How can I test for phylogenetic signal in a discrete trait ( i.e. counts of parasites)

I am running a PGLMM with a Poisson error distribution in R to evaluate the effect of sociality (binomial) in parasite loads. I want to test for phylogenetic signal in discrete data (e.g counts of parasites in bird species). However, I found several ways of testing for phylogenetic signal on continuous data (phytools::phylosig ..pagel's, K, ) and in categorical (data ape::delta), but not much in how to test this in discrete (count data). Any ideas will be really appreciated!