Investigation of serum epidemiology from the high-danger plague population in Huangyuan County, Qinghai Province

Objective To explore the hidden infected plague situation among the high-danger population. Methods The serum samples from 150 people in high-risk plague area and 116 in low-risk area were routinely detected by indirect hemagglutination(IHA), adopting the Chinese Plague Diagnosis Standard of GB 15991-1995. Results 17 samples were positive of plague F1 antibody in 150 serum samples from the high-danger population, the positive rate being 11.33%. 116 serum samples of healthy people from non-plagued area were all negative. Conclusions Serum F1﹣positive people are popular in the high-danger population ,thus measurements should be taken to prevent further infection in the process of catching Marmota himalayan.