title: Effects of infection with transmissible gastroenteritis virus on concomitant immune responses to dietary and injected antigens.
abstract: Normal piglets weaned onto soy- or egg-based diets generated antibody responses to fed protein. Concurrent infection with transmissible gastroenteritis virus (TGEV) did not affect the responses to dietary antigens at weaning, nor did it affect the subsequent development of tolerance. However, TGEV infection did enhance the primary immunoglobulin M (IgM) and IgG1, but not IgG2, antibody responses to injected soy in comparison to those of uninfected animals. Paradoxically, TGEV-infected animals showed an enhanced primary IgG1 antibody response to injected soy at 4 weeks of age, but they subsequently showed a reduced secondary response after an intraperitoneal challenge at 9 weeks of age in comparison to uninfected animals. The results suggest that an enteric virus, either used as a vaccine vector or present as a subclinical infection, may not have significant effects on the development of dietary allergies but may have effects both on the primary response and on the subsequent recall response to systemic antigens to which the animal is exposed concurrently with virus antigens.
authors.affiliation: Department of Clinical Veterinary Science, University of Bristol, Bristol BS40 5DU, United Kingdom.
authors.forename: Michael
authors.initials: M
authors.lastname: Bailey
authors.forename: Karin
authors.initials: K
authors.lastname: Haverson
authors.forename: Bevis
authors.initials: B
authors.lastname: Miller
authors.forename: Philip
authors.initials: P
authors.lastname: Jones
authors.forename: Isabel
authors.initials: I
authors.lastname: Sola
authors.forename: Luis
authors.initials: L
authors.lastname: Enjuanes
authors.forename: Christopher R
authors.initials: CR
authors.lastname: Stokes
mesh_terms: D000284:Administration, Oral; D000818:Animals; D000914:Antibodies, Viral / Q000097:blood; D000956:Antigens, Viral / Q000276:immunology* / Q000494:pharmacology*; D005260:Female; D005761:Gastroenteritis, Transmissible, of Swine / Q000276:immunology*; D007108:Immune Tolerance / Q000276:immunology; D007074:Immunoglobulin G / Q000097:blood; D007274:Injections, Intraperitoneal; D034421:Sus scrofa; D005760:Transmissible gastroenteritis virus / Q000276:immunology*; D014765:Viral Vaccines / Q000276:immunology / Q000494:pharmacology
chemical_list: D000914:Antibodies, Viral; D000956:Antigens, Viral; D007074:Immunoglobulin G; D014765:Viral Vaccines