Quellung reaction

Swelling of the capsule surrounding a bacterium after it is exposed to specific antibodies or antisera; the reaction forms the basis of some tests to identify microorganisms.


A reaction in which antibodies against the bacterium Streptococcus pneumoniae combine with the bacterial capsule, which becomes swollen and visible to light microscopy.


The swelling of capsules of bacteria when they are mixed with their specific immune serum.


 


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