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[Levels of serum lactate dehydrogenase and its isozymes with relation to clinical features of pneumocystis carinii pneumonia in acquired immunodeficiency syndrome patients].

The clinical courses of 9 patients with acquired immunodeficiency syndrome (AIDS) complicated by pneumocystis carinii pneumonia (PCP) were followed to investigate the clinical significance of the measurement of various parameters such as serum lactate dehydrogenase (LDH). The mean duration of symptoms before diagnosis was 20 days, and the median duration of therapy was 29.5 days. Serum LDH activity increased in 8 of 9 cases. The isozyme pattern in all cases was characterized by high LDH3 values from the early stage. However, inflammatory markers did not increase in most cases. There were good correlations between the levels of LDH, clinical course, and PaO2.