Protein deprivation causes reversible impairment of mucosal immune response to cholera toxoid/toxin in rat gut

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Abstract
Scretory antibodies may be the major defence against mucosal infections, especially those due to viruses and non-invasive pathogens such as Vibrio cholerae and toxinogenic Escherichia coli. The high incidence of mucosal infections in malnourished protein-deficient children may result from defective antibody production, but evidence for this is conflicting. We report here that protein deficiency markedly impairs the mucosal immune reponse to cholera toxiod/toxin (CT), a protein antigen, in rats and that this impairment is rapidly reversed by refeeding.