Abstract
Poultry vaccine programs are important for control of Salmonella infections. Although there are vaccines for Salmonella Enteritidis, Salmonella Typhimurium and Salmonella Typhi, there are no vaccines for Salmonella Infantis which has an increased rate in the world. In this study, it was aimed to generate aroA gene deleted mutant bacteria for the constitution of S. Infantis vaccine prototype and the in vitro characterisation of this bacterium. S. Infantis auxotrophic mutant which has a block at any step of chorismate pathway has been constituted for the first time in the world and it was determined that this bacterium gets susceptibility against some antibiotics and antimicrobial substances. It was also observed that the adhesion and invasion rate of mutant strain tenfold decreased in comparison with the field strain in cell culture assay. It is understood from the in vitro evaluation of this mutant strain that it can be used as a vaccine candidate in further vaccine development studies.
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