The epidemic of Q fever in 2018 to 2019 in Zhuhai city of China determined by metagenomic next-generation sequencing

by Mingxing Huang, Jinmin Ma, Jun Jiao, Chunna Li, Luan Chen, Zhongyi Zhu, Feng Ruan, Li Xing, Xinchun Zheng, Mengjiao Fu, Binyin Ma, Chongjie Gan, Yuanchen Mao, Chongnan Zhang, Ping Sun, Xi Liu, Ziliang Lin, Lu Chen, Zhiyu Lu, Dongsheng Zhou, Bohai Wen, Weijun Chen, Xiaolu Xiong, Jinyu Xia Q fever is a worldwide zoonosis caused byCoxiella burnetii (Cb). From January 2018 to November 2019, plasma samples from 2,382 patients with acute fever of unknown cause at a hospital in Zhuhai city of China were tested using metagenomic next-generation sequencing (mNGS). Of those tested, 138 patients (5.8%) were diagnosed with Q fever based on the presence of Cb genomic DNA detected by mNGS. Among these, 78 cases (56.5%) presented from Nov 2018 to Mar 2019, suggesting an outbreak of Q fever. 55 cases with detailed clinical information that occurred during the outbreak period were used for further analysis. The vast majority of plasma samples from those Cb-mNGS-positive patients were positive in a Cb-specific quantitative polymerase chain reaction (n = 38) and/or indirect immunofluorescence assay (n = 26). Mobile phone tracing data was used to define the area of infection during the outbreak. This suggested the probable infection source was Cb-infected goats and cattle at the only official authorized slaughterhouse in Zhuhai city. Phylogenic analysis based on genomic sequences indicated Cb strains identified in the patients, goat and cattle were formed a single branch, most closely relate...
Source: PLoS Neglected Tropical Diseases - Category: Tropical Medicine Authors: Source Type: research