Effect of immunisation with Pseudomonas aeruginosa on gut-derived sepsis in mice

J Med Microbiol. 1998 Apr;47(4):295-301. doi: 10.1099/00222615-47-4-295.

Abstract

The protective efficacy of immunisation with heat-killed Pseudomonas aeruginosa on murine gut-derived sepsis was evaluated. Mice were immunised intraperitoneally six times with heat-killed bacteria. This induced mean (SEM) serum IgG and IgM antibodies of 1792 (374.7) and 37.3 (8.9) ELISA units, respectively. Specific pathogen-free mice given P. aeruginosa strain D4 orally died of bacteraemia after administration of cyclophosphamide. Immunisation with heat-killed bacteria significantly increased the survival rate compared with that of control mice immunised with bovine serum albumin. Macroscopic observation revealed marked production of liver abscesses in mice immunised with bovine serum albumin but not in those immunised with heat-killed bacteria. Only low titres of antibody against the exoenzymes alkaline protease, elastase and exotoxin A were observed, and no significant difference between antibody titres to boiled and unboiled suspensions of sonicated P. aeruginosa was detected. This suggests that the main protective antibodies might be those specific to the heat stable antigen (lipopolysaccharide). Immunisation with heat-killed bacteria provided complete protection against death from gut-derived P. aeruginosa sepsis.

MeSH terms

  • ADP Ribose Transferases*
  • Animals
  • Antibodies, Bacterial / biosynthesis
  • Antibodies, Bacterial / blood
  • Bacterial Toxins*
  • Bacterial Vaccines* / administration & dosage
  • Bacterial Vaccines* / immunology
  • Colony Count, Microbial
  • Disease Models, Animal
  • Endopeptidases / immunology
  • Exotoxins / immunology
  • Immunization*
  • Immunoglobulin G / biosynthesis
  • Immunoglobulin G / blood
  • Immunoglobulin M / biosynthesis
  • Immunoglobulin M / blood
  • Injections, Intraperitoneal
  • Liver / microbiology
  • Liver / pathology
  • Liver Abscess / microbiology
  • Liver Abscess / pathology
  • Liver Abscess / prevention & control
  • Male
  • Mice
  • Pancreatic Elastase / immunology
  • Pseudomonas Infections / prevention & control*
  • Pseudomonas aeruginosa / enzymology
  • Pseudomonas aeruginosa / immunology*
  • Specific Pathogen-Free Organisms
  • Vaccines, Inactivated / administration & dosage
  • Vaccines, Inactivated / immunology
  • Virulence Factors*

Substances

  • Antibodies, Bacterial
  • Bacterial Toxins
  • Bacterial Vaccines
  • Exotoxins
  • Immunoglobulin G
  • Immunoglobulin M
  • Vaccines, Inactivated
  • Virulence Factors
  • ADP Ribose Transferases
  • toxA protein, Pseudomonas aeruginosa
  • Endopeptidases
  • Pancreatic Elastase