Biomaterial Database

Fluorescent antibody technic used for identification and typing of Streptococcus pneumoniae. 1982

K Wicher, and C Kalinka, and P Mlodozeniec, and N R Rose

A fluorescent antibody technic (FAT) has been developed for identification and typing of Streptococcus pneumoniae. The technic was first compared with the Neufeld test (NT) using polyvalent antiserum and isolates identified as S. pneumoniae. Of 197 isolates, 191 (97%) were positive by both technic, and six strains (3%) were negative by both methods. Both tests were also used for determination of pneumococcal types agreed in 23 of 25 tests (92%) but the Neufeld test gave false results in 2 of 25 determinations (8%). The polyvalent antiserum was used to examine by FAT direct films obtained from various specimens and the results were compared with Gram stain and cultures. Of 198 direct films in which gram-positive cocci resembling pneumococci were found, 154 were positive by FAT and 130 were positive by culture. FAT appears to be more reliable than Gram stain or culture. During a four-year period, isolated strains of pneumococci were typed by FAT and the results compared. A slight change in the incidence of the pneumococcal types was observed. Although the Neufeld test is simpler, FAT is easier to read and is a more reliable method if identifying pneumococci, especially in body fluids where the number of microorganisms might be limited. Also, FAT is a more reliable procedure in typing strains.

UI	MeSH Term	Description	Entries
D008751	Methylene Blue	A compound consisting of dark green crystals or crystalline powder, having a bronze-like luster. Solutions in water or alcohol have a deep blue color. Methylene blue is used as a bacteriologic stain and as an indicator. It inhibits GUANYLATE CYCLASE, and has been used to treat cyanide poisoning and to lower levels of METHEMOGLOBIN.	Methylthionine Chloride,Swiss Blue,Basic Blue 9,Chromosmon,Methylene Blue N,Methylthioninium Chloride,Urolene Blue,Blue 9, Basic,Blue N, Methylene,Blue, Methylene,Blue, Swiss,Blue, Urolene
D005455	Fluorescent Antibody Technique	Test for tissue antigen using either a direct method, by conjugation of antibody with fluorescent dye (FLUORESCENT ANTIBODY TECHNIQUE, DIRECT) or an indirect method, by formation of antigen-antibody complex which is then labeled with fluorescein-conjugated anti-immunoglobulin antibody (FLUORESCENT ANTIBODY TECHNIQUE, INDIRECT). The tissue is then examined by fluorescence microscopy.	Antinuclear Antibody Test, Fluorescent,Coon's Technique,Fluorescent Antinuclear Antibody Test,Fluorescent Protein Tracing,Immunofluorescence Technique,Coon's Technic,Fluorescent Antibody Technic,Immunofluorescence,Immunofluorescence Technic,Antibody Technic, Fluorescent,Antibody Technics, Fluorescent,Antibody Technique, Fluorescent,Antibody Techniques, Fluorescent,Coon Technic,Coon Technique,Coons Technic,Coons Technique,Fluorescent Antibody Technics,Fluorescent Antibody Techniques,Fluorescent Protein Tracings,Immunofluorescence Technics,Immunofluorescence Techniques,Protein Tracing, Fluorescent,Protein Tracings, Fluorescent,Technic, Coon's,Technic, Fluorescent Antibody,Technic, Immunofluorescence,Technics, Fluorescent Antibody,Technics, Immunofluorescence,Technique, Coon's,Technique, Fluorescent Antibody,Technique, Immunofluorescence,Techniques, Fluorescent Antibody,Techniques, Immunofluorescence,Tracing, Fluorescent Protein,Tracings, Fluorescent Protein
D000918	Antibody Specificity	The property of antibodies which enables them to react with some ANTIGENIC DETERMINANTS and not with others. Specificity is dependent on chemical composition, physical forces, and molecular structure at the binding site.	Antibody Specificities,Specificities, Antibody,Specificity, Antibody
D012703	Serotyping	Process of determining and distinguishing species of bacteria or viruses based on antigens they share.	Serotypings
D013296	Streptococcus pneumoniae	A gram-positive organism found in the upper respiratory tract, inflammatory exudates, and various body fluids of normal and/or diseased humans and, rarely, domestic animals.	Diplococcus pneumoniae,Pneumococcus