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RAPID IDENTIFICATION OF GROUP A, B, C AND G BETA‐HAEMOLYTIC STREPTOCOCCI BY A MODIFICATION OF THE CO‐AGGLUTINATION TECHNIQUE. COMPARISON OF RESULTS OBTAINED BY CO‐AGGLUTINATION, FLUORESCENT ANTIBODY TEST, COUNTERIMMUNOELECTROPHORESIS, AND PRECIPITIN TECHNIQUE
Author(s) -
ARVILOMMI HEIKKI,
UURASMAA OUTI,
NURKKALA ANNIKKI
Publication year - 1978
Publication title -
acta pathologica microbiologica scandinavica section b microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.909
H-Index - 88
eISSN - 1600-0463
pISSN - 0304-131X
DOI - 10.1111/j.1699-0463.1978.tb00017.x
Subject(s) - counterimmunoelectrophoresis , latex fixation test , serology , microbiology and biotechnology , agglutination (biology) , group a , antibody , haemolysis , direct agglutination test , group b , biology , medicine , immunology
A rapid modification of the co‐agglutination (COA) technique for grouping A, B, C and G beta‐haemolytic streptococci was developed. The results are obtained within three hours after inoculation from primary plates of 0.5 ml broth. This method was compared to the fluorescent antibody test (FA) and counterimmunoelectrophoresis (CIE), two other rapid methods available for serological grouping of streptococci. Of 71 recently isolated streptococcal strains from clinical sources, 70 were correctly grouped in COA, 63 in FA and 68 in CIE. With commercial reagents COA compared favourably in accuracy to the other methods and can be recommended for routine serological grouping of beta‐haemolytic streptococci in the clinical laboratory.