Local intestinal immune response to Escherichia Coli heat-labile (LT) enterotoxin: LT antitoxin levels in healthy, diseased and antigen-fed pigs

  • Pesti L
  • Lukács K
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Abstract

With purified LT toxin and IgA, specific anti-LT enterotoxin activity was demonstrated in small intestinal contents of 27 pigs. After 60 days of age, rise in intestinal LT antitoxin titer was observed. Feeding LT containing E. coli antigen increased LT antibody levels in the intestinal secretions, but decreased antibody titers in sera. In post-weaning E. coli diarrhea LT antibody levels in intestinal secretions and sera decreased significantly. This phenomenon can be related to the occurrence of the frequently observed post-weaning E. coli diarrhea. © 1984.

Author-supplied keywords

  • E. coli diarrhea
  • IgA
  • LT enterotoxin
  • intestinal immune response

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Authors

  • L. Pesti

  • K. Lukács

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