We present a 20-year-old male who was admitted with recurrent fevers.He was diagnosed with Haemophilus parainfluenzae mitral valve endocarditis with severe regurgitation and perforated leaflet.H.parainfluenzae was resistant to Basket Top ceftriaxone but repeated sensitivities showed a sensitive organism.Despite endocarditis caused by H.
parainfluenzae is rare, physicians should be vigilant of Cleaning Fluid such diagnosis.Antibiotics sensitivity may be questioned if shows a resistant organism.