[An experimental study of the capacity of the rat mite Ornithonyssus bacoti (Hirst, 1913) to ingest, maintain and transmit Borrelia]. / Eksperimental'noe izuchenie sposobnosti krysinogo kleshcha Ornithonyssus bacoti (Hirst, 1913) vosprinimat', sokhraniat' i peredavat' borrelii.

For the first time a possibility of the gamasina mites' O. bacoti participation in Lyme disease spirochetes' circulation has been demonstrated. It has been experimentally shown that Borrelia burgdorferi s.l. are received by O. bacoti, survive in them for at least 21 days and are transmitted to white mice through mites' bites. Mice's infestation has occurred in 23% of cases. It is suggested that other bloodsucking gamasina mites inhabiting the Lyme borreliosis reservoir rodents nests may be capable of participating in borrelia circulation in the Lyme disease endemic areas.

[The gamasid mites (Parasitiformes: Mesostigmata) of small mammals from undeveloped land in Moscow]. / Gamazovye kleshchi (Parasitiformes: Mesostigmata) melkikh mlekopitaiushchikh nezastroennoi territorii Moskvy.

On 11 species of small mammals collected in the parks and ruderal areas of Moscow in 1964-1991, 35 species of mites were revealed. Among them 23 species were parasitic. Laelaps hilaris, Haemogamasus nidi, and Androlaelaps glasgowi were predominant. The mite species diversity on small mammals in Moscow is similar to that in natural environments. The epidemiological and epizootiological significance of revealed species of mites is discussed. The rat mite Ornithonyssus bacoti has the major medical importance as the pathogen of the rat mite dermatitis in Moscow and as a vector of transmissive diseases. According to literature and the data obtained the favorable conditions for maintenance of transmissive diseases reservoirs exist permanently in Moscow.

[The finding of larvae of the taiga tick Ixodes persulcatus (Parasitiformes: Ixodidae) on necrophagous piophilid flies (Diptera: Piophilidae) in the southern Yamal]. / O nakhodke lichinok taezhnogo kleshcha Ixodes persulcatus (Parasitiformes: Ixodidae) na nekrofil'nykh mukhakh-piofilidakh (Diptera: Piophilidae) na Iuzhnom Iamale.

In course of mass collecting of necrophilous flies by means of cage traps with a bites of dead small mammals in South Yamal, at latitude 67 North, 3400 dipterans were caught and examined on mite phoresy. Among them two piophilid specimens with two attached Ixodes persulcatus larvae have been recovered.

[The fauna, number and spatial distribution of mites (Acari) in house dust in Moscow]. / Fauna, chislennost' i prostranstvennoe raspredelenie kleshchei (Acari) bytovoi pyli v Moskve.

There is a wide and strong allergenic background in Moscow, which is determined by relatively high population density and regular frequency of the allergenic mites in various premises. 34 species have been identified, 5 of them are allergen producers. The mites of the family Pyroglyphidae are the main component of the house dust fauna. Dermatophagoides pteronyssinus and D. farinae distributed all over the world are predominate. A comparative evaluation of the fauna structure, numbers and frequency of the allergenic mites in the flat dust of the allergic patients and healthy people as well as premises is given. Possible importance of the premises in prevalence and circulation of the allergenic mites in the modern town is estimated for the first time.

[Seasonal changes in the population count of allergenic mites (Acariformes, Pyroglyphidae) in the dust of living quarters in the city of Moscow]. / Sezonnoe izmenenie chislennosti populiatsdii allergennykh kleshchei (Acariformes, Pyroglyphidae) v pyli zhilykh pomeshchenii goroda Moskvy.

The seasonal dynamics of allergenic mite quantity in house dust of three model apartments in Moscow has been observed during three years. Two periods of increase in mites' quantity have been revealed: wintry and summer-autumnal. Mite breeding takes place both in winter and in summer-autumnal period. The quantity variations of allergenic mites are cyclic and have individual traits peculiar to each population of these mites.