In:
Clinical and Vaccine Immunology, American Society for Microbiology, Vol. 16, No. 7 ( 2009-07), p. 1087-1090
Abstract:
Community-acquired pneumonia (CAP) can be caused by a variety of microorganisms but is most frequently associated with Streptococcus pneumoniae and gram-negative bacteria like Haemophilus influenzae . Encapsulated bacteria are able to escape phagocytosis, unless they are bound by immunoglobulin G2 subclass antibodies. These antibodies interact with Fcγ receptor IIa (Fcγ-RIIa), thereby facilitating opsonophagocytosis of the encapsulated bacteria. We studied the relationship between the Fcγ-RIIa-R/H131 polymorphism and the clinical course of CAP and pathogen-specific susceptibility. Regarding methodology, the Fcγ-RIIa genotype R/H131 was determined in 200 patients with CAP and in 313 healthy controls and was correlated with the clinical course, laboratory parameters, and causative microorganism. The Fcγ-RIIa-R/R131 genotype was found more frequently in patients with severe sepsis (odds ratio [OR], 2.55; 95% confidence interval [CI] , 1.30 to 5.00; P 〈 0.01). The majority of patients in this group suffered from invasive pneumococcal disease. The duration of hospital stay was longer for patients with the Fcγ-RIIa-R/R131 genotype. Fcγ-RIIa genotypes were not associated with an increased risk of CAP in general; however, the Fcγ-RIIa-R/R131 genotype was found more frequently in patients with CAP caused by H. influenzae than in controls (OR, 3.03; CI, 1.04 to 9.09; P 〈 0.05). In conclusion, the Fcγ-RIIa-R/R131 genotype is associated with severity of CAP and is more frequent in CAP caused by H. influenzae .
Type of Medium:
Online Resource
ISSN:
1556-6811
,
1556-679X
DOI:
10.1128/CVI.00037-09
Language:
English
Publisher:
American Society for Microbiology
Publication Date:
2009
detail.hit.zdb_id:
1496863-0
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