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      Factors associated with the prevalence of Otodectes cynotis in an ambulatory population of dogs Translated title: Fatores associados à prevalência da infestação por Otodectes cynotis em uma população ambulatorial

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          Abstract

          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.

          Translated abstract

          O objetivo deste estudo foi avaliar os fatores associados à prevalência da infestação por Otodectes cynotis em cães atendidos no Setor de Dermatologia do Hospital Veterinário de Pequenos Animais, Universidade Federal Rural do Rio de Janeiro. Foram atendidos 250 cães, sendo o diagnóstico feito através de visualização do ácaro, presente no cerumem coletado e examinado sob microscopia esterioscópica. Todos os proprietários dos cães foram entrevistados para preenchimento de fichas individuais com dados dos animais e do ambiente em que estes viviam. A infestação por O. cynotis foi observada em 15 animais, sendo a prevalência de 6%. A associação entre as variáveis e a presença dos ácaros foi testada através do χ2 e quando pertinente pelo teste de Fisher exato. Não houve evidências que permitissem concluir que a idade (p = 0,20), o sexo (p = 0,31), a raça (p = 0,50), o formato das orelhas (p = 0,66), o tipo (p = 0,19) e comprimento da pelagem (p = 0,14) e, o convívio com outros animais (p = 0,06) poderiam atuar como possíveis fatores de risco para a infestação. Entretanto, o ambiente em que viviam os animais (p = 0,03) e a freqüência de limpeza (p = 0,005) parecem propiciar a infestação. A ocorrência de prurido esteve associada à presença dos ácaros (p<0,001), sugerindo ser um efeito do parasitismo.

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          Estatística Aplicada a Experimentação Animal

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            Multivariable analysis.

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              Otic cytology in health and disease.

              Accurate characterization of the primary cause and perpetuating factors is essential for successful management of ear disease in dogs and cats. Cytology is a simple, rapid, and practical diagnostic test that should be performed routinely on any and all patients presented for clinical signs consistent with otitis externa. In combination with clinical signs, otoscopic evaluation, and diagnostic testing of primary disease, serial cytology enhances the ability of veterinarians to diagnose secondary infections, monitor progression of disease, evaluate response to therapy, and make appropriate management decisions. Cytologic specimens should be evaluated for the presence, numbers, and characteristics of three key features: yeast, bacteria, and leukocytes. More than five yeast organisms or more than 25 bacteria per high-powered field is suggestive of significant microbial activity warranting therapeutic intervention. The presence of leukocytes, particularly with phagocytized bacteria, indicates "true infection" rather than overgrowth; if suppurative discharge is present, systemic therapy is needed. Cytology combined with culture and susceptibility is the best method for identification of bacterial overgrowth and infection; however, if only one test can be performed, always choose cytology. Culture results assist in the selection of appropriate antibiotic therapy, but cytology determines whether systemic antibiotics are indicated, which organisms are most significant, and when therapy can be discontinued.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                pvb
                Pesquisa Veterinária Brasileira
                Pesq. Vet. Bras.
                Colégio Brasileiro de Patologia Animal - CBPA (Rio de Janeiro )
                1678-5150
                August 2008
                : 28
                : 8
                : 375-378
                Affiliations
                [1 ] Universidade Federal Rural do Rio de Janeiro Brazil
                [2 ] Universidade Federal Rural do Rio de Janeiro Brazil
                Article
                S0100-736X2008000800005
                10.1590/S0100-736X2008000800005
                9f353135-a6a1-4220-a904-27f910d74ae7

                http://creativecommons.org/licenses/by/4.0/

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                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=0100-736X&lng=en
                Categories
                VETERINARY SCIENCES

                General veterinary medicine
                Ear mange,risk factors,dogs,Sarna otodécica,fatores de risco,cães
                General veterinary medicine
                Ear mange, risk factors, dogs, Sarna otodécica, fatores de risco, cães

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