The greatest risk of zoonotic transmission appears to be from companion animals such as dogs and cats, although further studies are required in different endemic foci in order to determine the frequency of such transmission.PMID: 15567577 [PubMed - indexed for MEDLINE] SharePublication Types, MeSH Terms, SubstancesPublication TypesReviewMeSH TermsAnimalsAnimals, Domestic/parasitologyCatsDogsGiardi