Investigation of serum epidemiology from the plague foci population in Leizhou island,Guangdong

Objective To explore the distribute of plague FI-antibody positive people from plague foci population in Leizhou island . Methods The serum samples from 121 people in Leizhou island plague foci and 200 people in the non-plagued foci area were routinely detected by indirect hemagglutination(IHA). Results 12 samples were positive of plague FI antibody in 121 serum samples from the plague foci in Leizhou island ,the positive rate being 9.91%,200 serum samples of healthy people from non-plagued foci were all negative. Conclusions Serum FI-antibody positive people are popular in the plague foci ,at over the age of 50 old .Which is it ,plague-vaccinated or the hidden infected before 50 years. There is no doubt it was local animate plague that are not prevalent in the areas of serum FI-antibody positive people ,especially in recent years.