Abstract:
:Liposome-associated fimbriae antigens (SEF14 and SEF21) were prepared for intraocular immunization to seek protective efficacy for intestinal infection with Salmonella enterica serovar Enteritidis. Chickens were immunized intraocularly with the antigens at 8 and 10 weeks of age. Evidence of an IgA and IgG responses were found in the intestinal tract and in sera of these chickens. Antibody-secreting lymphocytes were detected in the Harderian gland of immunized chickens as determined by enzyme-linked immunospot assay. Two weeks after the booster immunization, the chickens were challenged orally with 1x10(7) live Salmonella Enteritidis, and fecal samples were examined for bacterial excretion from the intestinal tract. Significantly less fecal excretion of bacteria was observed in immunized chickens for 15 days after challenge. The numbers of bacteria in the intestinal contents (caecum and rectum) were also significantly lower in immunized chickens than in unimmunized controls. Detection of S. Enteritidis-specific DNA by the polymerase chain reaction was consistent with the bacterial observations. Intraocular immunization with liposome-associated SEF14 and SEF21 therefore elicits both systemic and mucosal antibody responses, so that bacterial colonization in the intestinal tract and excretion of S. Enteritidis in the feces are suppressed by immunization.
journal_name
Dev Comp Immunoljournal_title
Developmental and comparative immunologyauthors
Li W,Watarai S,Iwasaki T,Kodama Hdoi
10.1016/s0145-305x(03)00086-7keywords:
subject
Has Abstractpub_date
2004-01-01 00:00:00pages
29-38issue
1eissn
0145-305Xissn
1879-0089pii
S0145305X03000867journal_volume
28pub_type
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