一、主要寄生于肺部的寄生虫(一)卡氏肺孢子虫近年来已基本确定本虫为原虫,它引起肺孢子虫性肺炎,典型病变为肺泡间质浆细胞浸润。疾病多发生于婴幼儿、早产儿、营养不良者先天免疫缺陷病,及由于白血病、其它恶性肿瘤和器官移植而大量应用免疫抑制剂或放射治疗的患者。临床表现为突然发作,咳嗽、气促、呼吸困难,紫绀,伴有发热。X 线呈弥漫性条索状及斑点 First, the main parasitic in the lungs parasite (A) Pneumocystis carinii In recent years, the insect has been basically confirmed as protozoa, which causes pneumocystis pneumonia, the typical lesion of alveolar interstitial plasma cells. Diseases occur mostly in infants and young children, premature infants, malnourished patients with congenital immunodeficiency and immunosuppressive agents or radiotherapy due to leukemia, other malignancies and organ transplants. Clinical manifestations of sudden onset, cough, shortness of breath, difficulty breathing, cyanosis, accompanied by fever. X ray was diffuse cord-like and spots