Pneumococcal antigens and serum antibody responses in experimentally induced sinusitis.
Maxillary sinusitis was induced in New Zealand White rabbits with Streptococcus pneumoniae serotype 3 and the serum antibody response was recorded by enzyme immunoassay. Activity of the three major immunoglobulin classes, viz. IgG, IgA and IgM, against the type-specific capsular polysaccharide, the cell wall C-polysaccharide as well as its subunit phosphorylcholine was analyzed. A pronounced increase in immunoglobulins reactive to the specific capsular antigen was observed throughout the study period, with the rise being particularly noticeable during the first 2 weeks. An increase in anti-C-polysaccharide antibodies was also evident, but no reaction to phosphorylcholine could be detected. Although the histological findings at 3 and 4 weeks varied in spite of similar serum antibody responses, a correlation appeared to exist between a more rapidly increasing anti-capsular IgG production and the prevalence of a purulent sinus secretion.
Westrin
K M
KM
Department of Otorhinolaryngology, Huddinge Hospital, Karolinska Institute, Sweden.
Freijd
A
A
Stierna
P
P
D000818:Animals; D000907:Antibodies, Bacterial / Q000032:analysis / Q000096:biosynthesis*; D000942:Antigens, Bacterial / Q000276:immunology*; D016667:Bacterial Capsules / Q000276:immunology; D007070:Immunoglobulin A / Q000032:analysis / Q000096:biosynthesis; D007074:Immunoglobulin G / Q000032:analysis / Q000096:biosynthesis; D007075:Immunoglobulin M / Q000032:analysis / Q000096:biosynthesis; D015523:Maxillary Sinusitis / Q000382:microbiology* / Q000473:pathology; D011008:Pneumococcal Infections / Q000276:immunology* / Q000473:pathology; D011135:Polysaccharides, Bacterial / Q000276:immunology; D011817:Rabbits; D013296:Streptococcus pneumoniae / Q000276:immunology*
D000907:Antibodies, Bacterial; D000942:Antigens, Bacterial; D007070:Immunoglobulin A; D007074:Immunoglobulin G; D007075:Immunoglobulin M; D011135:Polysaccharides, Bacterial