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Background Information: Salmonella enterica subsp. enterica serovar Pomona (antigenic formula 28:y:1,7) is a serovar of the O:28 (M) serogroup. This serovar was first isolated 1941 from poultry. In a study of Salmonella from pet animals in China, serovar Pomona was identified as being the leading serovar identified in turtles (25%, 18/71). 

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

Genetic Characteristics: A study of Salmonella in pets found some multi-drug resistant isolates of serovar Pomona in cats and turtles and 6 isolates from turtles that contained extended-spectrum beta-lactamase genes. A study of clinical and environmental serovar Pomona genomes found that the many of the environmental strains had genes for the type 4 secretion system (T4SS) and identified genes associated with virulence factors such as fimbriae production and invasion regulation (invA, invB, invC, fimA, fimC, fimD, and fimF) from clinical and environmental samples. 

Animal Reservoir: This serovar has been commonly found in turtles and other reptiles, including alligators. 

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1. https://doi.org/10.1093/oxfordjournals.aje.a118994

2. https://doi.org/10.1128/spectrum.03542-23

3. https://doi.org/10.1016/j.scitotenv.2013.08.025
4. https://doi.org/10.1177/0300985816677149
5. https://www.cdc.gov/salmonella/outbreaks/turtles-08-23/index.html
6. https://www.cdc.gov/salmonella/outbreaks/stanley-07-22/investigation.html
7. https://archive.cdc.gov/www_cdc_gov/salmonella/small-turtles-03-12/index.html