| [change in the habitat of yersinia pestis in the gorno-altaisk natural focus of plague]. | the paper analyzes the change that occurred in the habitat of the causative agent of plague in its gorno-altaisk natural focus in 1961 to 2012. since 1961 when the plague microbe was found to come from the southern slopes of the saylyugem mountain range, which are located in mongolia, to the northern slopes situated in russia, a gradual expansion of the habitat of yersenia pestis subsp. altaica had commenced in south-eastern altai. during the considered period, the area where epizootic manifesta ... | 2015 | 25812401 |
| [dispersal of the flea ctenophyllus hirticrus and spreading of plague epizooties in gorny altai]. | gradual dispersion of an abundant flea species ctenophyllus hirticrus specific to the pallas's pika (the main plague carrier), is revealed in the gorno-altai natural plague focus on the territory, occupied by two populations of this lagomorph. spreading of yersinia pestis in these areas took place a short time later the rise of this ectoparasite's abundance. it is supposed that the colonization of these areas by c. hirticrus was one of the factors determined epizooties spreading within the focus ... | 2007 | 17722641 |
| [epizootological role of fleas in the gorno-altai natural plague focus (a review)]. | epizootological role of fleas in the gorno-altai natural plague focus (sailugemsk focus) and numerous data on the flea viability are analyzed and generalized. information concerning the flea natural infectivity with yersinia pestis altaica is represented. ecological peculiarities of some flea species parasitizing the main host, mongolian pika ochotona pallasi, and nature of their interrelations with y. pestis are investigated. it is shown that the flea taxocenosis provides the permanent all year ... | 2004 | 15493280 |
| [paradoxopsyllus scorodumovi (aphaniptera) flea, an effective vector of plague in a gorno-altai natural focus]. | a study was conducted on the fleas of p. scorodumovi and five local strains of the plague microbe, one of which is typical of the strains of the altai subspecies and four are non-typical of this nidus. the fleas of this species are capable to transmit not only the plague agent of the strains typical of this nidus but also non-typical ones which differ in some biological properties and are avirulent for most carriers but pallas's pika. biological peculiarities of fleas of p. scorodumovi in additi ... | 2010 | 673450 |
| the effect of amplitude modulation on the spectrum structure of the pallas's pika (mammalia, lagomorpha) sound signal. | | 2017 | 21953228 |
| [the structure of the epithelial surface of the gastrointestinal tract of pikas (ochotona pallasi and o. dauurica, lagomorpha, ochotonidae): functional and species specificity]. | the macro- and microrelief of the surface of the digestive tract mucosa of two pika species--pallas's (ochotona pallasi) and daurian (o. dauurica)--were studied in detail using whole-mount preparations and scanning electron microscopy. the structural features of the intestinal mucosal surface specific of mammals, such as the formation of projections on the crest of the cecal spiral fold and microcells in the colonic ampulla, were studied. it was found that the colonic mucosa forms sparse large c ... | 2016 | 25735180 |
| [impacts of ochotona pallasi disturbance on alpine grassland community characteristics]. | plateau pika is the main fossorial mammal in the alpine grassland in qinghai lake watershed of northwest china. based on the field investigation data from 18 alpine grassland quadrats in the watershed, and by using redundancy analysis (rda) and the surface fitting offered by 'r-vegan' , the disturbance intensity of plateau pika (ochotona pallasi) was classified as four levels. in order to explore the impacts of plateau pika disturbance on the alpine grassland ecosystem and its grazing quality, t ... | 2013 | 24380328 |
| [reduction of plant fibers in the digestive tract of two pika species (ochotona pallasi and o. dauurica, lagomorpha, ochotonidae)]. | the distribution of fibers of different sizes in the gastrointestinal tract in two species of pikas--pallas' pika ochotonapallasi and daurian pika o. dauurica--was studied. it was established that fibers of small-sized fractions dominated in all organs of the digestive tract of both pika species, the proportion of which in the stomach proved to be even higher than in fine-grinding voles. no distinct changes in the composition of the size fractions of fibers from organ to organ were observed in t ... | 2017 | 26021158 |
| nine whole-genome assemblies ofyersinia pestissubsp.microtusbv. altaica strains isolated from the altai mountain natural plague focus (no. 36) in russia. | we report here the draft genome sequences of nineyersinia pestissubsp.microtusbv. altaica strains isolated from the altai mountain plague focus (no. 36), which represent the 0.pe4 phylogroup circulating in populations of mongolian pika (ochotona pallasi). | 2018 | 29348336 |