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CLEARING HOUSE S FOR FEDERAL SCIENTIFT \") TECHNICAL INFORMAI. Hardcopy Micoroiobe1 p v q E R)/) ,D D"-q • I CT1 41966T _.• THIIC JOUSNAIL OF IMMiUNOiOoy VOl. 98, No. 4 Copy right D 1906 by Tbe Williime & Wilkikje 0i. .'rinld in U.S.A.

A simple, rapid method, based on the Oudin single diffusion technique, is described for the quantitative assay of staphylococcal enterotoxin B. The method yields reproducible results without close control of such assay variables as temperature, antiserum dilution, and assay time, provided that the ionic strength is maintained above 0.2 N sodium chloride equivalent.

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