[Antibodies to erythrogenic toxin B in scarlatina patients]

Coupled sera of 240 children suffering from scarlet fever obtained on the 1st-5th and 12th-15th days of the disease were examined in the PHA test with the A and B toxins. Antibodies to toxin B were revealed in 63-69% and to toxin A in 60-66% of the sera. In 64.5% of the cases the sera under study reacted simultaneously with both types of the toxin; antibodies to toxin B were contained in higher titres than to toxin A in 1/3 of the sera. The highest antibody titres to toxin B were revealed during summer.