Effects of crp deletion in Salmonella enterica serotype Gallinarum
Author Information
Author(s): Valentina Rosu, Mark S Chadfield, Antonella Santona, Jens P Christensen, Line E Thomsen, Salvatore Rubino, John E Olsen
Primary Institution: Department of Biomedical Science, University of Sassari; Department of Veterinary Pathobiology, Faculty of Life Sciences, University of Copenhagen
Hypothesis
The study investigates the effect of crp deletion on the virulence and biochemical properties of Salmonella enterica serotype Gallinarum and its potential as a vaccine candidate.
Conclusion
The crp deletion in Salmonella Gallinarum caused attenuation, suggesting that these mutated strains could be viable candidates for live vaccines against fowl typhoid.
Supporting Evidence
- The crp deletions caused complete attenuation of S. Gallinarum.
- Oral inoculation with S. Gallinarum Δcrp completely protected against challenge with wild type S. Gallinarum.
- The mutations did not cause the same biochemical and growth changes to the two biotypes of S. Gallinarum.
Takeaway
Scientists removed a gene from a type of bacteria that makes chickens sick, and the modified bacteria didn't make the chickens sick, which means it could be used to create a vaccine.
Methodology
Mutants were constructed using P22 transduction, and their effects were characterized through biochemical tests and chicken infection models.
Limitations
The protective ability of the crp mutants was only tested once, requiring further confirmation.
Participant Demographics
Six-day-old chickens were used for the infection experiments.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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