T cells as marked with acid alpha-naphthyl acetate esterase staining in secretory otitis media.

Non-specific acid alpha-naphthyl acetate esterase (ANAE) activity of the lymphocytes was investigated in smears made of middle ear secretions and peripheral blood from 61 children with secretory otitis media. On the average, 20.1% (right ear) and 2.1% (left ear) of the lymphocytes in the ear samples showed distinctive ANAE-positive spots in their cytoplasms, by the method used. The mean percentage of ANAE-positive cells in the blood was 47.8 and it was significantly (P less than 0.001) higher than the respective percentages of the ear samples. In normal childrne, 54.9% of the lymphocytes, on the average, were ANAE-positive. This difference in blood between patients and control group was significant (P less than 0.001). Consequently, the present study suggests that the relationship of T- and non-T-lymphocytes, as a marked with ANAE, are disturbed in children suffering from secretory otitis media. The importance of this finding and the validity of the method are discussed.