Abstract
The article by Horn et al. in this issue of the Journal presents data on some clinical uses of the total eosinophil count confirming some earlier observations. These data establish the count as a useful laboratory test in the diagnosis and management of obstructive pulmonary disease. The following discussion is based on their observations and those of others, including our extensive experience with the total eosinophil count in the Allergy Unit of the Massachusetts General Hospital.The count has a wide range in asthma, often exceeding 1000 per cubic millimeter. The lower values in asthma (350 to 400 per cubic . . .

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