Fig. 2From: Poor vector competence of the human flea, Pulex irritans, to transmit Yersinia pestisP. irritans infected using human blood and fed sterile human blood every 2 days. The results of two independent experiments (A, B) are shown; B was a short-term experiment in which only early-phase transmission was assessed. See Fig. 1 legend for details. No evidence of partial or complete proventricular blockage was detected in any of the fleasBack to article page