Sequence analysis of Orientia tsutsugamushi DNA from mites collected in the Xisa archipelago, China.
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.
Wang
Shan-Shan
SS
Department of Epidemiology, Medical Institute of Guangzhou Command PLA, Yanling, Guangzhou, People's Republic of China.
Zhan
Dao-Cheng
DC
Peng
Gui-Fu
GF
Pan
Hua
H
Xiao
Hong
H
Zeng
Nian-Hua
NH
Huang
Jia-Liang
JL
Wang
Zhi-Bing
ZB
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
D004269:DNA, Bacterial