随着医学科学的发展,肺部感染性疾患的研究不断深入,治疗也取得一定进展。(一)病原菌的变迁与机会感染1.病原菌的变迁近年来,由于广谱抗生素的广泛应用所致的正常菌群紊乱,以及继发性免疫缺陷引起的易感性宿主的增多,实际上呼吸系感染病原菌已发生了明显变化。据日本学者报道:(1)采用抗生素 With the development of medical science, the research on infectious lung diseases continues to deepen, and treatment has made some progress. (A) changes in pathogens and opportunistic infections 1. Pathogens in recent years, due to the widespread use of broad-spectrum antibiotics caused by the normal flora disorders, and secondary immunodeficiency caused by susceptible host increased, in fact, the respiratory system Pathogens have changed significantly. According to Japanese scholars reported: (1) the use of antibiotics