title: Laboratory diagnosis and genotype identification of scrub typhus from Pinggu district, Beijing, 2008 and 2010.
abstract: This study was conducted to determine the diagnosis and genotype of Orientia tsutsugamushi in Pinggu district, Beijing. Indirect immunofluorescence assay (IFA) was performed to detect O. tsutsugamushi-specific immunoglobulin M (IgM) and immunoglobulin G (IgG) antibodies. Nested polymerase chain reaction (PCR) and DNA sequencing analysis targeting the O. tsutsugamushi-specific groEL gene and 56 kDa protein gene were performed on whole-blood samples from scrub typhus patients. We confirmed that 47 patients were infected with scrub typhus in Pinggu district, Beijing. Representative sequences amplified by primers according to the groEL gene (BJ-PG-2008; GenBank accession No. JQ894502) and the 56 kDa protein gene (PG-56kDa; GenBank accession No. JX843795) both clustered with Kawasaki. PG-56kDa had sequence homology of 100% with TADY12-0308, shandong-XDM2, Neimeng-90, and sdu-1 and sequence homology of 96% with Kawasaki, Taguchi, Oishi, and Kanda. We confirmed the genotype of O. tsutsugamushi in Pinggu district, Beijing, as Kawasaki, and the patient in 2008 confirmed in this study was the first patient with confirmed scrub typhus in Beijing.
authors.affiliation: Beijing Center for Disease Prevention and Control, Beijing, People's Republic of China. liweihong@yahoo.cn
authors.forename: Weihong
authors.initials: W
authors.lastname: Li
authors.forename: Xiangfeng
authors.initials: X
authors.lastname: Dou
authors.forename: Liqin
authors.initials: L
authors.lastname: Zhang
authors.forename: Yanning
authors.initials: Y
authors.lastname: Lyu
authors.forename: Zhizhong
authors.initials: Z
authors.lastname: Du
authors.forename: Lili
authors.initials: L
authors.lastname: Tian
authors.forename: Xiuchun
authors.initials: X
authors.lastname: Zhang
authors.forename: Yulan
authors.initials: Y
authors.lastname: Sun
authors.forename: Zengzhi
authors.initials: Z
authors.lastname: Guan
authors.forename: Lijuan
authors.initials: L
authors.lastname: Chen
authors.forename: Xinyu
authors.initials: X
authors.lastname: Li
authors.forename: Quanyi
authors.initials: Q
authors.lastname: Wang
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000907:Antibodies, Bacterial / Q000276:immunology; D001483:Base Sequence; D002681:China / Q000453:epidemiology; D005260:Female; D019084:Fluorescent Antibody Technique, Indirect; D005838:Genotype; D006801:Humans; D007074:Immunoglobulin G / Q000276:immunology; D007075:Immunoglobulin M / Q000276:immunology; D008297:Male; D008875:Middle Aged; D008969:Molecular Sequence Data; D012285:Orientia tsutsugamushi / Q000235:genetics* / Q000276:immunology; D010802:Phylogeny; D016133:Polymerase Chain Reaction; D012612:Scrub Typhus / Q000175:diagnosis* / Q000453:epidemiology / Q000276:immunology / Q000382:microbiology; D055815:Young Adult
chemical_list: D000907:Antibodies, Bacterial; D007074:Immunoglobulin G; D007075:Immunoglobulin M