Article
Immunity to experimental fowl typhoid in chickens induced by a virulence plasmid-cured derivative of Salmonella gallinarum.
Infection and immunity - 1 Jul 1990
Barrow P A
Abstract excerpt
Chickens were immunized by two intramuscular inoculations at 1 and 14 days of age with virulence plasmid-cured derivatives of Salmonella gallinarum and were challenged 14 days later by oral inoculation of ca. 50 50% lethal doses (LD50) of fully virulent S. gallinarum 9. Mortality in the nonimmunized and immunized groups were 36 and 3%, respectively. This difference was highly significant (P less than 0.01). A...
Topics
- Administration, Oral
- Animals
- Bacterial Vaccines
- Chickens
- Colony Count, Microbial
- Escherichia coli
- Injections, Intramuscular
- Mutation
- Plasmids
- Poultry Diseases
- Salmonella