Staphylococcus warneri does not generally cause serious infections in humans. We report a case of endocarditis in a healthy individual with no known past medical history. S. warneri was identified in her blood cultures and echocardiographic evidence confirmed the diagnosis of bacterial endocarditis. There was no apparent cause for her infection, and risk factors such as invasive treatment or medical implant were not present. This rare clinical presentation illustrates the importance of not overlooking low virulence species of Staphylococcus, as they can potentially serve as opportunistic etiological agents for endocarditis, especially among the elderly population.
As a coagulase negative Staphylococcus species, S. caprae is not considered as a clinically-significant member, unlike S. epidermidis. In this report, we describe a case of sepsis resulting from S. caprae infection. This relatively young woman was in generally good health and contracted S. caprae most probably during her treatment of an acute pulmonary embolism. The purpose of this report is to raise awareness of this otherwise innocuous staphylococcal species in clinical settings.
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