Finally, as previously documented, the global prevalence of FIV differs greatly between sexes (23% in males compared to 9% in females), with an average FIV prevalence in the entire study area of approximately 16%. There is significant variability in FIV prevalence between populations, especially in males, where data show significant extra-Binomial dispersion (Fisher's exact test with Table 1 . Total number of sampled cats, adult sex-ratio, number of FIV seropositive individuals (FIV+) and mean age of captured males and females in each population. 