Microbiology of heart

In most cases, the heart valves are affected, but the disease can also occur on mural endocardium or on the septal defects.The diagnosis of infective endocarditis describes infection of the endocardial surface of the heart and indicates the presence of micro-organisms in the lesion. It is most often associated with infections caused by Streptococcus pneumonia, Streptococcus pyogenes or Staphylococcus aureus.