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J Clin Microbiol. 1982 June; 15(6): 1074-1076
ABSTRACT
A culture of Escherichia coli possessing colonization factor antigen I was subjected to isopycnic separation on Percoll gradients. The results demonstrated successful division of the culture into two populations: (i) bacteria which cause mannose-resistant hemagglutination and (ii) bacteria which lack the ability to hemagglutinate in the presence of mannose.
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