Most common cause and the most common valve affected in Infective endocarditis in I.V drug abusers
In I.V drug abusers it is staph.aureus to cause Infective endocarditis most commonly and the right sided valves are more commonly affected than the left sided valves
Streptococcus viridans—tricuspid valve
Pseudomonas—mitral valve
Staphylococcus aureus—tricuspid valve
Streptococcus bovis—mitral valve