Antibodies to pneumococcal polysaccharides in human milk: Lack of relationship to colonization and acute otitis media

被引:12
作者
Rosen, IAV
Hakansson, A
Aniansson, G
Hansson, C
Andersson, B
Nylen, O
Sabharwal, H
Svanborg, C
机构
[1] LUND UNIV, DEPT MED MICROBIOL, DIV CLIN IMMUNOL, S-22362 LUND, SWEDEN
[2] GOTHENBURG UNIV, DEPT CLIN IMMUNOL, GOTHENBURG, SWEDEN
[3] GOTHENBURG UNIV, DEPT OTORHINOLARYNGOL, GOTHENBURG, SWEDEN
关键词
Streptococcus pneumoniae; capsular polysaccharides; phosphorylcholine; C-polysaccharide; IgA antibodies; acute otitis media; nasopharyngeal colonization;
D O I
10.1097/00006454-199606000-00006
中图分类号
R392 [医学免疫学]; Q939.91 [免疫学];
学科分类号
100102 ;
摘要
Background. This study analyzed antibodies to pneumococcal polysaccharides in human milk and their effect on nasopharyngeal colonization and acute otitis media in breast-fed infants. Methods. A total of 503 milk samples were collected from 310 mothers. Nasopharyngeal cultures were obtained from their children at 2, 6 and 10 months postpartum, and the capsular groups/types of the Streptococcus pneumoniae isolates were determined. Results. Types 6A, 6B, 19A, 19F and 23F accounted for 54% of the pneumococcal isolates, but type 3 isolates were uncommon. Milk samples were analyzed for antibody activity to the common capsular polysaccharide types 6A, 19F and 23F; to the type 3 polysaccharide; to C-polysaccharide; and to phosphorylcholine (PC), a major component of the pneumococcal cell wall polysaccharide (CWPS). Anti-capsular antibody activity was low or absent in >90% of the milk samples. In contrast anti-PC antibody activity was detected in 88% and anti-CWPS in 84% of the samples. The frequency of acute otitis media did not vary with the milk anti-capsular, anti-PC or anti-CWPS antibody activity. Conclusions. There was no reduction in nasopharyngeal carriage of S. pneumoniae among children fed milk with anti-capsular or anti-PC antibody activity, but carriage was increased in those children who received milk with anti-CWPS antibody activity. A protective role of anti-polysaccharide or anti-CWPS antibodies in milk was not detected under the study conditions.
引用
收藏
页码:498 / 507
页数:10
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