FALSE-POSITIVE WIDAL REACTION IN HIGH-TITER DISSEMINATED BCG INFECTION

False-positive Widal reactions following certain non-typhoid Salmonell a infections may occur commonly. The case of a patient who developed m iliary tuberculosis secondary to intravesical bacillus Calmette-Guerin (BCG) immunotherapy for bladder carcinoma is described. Very high tit ers of typhoid and paratyphoid agglutinins were obtained with the Wida l test; these titers returned to normal after successful anti-tubercul ous treatment. This case of high-titer, false-positive Salmonella typh i and Salmonella paratyphi A and B reactions to BCG infection occurred in an area non-endemic for typhoid or paratyphoid fever.