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Antiphagocytic Effect of Slime from a Mucoid Strain of Pseudomonas Aeruginosa

Overview
Journal Infect Immun
Publisher American Society for Microbiology
Specialty Allergy & Immunology
Date 1971 Jun 1
PMID 16558051
Citations 92
Authors
S Schwarzmann
J R Boring
Affiliations
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Abstract

Mucoid strains of Pseudomonas aeruginosa produce a viscid slime when grown on the surface of agar media. These strains are known to colonize persistently the tracheobronchial tree of children with cystic fibrosis. Colonization may result from inhibition of phagocytosis due to slime produced by the organism. Slime separated from one mucoid strain was examined to determine whether it possessed antiphagocytic activity in vitro. Cells of P. aeruginosa, Escherichia coli, and Staphylococcus aureus were rapidly phagocytized by rabbit polymorphonuclear leukocytes when mixtures were rotated for 2 hr at 37 C in the absence of slime. The addition of relatively small amounts of slime to bacteria and leukocytes inhibited phagocytosis as measured by phagocytic killing of the organisms. Inhibition was found to be most complete with P. aeruginosa.

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