Abstract

Yersinia pestis, host animals and vector organisms in a particular area within a certain geographical landscape, and biological communities are in the form of interdependence and mutual restriction of ecological system in the plague natural foci of plague. Currently, the preservation of Yersinia pestis mechanism mainly including: ① Animal and fleas (tick) preservation theory; ②Yersinia pestis own mutation preservation theory; ③Fleas-host-fleas preservation theory; ④Theory of soil preservation; ⑤the birds and abiotic factors of preservation theory; ⑥Theory of other Yersinia preservation theory and so on. The author summarized the research progress of the preservation mechanism of Yersinia pestis in the focus area. Key words: Yersinia pestis; Mechanism of persistence; The natural plague foci

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