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- W2054304826 abstract "A rapid, cost-effective method for the evaluation of lower respiratory specimen has become increasingly important in the diagnosis of pulmonary diseases in immunocompromised patients. In the past, the technically demanding, time-consuming, and expensive Gomori-methenamine-silver (GMS) stain was the principal means for the evaluation of these specimens. In this study, we compared the GMS stain with a new rapid, three-stain protocol for the evaluation of lower respiratory specimens. Lower respiratory specimens were obtained by bronchoalveolar lavage (BAL). Conventional Wright/Giemsa and Gram stains were utilized, as well as a contemporary strain, calcofluor white (CW). A cell count was performed on the BAL specimens, and cytospins were stained by the three stains. The calcofluor white-stained slides were examined with an epi-fluorescent microscope, whereas the other stains were evaluated with a conventional light microscope. Gomori-methenamine-silver (GMS), acid-fast bacillus (AFB), and Papanicolaou (PAP) stains were performed as controls. Thirty-two BAL procedures were performed in 20 (63%) male patients and 12 (37%) female patients. The clinical diagnosis was pneumonia in 31% of the patients, malignant hematologic disease in 28%, acute respiratory distress syndrome (ARDS) in 9%, and acquired immunodeficiency syndrome (AIDS) in 28%. Of these specimens, 78% were adequate for interpretation and 22% were inadequate. Bacteria were found in 50% (16/32) of all BALs, fungi were found in 9% (3/32), and Pneumocystis carinii was found in 9% (3/32). Gram-positive bacteria were most frequently found in patients with pneumonia (80%, 4/5), whereas P. carinii was identified in patients with AIDS. There were no false-positive results. One CW stain was equivocal for P. carinii due to high fluorescent background. Laboratory implementation of the rapid, three-staining technique was accomplished without difficulty in microbiology and hematology laboratory sections. Specimen evaluation with the rapid staining protocol was technically easy to perform; however, experience in ultraviolet fluorescent microscopy was crucial for interpretation of CW stain. All results were available in 2 hr, cost was reduced by 30%, and the assays were available 7 days/week. Further studies are ongoing to substantiate the sensitivity, specificity, and predictive value of this technique, as well as clinical guidelines for its optimal utilization. © 1996 Wiley-Liss, Inc." @default.
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- W2054304826 date "1996-01-01" @default.
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- W2054304826 title "Laboratory implementation of a rapid three-stain technique for detection of microorganisms from lower respiratory specimens" @default.
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- W2054304826 doi "https://doi.org/10.1002/(sici)1098-2825(1996)10:2<104::aid-jcla8>3.0.co;2-c" @default.
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