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At least 19 recordsLinked to original sources
PubMed1994

Description of the larva, diagnosis of the nymph and female based on scanning electron microscopy, hosts, and distribution of Ixodes (Ixodes) venezuelensis.

The larva, nymph, and female of Ixodes (Ixodes) venezuelensis are diagnosed using scanning electron microscopy, and the larva is described for the first time. This ixodid tick is recorded from the northern neotropics as a parasite of five species of didelphid marsupials and eighteen species of rodents (one sciurid, two heteromyids, eleven murids, two dasyproctids, and two echimyids). Collection records of I. venezuelensis are presented for Costa Rica, Colombia, Panama and Venezuela, with the Costa Rican records being new and extending the known range of this tick by at least 300 km. Altitudinally, I. venezuelensis has been collected between elevations of 24 and 2410 m with most collections between 100 and 800 m. The possibility that I. venezuelensis may be parthenogenetic is discussed.

Animals↗
PubMed1992

[Investigation of rodents and Ixodes for Lyme disease and four strains of Borrelia burgdorferi first isolated from Ixodes granulatus Supino, Rattus confucianus and R. norvegicus in Fujian province].

With BSK II medium, 4 strains of Borrelia burgdorferi was isolated from Ixodes granulatus Supino, Rattus confucianus and R, novregicus, which Ixodes and Ruttus all captured from forest areas in northern of Fujian province where have found Lyme cases. These isolated strains were identified by Institute of Epidemiology and Microbiology, Chinese Academy of Preventive Medicine.

Animals↗
PubMed1995

Differences in Borrelia infections in adult Ixodes persulcatus and Ixodes ricinus ticks (Acari: Ixodidae) in populations of north-western Russia.

Dark-field microscopy was used to determine the number of Borrelia spirochetes in 630 standard preparations obtained from adult ixodid ticks (344 Ixodes persulcatus and 286 I. ricinus) collected in 1989-92 in the Leningrad region of Russia. The average numbers of Borrelia in I. persulcatus and I. ricinus preparations were 34.7 and 23.3 per 100 microscopic fields, respectively. The maximal individual values registered each year for ticks of both species were several hundred times greater than the minimal values. Ticks carrying relatively small numbers of Borrelia generally predominated. Proportions of more heavily infected ticks varied considerably from year to year. These parameters were significantly higher in foci with predominance of I. persulcatus ticks. As a consequence, risk to acquire Lyme borreliosis in such foci is considered greater than in foci where I. ricinus predominates.

Animals↗
PubMed1992

First report of Ixodes (Ixodes) minor Neumann (Acari: Ixodidae) from South Carolina.

Previous reports from the literature have indicated the northernmost range of extension of Ixodes minor Neumann to be southern Georgia with the greatest number of collections having been made in the coastal regions of that state. An unpublished record in the U.S. National Tick Collection indicated that I. minor had been collected as far north as South Island, Georgetown County, S.C., as early as 1933. I. minor was collected on three separate occasions in Charleston County, S.C., between October 1990 and February 1991, thus verifying the northern extension of this tick's range and the probable existence of a stable population on the coast of South Carolina. The roof rat (Rattus rattus) is reported for the first time serving as a host for I. minor.

Animals↗
PubMed1991

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. The Japanese strains reacted with MAb U40 against the 41-kDa antigen. MAb E34a31 against Osp A reacted with all the strains tested except for strain HP3. Furthermore, MAb U31b against Osp A reacted with all the American and European strains but did not react with the Japanese strains. When MAbs against Osp B were used, MAb E34b reacted only with European strains and MAb U34b reacted only with the American strains. However, neither showed reactivity to two Japanese strains. MAb E60 against 60-kDa antigen reacted with all the U.S. and European strains and strain HP3 but did not react with Japanese strain HO14. These results indicate that the antigenicity of the Japanese strains isolated from two species of ixodid ticks is different from that of the strains isolated in the United States and Europe. It is suggested that the Japanese strains are much more suitable than the U.S. or European strains as the antigen source for the serodiagnosis of Lyme disease in Japan.

Animals↗
PubMed1992

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 regard to the type of 30-kD OspA protein, and were different from the I. persulcatus isolates in their protein composition. These data suggest that the transmission cycle of B. burgdorferi in I. ovatus is not related to that in I. persulcatus. No cases of Lyme disease transmitted by I. ovatus have been confirmed in Japan, in spite of the abundance of human tick bites by this species. Accordingly, the spirochetes of I. ovatus are thought to be a variant of B. burgdorferi with low virulence.

Animals↗
PubMedDate not supplied

Ultrastructure of spirochetes isolated from Ixodes ricinus and Ixodes dammini.

Two strains of Ixodes spirochetes, one isolated in the United States (B31) and the other in Sweden (G25), were examined by electron microscopy. Cells of strain G25 were 11-25 micron long with a wavelength of 2.1-2.4 micron and an amplitude of 0.4 micron. Eleven flagella were inserted subterminally at each end of the cell. Cells of strain B31 were similar but had eleven or seven flagella. Cytoplasmic tubules were not seen in cells of either strain. Although not identical, both strains showed ultrastructural details characteristic of the genus Borrelia.

Borrelia↗