<prompt> Acute haematogenous osteomyelitis is commonly caused byStaph, aureusStrepto. pneumoniaeE. coliPneumococcus  <response>: A. i.e. Staph, aureus 197 - Ananthanaryan 7th Acute haematogenous osteomyelitis - causal organism is usually Staph, aureus, less often one of the other Gram positive cocci such as Streptococcus. Pyogenes or S. pneumoniae Organism usually settles in the metaphysis most often in the proximal tibia or in the distal and proximal ends of the femur1. Staphylococcal toxic syndrome is due to Enterotoxin B C2. Pantone Valentine leucocitin is seen in - Staphylococci3. The antibody marker in serum for Staph.endocarditis is - Antiteichoic acid 