Korean J Vet Res.  2013 Jun;53(2):95-101.

Comparative evaluation of the murine immune responses to Salmonella enterica serovars Enteritidis, Gallinarum and Typhimurium infection

Affiliations
  • 1College of Veterinary Medicine & Institute of Veterinary Science, Kangwon National University, Chuncheon 200-701, Korea. twhahn@kangwon.ac.kr
  • 2College of Pharmacy, Kangwon National University, Chuncheon 200-701, Korea.
  • 3College of Veterinary Medicine, Jeju National University, Jeju 690-756, Korea.

Abstract

The study was carried out to evaluate and compare the immune responses in mice experimentally infected with either wild-type or isogenic mutants of Salmonella enterica serovars Enteritidis (SE), Salmonella Typhimurium (ST) and Gallinarum (SG). The mutant strains were constructed by allelic replacement of some virulence-associated genes in the wild-type strains. Seven-week-old female BALB/c mice were orally or intraperitoneally inoculated by injecting bacterial suspension. To evaluate the immune responses, enzyme-linked immunosorbent assay (ELISA) and enzyme-linked immunospot (ELISPOT) assay were conducted with serum and fecal samples. As a result, the mice group infected orally with the SE mutant strain showed the highest level of specific IgA-secreting splenocytes, compared to the other groups. The peritoneally injected groups showed the greater levels of IgG1 than the orally injected groups, which was in a good agreement with the previous studies. In addition, the mutant infected groups had the similar secretion levels of antibodies with the wild-type infected groups. These results demonstrated that the SE mutant strain elicited humoral immune response as much as wild-type, implying that it can be useful as a delivery vehicle as well as a candidate of a live attenuated vaccine.

Keyword

humoral immunity; mucosal immunity; Salmonella

MeSH Terms

Animals
Antibodies
Enzyme-Linked Immunosorbent Assay
Female
Humans
Immunity, Humoral
Immunity, Mucosal
Immunoglobulin G
Mice
Salmonella
Salmonella enterica
Salmonella typhimurium
Sprains and Strains
Antibodies
Immunoglobulin G
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