| 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 ... | 1992 | 1495032 |
| organization of ribosomal rna genes in borrelia burgdorferi sensu lato isolated from ixodes ovatus in japan. | borrelia burgdorferi sensu lato was obtained from adult ixodid ticks, ixodes ovatus, collected in nagano, japan, and was named nt112. the genomic dna was digested with enzymes, electrophoresed, blotted and hybridized with rrna gene probes obtained from b. burgdorferi sensu stricto b31. the results showed that the borrelial chromosome contains a single rrs (16s rrna gene) sequence and two copies of rrl/rrf (23s/5s rrna genes) sequences. the rrl/rrf genes were tandemly repeated at intervals of 3.2 ... | 1993 | 7507551 |