Quality control testing of anti-sera with glutaraldehyde-treated antigens

Glutaraldehyde-treated bacterial cells were used as the quality control organisms in agglutination and fluorescent antibody tests for group A Streptococcus; Salmonella groups A, B, and D; Shigella groups B, C, and D; and Neisseria gonorrhoeae. The antigen preparations were serologically reactive over a period of five months.