Analytical Study on the Inoculation Effect of Live Fowl Typhoid Vaccine (SG9R) Using National Big Data (AIMS) for 28 Years Since 1995

After fowl typhoid (FT) incidence rapidly increased in domestic poultry farms after the late 1990s, the Korean government decided to introduce an attenuated live FT vaccine (SG9R) in 2001, despite a lack of preparation, in response to strong complaints from poultry farmers. Therefore, this study aimed to determine whether the FT-protective effect of the live vaccine (SG9R) was properly expressed in areas that were seriously contaminated with FT, such as in Korea. This study examined the protective effect of the live vaccine (SG9R) through an analysis of the changes in FT outbreaks in poultry farms across the country using national big data (AIMS) for a total of 28 years (from 1995 to early 2023). The results of the analysis of the national AIMS data over the 28-year period showed that the attenuated live FT vaccine (SG9R) was introduced with insufficient preparation but still produced a positive FT protective effect in poultry farms that were seriously contaminated with FT in Korea.