Fig. 2.

Effects of a 1-min exposure to the urine odors of male mice. (A) Initial day 1 odor choices of OTWT and OTKO females (n = 30) provided with H. polygyrus-infected male − uninfected male stimulus odor combinations. The stimulus odors were presented either in association with the odor of an estrous females (female, ♀) or without a female odor (no female). (B) On day 2, the females (n = 15) were retested and given a choice between the odors of an unfamiliar infected male (infected novel) and uninfected male, or the odors of an uninfected male and a familiar infected male (male that had on day 1 been associated with a female odor).