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J Clin Microbiol. Jan 1989; 27(1): 213–214.
PMCID: PMC267269

Detection of pathogenic Yersinia enterocolitica by using congo red-magnesium oxalate agar medium.


A Congo red-magnesium oxalate agar medium was developed to detect expression of virulence-associated calcium dependency and Congo red absorption in Yersinia enterocolitica. Of the 157 pathogenic serotypes tested, 119 (75.8%) were positive; 98% of nonpathogenic serotypes and strains of three other Yersinia species were negative.

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Selected References

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  • Gemski P, Lazere JR, Casey T. Plasmid associated with pathogenicity and calcium dependency of Yersinia enterocolitica. Infect Immun. 1980 Feb;27(2):682–685. [PMC free article] [PubMed]
  • Kandolo K, Wauters G. Pyrazinamidase activity in Yersinia enterocolitica and related organisms. J Clin Microbiol. 1985 Jun;21(6):980–982. [PMC free article] [PubMed]
  • Kay BA, Wachsmuth K, Gemski P, Feeley JC, Quan TJ, Brenner DJ. Virulence and phenotypic characterization of Yersinia enterocolitica isolated from humans in the United States. J Clin Microbiol. 1983 Jan;17(1):128–138. [PMC free article] [PubMed]
  • Laird WJ, Cavanaugh DC. Correlation of autoagglutination and virulence of yersiniae. J Clin Microbiol. 1980 Apr;11(4):430–432. [PMC free article] [PubMed]
  • Prpic JK, Robins-Browne RM, Davey RB. Differentiation between virulent and avirulent Yersinia enterocolitica isolates by using Congo red agar. J Clin Microbiol. 1983 Sep;18(3):486–490. [PMC free article] [PubMed]
  • Schiemann DA, Devenish JA, Toma S. Characteristics of virulence in human isolates of Yersinia enterocolitica. Infect Immun. 1981 Apr;32(1):400–403. [PMC free article] [PubMed]
  • Toma S, Wauters G, McClure HM, Morris GK, Weissfeld AS. O:13a,13b, a new pathogenic serotype of Yersinia enterocolitica. J Clin Microbiol. 1984 Nov;20(5):843–845. [PMC free article] [PubMed]

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