Are IgGs secreted in the gut?

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jackclj
jackclj's picture
Are IgGs secreted in the gut?

Hi,
   I was reading a paper about a phase II clinical trial involving IV injection of monoclonal anti-toxin IgGs againt C. difficile toxine A and B. I thought that only IgA were secreted in the gut... How can an IV of IgG be effective against a bug in the gut?
(Leav et al 2010 Vaccine 28 (2010) 965–969)
Thanks