| frequency of intestinal parasites in pet dogs from an urban area (greater oporto, northern portugal). | the present study was conducted to evaluate the prevalence of gastrointestinal parasites in dogs with no clinical signs (n=175; group h) and in dogs with gastrointestinal disease (n=193; group d) that were admitted to a veterinary hospital. in group h, the overall prevalence of intestinal parasites (i.e. the presence of at least one species) was 20.6%. cystoisospora canis was the most prevalent protozoon (8.0%) followed by giardia spp. (7.4%); toxocara canis (5.1%) was the most frequent helminth ... | 2014 | 24433853 |