Abstract:

This experiment was conducted to investigate the distribution and the dominant serotype’s mutation of avian Salmonella in Eastern China. Using the methods of enrichment, purification, Polymerase Chain Reaction (PCR), serotype identification and biochemical identification, 1 730 samples were detected and seven isolates with mutated serotypes were sequenced to analyze serotypes of avian Salmonella. The results showed that 87 isolates were identified as Salmonella and belong to five subtypes, including S. typhimurium, S. derby, S. saintpaul, S. pullorum and S. abaetetuba. Furthermore, Hd and Hg were mutated in seven S. pullorum isolates. These results indicated that poultry were mainly infected by S. pullorum in Eastern China. The serotype of the seven S. pullorum isolates mutated and the mutated rate was increasing. The research provided the experimental evidence of serotypes’ distribution and mutated serotypes in Salmonella isolates.