Which of the following organisms is the most common causes of acute hematogenous osteomyelitis
a. The causal organism is usually staphylococcus aureus, less often one of the other gram positive cocci such as streptococcus pyogenes or S. pneumoniae.
b. In children under 4 yrs of age the gram negative hemophilus influenzae is the fairly common pathogen. Other gram negative organisms like Escherichia coli, pseudomonas aeruginosa proteus mirabilis and the anaerobic bacteroides fragilis are also occasionally responsible