Sudden infant death attributed to peracute pulmonary infection: Two autopsy cases

This report describes two autopsy cases of sudden infant death attributed to peracute pulmonary infection in which possible causative microorganisms could be identified despite only minor pathological findings. Both babies were 5-month-old boys, who had no symptomatic disorders and were found dead in bed. Their main macropathology was inflated heavy lungs with patchy bleedings. One case showed a pulmonary histopathological finding suggestive of viral infection, and adenovirus DNA was detected from the intrabronchial fluid. In the second case, pulmonary histopathology was a feature of early inflammatory reaction involving focal necrosis with some neutrophil infiltration and many intra-alveolar macrophages containing gram-positive cocci, and Staphylococcus aureus was identified in venous blood culture. These findings significantly support the presence of pathogenic microorganisms in sudden infant death.