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YERSINIA INFECTIONS : CLINICAL ASPECTS
Both Y.enterocolitica and Y. pseudotuberculosis cause acute mesenteric lymphadenitis, a syndrome involving fever and abdominal pain that often mimics acute appendicitis.Y. enterocolitica also produces awidervarietyof manifestations. Themost common of these is an enterocolitis, which usually occurs in children. It is characterized by fever, di- arrhea, and abdominal pain. It also causes enteric fever, terminal ileitis, and a polyar- thritic syndrome associated with its diarrheal manifestations. Few laboratories in the United States routinely screen stools for Yersinia, because yield has been low and good selective media are not available.
The role of antimicrobial therapy in the enteric Yersinia infections is uncertain, be-cause they are usually self-limiting. Y. pseudotuberculosis is susceptible to ampicillin, cephalosporins, aminoglycosides, tetracyclines, and chloramphenicol, butY. enterocoliticais usually resistant to penicillins and cephalosporins through the production of lactamases.
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