作者
Miao Lu,Xin-Cheng Qin,Yongzhong Jiang,Qin Guo,Xiao-Jing Jin,Zhongqiu Teng,Xiangrong Sun,Liang Yu,Yun‐Fei Zhang,Wen Wang,Qingqing Chen,Junrong Liang,Jun Wei,Hongyan Ren,Yong Lv,Yanhua Wang,Yi Long,Hong-Wei Chang,Da-Yin Hong,Cheng Zheng,Xingxing Lian,Kun Li,Pei-Xing Xu,Bin Wen,Biao Kan,Jianguo Xu,Tian Qin
摘要
ObjectivesFrom March to June 2021, the reported number of clinically diagnosed endemic typhus in Anhui and Hubei provinces of China nearly increased four-fold compared with the monthly average numbers in last 5 years. An etiological and epidemiological investigation was initiated.MethodsThe clinical specimens from the reported patients and the potential vector ticks were collected for molecular and serological detection, as well as cell culturing assay to identify the potential pathogen.ResultsPolymerase chain reaction and sequence analysis of rrs and groEL showed that the pathogen from these patients was Ehrlichia sp., isolated from Haemaphysalis longicornis attached to these patients. The phylogenetic analysis based on 39 Ehrlichia genomes suggested that it should be taxonomically classified as a novel species, tentatively named “Candidatus Ehrlichia erythraense”. A total of 19 of 106 cases were confirmed as Candidatus Ehrlichia erythraense infections by polymerase chain reaction, sequencing, and/or serological tests. The most frequent symptoms were fever (100%), rashes (100%), asthenia (100%), anorexia (100%), and myalgia (79%).ConclusionThe occurrence of the disease presenting with fever and rashes in Anhui and Hubei provinces was caused by a novel species of the genus Ehrlichia; physicians need to be aware of this newly-discovered pathogen to ensure appropriate testing, treatment, and regional surveillance.