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Epidemiological and clinical characteristics of scrub typhus in Guizhou Province, China: An outbreak study of scrub typhus

  • 0National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, People's Republic of China.
Plos Neglected Tropical Diseases +

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March 5, 2024

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March 5, 2024

View abstract on PubMed

Summary

This summary is machine-generated.

Scrub typhus (ST) outbreaks are increasing in China. A Guizhou Province epidemic revealed Karp strain Orientia tsutsugamushi, linked to wild mice, highlighting regional public health risks.

Area Of Science

  • Infectious Diseases
  • Epidemiology
  • Microbiology

Background

  • Scrub typhus (ST) cases are rising, posing a significant public health challenge.
  • Regional outbreaks in China necessitate urgent investigation into ST epidemiology and clinical manifestations.

Purpose Of The Study

  • To investigate an ST outbreak in Rongjiang County, Guizhou Province, China.
  • To identify the causative agent and its transmission dynamics.
  • To characterize the clinical and laboratory findings of the affected patients.

Main Methods

  • Epidemiological investigation and blood tests were conducted on fever patients.
  • Clinical symptoms, laboratory parameters (CRP, neutrophils, ALT, AST), and electrocardiogram (ECG) activity were analyzed.
  • Semi-nested PCR, Sanger sequencing, and phylogenetic tree construction identified the pathogen and its origins.

Main Results

  • 13 out of 21 fever patients were diagnosed with ST.
  • Common symptoms included fever, chills, headache, eschar, fatigue, and pneumonia.
  • Orientia tsutsugamushi (Karp strain) was identified as the pathogen, with wild mice implicated in transmission.
  • Elevated inflammatory markers and nearly half of patients showed abnormal ECGs.

Conclusions

  • This study reports the first ST epidemic in Guizhou Province, detailing its clinical characteristics.
  • The Karp strain of O. tsutsugamushi, transmitted by wild mice, is the cause.
  • Findings are crucial for regional ST prevention and treatment strategies.