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

Abstract

The objective of this study was to determine the seroprevalence toEhrlichiaspp. 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 againstEhrlichiaspp. A questionnaire was used to obtain information about possible variables associated with seroprevalence. These variables were analyzed through Chi2test and logistic regression. Dog seroprevalence of antibodies againstEhrlichiaspp. was 64% (75/118). Fifty-two percent (61/118) of dogs had tick infestation which was identified asRhipicephalus 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 forEhrlichiaspp. 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 ofEhrlichiaspp. was high in the community of Xcalak and its associated factors were age, tick infestation, and thrombocytopenia.