Lewis V J, Engelman H M, Thacker W L
J Clin Microbiol. 1975 Jan;1(1):110-1. doi: 10.1128/jcm.1.1.110-111.1975.
Sheep erythrocytes were treated with glutaraldehyde before sensitization for the indirect hemagglutination test to assay chlamydial antibodies. This treatment markedly increased stability during storage.