potential risk for Streptococcus suis infection, Vietnam . Emerg Infect Dis 2014; 20 (11): 1895-8. doi : 10.3201 / eid2011.140915
^ Marianne Abele-Horn: Antimicrobial Therapy. Decision support for the treatment and prophylaxis of infectious diseases. With the collaboration of Werner Heinz, Hartwig Klinker, Johann Schurz and August Stich, 2nd, revised and expanded edition. Peter Wiehl, Marburg 2009, ISBN 978-3-927219-14-4 , p. 267.

[1] Huong VT, Hoa NT, Horby P, Bryant JE, Van Kinh N, Toan TK, Wertheim HF: Raw pig blood consumption and potential risk for Streptococcus suis infection, Vietnam . Emerg Infect Dis 2014; 20 (11): 1895-8. doi : 10.3201 / eid2011.140915

[2] Marianne Abele-Horn: Antimicrobial Therapy. Decision support for the treatment and prophylaxis of infectious diseases. With the collaboration of Werner Heinz, Hartwig Klinker, Johann Schurz and August Stich, 2nd, revised and expanded edition. Peter Wiehl, Marburg 2009, ISBN 978-3-927219-14-4 , p. 267.