Case 74. Reference case 74A

　 　 　 　
　
Neonatal pneumonia caused by Haemophilus influenzae infection (HE).
 　
　 　 　 　

　

 　 Exudation of neutrophils, fibrin and red cells is seen in the bronchiolar lumen, while interstitial change with hyaline membrane formation is observed in the surrounding lung tissue. No pathogens are recognizable.