A 20 year-old white man was admitted with fever and weight loss since
60 days previous to his admission and cardiac failure (functional clas
s IV). The heart was enlarged in the echocardiographic examination wit
hout valvular involvement. Liver biopsy showed granulomatous hepatitis
with a necrosis focus. The patient was treated with a combination of
venous dilators and digital. Serum agglutination test for Brucella sho
wed a titer of 1/250, and complement fixation 1/40. Seven days later,
agglutination titer was 1/4000. He was treated with rifampin and trime
thoprimsulfametoxazol. He got better; fever disappeared, and the signs
of cardiac failure improved. Brucellosic myocarditis is an uncommon c
omplication of brucellosis in the absence of endocarditis. In our know
ledge, this case would be the first reported in Argentina and the thir
d in adult patients out of the five cases reported worldwide.