左肺上叶全部实变的大叶性肺炎。这种类型的肺炎比支气管肺炎少多了。部分原因是,绝大多数大叶性肺炎由链球菌(肺炎球菌)引起，并且数十年来，青霉素治疗对其比较有效，因此复杂、严重的病例不常见。然而,象大多数其它细菌一样，肺炎球菌逐渐对抗菌素产生耐药。严重肺炎球菌性肺炎仍然发生,甚至在青年到中年人中(并非小儿和老年人)发生，死亡率为20%。
This is a lobar pneumonia in which consolidation of the entire left upper lobe has occurred. This pattern is much less common than the bronchopneumonia pattern. In part, this is due to the fact that most lobar pneumonias are due to Streptococcus pneumoniae (pneumococcus) and for decades, these have responded well to penicillin therapy so that advanced, severe cases are not seen as frequently. However, pneumoccoci, like most other bacteria, are developing more resistance to antibiotics. Severe pneumococcal pneumonia still occurs, even in young to middle aged persons (not just the very young and the very old) and has a mortality rate of 20%!
