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Some intestinal dog parasites represent a worldwide problem for human health due to their biotic and zoonotic potential. Metropolitan areas with high concentrations of dogs can be a health risk because of soil contamination with fecal matter. The objective of this study was to determine the presence of zoonotic intestinal parasites in dog feces and soil in the Chapultepec Forest of Mexico City. 210 fecal samples were examined by using the flotation method and direct smear stained with Zhiel Neelsen. Simultaneously, 150 soil samples were studied by means of the Ferreira method. The results were analyzed by using SPSS, version 21, and a chi-square test. The prevalence of fecal parasites was 51.5%. The prevalences of zoonotic parasites were: T. canis 34.8%, A. caninum 16.7%, and Cryptosporidium spp. 2.4%. The prevalence of eggs of T. canis in soil samples was 9.3%. Contamination of the forest surface with infectious forms of zoonotic parasites can be a source of infection for visitors, especially children. It is important to implement information and prevention campaigns for zoonotic infection control through health education of the population, in general, and of pet owners, in particular, as well as canine population control.

Presence of Zoonotic Helminths in Dog Feces and Soil in the Chapultepec Forest of Mexico City