The occurrence of avian blood protists is affected by multiple factors that include the characteristics of the hosts, the vectors, the parasites, as well as the environmental factors. This study provides an insight into some of the factors that influence the prevalence of avian Lankesterella, neglected but common blood parasites in breeding populations of common passerines. The highest prevalences of Lankesterella infection were observed in 1 great tit (Parus major) population at 63%, 1 blue tit (Cyanistes caeruleus) population at 49% and a sedge warbler (Acrocephalus schoenobaenus) population at 33%. Prevalence was found to be significantly influenced by sampling site followed by host age, species and sex. Julian date had no significant effect on Lankesterella prevalence. Prevalence data from different sampling sites can reveal different patterns and should be combined critically. Higher prevalence in adults suggest that the infections are chronic, which helps the parasite to persist in host populations. The differences between sexes might be related to different exposure to the transmitting vectors (e. g., mites or mosquitoes) during breeding.

Department of Ecology Faculty of Environmental Sciences Czech University of Life Sciences Praha Czechia

Department of Parasitology Faculty of Science Charles University Praha Czechia

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