[Community-acquired, methicillin-resistant Staphylococcus aureus acute osteomyelitis and pneumonia]. / Osteomielitis aguda y neumonía comunitaria por Staphylococcus aureus resistente a meticilina.

The appearance of a community-acquired methicillin-resistant Staphylococcus aureus (CA-MRSA) is a increasingly important problem. We describe the case of a child suffering a CA-MRSA osteomyelitis complicated with a non-necrotizing pneumonia. The fast resolution of the pulmonary infection contrasts with the poor evolution of the septic bone. We emphasise the importance of correct surgical drainage to clear the infection. We review the literature on this emergent pathogen.

[Nonvaccine Streptococcus pneumoniae serotypes causing acute bacterial meningitis]. / Streptococcus pneumoniae serotipo no vacunal como agente causal de meningitis bacteriana aguda.

The pneumococcal heptavalent conjugate vaccine protects children aged less than 2 years old from invasive pneumococcal disease (IPD). Efficacy is 89-93% in the US population and 71-86% in European studies. The vaccine confers active immunization against the main serotypes causing IPD (4, 6B, 9V, 14, 18C, 19F y 23F). We describe 2 children who presented with pneumococcal meningitis caused by nonvaccine serotypes. As a result of the widespread use of the heptavalent vaccine, there may be a shift in the serotypes causing IPD.