Plasmodium prevalence

Gonz, Merit, alez-Olvera, Hernandez-Colina, Arturo, Himmel, Tanja, Eckley, Lindsay, Lopez, Javier, Chantrey, Julian, Baylis, Matthew & Jackson, Andrew P., 2022, Molecular and epidemiological surveillance of Plasmodium spp. during a mortality event affecting Humboldt penguins (Spheniscus humboldti) at a zoo in the UK, International Journal for Parasitology: Parasites and Wildlife 19, pp. 26-37 : 29

2.11. Statistical analysis of parasite prevalence and mosquito abundance

To examine the association of months and sampling areas with mosquito abundance and parasite prevalence in mosquitoes, data were consolidated by sampling week. As data were overdispersed and not normally distributed (Anderson-Darling normality test, p <0.001), a generalised linear model was constructed with a quasipoisson family for abundance analysis and with a quasibinomial family for prevalence analysis. Initially, month, area and their interaction were used as explanatory variables, but as their interaction showed no relevant effects, it was removed and final models were constructed for months and areas separately. To compare the prevalence between mosquito species, a Chi-squared test of independence was carried out.