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[New plasmidovars of Yersinia pestis isolated in Mongolia]
Abstract:
The plasmid spectres of 122 strains of Yersinia pestis isolated in Mongolia from patients, wild mammals and arthropods were studied. The populations of three plasmidovars of Yersinia pestis were found to be circulating in the natural foci of plague in Mongolia. The first plasmidovar harbours three plasmids with mol masses 6, 47, 65 Md. The second and third plasmidovars contain the plasmids with mol masses 6, 16, 47, 65 Md and 8, 47, 75-80 Md.
Insights
Three Yersinia pestis plasmid variants circulate in Mongolia. Researchers identified distinct plasmid profiles in strains from patients, animals, and arthropods, aiding plague surveillance. This study enhances understanding of Yersinia pestis epidemiology.
Area of Science:
- Microbiology
- Epidemiology
- Genetics
Background:
- Yersinia pestis is the causative agent of plague.
- Understanding plasmid diversity is crucial for tracking bacterial populations and disease transmission.
- Mongolia harbors natural plague foci with diverse Yersinia pestis strains.
Purpose of the Study:
- To characterize the plasmid profiles of Yersinia pestis strains from Mongolian natural plague foci.
- To identify circulating plasmidovars within different host populations (patients, wild mammals, arthropods).
- To provide insights into the genetic diversity and epidemiology of Yersinia pestis in Mongolia.
Main Methods:
- Plasmid DNA extraction from 122 Yersinia pestis isolates.
- Analysis of plasmid molecular masses using gel electrophoresis or similar techniques.
- Classification of strains into plasmidovars based on their plasmid content.
Main Results:
- Three distinct plasmidovars of Yersinia pestis were identified in Mongolia.
- Plasmidovar 1: three plasmids (6, 47, 65 Md).
- Plasmidovar 2: four plasmids (6, 16, 47, 65 Md).
- Plasmidovar 3: three plasmids (8, 47, 75-80 Md).
Conclusions:
- Distinct Yersinia pestis plasmidovars are actively circulating in Mongolian plague foci.
- The identified plasmid profiles can serve as markers for specific Yersinia pestis populations.
- This genetic characterization aids in understanding plague epidemiology and surveillance in the region.