Diagnosis
Diagnosis of subacute bacterial endocarditis can be done by collecting three blood culture specimens over a 24-hour period for analysis, also it can usually be indicated by the existence of:

Oslers nodes
Roths spots
Nail clubbing

Treatment
The standard treatment is with a minimum of four weeks of high-dose intravenous penicillin with an aminoglycoside such as gentamicin. The use of high-dose antibiotics is largely based upon animal models.Leo Loewe of Brooklyn Jewish Hospital was the first to successfully treat subacute bacterial endocarditis with penicillin. Loewe reported at the time seven cases of subacute bacterial endocarditis in 1944. See also
Endocarditis

References
Further references
Goolsby, Mary Jo; Grubbs, Laurie (2011-04-28). Advanced Assessment: Interpreting Findings and Formulating Differential Diagnoses. F.A. Davis. ISBN 9780803625174. Silverman, Sol; Eversole, Lewis R.; Truelove, Edmond L. (2002-01-01). Essentials of Oral Medicine. PMPH-USA. ISBN 9781550091465. Kiefer, TL; Bashore, TM (2012). "Infective endocarditis: a comprehensive overview". Reviews in Cardiovascular Medicine. 13 (2–3): e105–20. PMID 23160159. == External links ==
It can take up to six months to obtain the result. Xenodiagnosis involves feeding the blood to triatomine insects, then examining their feces for the parasite 30 to 60 days later. These methods are not routinely used, as they are slow and have low sensitivity. Prevention
Efforts to prevent Chagas disease have largely focused on vector control to limit exposure to triatomine bugs. Insecticide-spraying programs have been the mainstay of vector control, consisting of spraying homes and the surrounding areas with residual insecticides. This was originally done with organochlorine, organophosphate, and carbamate insecticides, which were supplanted in the 1980s with pyrethroids. These programs have drastically reduced transmission in Brazil and Chile, and eliminated major vectors from certain regions: Triatoma infestans from Brazil, Chile, Uruguay, and parts of Peru and Paraguay, as well as Rhodnius prolixus from Central America. Vector control in some regions has been hindered by the development of insecticide resistance among triatomine bugs. In response, vector control programs have implemented alternative insecticides (e.g. fenitrothion and bendiocarb in Argentina and Bolivia), treatment of domesticated animals (which are also fed on by triatomine bugs) with pesticides, pesticide-impregnated paints, and other experimental approaches. In areas with triatomine bugs, transmission of T. cruzi can be prevented by sleeping under bed nets and by housing improvements that prevent triatomine bugs from colonizing houses.Blood transfusion was formerly the second-most common mode of transmission for Chagas disease.