<p>Air dried Pv spz were immunostained with monoclonal antibody against PvCSP (NVS3) at 0.98 ng/mL as described in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0014275#s2" target="_blank">Materials and Methods</a>. The end point titer is 1∶1,024,000.</p