Staphylococcal scalded-skin syndrome: development of a primary binding assay for human antibody to the exfoliative toxin.

AUTOR(ES)

Wiley, B B

RESUMO

Exfoliative toxin (ET) from a phage group II Staphylococcus aureus strain causing staphylococcal scalded-skin syndrome was purified by electrofocusing. Ampholytes and salts were removed from the final product by column chromatography on G-50 Sephadex. Sodium dodecyl sulfate-polyacrylamide gels of the final product yielded a single band upon gel electrophoresis, even when 60 mug of protein was placed in the gels. Radiolabeling of the purified toxin with 125I yielded a product that still caused exfoliation of suckling mice, indicating that the toxin was still biologically active. A radioimmunobinding assay was developed and used to test rabbit and human sera for antibodies to exfoliative toxin. Although the maximum percentage of binding was not as high as expected (approximately 40%), it was postulated that either iodination had not been sufficiently vigorous or the toxin had sustained immunological damage. The assay was reproducible and more sensitive than the existing neutralization method and readily applicable to the testing of human sera for exfoliative toxin antibodies.

Documentos Relacionados

• Development and Evaluation of Detection Systems for Staphylococcal Exfoliative Toxin A Responsible for Scalded-Skin Syndrome
• Clinical, Microbial, and Biochemical Aspects of the Exfoliative Toxins Causing Staphylococcal Scalded-Skin Syndrome
• Product of Staphylococcus aureus Responsible for the Scalded-Skin Syndrome
• Staphylococcal Scalded-Skin Syndrome Complicating Wound Infection in a Preterm Infant with Postoperative Chylothorax
• Staphylococcal Scalded Skin Syndrome: Potentiation by Immunosuppression in Mice; Toxin-Mediated Exfoliation in a Healthy Adult