jejuni strain, although increased serum and fecal IgG and IgA antibodies were observed after first infection.35 Moreover, a case report of an immunocompetent volunteer did not show any acquired immune response against reinfection by C. jejuni. 36 Lack of protection against C. jejuni infections has been mainly observed in immunocompromised subjects and those at the extremes of age.37 Fimlaid and others obtained similar results when specific antibodies and cytokines were measured against a homologous rechallenge against C. jejuni CG8421.38 This evidence concerns the gene CD79A and infection.