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. Author manuscript; available in PMC: 2019 Feb 1.
Published in final edited form as: Trends Parasitol. 2017 Nov 25;34(2):102–113. doi: 10.1016/j.pt.2017.11.002

Figure 1. Invasion dynamics of Wolbachia.

Figure 1

A. Illustration of how cytoplasmic incompatibility (CI) gives Wolbachia-infected females a reproductive advantage by making the progeny of infected males and wild-type females non-viable. B. CI thus allows Wolbachia-infected mosquitoes to displace wild-type (blue curve) if introduced into a population above a threshold frequency (dashed line) which is determined by the fitness costs of Wolbachia infection. If introduced below this threshold frequency (red curve), Wolbachia-infected insects are out-competed by wild-type, despite CI.