Escherichia, Shigella , and Salmonella
2020; Wiley; Linguagem: Inglês
10.1128/9781683671077.ch11
AutoresLuis M. de la Maza, Marie T. Pezzlo, Cassiana E. Bittencourt, Ellena M. Peterson,
Tópico(s)Salmonella and Campylobacter epidemiology
ResumoEscherichia coli cause both extraintestinal and gastrointestinal infections, including urinary tract infections, septicemia, health care-related pneumonia, and wound infections. The most common extraintestinal E. coli infections are urinary tract infections in young women of childbearing age. Colonies of E. coli are gray, smooth, and often beta-hemolytic on blood agar. Hemolytic colonies isolated from urine specimens usually suggest more virulent strains. MacConkey agar and either Hektoen enteric or xylose lysine deoxycholate agar are recommended for optimal isolation of Shigella. The genus Salmonella is composed of two species, Salmonella enterica and Salmonella bongori, and there are more than 2,400 antigenically distinct members of these two species. Isolates of Salmonella spp. should be serotyped. These organisms may possess somatic, flagellar, and capsular antigens. In the diagnostic laboratory, serological identification is routinely performed by a slide agglutination method using polyvalent somatic antigen antisera as described for Shigella.
Referência(s)