Natural focality of XXXX in the Mongolian @entity1 's Republic; results and objectives of integrated research.

@entity1 @entity3667 @entity4536
In the summer 1976, natural foci of @entity4536 were discovered by the authors on the territory of the Mongolian @entity1 's Republic. In 1976-1983 the integrated research of these foci was conducted and maps of a structure of the geographical range of the pathogen were compiled taking into account the peculiarities of distribution of its carriers and vectors. Great gerbils are the only identified vertebrate hosts of @entity3667 and their infection rate comes up to 100% in single foci. Three species of sandflies belonging to subgenus Paraphlebotomus, Ph. andrejevi, Ph. mongolensis and Ph. alexandri, are vectors of the pathogen in foci. The most common of them in burrows of gerbils is Ph. andrejevi. It was established by genetic and biochemical methods that two variants of @entity3667 may circulate simultaneously in individual natural foci in the MPR, but both of them have a low virulence and are not dangerous for @entity1 .
