[Prevalence of infection and its risk factors in Tengchong City, Yunnan Provine: a hospital-based study].

Objective: To understand the infection status and risk factors of in inpatients in Tengchong City, Yunnan Province.

Methods: A cross-sectional study was conducted in the inpatients in Tengchong People's Hospital, Yunnan Province. After obtaining the informed consent from the subjects, the stool samples were collected from 2016-07-01 to 2017-03-31, and nested polymerase chain reaction (PCR) was used to detect in the stool samples. Meanwhile, a structured questionnaire was used to record the demographic information and clinical symptoms for the patients.

Results: Totally 507 cases were recruited, and the detection rate of was 1.97% (10/507, 95% : 1.07%-3.59%) in all subjects. There were no significant differences between the inpatients with and without infection in the height ( = -0.40, = 0.69), weight ( = -0.34, = 0.73), body mass index ( = -0.40, = 0.69) and age ( = -1.48, = 0.14). Chronic diarrhea ( = 21.43, 95% : 5.04-91.23) and daily drinking water ( = 11.28, 95% : 2.79-45.56) were relevant to infection. No significant association was observed between infection and the clinical symptoms, such as abdominal distension ( = 0.70, 95% : 0.09-5.56), inappetence ( = 0.50, 95% : 0.06-4.02), itchy skin ( = 0.79, 95% : 0.10-6.38), perianal pruritus ( = 1.74, 95% : 0.21-14.07), and constipation ( = 0.91, 95% : 0.13-7.33).

Conclusions: infection is high in inpatients in Tengchong City, Yunnan Province, and chronic diarrhea and drinking unboiled water were highly correlated with infection.