Neufeld reaction

Neufeld reaction
when pneumococci and other capsulated microorganisms are mixed with specific immune serum there occurs in addition to agglutination a swelling (Ger. quellung) of the capsules of the organisms, owing to the binding of antibody with the capsular polysaccharide; called also capsular swelling and quellung r.

Medical dictionary. 2011.

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Look at other dictionaries:

  • Neufeld reaction (test) — Neu·feld reaction (test) (noiґfelt) [Fred Neufeld, German bacteriologist, 1861–1945] see under reaction …   Medical dictionary

  • reaction — 1. The response of a muscle or other living tissue or organism to a stimulus. 2. The color change effected in litmus and certain other organic pigments by contact with substances such as acids or alkalies; also the property that such substances… …   Medical dictionary

  • Neufeld — Fred, German bacteriologist, 1869–1945. See N. reaction, N. capsular swelling …   Medical dictionary

  • Neufeld test — see under reaction …   Medical dictionary

  • quellung reaction — a reaction in which antibodies against the bacterium Streptococcus pneumoniae combine with the bacterial capsule, which becomes swollen and visible to light microscopy. * * * [Ger. “swelling”] Neufeld r …   Medical dictionary

  • quellung test — Neufeld reaction; see under reaction …   Medical dictionary

  • swelling — 1. An enlargement, e.g., a protuberance or tumor. 2. In embryology, a primordial elevation that develops into a fold, ridge, or prominence. albuminous s. SYN: cloudy s.. ary …   Medical dictionary

  • capsular swelling — the development of a swollen appearance of capsulated pneumococci on exposure to type specific antibody, due to the binding of antibody with capsular polysaccharide; called also Neufeld reaction …   Medical dictionary

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