Genetic diversity of Francisella tularensis subsp. holarctica in Kazakhstan. 2021

Vladislav Shevtsov, and Alma Kairzhanova, and Alexandr Shevtsov, and Alexandr Shustov, and Ruslan Kalendar, and Sarsenbay Abdrakhmanov, and Larissa Lukhnova, and Uinkul Izbanova, and Yerlan Ramankulov, and Gilles Vergnaud
National Center for Biotechnology, Nur Sultan, Kazakhstan.

Tularemia is a highly dangerous zoonotic infection due to the bacteria Francisella tularensis. Low genetic diversity promoted the use of polymorphic tandem repeats (MLVA) as first-line assay for genetic description. Whole genome sequencing (WGS) is becoming increasingly accessible, opening the perspective of a time when WGS might become the universal genotyping assay. The main goal of this study was to describe F. tularensis strains circulating in Kazakhstan based on WGS data and develop a MLVA assay compatible with in vitro and in silico analysis. In vitro MLVA genotyping and WGS were performed for the vaccine strain and for 38 strains isolated in Kazakhstan from natural water bodies, ticks, rodents, carnivores, and from one migratory bird, an Isabellina wheatear captured in a rodent burrow. The two genotyping approaches were congruent and allowed to attribute all strains to two F. tularensis holarctica lineages, B.4 and B.12. The seven tandem repeats polymorphic in the investigated strain collection could be typed in a single multiplex PCR assay. Identical MLVA genotypes were produced by in vitro and in silico analysis, demonstrating full compatibility between the two approaches. The strains from Kazakhstan were compared to all publicly available WGS data of worldwide origin by whole genome SNP (wgSNP) analysis. Genotypes differing at a single SNP position were collected within a time interval of more than fifty years, from locations separated from each other by more than one thousand kilometers, supporting a role for migratory birds in the worldwide spread of the bacteria.

UI MeSH Term Description Entries
D007623 Kazakhstan A country in central Asia, northwest of China. The capital is Astana. Kazakh S.S.R.,Kazakh SSR
D005603 Francisella The lone genus of bacteria in the family Francisellaceae, frequently found in natural waters. It can be parasitic in humans, other MAMMALS; BIRDS; and ARTHROPODS. Francisellaceae
D005838 Genotype The genetic constitution of the individual, comprising the ALLELES present at each GENETIC LOCUS. Genogroup,Genogroups,Genotypes
D000073336 Whole Genome Sequencing Techniques to determine the entire sequence of the GENOME of an organism or individual. Complete Genome Sequencing,Genome Sequencing, Complete,Genome Sequencing, Whole,Sequencing, Complete Genome,Sequencing, Whole Genome
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D014406 Tularemia A plague-like disease of rodents, transmissible to man. It is caused by FRANCISELLA TULARENSIS and is characterized by fever, chills, headache, backache, and weakness. Francisella tularensis Infection,Francisella tularensis Infections,Infection, Francisella tularensis,Tularemias
D014644 Genetic Variation Genotypic differences observed among individuals in a population. Genetic Diversity,Variation, Genetic,Diversity, Genetic,Diversities, Genetic,Genetic Diversities,Genetic Variations,Variations, Genetic
D014871 Water Microbiology The presence of bacteria, viruses, and fungi in water. This term is not restricted to pathogenic organisms. Microbiology, Water
D060885 Multiplex Polymerase Chain Reaction Methods for using more than one primer set in a polymerase chain reaction to amplify more than one segment of the target DNA sequence in a single reaction. Multiplex Ligation-Dependent Probe Amplification,Multiplex PCR,Triplex PCR,Triplex Polymerase Chain Reaction,Multiplex Ligation Dependent Probe Amplification,PCR, Multiplex,PCR, Triplex
D020641 Polymorphism, Single Nucleotide A single nucleotide variation in a genetic sequence that occurs at appreciable frequency in the population. SNPs,Single Nucleotide Polymorphism,Nucleotide Polymorphism, Single,Nucleotide Polymorphisms, Single,Polymorphisms, Single Nucleotide,Single Nucleotide Polymorphisms

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