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Year 2018 - Volume 38, Number 9
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Standardization of a PCR multiplex for the detection of dermatophytes in dogs and cats fur and crusts, 38(9):1824-1828
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ABSTRACT.- Leal C.A.S., Kim P.C.P., Almeida J.C., Melo R.P.B., Santos A.S., Lima D.C.V., Pinheiro Júnior J.W. & Mota R.A. 2018. [Standardization of a PCR multiplex for the detection of dermatophytes in dogs and cats fur and crusts.] Padronização de multiplex PCR para detecção de dermatófitos em pelos e crostas de cães e gatos. Pesquisa Veterinária Brasileira 38(9):1824-1828. Laboratório de Doenças Infecciosas dos Animais Domésticos, Departamento de Medicina Veterinária, Universidade Federal Rural de Pernambuco, Av. Dom Manoel de Medeiros s/n, Dois Irmãos, Recife, PE 52171-900, Brazil. E-mail: c_adrianosl@hotmail.com
The aim of this study was to standardize a multiplex PCR (mPCR) reaction to detect Microsporum canis, Microsporum gypseum and the Trichophyton mentagrophytes complex in dog and cat fur and/or crusts. 250 fur and/or crusts samples from dogs and cats were analyzed by direct examination and culture, DNA from them was extracted for mPCR. Primers were designed and the DNA extracted from colonies of M. canis (URM 6273), M. gypseum (URM 6921) and T. mentagrophytes (URM 6211) from the Collection of Cultures - URM Micoteca - Department of Mycology, Biological Sciences Center of the Federal University of Pernambuco (CCB / UFPE). As negative controls, sterile distilled water and DNA extracted from Alternaria sp., were used to verify the specificity of the primers. Of the total samples analyzed, 15 (6%) were identified in culture as dermatophytes, and of these, 10 were M. canis, three M. gypseum and two T. mentagrophytes (complex). Of these 15 positive samples, 11 (73.3%) were detected by mPCR. Besides these, six others, negative in culture, were identified as M. gypseum. There was good agreement between culture results and mPCR (Kappa: 0.66). The protocol standardized in this study can be used as a screening method, because it has a sensitivity greater than that of the culture, used in parallel to the routine exams, allowing a diagnosis in a shorter time. |
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