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Bronchoalveolar lavage (BAL) has been performed in 63 patients with acquired immune deficiency syndrome (AIDS) and 20 patients with chronic generalized lymphadenopathy (CGL) for the diagnosis of lung opportunistic infections and analysis of immune effector cells of the lower respiratory tract. In patients with AIDS, Pneumocystis carinii was found in 63%. Cytomegalovirus (CMV) pneumonia was assessed by viral cultures of BAL fluid and microscopic examination: CMV was found in 62% and 39% respectively. Mycobacteria were encountered in 22% of cases. Altogether BAL yielded at least one opportunistic agent in 94% of patients who presented with clinical and/or radiographic pulmonary involvement, and in 80% of patients who presented with fever only. Conversely BAL was negative in all patients with CGL, except one positive CMV culture. Analysis of BAL cells revealed an increased cellularity in AIDS and CGL patients with normal numbers of alveolar macrophages. Alveolar lymphocytes were surprisingly increased in most patients with AIDS (mean 26.1 +/- 21.9%; range 1-76%) and CGL (mean 26.6 +/- 22.6%; range 3-76%) with criteria of activation contrasting with the blood lymphopenia. Evaluation of lung lymphocyte phenotypes revealed a marked decrease in T4 cell percentages, specially in AIDS, whereas the large majority of alveolar lymphocytes expressed the T8 phenotype. We conclude that BAL is a very reliable means for diagnosis of opportunistic lung infections and give interesting prospects to study local immunity in patients with AIDS and CGL.
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January 2012,
International journal of high risk behaviors & addiction,
