Abstract
Over a period of 35 days beginning July 23, 1984, the Infection Control Section of the Nassau Hospital, a 535-bed community teaching institution received reports of an unusually high number of PPD tuberculin skin test conversions among employees from Employee Health Service personnel.The first case involved a registered nurse who, upon receiving a routine annual Mantoux skin test on July 23, converted from the previous year's negative reaction to a significant reaction (20 mm induration) with a greater than normal area of erythema. When she reported this to her private medical doctor prior to beginning INH prophylaxis, she was retested by the physician. This test was read as nonreactive.
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