Cross-sectional survey and analysis of the epidemiology of Ovine Q fever and Chlamydia abortus in Yulin Region,2024
Hao Yuqing
Liu Wanhua
Xue Jiuzhou
Gao Yan
Han Bin
Abstract：This study aimed to investigate the infection and prevalence of Q fever and Chlamydia abortus in sheep within the Yulin region.Using a two-stage probability sampling method,ovine serum samples were collected from large-scale farms across eight counties/districts.A total of 1 853 serum samples from 109 sheep farms were tested for antibodies against Q fever and Chlamydia abortus using enzyme-linked immunosorbent assay(ELISA).Additionally,polymerase chain reaction(PCR)was employed to detect Coxiella burnetii(Q fever pathogen)in 10 vaginal swab samples from aborted ewes and Chlamydia abortus in six samples.Results showed individual and flock-level positivity rates for Q fever antibodies were 11.98%and 38.53%,respectively,while for Chlamydia abortus antibodies,rates were 12.14%(individual)and 43.12%(flock-level).The individual co-infection rate was 8.90%.Pathogen detection revealed 4/10 samples positive for Q fever nucleic acid and 5/6 samples positive for Chlamydia abortus nucleic acid.This study indicates widespread infections of Q fever and Chlamydia abortus in Yulin sheep,urging heightened attention from authorities and farms.
Keywords：Q feverChlamydia abortusCross-sectional surveyYulin region
Publication Date：2025-07-15
Online Publishing Date：2025-08-22(First online date of this platform, not the publication date of the document)
Pages：5( 64-68 )