IGHE and tuberculosis: Patients who had coughed for more than three weeks at TB diagnosis had significantly higher median total serum IgE titers (n = 49, median = 493 IU/ml, IQR = 172 to 1200) than those who had coughed for less than three weeks at TB diagnosis (n = 27, median = 207 IU/ml, IQR = 48 to 489) (P = 0.02).