ERYSIPELOTHRIX MONOCYTOGENES 403 



Antigenic Structure. — Probably 4 types, distinguished primarily on flagellar and secon- 

 darily on somatic antigens. Types 1 and 2 have the same H but different O antigens. 

 Types 3 and 4 have each specific H and specific O antigens. 



Pathogenicity. — Causes disease in a wide variety of animals, including occasionally man. 

 Experimentally it is pathogenic for mice, rabbits, guinea-pigs, but not pigeons. 

 Non-lethal doses set up a monocytosis in rabbits. Virulence often falls on 

 artificial cultivation. No exotoxin is produced. 



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