Seo KH, Holt PS, Brackett RE, Gast RK, Stone HD. Mucosal humoral immunity to experimental Salmonella enteritidis infection in the chicken crop.
Avian Dis 2002;
46:1015-20. [PMID:
12495067 DOI:
10.1637/0005-2086(2002)046[1015:mhites]2.0.co;2]
[Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
In this report, we show that chickens, infected with Salmonella enteritidis (SE) by oral gavage, produce secretory immunoglobulin As (sIgAs) that specifically bind to numerous SE antigens. Chickens infected with SE showed strong sIgA response against flagella in both bile and crop. The optical density values of enzyme-linked immunosorbent assay (ELISA) tests in positive bile and crop were 1.17 and 0.38, respectively, and were significantly different from those of negative samples. Western immunoblotting revealed that approximately 13.5-, approximately 56-, approximately 62-, approximately 80-, and approximately 143-kD polypeptides were immunodominant proteins in bile, whereas approximately 56-, approximately 62-, and approximately 80-kD polypeptides were found to be strong antigens in crop. These results indicate that the crop may function as another site for mucosal immunity, and the SE flagella-based ELISA of crop samples can provide a useful screening test of SE exposure in chickens.
Collapse