Bloody Diarrhea Is a Common Condition In Dogs, But Studies Evaluating the Enteropathogens Involved

Enteric organisms detected in feces of dogs with bloody diarrhea: 45 cases

Carolina Pantuzza Ramos 1Amanda Nádia Diniz 1Marcio Garcia Ribeiro 2Carolina Lechinski de Paula 2Érica Azevedo Costa 1Luciana Sonne 3Silvia Trindade Pereira 4Carlos Eduardo Bastos Lopes 1Mário Cesar Rennó 5Rodrigo Otávio Silveira Silva 6

  • PMID: 34044173
  • DOI: 10.1016/j.tcam.2021.100549


Bloody diarrhea is a common condition in dogs, but studies evaluating the enteropathogens involved specifically in adult dogs are scarce.

In the present study, stool samples from 45 adult dogs with bloody diarrhea were evaluated for the four enteric organisms mainly reported in these cases: canine parvovirus type 2 (CPV-2), Clostridioides difficile, Clostridium perfringens, and Salmonella spp.

In addition, the samples were also tested for coronavirus, rotavirus, Giardia spp., and Escherichia coli pathotypes to provide a better understanding of possible co-occurrence. Vaccination status, diet, and clinical outcome were also obtained when available. CPV-2b was identified in 17 dogs (37.8%), being the most frequent cause of bloody diarrhea, including completely vaccinated adult dogs. Toxigenic C. difficile and C. perfringens netF+ were detected in six (13.3%) and five (11.1%) dogs, in some cases in co-occurrence with other enteric organisms. Three fatal cases of salmonellosis were identified in dogs fed a raw meat-based diet, raising the risks associated with this increasing practice.

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