Identification of Streptococcus suis in a cat with endomyocarditis

James Wood, Krystle L. Reagan, Catherine Gunther-Harrington, Jane E. Sykes

Research output: Contribution to journalArticlepeer-review


Case summary: A 3-year-old neutered male domestic mediumhair cat was evaluated for a 4-month history of a fever that was responsive to pradofloxacin. A grade III/VI left parasternal systolic heart murmur was noted on examination. Findings on thoracic radiography were consistent with left-sided congestive heart failure and findings on echocardiographic examination suggested endomyocarditis. Aerobic blood cultures yielded growth of a Streptococcus species that was identified as Streptococcus suis using both matrix-associated laser desorption ionization-time of flight mass spectrometry and 16S rRNA gene sequencing. The cat was treated but clinically deteriorated and was euthanized 23 days after diagnosis. Relevance and novel information: To our knowledge, this is the first report of S suis bacteremia, an emerging pathogen, in association with endomyocarditis in the cat. This case also highlights the role of echocardiography to document progressive hemodynamic changes as a result of valvular erosion in the course of infective endocarditis treatment and the role of blood cultures as a diagnostic tool in cats presenting with fever.

Original languageEnglish (US)
JournalJournal of Feline Medicine and Surgery Open Reports
Issue number1
StatePublished - 2021


  • bacterial
  • cardiac infection
  • Endocarditis
  • myocarditis

ASJC Scopus subject areas

  • Small Animals


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