Identification of Neisseria animaloris infection as the etiology of cardiac tamponade in a cat: a case report

Abstract Background Cardiac tamponade is a serious problem in companion animals. A diagnosis of COVID-19 too late can lead to death. Neisseria spp. are considered commensal microorganisms of the oral cavity in dogs and cats and are usually isolated from human wounds resulting from bites on these animals. Case presentation This article presents a clinical case of a cat with hydropericardium, the cause of which was Neisseria animaloris. Identification of the pathogen in the pericardial sac fluid was performed using the MALDI-TOF method. Conclusion This is the first report on a documented case of cardiac tamponade in a cat triggered by Neisseria animaloris bacterial infection in feline medicine, emphasizing its novelty.