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antigenic properties of borrelia burgdorferi isolated from ixodes ovatus and ixodes persulcatus in hokkaido, japan.spirochete strains hp3 and ho14, isolated from ixodes persulcatus and i. ovatus in hokkaido in 1989, were the first isolates of borrelia burgdorferi, the etiological agent of lyme disease, to be recognized in japan. antigenic properties of the japanese strains were compared with those of the strains isolated in the united states (b31 and 297) and europe (irs, p/gau, p/bi, 2/b45, and 3/b56) by western blotting (immunoblotting), by using monoclonal antibodies (mabs) against strains b31 and p/bi. t ...19911761676
host substitution by ixodes persulcatus (acari: ixodidae) larvae in the years of deep depression in the abundance of small mammals.a phenomenon of host substitution by the taiga tick (ixodes persulcatus) larvae was observed by the authors in the western part of the soviet far east. in the mountain forests where the highest abundance of i. persulcatus was found, larvae usually fed on small mammals (primarily on clethrionomys rufocanus, c. rutilus and apodemus speciosus). numerous larvae were found, however, on the mountain hare (lepus timidus) in the years of deep depression in the abundance of small mammals. the host substi ...19921644364
probability models of the rate of infection with tick-borne encephalitis virus in ixodes persulcatus ticks.a total of 3,254 adults of ixodes persulcatus tick were collected in a taiga forest habitat situated in the amgun river basin (khabarovsk region, the far east, ussr) and examined individually for the presence and amount of tick-borne encephalitis virus. the over-all proportion of infected ticks was 6.6% and it varied between 3.4% and 9.4% in the years 1982 to 1985. the amount of virus per tick was approximated by the gamma distribution determining a probability that the number of plaque-forming ...19921644355
dna analysis of borrelia burgdorferi nch-1, the first northcentral u.s. human lyme disease isolate.the dna of the first northcentral united states human lyme disease isolate, borrellia burgdorferi nch-1, was characterized and compared with the dnas of nine other b. burgdorferi isolates. strain nch-1 was isolated in august 1989 from a human skin biopsy specimen. dna was analyzed by pulsed-field gel electrophoresis and restriction endonuclease analysis. contour-clamped homogeneous electric field pulsed-field gel electrophoresis of in situ-lysed cells was performed to compare the plasmid profile ...19921551988
prevalence of lyme borreliosis spirochetes in ixodid ticks of japan, with special reference to a new potential vector, ixodes ovatus (acari: ixodidae).to determine the vectors of lyme borreliosis in japan, the ixodid ticks taken in hokkaido, fukushima, nagano, ehime, and kochi prefectures were examined individually for spirochetal infections by culturing their midgut tissues in bsk medium. the cultivable spirochetes identified as borrelia burgdorferi were detected in ixodes persulcatus schulze adults (15.5% of 634), nymph (6.7% of 15) and ixodes ovatus neumann adult (9.6% of 188) from hokkaido, i. ovatus adults (25.5% of 47) from fukushima, an ...19921495032
[cyclic changes in the population count of the taiga tick in the stolby preserve].a harmonic analysis was carried out of ixodes persulcatus density dynamics over 33 years and the analysis of small mammal density and some climatic factors. it was found that the chronological changes of all the three processes contained cyclic components with the period 5.5 and 11; 3-4; 5.5 and 14-16 years, respectively. a long-term prognosis of i. persulcatus density was made based on harmonic synthesis.19921435570
[deoxyoligonucleotide probes that differentiate antigenic and pathogenetic variants of the tick-borne encephalitis virus].experiments on molecular hybridization were carried out using a panel of 11 deoxyoligonucleotide probes complementary to different parts of tick-borne encephalitis (tbe) virus, strain sophyin, genome. under study were the tbe virus strains differing by 3 criteria: (1) source of isolation (patients with acute and chronic tbe, ixodes persulcatus and d. nuttalli ticks, small mammals); (2) serotype (eastern and siberian aina/1448), (3) virulence for syrian hamsters. rna of all the strains was hybrid ...19921384240
[plant smells---important determinants in the behavior and rate of development of ixodid disease vectors].experiments with nymphs of ixodes persulcatus and dermacentor marginatus have shown that the rate and degree of engorgement, dropping off from the mouse, metamorphosis longevity and weight of emerging imagoes change under plant odour influence. the influence of acetone extract vapours of pepper, poplar buds, linden and aspen was tested. under the influence of the vapour, acting as an attractant for the adults, engorgement weight of their nymphs and the weight of imagoes emerging from them increa ...19921364524
[survey on tick vectors of lyme disease spirochetes in china].since 1987 we have been studying on lyme disease in china. there were 71 isolates of borrelia burgdorferi recovered from six species of ticks including ixodes persulcatus, ixodes granulatus, ixodes rangtangensis, haemaphysalis concinna. haemaphysalis bispinosa and haemaphysalis longicornis, and 55 isolates from ixodes persulcatus collected from heilongjiang, jilin, liaoning, nei-monggol, hebei and xinjiang region (province). ixodes persulcarus is the dominant species accounted for more than 80% ...19921300244
[differences in the distant transmission of the tick-borne encephalitis virus by ixodid ticks of 2 subfamilies].simultaneous but separate feeding of ticks on nonviremic animal (guinea pig) has shown that amblyomminae ticks are practically unable to transmit distantly tick-borne encephalitis virus (tbev) to the specimens of their own subfamily and to ixodinae as well. ixodes persulcatus and i. ricinus displayed their ability as donors and recipients of tbev (adults and nymphs) not only for their own subfamily representatives but also as donors for recipients of amblyomminae subfamily (nymphs and adults of ...19921299805
[the attraction of taiga ticks by the smell of the host's fur in nature].in the "zhigulevsky" preserve, 46 coarse calico napkins impregnated with 1 ml of an attractant, were placed alternatively as controls and experimental along the road with the interval of 5 meters. the attractant was a methanol wash-off of the hair of a mongrel dog. during 8 hour exposure the experimental napkins were attacked by 20% males and 12.5% females of active ticks living by the road (after the third experiment a complete catch of ticks was carried out). the tick distribution indirectly i ...19921299766
interpretation of a model for a ddt-treated population of ixodes persulcatus. ii. factors contributing to effectiveness of acaricide application. 19921295401
interpretation of a model for a ddt-treated population of ixodes persulcatus. i. susceptibility of ixodes persulcatus p. sch. (acarina, ixodidae) to ddt in different developmental stages and physiological states. 19921295400
comparison of borrelia burgdorferi isolated from humans and ixodid ticks in hokkaido, japan.four spirochetal isolates (jem1 to jem4) were obtained from cutaneous lesions of patients manifesting erythema chronicum migrans in hokkaido, japan. in the protein profiles by sds-page and the reactivities with monoclonal antibodies (h5332 and h9724) by immunoblotting, all the human isolates were identical with the tick isolates from ixodes persulcatus. these data indicate that i. persulcatus is an important vector of lyme disease for humans in japan.19921283437
characterization of borrelia burgdorferi isolated from ixodes persulcatus and ixodes ovatus ticks in japan.the lyme disease spirochete borrelia burgdorferi was detected in the adult stage of the ixodid ticks ixodes persulcatus and i. ovatus collected in various localities in japan. the total prevalence values were 16.6% of 777 i. persulcatus and 23.6% of 687 i. ovatus. sixty-two (63.9%) of 97 isolates from i. persulcatus contained the 30-34-kd heterogeneous outer surface protein a (ospa) that reacted with monoclonal antibody h5332. in contrast, all 128 isolates from i. ovatus were homogeneous with re ...19921279996
[erysipeloid on the islands of the sea of okhotsk. i. the sources and vectors of the causative agent of erysipeloid].the foci of the causative agent of erysipeloid at the islands of the okhotsk sea were of the polyvector and polyhostal character. there were recorded 92 species of the naturally infected by the erysipeloid causative agent invertebrate inhabitants of the sea, fish, amphibia, reptilia, birds, mammals and ectoparasites of the warm-blooded animals. gamazoid and ixodes ticks, mosquitoes, horse-flies and flees were found to be naturally infected with erysipelotrix. ixodes persulcatus were found to be ...19751199575
[ability of female ixodid ticks to recover from poisoning with ddt in the process of feeding].ability of hungary females of ixodes persulcatus, haemaphysalis concinna and dermacentor silvarum to feed and lay eggs after having been exposed to different ddt doses (ld100) has been studied. the ticks heavily injuried but still mobile can feed on the host and lay eggs, i.e. to overcome the poisoning. clutches laid by these females do not differ from control ones. loss of mobility deprives the ticks of the ability to fed. an increase in ddt dose (ld100 x 100, experiment with i. persulcatus) do ...19751187171
[behavior of the tick-borne encephalitis virus in ixodes persulcatus ticks of various origins]. 19751113709
[distribution of ixodes persulcatus p. sch. ticks on the northern slope of western saian and factors determining it. report iii. development of larvae and nymphs and the composition of ticks of various generations in the imago population]. 19751113702
[tarsal gland of ixodid ticks (ixodidae)].in the tarsi of all legs of ixodes persulcatus, dermacentor daghestanicus, rhipicephalus turanicus and hyalomma asiaticum the multicellular gland was observed. the gland is formed by a single layer of glandular cells that form a central cavity where two ciliary structures in a cuticular (scolopoid) sheath are situated. a possible function of the gland is discussed in the article.19761026913
[uneven degree of aging of intestinal epithelium of hungry ticks ixodes persulcatus].adult individuals of i. persulcatus are characterized by uneven assimilation of nutrients in digestive cells of the mid-gut. in the mid-gut of females and males exist simultaneously parts with different degrees of exhaustion. physiological age of a hungry individual is determined by three items: "main" physiological age; degrees of exhaustion "accompanying" it; and, in addition, by different degrees of exhaustion of individual digestive cells in the limits of one portion of the mid-gut. calculat ...19761023145
[absence of response of ddt by ixodes persulcatus p. sch. (parasitiformes, ixodidae)]. 19761022306
[distance orientation of the tick ixodes persulcatus to the attractant factors of the prey].the laboratory and field tests have shown that the odour is the main factor which activates ticks (ixodes persulcatus) attraction to the host. ticks have a sensation of a man on 15 metres distance; the number of activated ticks increases with the distance to the host and depends on the wind direction. the infrared radiation source excites only a short time activation of the ticks on 0.5-1.0 metres distance. mechanic and sound stimulations were found to be uneffective for the ticks in the experim ...19761018934
accumulating process and concentration ratios of ingested blood meals in larvae and nymphs of ten species of ticks.the accumulating process and concentration ratios of ingested blood meals in the larvae and nymphs of amblyomma testudinarium, haemaphysalis campanulata, h. concinna, h. formosensis, h. hystricis, h. kitaokai, the bisexual and parthenogenetic strains of h. longicornis, h. megaspinosa, and ixodes persulcatus on rabbits and argas japonicus on chickens were comparatively investigated. the larvae and nymphs of the ixodid ticks examined and the larvae of a. japonicus concentrated the ingested blood m ...1976980120
[population and a group of populations in ixodes persulcatus p. sch]. 1976940521
biological regularities of restoration of ixodes persulcatus p. sch. tick populations after eradication measures. 1977898999
residues of ddt in biogeocenoses of taiga after application of ddt for control of ixodes persulcatus p. sch. 1977898998
response of ixodes persulcatus p. sch. population to ddt and its residues. 1977898997
[electron microscopic study of haller's organ in the tick, ixodes persulcatus (ixodidae)].haller's organ consists of the capsule, in which are arranged 7 thin-walled porous olfactory hairs, and an anterior group of sensillae situated in the cuticular recess before the capsule. the anterior group is represented by one thick-walled porous, one conical, two thin and two grooved hairs. the porous hairs are characterized by "plugs", the grooved ones--by a complex system of cavities and tubules. before the organ there are hairs resembling tactile and gustatory receptors of arthropods, behi ...1977896277
[sensitivity of the females of ixodes persulcatus and dermacentor silvarum (ixodidae) to baytex and the possibility of their overcoming poisoning with this substance].females of i. persulcatus and d. silvarum are very sensitive to baytex, the value of ld50 for both species are similar. the development of injury after exposure to baytex proceeds very quickly and the subsequent stages of injury development correspond to those caused by ddt (uspensky and levikov, 1974). the overcoming of baytex poisoning during the sucking of the host's blood is possible only at the initial stage of the injury. the simulatneous feeding on the same rabbit of ticks treated with ba ...1977896262
[fertility of ixodes persulcatus p. sch. females labeled with 14c at the nymph stage]. 1977875908
[influence of temperature on the duration of the developmental cycle of ixodes persulcatus (ixodidae) ticks].experiments were conducted with ticks of i. persulcatus collected in the vicinity of khabarovsk. the females were fed at the beginning of june, hatched larvae and nymphs--after the completion of postlarval development. the ticks were maintained in testglasses at constant humidity, at temperatures of 6, 12, 15, 28 and 33c in darkness. minimum developmental periods of the ticks from egg to imago are 211 days at 28c, 732 days at 15c and 869 days at 12c. the development without diapause was not obse ...1977865882
[the antibacterial effect of organs and tissues of hyalomma dromedarii, hyalomma anatolicum and ixodes persulcatus ticks]. 1975815775
[population density of ixodes persulcatus ticks (ixodidae) in the western sikhote-alin].the paper presents data on the population density of active ticks in different landscape zones of west sykhote-alyn as well as the material on the absolute abundance of ticks in four experimental 400 m2 areas. the abundance of active ixodes persulcatus and haemaphysalis japonica on vegetation at the peak of their activity was found to amount to half of all hibernated adult ticks.1978643311
[effect of radioactive labeling on the survival of ixodes persulcatus ticks]. 1977604736
[seasonal changes in the level of fertility of female ixodes ricinus l. and ixodes persulcatus p. sch. until they land on their hosts and the significance of this phenomenon in the life of tick populations]. 1979537588
[ultrastructural characteristics of the salivary glands of the taiga tick, ixodes persulcatus (ixodidae). i. the granulosecreting alveoles of the fasting female].two types of granulosecreting alveoles were found in salivary glands of hungry females by means of electron microscopy of ultrafine sections. alveoles of the iind type occur in the anterior helf of the gland. they are not numerous and consist of three types of secretory cells (a, b, c) surrounding the inneralveolar cavity. the secretory cells are separated from each other and from the basal membrane by the strands of the epithelial cells p. three types of spherical inclusions were found in the s ...1979514626
[sources and patterns in the recovery of the numbers of the taiga tick (ixodes persulcatus, shulze, 1930) in tick-borne encephalitis foci treated with a ddt dust]. 1979460057
[migrations of ixodes persulcatus ticks from the moment of nymph satiety to activation of the vempty imagoes]. 1979460050
[comparative evaluation of the action of biologically active substances of different groups of satiated female ixodes persulcatus p. sch. (acarina, ixodidae)]. 1979431496
[ixodes persulcatus p. sch. in the natural foci of tick-borne encephalitis at the southern border of the distribution area (the kuibyshev district)]. 1978148557
[sex ratio in natural populations of imago, ixodes ricinus l. and ixodes persulcatus p. sch. (ixodoidea, ixodidae)]. 1977144853
[ecology of ixodid ticks from small mammals in the leningrad oblast].collections from rodents conducted over a period of 11 years in natural nidi of tularemia in the leningrad region include the ticks of ixodes persulcatus, i. ricinus, i. trianguliceps and i. apronophorus. the redbacked vole is the main host of i. trianguliceps larvae. the larvae of this species have two peaks of abundance, in june and september. larvae and other developmental phases of i. apronophorus were most abundant on water vole in june. larvae of i. persulcatus and i. ricinus feed on small ...1977143642
[pseudopopulations of ixodes persulcatus p. sch. in the forest-steppe zone of central povolzh'ie and the role of birds in its formation]. 1975123029
sikhote-alin virus, a new member of the cardiovirus group (picornaviridae) isolated from ixodes persulcatus ticks in primorie region.a virus, designated sikhote-alin, was isolated in 1970 from ixodes persulcatus ticks collected from a wild boar in the primorie region (u.s.s.r.) sikhote-alin virus showed no haemagglutinating activity and no antigenic relationships with arboviruses of 12 antigenic groups, 17 ungrouped tick-borne arboviruses, porcine enteroviruses and coxsackie a (types 1-18) viruses. an one-way antigenic relationship was demonstrated by complement fixation with cardioviruses (mengo and columbia-sk strains). the ...197835943
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