Factors associated with the prevalence of Otodectes cynotis in an ambulatory population of dogs

Clarissa P. Souza, Regina R. Ramadinha, Fabio B. Scott, Maria Júlia S. Pereira

Research output: Contribution to journalArticlepeer-review


The objective was to evaluate the factors associated with the prevalence of Otodectes cynotis infestations in dogs assisted at the Dermatology Service of the Veterinary Hospital, Universidade Federal Rural do Rio de Janeiro. A total of 250 dogs were examined through direct smear of ear samples using a stereoscopic microscope, for the parasitological diagnostic. All dog owners were interviewed and data regarding the animals and their environments were individually recorded. Mite infestation was observed in 15 animals, with a prevalence of 6%. The variables were tested regarding their association with the mites, using the χ2 test and, when appropriate, the Fisher exact test. There were no evidences that age (p = 0,20), sex (p = 0,31), breed (p = 0,50), shape of ear (p = 0,66), type (p = 0,19) and length of hair (p = 0,14) and contact with other animals (p = 0,06) could act as potential risk factors for O. cynotis infestation. However, living environment (p = 0,03) and frequency of environmental cleaning (p = 0,005) may facilitate the infestation. The occurrence of pruritus was associated to the presence of mites (p<0,001), suggesting to be an effect of the parasitism.

Original languageEnglish (US)
Pages (from-to)375-378
Number of pages4
JournalPesquisa Veterinaria Brasileira
Issue number8
StatePublished - Aug 2008
Externally publishedYes


  • Dogs
  • Ear mange
  • Risk factors

ASJC Scopus subject areas

  • General Veterinary


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