Isolation of Salmonella enterica subspecies enterica serovar Paratyphi B dT+, or Salmonella Java, from Indonesia and alteration of the d-tartrate fermentation phenotype by disrupting the ORF STM 3356

Kyung Ho Han, Seon Young Choi, Je Hee Lee, Hyejon Lee, Eun Hee Shin, Magdarina D. Agtini, Lorenz von Seidlein, R. Leon Ochiai, John D. Clemens, John Wain, Ji-Sook Hahn, Bok Kwon Lee, Manki Song, Jongsik Chun, Dong Wook Kim

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Abstract

Salmonella enterica subspecies enterica serovar Paratyphi B [O1,4,(5),12?:?Hb?:?1,2] can cause either an enteric fever (paratyphoid fever) or self-limiting gastroenteritis in humans. The d-tartrate non-fermenting variant S. enterica subsp. enterica serovar Paratyphi B dT- (S. Paratyphi B) is the causative agent of paratyphoid fever, and the d-tartrate fermenting variant S. enterica subsp. enterica serovar Paratyphi B dT+ (S. Paratyphi B dT+; formerly called Salmonella Java) causes gastroenteritis. S. Java is currently recognized as an emerging problem worldwide. Twelve dT+ S. Java isolates were collected in Indonesia between 2000 and 2002. One-third of them contained Salmonella genomic island 1 (SGI1), which gives the multidrug-resistant phenotype to the bacteria. In this study, a PCR-based method to detect a single nucleotide difference responsible for the inability to ferment d-tartrate, reported elsewhere, was validated. The d-tartrate fermenting phenotype of S. Java was converted to the non-fermenting phenotype by the disruption of the ORF STM 3356, and the d-tartrate non-fermenting phenotype of the ORF STM 3356-disrupted strain and the dT- reference strain was changed to the dT+ phenotype by complementing ORF STM 3356 in trans. The results show that the dT+ phenotype requires a functional product encoded by STM 3356, and support the use of the PCR-based discrimination method for S. Paratyphi B and S. Java as the standard differentiation method.
Original languageEnglish
Pages (from-to)1661-1665
Number of pages5
JournalJournal of Medical Microbiology
Volume55
Issue number12
DOIs
Publication statusPublished - Dec 2006

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