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J Clin Microbiol. 1986 February; 23(2): 339-342

Enzyme-linked immunosorbent assay for detection of Staphylococcus epidermidis antibody in experimental S. epidermidis endocarditis.

ABSTRACT

The immune response against Staphylococcus epidermidis, as determined by an enzyme-linked immunosorbent assay, was evaluated in experimental S. epidermidis infections in rabbits. Antigens from 8 of 10 clinical S. epidermidis strains detected significant antibody production in five rabbits immunized with different strains of S. epidermidis and in five of six rabbits with experimental endocarditis caused by four different strains. The antigens from two strains detected antibody production in all rabbits, and strain ATCC 14990 discriminated best between positive and negative samples. Consecutive blood samples from rabbits with endocarditis and control rabbits with bacteremia, which were successfully prevented from developing endocarditis by using prophylactic antibiotics, were examined by using an enzyme-linked immunosorbent assay and an ultrasonic extract of strain ATCC 14990 as the antigen. This assay discriminated between rabbits with endocarditis and rabbits with uncomplicated bacteremia. Antibody production was detected as early as 3 days after the onset of infection in rabbits with endocarditis.