quel·lung re·ac·tion

1. Synonym(s): Neufeld capsular swelling

2. if pneumococcal organisms, India ink, and specific antisera are mixed, the antibodies present in the sera will bind to the polysaccharide antigens of the pneumococcal capsule and the capsule will appear more opaque and swollen. This test will identify the organism as being pneumococcal as well as the specific capsular types. Synonym(s): capsular precipitation reaction

[Ger. Quellung, swelling]

Farlex Partner Medical Dictionary © Farlex 2012

quel·lung re·ac·tion

(kvel'lung rē-ak'shŭn)

1. Synonym(s): Neufeld capsular swelling.

2. If pneumococcal organisms, India ink, and specific antisera are mixed, the antibodies present in the sera will bind to the polysaccharide antigens of the pneumococcal capsule and the capsule will appear more opaque and swollen.

[Ger. Quellung, swelling]

Medical Dictionary for the Health Professions and Nursing © Farlex 2012

Neufeld,

Ferdinand, German bacteriologist, 1869-1945.

Neufeld capsular swelling - increase in opacity and visibility of the capsule of capsulated organisms exposed to specific agglutinating anticapsular antibodies. Synonym(s): Neufeld quellung reaction; Neufeld reaction; quellung phenomenon; quellung reaction; quellung test

Neufeld quelling reaction - Synonym(s): Neufeld capsular swelling

Neufeld reaction - Synonym(s): Neufeld capsular swelling

Medical Eponyms © Farlex 2012

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References in periodicals archive

However, 10 strains were not distinguished by the standard method (quellung reaction) because they reacted with both factors, 6b and 6c.

Prevalence and genetic structures of streptococcus pneumoniae serotype 6D, South Korea

Serotypes were determined by Quellung reaction or PCR testing or predicted based on complete multilocus sequence typing, as described in the text.

Pediatric parapneumonic empyema, Spain

Pneumococcal serotypes were determined at the Centers for Disease Control and Prevention by the latex agglutination test and confirmed with Quellung reaction. The presence of mef and/or ermB was determined by using a duplex polymerase chain reaction (PCR) (7), and mefA was differentiated from mefE by PCR-restriction fragment length polymorphisms (8).

Erythromycin-nonsusceptible Streptococcus pneumoniae in children, 1999-2001

All isolates were serotyped by the quellung reaction (6) with sera of various levels of reactivity from the Statens Seruminstitut (Copenhagen, Denmark).

Fluoroquinolone and other antimicrobial resistance in invasive pneumococci, Hong Kong, 1995-2001

Serotyping was performed by the Quellung reaction (Quellung antisera, Staten Seruminstitut, Copenhagen).

Fluoroquinolone and macrolide treatment failure in pneumococcal pneumonia and selection of multidrug-resistant isolates

Pneumococcal serogrouping was performed with the Quellung reaction with a standard technique (5) and a diagnostic kit from Statens Serum Institut (SSI), Copenhagen, Denmark.

Poor potential coverage for 7-valent pneumococcal conjugate vaccine, Malawi. (Dispatches)