MEDizzy - A 2-year-old child presented with fever, irritability, and

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Infectious Diseases IV

A 2-year-old child presented with fever, irritability, and inability to walk; on examination there is erythema, swelling, warmth, and tenderness over the lower thigh; radiographs of the left knee showed focal destruction of the distal femoral metaphysis and periosteal reaction. Of the following, the MOST common etiological pathogen of this condition is

ExplanationStaphylococcus aureus is responsible for more than 80% of acute skeletal infections. Other common causes include Group A streptococcus and Streptococcus pneumoniae. Neisseria meningitidis, Mycobacterium tuberculosis, Bartonella henselae, Actinomyces spp., and anaerobes are less common causes.