title: Sequence analysis of Orientia tsutsugamushi DNA from mites collected in the Xisa archipelago, China.
abstract: The genotype of Orientia tsutsugamushi DNA from mites in the Xisa archipelago of China were identified. A natural focus of tsutsugamushi disease in the archipelago was found. The DNA sequence that codes for the 56 kDa protein of O. tsutsugamushi was amplified by nested polymerase chain reaction (N-PCR). The purified positive products were cloned into a pGEM-T vector and sequenced. The DNA sequence was compared with various sequences on the internet for sequence homology. A 507 bp DNA fragment encoding the 56 kDa protein was amplified from the samples. The sequence homology was 85% (Karp strain), 68% (Gilliam strain), 65% (Kato strain), and 67% (Yonchon strain). Orientia tsutsugamushi is carried by the mites of the Xisa archipelago; the main genotype is the Karp strain.
authors.affiliation: Department of Epidemiology, Medical Institute of Guangzhou Command PLA, Yanling, Guangzhou, People's Republic of China.
authors.forename: Shan-Shan
authors.initials: SS
authors.lastname: Wang
authors.forename: Dao-Cheng
authors.initials: DC
authors.lastname: Zhan
authors.forename: Gui-Fu
authors.initials: GF
authors.lastname: Peng
authors.forename: Hua
authors.initials: H
authors.lastname: Pan
authors.forename: Hong
authors.initials: H
authors.lastname: Xiao
authors.forename: Nian-Hua
authors.initials: NH
authors.lastname: Zeng
authors.forename: Jia-Liang
authors.initials: JL
authors.lastname: Huang
authors.forename: Zhi-Bing
authors.initials: ZB
authors.lastname: Wang
mesh_terms: D000818:Animals; D015373:Bacterial Typing Techniques / Q000379:methods*; D002681:China; D004269:DNA, Bacterial / Q000032:analysis; D005838:Genotype; D006801:Humans; D008925:Mites / Q000382:microbiology*; D012285:Orientia tsutsugamushi / Q000145:classification* / Q000235:genetics*; D012150:Polymorphism, Restriction Fragment Length; D012016:Reference Values
chemical_list: D004269:DNA, Bacterial