Background: Salmonella enterica subsp. enterica serovar Mississippi. 

NCBI PD link for serovar Mississippi: https://www.ncbi.nlm.nih.gov/pathogens/isolates/#(salmonella%20)%20AND%20computed_types:(%22serotype=Mississippi%22)

Animal reservoir: Serovar Mississippi has been found in dogs. 

Geographical distribution: Endemic in Australia, the United Kingdom, and the United States. 

Outbreaks: 

Relevant links and references:

1. https://journals.asm.org/doi/10.1128/msphere.00485-21
2. https://pmc.ncbi.nlm.nih.gov/articles/PMC6711244/
3. https://doi.org/10.1111/zph.13174