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Prevalence and molecular characterization of Cyclospora cayetanensis, Henan, China

Yang Zhou1, Biao Lv, Qiang Wang

  • 1College of Animal Science and Veterinary Medicine-Henan Agricultural University, Zhengzhou, People's Republic of China.

Emerging Infectious Diseases
|October 18, 2011
PubMed

Insights

Cyclospora cayetanensis infection was found in 0.70% of hospital patients in Henan, China. This parasitic infection affected all age groups, with most cases occurring during summer months.

Area of Science:

  • Medical Parasitology
  • Infectious Diseases
  • Epidemiology

Background:

  • Cyclospora cayetanensis is an opportunistic parasite causing diarrheal illness.
  • Understanding its prevalence is crucial for public health interventions.
  • Data on Cyclospora infection in China remains limited.

Purpose of the Study:

  • To determine the prevalence of Cyclospora cayetanensis infection in Henan, China.
  • To characterize the demographic and seasonal distribution of cases.
  • To analyze genetic variations within the parasite.

Main Methods:

  • Cross-sectional study involving 11,554 hospital patients in Henan, China.
  • Microscopic examination and potentially molecular methods for Cyclospora detection.
  • Sequencing of the 18S rRNA gene for 35 isolates.

Main Results:

  • A prevalence of 0.70% (95% CI: 0.70% ± 0.15%) was identified.
  • Infection was observed across all age groups.
  • Peak incidence of cases occurred during the summer season.
  • Minor sequence polymorphisms were detected in the 18S rRNA gene of characterized isolates.

Conclusions:

  • Cyclospora cayetanensis infection is present in Henan, China, affecting diverse age groups.
  • The summer seasonality suggests potential transmission routes linked to environmental or food factors.
  • Genetic analysis reveals minimal variation, indicating a potentially homogenous circulating strain.

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