Proportions of antigen and antibody positive and/or negative individuals who participated in the 3 sampling rounds.

aCI = Binomial exact 95% Confidence Intervals; SR = sampling round;bSR 1 = June 2009 sampling,cSR 2 = November 2009 Sampling;dSR 3 = July 2010 Sampling.

aCI 指代二项精确95%置信区间（Binomial exact 95% Confidence Intervals）；SR 指代采样轮次（sampling round）；其中，标记为b的采样轮次1（SR 1）为2009年6月采样，标记为c的采样轮次2（SR 2）为2009年11月采样，标记为d的采样轮次3（SR 3）为2010年7月采样。