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Infective endocarditis is an infection of the inner surface of the heart (endocardium), usually the valves. [1] Signs and symptoms may include fever, small areas of bleeding into the skin, heart murmur, feeling tired, and low red blood cell count.
The bacteria most commonly involved are streptococci or staphylococci. [3] The diagnosis of infective endocarditis relies on the Duke criteria, which were originally described in 1994 and modified in 2000. Clinical features and microbiological examinations are the first steps to diagnose an infective endocarditis. The imaging is also crucial.
Subacute bacterial endocarditis, abbreviated SBE, is a type of endocarditis (more specifically, infective endocarditis). [5] Subacute bacterial endocarditis can be considered a form of type III hypersensitivity .
The HACEK organisms are a group of fastidious Gram-negative bacteria that are an unusual cause of infective endocarditis, which is an inflammation of the heart due to bacterial infection. [1] HACEK is an abbreviation of the initials of the genera of this group of bacteria: Haemophilus , Aggregatibacter (previously Actinobacillus ...
The nodes are commonly indicative of subacute bacterial endocarditis. [3] 10–25% of endocarditis patients will have Osler's nodes. [4] Other signs of endocarditis include Roth's spots and Janeway lesions. The latter, which also occur on the palms and soles, can be differentiated from Osler's nodes because they are non-tender. [2]
The bacteria initially causes a disease called Q fever, but months or sometimes years after the initial Q fever, they can develop endocarditis, but usually this is in high-risk people, like those that are immunocompromised, pregnant women, and those with pre-existing heart valve defect, which makes it tricky to diagnose unless there’s a ...
Fastidious Gram-negative bacteria such as Cardiobacterium hominis along with Eikenella corrodens and Kingella kingae mainly inhabiting in the oral and upper respiratory tract in humans are responsible for 1–3% of infective endocarditis. [18] Treatment of the disease involves third-generation cephalosporin with more than 80-90% success rate. [18]
S. sanguinis may gain entrance to the bloodstream when opportunity presents (dental cleanings and surgeries) and colonize the heart valves, particularly the mitral and aortic valves, where it is the most common cause of subacute bacterial endocarditis. For this reason, oral surgeons often prescribe a short course of antibiotics to be taken a ...