A total of 7210 unfed adult Ixodes persulcatus Schulze, 1930 and I. ricinus (L., 1758) ticks were collected from the vegetation by flagging in 35 study sites located in the zone of their sympatry (mainly in Leningrad region, Russia). Borrelia infection in ticks was estimated by the dark-field microscopic analysis of gut contents in standard vital preparations at a magnification of x600. No correlation was revealed between the series of parameters characterising the abundance of each tick species (tau = -0.13) and between the series of these parameters and the prevalence of Borrelia in each vector. It is concluded that in the broad zone of I. persulcatus and I. ricinus sympatry, the presence and proportion of one vector in the ecosystem does not have any significant effect on the extensity of infection and on the epizootic and epidemic significance of the other vector. Each tick species has its independent (of the other species) and relatively original functional role in the focal ecosystem.
- MeSH
- Borrelia burgdorferi komplex izolace a purifikace MeSH
- členovci - vektory mikrobiologie MeSH
- ekosystém MeSH
- klíště mikrobiologie MeSH
- statistika jako téma MeSH
- zvířata MeSH
- Check Tag
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Geografické názvy
- Rusko MeSH
To rank variables affecting risk of human disease due to tick-borne encephalitis (TBE) virus in the Russian Far East, we compared annual changes in (1) frequency of human contact with vector ticks, (2) prevalence of infection in the tick population and (3) quantity of virus present infected ticks. Sites were sampled uniformly over a 4-year period in a forested region where Ixodes persulcatus serves as the principle vector. The questing density of ticks on vegetation remained relatively constant during the course of this study. The frequency of contacts of the local human population with ticks carrying different doses of the TBE virus was changeable. The rate of TBE infection of humans in the study site corresponded to that of human contacts with highly infected ticks. The density of highly infected ticks represents the principal parameter for determining potential epidemiological significance of a natural TBE focus.
- MeSH
- arachnida jako vektory virologie MeSH
- infestace klíšťaty epidemiologie MeSH
- klíště virologie MeSH
- klíšťová encefalitida epidemiologie přenos MeSH
- kousnutí a bodnutí epidemiologie MeSH
- lidé MeSH
- pravděpodobnost MeSH
- prevalence MeSH
- rizikové faktory MeSH
- rostliny parazitologie MeSH
- viry klíšťové encefalitidy izolace a purifikace MeSH
- zvířata MeSH
- Check Tag
- lidé MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- Research Support, U.S. Gov't, P.H.S. MeSH
- Geografické názvy
- Rusko MeSH
Seven strains of the causative agent of Lyme borreliosis have been isolated from ticks of the species Ixodes ricinus (L.) obtained at the territories of Leningrad Province, Lithuania and Czechoslovakia. The strains have been studied in reactions with 5 types of monoclonal antibodies. All isolated strains belong to serotype II according to Barbour's system and are typical for European strains.
- MeSH
- Borrelia burgdorferi komplex klasifikace izolace a purifikace MeSH
- klíšťata mikrobiologie MeSH
- monoklonální protilátky MeSH
- sérotypizace MeSH
- zvířata MeSH
- Check Tag
- zvířata MeSH
- Publikační typ
- anglický abstrakt MeSH
- časopisecké články MeSH
- srovnávací studie MeSH
- Geografické názvy
- Československo MeSH
- Litva MeSH
- Rusko MeSH
