In the present study complete blood cell count was performed in samples from 100 dogs positive for helminths and/or protozoa in fecal examination, to identify possible abnormalities related to intestinal parasitism. For parasitological diagnosis, the samples were subjected to the sieving method and further analyzed through the techniques of Willis, Faust and Hoffman. The blood counts were performed with the aid of an automated hematology analyzer and morphological evaluation by blood smear stained with rapid Panotic kit using optical microscopy bright field. The analysis of fecal samples revealed that the parasite Ancylostoma sp. was more frequent (42%), followed by Cystoisospora sp. (20%), Giardia sp. (20%), Giardia and Cystoisospora (4%), Toxocara sp. (3%), Ancylostoma and Giardia (3%), Dipylidium caninum (Linnaeus, 1758) (2%), among others (6%). The most common abnormalities found wer...