Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5732934 | International Journal of Surgery Case Reports | 2017 | 4 Pages |
â¢Case of infective endocarditis caused by a rare pathogen, Aggregatibacter aphrophilus is presented.â¢Aggregatibacter aphrophilus can't be detected by common culture methods.â¢Br-PCR testing is a useful tool to identify pathogens of culture negative endocarditis.â¢Serum PR3-ANCA can be positive in Aggregatibacter aphrophilus endocarditis.
IntroductionAggregatibacter aphrophilus is a rare cause of infective endocarditis. This pathogen is difficult to identify with common culture methods, which can lead to incorrect diagnosis and treatment.Presentation of caseA 72-year-old woman was admitted to a community hospital with a persistent high fever and deteriorating renal function. Based on negative blood culture and positive serum proteinase 3 anti-neutrophil cytoplasmic antibody (PR3-ANCA), acute renal failure associated with ANCA-rerated vasculitis was initially suspected. However, the patient developed heart failure soon afterward; echocardiography showed mitral insufficiency with mobile vegetation attached to the mitral valve, indicating infective endocarditis. After transfer to our hospital, the patient underwent mitral valve repair. Broad-range polymerase chain reaction (br-PCR) and sequencing identified Aggregatibacter aphrophilus in the excised vegetation. The patient had a good postoperative course, with recovery of renal function.ConclusionA rare disease, Aggregatibacter aphrophilus infective endocarditis was successfully treated with surgical repair and appropriate antibiotic therapy. To avoid misdiagnosis, br-PCR testing should be performed in patients with blood culture-negative endocarditis.