Epidemiological characteristics of tsutsugamushi disease in Oita Prefecture, Japan: yearly and monthly occurrences of its infections and serotypes of its causative agent, Orientia tsutsugamushi, during 1984--2005

Microbiology and Immunology
Masao Ogawa, Testuro Ono

Abstract

Using indirect immunofluorescence assay, we examined the sera of 561 patients from November 1984 to February 2005 to determine the incidence of tsutsugamushi disease (scrub typhus) in Oita Prefecture, Japan. The results obtained were positive in 384 individuals (68.4%). Municipalities where patients were presumed to have been infected with Orientia tsutsugamushi were Taketa City (41.7%), Oyama Town (13.5%), and Ogi Town (8.3%). Infections occurred most often in October, November, and December. A small number of cases occurred from January to May. The serotypes Kuroki (47.5%), Kawasaki (42.5%), and Karp (10.0%) were detected by genetic analysis of O. tsutsugamushi DNA extracted from the blood of 120 patients. The gene sequences of the Kuroki type were highly homologous to that of the Nishino strain. The gene sequences of the Kawasaki type were identical to that of the Kawasaki strain. The gene sequence of the Karp type was highly homologous to that of the JP-2 type. To determine the distribution of vector mites, 558 wild rodents were captured and 72010 mites attached to these rodents were collected from 1982 to 1998. Six genera and 16 species of trombiculid mites were collected. Leptotrombidium pallidum and L. scutellare, which ...Continue Reading

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Citations

Oct 11, 2013·Vector Borne and Zoonotic Diseases·Satoru AraiKazunori Oishi
Dec 3, 2015·Parasites & Vectors·Chi-Chien KuoHsi-Chieh Wang
Aug 25, 2009·International Journal of Infectious Diseases : IJID : Official Publication of the International Society for Infectious Diseases·Hiromichi IwasakiTakanori Ueda
Jul 31, 2013·International Journal of Infectious Diseases : IJID : Official Publication of the International Society for Infectious Diseases·George M VargheseDilip Mathai
Feb 5, 2015·Journal of Microbiology, Immunology, and Infection = Wei Mian Yu Gan Ran Za Zhi·Ko ChangYen-Hsu Chen
Apr 17, 2013·The American Journal of Tropical Medicine and Hygiene·Satoshi IkegayaTakanori Ueda
Dec 30, 2015·The American Journal of Tropical Medicine and Hygiene·Yi-Cheng WuShen-Long Li
Nov 4, 2017·PLoS Neglected Tropical Diseases·Guang XuChristine M Arcari
Feb 17, 2017·Journal of Clinical Microbiology·Wiwit TantibhedhyangkulYupin Suputtamongkol
Oct 10, 2018·The American Journal of Tropical Medicine and Hygiene·Eiichiro SandoKoya Ariyoshi
Nov 21, 2014·Japanese Journal of Infectious Diseases·Ji-Hyuk ParkJin Gwack
Jan 15, 2021·Journal of Rural Medicine : JRM·Yusuke WatanabeMasayuki Kojima

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