Systemic acanthamoebiasis associated with canine distemper in dogs in the semiarid region of Paraíba, Brazil

Maria T S Frade, Luiza F. de Melo, Clarice R M Pessoa, Jeann L. de Araújo, Rafael A. Fighera, Almir P. Souza, Francisco A Uzal, Antonio F M Dantas

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


Infections by free-living amoebae can cause systemic disease in animals and humans. We describe the epidemiological, clinical and pathological aspects of disseminated acanthamoebiasis associated with canine distemper in three dogs of the semiarid region of Paraíba, Northeastern Brazil. Affected dogs developed progressive neurological and respiratory signs that progressed to death within in two to 20 days. Gross lesions were irregular and with yellow- -reddish nodules randomly distributed in the lungs, heart, kidneys, spleen, lymph nodes, adrenals, and intestine. One dog had foci of malacia in the parietal cortex and another one in nucleus of brain basis. Histologically, pyogranulomas with areas of necrosis and hemorrhage in all organs affected were observed, associated with myriads of intralesional amoebic trophozoites. All three cases were concomitant canine distemper, that possibly triggered immunosuppression in the dogs. The diagnosis was performed through microscopic findings of infection by free-living amoebae and confirmed Acanthamoeba sp. by immunohistochemistry.

Original languageEnglish (US)
Pages (from-to)160-164
Number of pages5
JournalPesquisa Veterinaria Brasileira
Issue number2
StatePublished - 2015


  • Acanthamoeba sp.
  • Amebiasis
  • Canine distemper
  • Diseases of dogs
  • Opportunistic diseases

ASJC Scopus subject areas

  • veterinary(all)


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