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Journal of Tropical Medicine
Volume 2016 (2016), Article ID 4109467, 6 pages
Research Article

Associated Factors to Seroprevalence of Ehrlichia spp. in Dogs of Quintana Roo, Mexico

1Laboratorio de Parasitología, Centro de Investigaciones Regionales “Dr. Hideyo Noguchi” Unidad Inalámbrica, Universidad Autónoma de Yucatán, Calle 96 S/N Cruzamientos Av. Jacinto Canek y Calle 47, 97225 Merida, YUC, Mexico
2Departamento de Salud Animal y Medicina Preventiva, Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Yucatán, Km. 15.5 Carr. Mérida-Xmatkuil, AP 4-116 Itzimná, Mérida, YUC, Mexico
3Unidad de Investigación Clínica y Epidemiología, Facultad de Medicina, Universidad Autónoma de Yucatán, Av. Itzáes No. 498, 97000 Mérida, YUC, Mexico

Received 19 August 2016; Revised 31 October 2016; Accepted 13 November 2016

Academic Editor: Carlos E. P. Corbett

Copyright © 2016 Pedro Pablo Martínez-Vega et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The objective of this study was to determine the seroprevalence to Ehrlichia spp. in dogs from Xcalak, Quintana Roo, Mexico, and the associated factors. Serum samples were obtained from 118 dogs and used in an indirect immunofluorescent assay test for the detection of antibodies against Ehrlichia spp. A questionnaire was used to obtain information about possible variables associated with seroprevalence. These variables were analyzed through Chi2 test and logistic regression. Dog seroprevalence of antibodies against Ehrlichia spp. was 64% (75/118). Fifty-two percent (61/118) of dogs had tick infestation which was identified as Rhipicephalus sanguineus sensu lato. Anemia was observed in 36% of dogs. Leucopenia (2.5%), thrombocytopenia (70%), and hemorrhage (14%) were also observed. Thirty-one percent (23/75) of dogs with anemia, 4% (3/75) of dogs with leucopenia, 80% (60/75) of dogs with thrombocytopenia, 17% (13/75) of dogs with hemorrhages, and 59% (44/75) of dogs with ticks were positive for Ehrlichia spp. antibodies. The factors associated with seroprevalence were age (1–3 and >3 years old, OR = 7.77 and OR = 15.39, resp.), tick infestation (OR = 3.13), and thrombocytopenia (OR = 3.36). In conclusion, seroprevalence of Ehrlichia spp. was high in the community of Xcalak and its associated factors were age, tick infestation, and thrombocytopenia.