Journal of Veterinary Diagnostic Investigation, Vol 8, Issue 3, 310-314
Copyright © 1996 by American Association of Veterinary Laboratory Diagnosticians
A dot immunobinding assay (dot-ELISA) for the rapid serodiagnosis of Salmonella enteritidis infection in chickens
SD Charles,
S Sreevatsan,
RF Bey,
V Sivanandan,
DA Halvorson,
and
KV Nagaraja
Department of Veterinary PathoBiology, College of Veterinary Medicine, University of Minnesota, St. Paul 55108, USA.
A dot immunobinding assay (DIA) was developed for the detection of antibodies to Salmonella enteritidis. Western blot analysis of outer membrane proteins from SE identified 2 polypeptides of molecular masses 43 and 46 kD that were specific for S. enteritidis. These 2 polypeptides were utilized as antigens in the DIA. The DIA was tested on sera from chickens experimentally infected with S. enteritidis. Results of the DIA were compared with that of conventional microagglutination and serum plate tests. The DIA was a highly specific and sensitive test that can be useful for screening birds to determine if they are infected with S. enteritidis. Its simplicity, reliability, reproducibility, and speed in interpreting the assay results makes it a useful screening test for flock monitoring.
