A 2 year old child with a known history of rheumatic heart disease presents with a 3 weeks history of fever with palpitations. Most likely cause is:

Ans. C. Staphylococcal endocarditisHistory of prolonged fever in a child with a previous history of heart disease should always raise suspicion of infective endocarditis. Since Staphylococcus is the most important cause, the best answer here should be Staphylococcal endocarditis