Identification of Melioidosis Outbreak by Multilocus Variable Number Tandem Repeat Analysis

Identification of Melioidosis Outbreak by Multilocus Variable Number Tandem Repeat Analysis

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Endemic melioidosis is caused by genetically diverse Burkholderia pseudomallei strains.However, clonal outbreaks (multiple cases caused by 1 strain) have occurred, such as from contaminated potable water.B.

pseudomallei is designated a group B bioterrorism agent, which necessitates rapidly recognizing point-source outbreaks.Pulsed-field gel electrophoresis (PFGE) and multilocus sequence typing (MLST) simply southern cat shirt can identify genetically related isolates, but results take several days to obtain.We developed a simplified 4-locus multilocus variable number tandem repeat analysis (MLVA-4) for rapid typing and compared results with PFGE and MLST for a large number 730 sunken lake road of well-characterized B.

pseudomallei isolates.MLVA-4 compared favorably with MLST and PFGE for the same isolates; it discriminated between 65 multilocus sequence types and showed relatedness between epidemiologically linked isolates from outbreak clusters and between isolates from individual patients.MLVA-4 can establish or refute that a clonal outbreak of melioidosis has occurred within 8 hours of receipt of bacterial strains.