Abstract
We have used the ability of opsonized bacteria to stimulate luminol-enhanced chemiluminescence (CL) of human polymorphonuclear leukocytes (PMN) to examine the opsonic capabilities of commercially available human intravenous immunoglobulin (i.v.Ig) preparations. The method was tested against 14 strains of drug-resistant gram-positive bacteria (including methicillin-resistant Staphylococcus aureus, hetero-vancomycin-resistant S. aureus, vancomycin-resistant enterococci, penicillin-resistant Streptococcus pneumoniae), and 23 strains of gram-negative bacteria (including extended-spectrum beta-lactamase-producing bacteria, metallo-beta-lactamase-producing bacteria, beta-lactamase-negative ampicillin-resistant Haemophilus influenzae). An Fc-intact i.v.Ig preparation treated with polyethylene glycol (PEG) was evaluated for opsonization effectiveness against these bacteria in vitro. The opsonization of these organisms was enhanced by an Fc-intact i.v.Ig, and the opsonic activity was dose dependent. A pepsin-treated i.v.Ig preparation exhibited poor opsonic activity for all bacteria tested. These results suggest that Fc-intact i.v.Ig, which augments opsonic activity against various drug-resistant bacteria, will be a useful addition to t...Continue Reading
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Citations
Mar 28, 2013·European Journal of Clinical Microbiology & Infectious Diseases : Official Publication of the European Society of Clinical Microbiology·N FaragM El-Azizi
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