Relationship of the Representatives of Eight Genera of Siphonaptera Order and Yersinia Pestis from Tuva Natural Plague Focus
https://doi.org/10.31631/2073-3046-2018-17-3-32-37
Abstract
Mutual relations of Yersinia pestis and fleas are a necessary condition to estimation the role of carriers in maintenance of the causative agent circulation. Objective – the comparative analysis of frequency of «conglomerate» and «block» formations by Y. pestis in fleas parasitizing on the main and minor carriers in the Tuva natural focus. Materials and methods. Results of experiments with representatives of eight genera of Siphonaptera order and Y. pestis subsp. pestis from the Tuva focus were analyzed. Mammals with various epizootological roles in the focus were used as flea fooders. Frequency of «block» and bacterial «conglomerate» formations and death of the infected insects was estimated. Results and discussion. The highest level of block formation was observed in Citellophilus tesquorum altaicus, Frontopsylla elatoides, Neopsylla mana, Oropsylla alaskensis, Rhadinopsylla li transbaicalica – parasites of the basic carrier (Spermophilus undulates). Formation of «conglomerates» was more often revealed in F. hetera, Paradoxopsyllus scalonae, P. scorodumovi, P. dashidorzhii, Amphipsylla primaris – ectoparasites of the minor carriers (Ochotona pallasi, Alticola strelzovi). Positive connection between frequency of Y. pestis conglomerate formations in fleas and their death rate was detected. Maximal death rate of the carrier was observed at high degree of Y. pestis aggregation. It was supposed that fleas of the basic carrier participated in a greater degree in Y. pestis distribution and ectoparasites of the secondary carriers – in its persistence.
About the Authors
L. P. Bazanova
Irkutsk Antiplague Research Institute of Rospotrebnadzor, Irkutsk
Russian Federation
Dr. SCi. (Biol.), leading researcher of the zoological and parasitological department
Russian Federation
Dr. SCi. (Biol.), leading researcher of the zoological and parasitological department
A. Yu. Nikitin
Irkutsk Antiplague Research Institute of Rospotrebnadzor, Irkutsk
Russian Federation
Dr. SCi. (Biol.), Associate Professor, leading researcher of the zoological and parasitological department
Russian Federation
Dr. SCi. (Biol.), Associate Professor, leading researcher of the zoological and parasitological department
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Review
For citations:
Bazanova L.P., Nikitin A.Yu. Relationship of the Representatives of Eight Genera of Siphonaptera Order and Yersinia Pestis from Tuva Natural Plague Focus. Epidemiology and Vaccinal Prevention. 2018;17(3):32-37. (In Russ.) https://doi.org/10.31631/2073-3046-2018-17-3-32-37
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