Appl Environ Microbiol. 1970 February; 19(2): 398-399
Copyright © 1970 American Society for Microbiology. All Rights Reserved.
Division of Laboratories, Pennsylvania Department of Health, 2100 West Girard Avenue, Philadelphia, Pennsylvania 19130
ABSTRACT
Modification of the pH of kaolin-serum treatment produces hemagglutination-inhibition test results comparable with the plaque neutralization test in duck embryo tissue culture; the standard treatment does not.
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