Locally produced mucosal IgG in chickens immunized with conventional vaccines for Newcastle disease virus
Braz. j. med. biol. res
;
41(4): 318-323, Apr. 2008. graf
Article
in English
| LILACS
| ID: lil-479678
ABSTRACT
Newcastle disease virus (NDV) is the causative agent of an economically important disease, which affects all species of birds worldwide. Current vaccination programs for NDV include the use of either low-virulent live-virus vaccines or inactivated vaccines to induce protective immunity while producing minimal adverse effects in birds. In order to further characterize the immune response elicited by live virus and inactivated NDV conventional vaccines in chickens, we evaluated the presence of specific antibodies in different secretions and in tissue culture supernatants of immunized birds. To this end, we analyzed all the samples by ELISA, using an indirect assay set up in the laboratory. Specific anti-NDV IgG antibodies were detected in tracheal and cloacal swabs and tracheal and intestinal washes of immunized animals. We also found specific anti-NDV IgG antibodies in tracheal and intestinal tissue culture supernatants, indicating that the IgG found in swabs and washes was not transudated from serum or, at least, was not all transudated from serum. Knowledge about the mechanisms involved in the immune response of chickens to different NDV vaccines should increase our understanding of the mucosal response against the virus and, eventually, provide new useful information for the development and evaluation of synthetic vaccines.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Newcastle disease virus
/
Immunoglobulin G
/
Viral Vaccines
/
Vaccination
/
Newcastle Disease
Limits:
Animals
Language:
English
Journal:
Braz. j. med. biol. res
Journal subject:
Biology
/
Medicine
Year:
2008
Type:
Article
Affiliation country:
Argentina
Institution/Affiliation country:
Instituto Nacional de Tecnología Agropecuaria/AR
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