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Prevalence of Cryptosporidium Spp. And Other Zoonotic Enteric Pathogens in Dogs of San Cristobal De Las Casas, Chiapas. México

Ignacio Martínez- Barbabosa, Hilda Ortiz Pérez, José Marcos Aguilar Venegas, Rodrigo de Jesús Pimienta Lastra, Ana María Fernández Presas


Background: Intestinal parasites with zoonotic capacity that infect dogs are a public health problem anywhere in the world, even in developed countries.

The objective of this study was to determine the presence of Cryptosporidium spp. infection and of other zoonotic enteroparasites in stray dogs captured in San Cristobal de Las Casas, Chiapas Mexico.

Materials and methods: Diagnosis was performed in 210 fecal samples by means of streaking and staining with a modified Zhiel Neelsen technique and the flotation technique by sedimentation combined with solution of zinc sulfate. To search for association among variables, we used chi square and Fisher’s exact tests, at a significance level of 0.05%.

Results: The total infection prevalence in the analyzed feces was of 43.8%. Frequency by Cryptosporidium spp., 8.6%, Toxocara canis 25.2%, Ancylostomatidae 17.6%, and Cystoisospora canis 2.9%. The presence of parasites in the different sampling areas, streets, gardens, and boardwalks was significant with an estimated p of 0.008. Regarding association of species per parasitized animal, the presence is significant for: T. canis-Ancylostomatidae p 0.000 and T. canis-Cryptosporidium spp. p 0.04. The association of Ancylostomatidae-Cryptosporidium spp. was significant for a p of 0.10, since the estimated p is of 0.05.

Conclusion: We confirm the presence of zoonotic enteroparasites Cryptosporidium spp. and geohelminths that infect humans are in stray dogs of San Cristobal de Las Casas. The level of infection with Cryptosporidium spp., T. canis, and Ancylostomatidae is an indicator of the soil contamination and the risk for the population in becoming infected with these zoonotic agents.

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