Retrospective Analysis of Aetiological Agents Associated with Pulmonary Mycosis Secondary to Enteric Salmonellosis in Six Horses by Panfungal Polymerase Chain Reaction
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abstract
Pulmonary mycosis secondary to enterocolitis is an uncommon diagnosis in equine medicine, but is thought to result from mucosal compromise and translocation of enteric fungi. The aetiological agent associated with translocation is often identified based on fungal culture or hyphal features in histological sections. In order to understand better the aetiological agents involved, six horses diagnosed with Salmonella enteritis and concurrent pulmonary mycosis were identified retrospectively through a database search of veterinary teaching hospital records. Samples from these cases were subjected to polymerase chain reaction and sequencing of the internal transcribed spacer 2 (ITS-2) located between the 5.8S and 28S rRNA genes to identify the aetiological agent involved. Sequencing identified Aspergillus fumigatus, Aspergillus flavus, Fusarium spp., Cladosporium spp. and Curvularia spp. A single case had a dual infection with Fusarium spp. and A. fumigatus.
