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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 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 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.
Other species are K. indologenes, K. denitrificans (both causing endocarditis) and K. oralis found in dental plaque. One notable exception is in cases of endocarditis (heart valve infection), which can be more refractory to treatment. K. kingae is the fifth member of the HACEK group of fastidious Gram-negative bacteria that cause endocarditis ...
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 nodes are commonly indicative of subacute bacterial endocarditis. [4] 10–25% of endocarditis patients will have Osler's nodes. [5] 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. [3]
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 ...
Beta-lactam agents such as amoxicillin and ampicillin are antibiotics that are effective against H. parainfluenzae. The Duration of Antibiotic Therapy depends on the severity of the infection. In 40% of infective endocarditis cases caused by H. parainfluenzae, the best treatment is a valve replacement. [4]