Bacteriocarriage of ixodid mites on the Trans-Baikal Territory

Abstract

The results of a microbiological study of sexually mature ixodid mites of the genus Dermacentor collected in the rural areas of the Trans-Baikal Territory are presented. Microbiological examination of 152 ixodid mites was carried out. Four microbial cultures of different species were identified: Listeria monocytogenes, E. coli, Salmonella typhi, Clostridium botulinum. The presence of bacteria associations of different species groups in the mite body was noted: in 32 individuals - L. monocytogenes, E. coli, S. typhi, in 56 - C. botulinum, E. coli, S. typhi, in 6 - L. monocytogenes, E. coli, in 15 - C. botulinum, E. coli. Of all the isolated microbial strains, Escherichia coli made up the largest number: this microorganism was isolated from all mites. L. monocytogenes appeared to be the least isolated: 38 of 152 mites were its carriers. Salmonellosis pathogen circulation was detected in 123 mites out of 152 examined specimens. The biological properties of all the isolated microbial cultures corresponded to their classical characteristics. Microorganisms of the genus Clostridium isolated from the mites on the Kitt-Tarozzi nutrient medium caused uniform turbidity of the nutrient medium, which indicates that this bacterial strain belongs to serovars C, D, E and В. The data obtained indicate the need for annual veterinary control of the grazing areas for the presence of natural foci, the reservoirs of pathogens which are pasture mites. During the period of ixodid mites mass attack it is necessary to carry out acaricide treatments of animals with repellent and acaricide preparations that will not only increase their productivity, but will also allow preventing infectious diseases.