Medzykhovskiĭ G A, Grazhdanov A K, Andriushchenko V V, Tanitovskiĭ V A
Med Parazitol (Mosk). 2001 Jul-Sep(3):39-44.
In the trans-Uralian steppe focus, the manifestations of plague are characterized by a cyclical pattern. Nine epizooties, each lasting 1 to 16 years, were identified in this region in 1913 to 1992. The interepizootic periods varied from 1-3 to 17 years. Plague was most commonly manifested in the south of the focus (8 cycles) in the mixed habitats of small sousliks, giant and minor day jirds. Since the 1960s when there were steady-state habitats of giant day jirds in this region, the interepizootic periods have reduced to 4 years. In the north of the focus, plague was much less frequently registered (4 cycles) in the habitats of minor day jirds and the maximum interepizootic period was 36 years. The topography of epizooties shows an irregular pattern of their spatial arrangement and a pronounced confinement to specific sites of the area. Differentiation of epizootic sectors by the incidence of recurrent plague and its duration makes it possible to identify the "cores" of epizooties at these sites.
在跨乌拉尔草原疫源地，鼠疫的表现具有周期性模式。1913年至1992年期间，该地区共发现9次动物流行病，每次持续1至16年。两次动物流行病之间的间隔时间从1至3年到17年不等。鼠疫最常出现在疫源地南部（8个周期），在那里，小黄鼠、大沙鼠和小沙鼠的混合栖息地中。自20世纪60年代该地区出现稳定的大沙鼠栖息地以来，两次动物流行病之间的间隔时间已缩短至4年。在疫源地北部，小沙鼠栖息地中鼠疫的记录频率要低得多（4个周期），两次动物流行病之间的最长间隔时间为36年。动物流行病的地形显示出其空间分布的不规则模式，并且明显局限于该地区的特定地点。根据复发性鼠疫的发病率及其持续时间对动物流行病区域进行区分，使得在这些地点识别动物流行病的“核心”成为可能。
