Abstract
Endocarditis is a rare disease in children and is associated with high morbidity and mortality. It must be considered for every child with long-term fever without source, especially if there is a risk factor. Among the germs that can be involved, Streptococcus pneumoniae is extremely rare. Streptococcal invasive infections are decreasing since the introduction of vaccination, but all serotypes are not covered.
In this case, we describe a 10-year-old girl affected by Marfan syndrome with pre-existing mitral regurgitation. She was diagnosed with a streptococcal endocarditis. The laboratory identified the strain as Streptococcus pneumoniae serotype 13, a non-vaccinal serotype.