Detection of Intestinal Parasites in Stray Dogs from a Farming and Cattle Region of Northwestern Mexico

Stray dogs are one of the main reservoirs of intestinal parasitic infections and some have zoonotic potential. An epidemiological survey was carried out between September 2017 and May 2018 in Mexicali Valley, this area sacrifices around 92,470 head of cattle monthly, which represents 27% of the national slaughter and has 71,307 hectares for crops. In this period the Municipal Animal Control Center during their routine visits to the Mexicali Valley captured 103 dogs. All the dogs were evaluated using copromicroscopic techniques to detect intestinal parasites. The general frequency of parasitic infections was 28.15% (29/103), the most frequent parasite being <i>Dipylidium caninum</i> 16.50% (17/103), followed by <i>Taenia</i> spp. 6.79% (7/103), <i>Taenia hydatigena</i> 2.91% (3/103), <i>Taenia serialis</i> 0.97% (1/103), <i>Taenia pisiformis</i> (0.97%)<i>,</i> <i>Toxocara canis</i> 3.88% (4/103), <i>Toxascaris leonina</i> 1.94% (2/103), and <i>Cystoisospora</i> spp. 1.94% (2/103). No significant statistical associations were found between parasitic infections and the studied variables (sex, age, and size) however; there was a significant statistical association with the capture area. Most of the parasites found in this survey have potential to affect the human population and animal production.