Abstract

In this report, a case of infective endocarditis due to Brucella canis treated with antibiotics successfully in a 33-year-old man, having a history of rheumatic heart disease and raising animals, admitted with complaints of fever with chills, generalized myalgias, sweating and weakness was presented. Standard tube agglutination (STA) test was negative despite further dilutions to exclude prozone phenomenon. STA test repeated remained negative. Blood culture yielded Brucella spp. B. canis microagglutination test was detected to be positive in 1/160 dilution. A vegetation with dimensions of 0.5×0.7 cm detected on aortic valve echocardiographically became smaller after one month of doxycycline, rifampin, and streptomycin treatment, and was undetectable in second month. Repeat echocardiographic examination in the third month revealed no vegetation again, and treatment continued with doxycycline, rifampin and trimethoprim-sulfamethoxazole during outpatient period, and total duration of treatment was planned to be at least one year.