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Background: Salmonella enterica subsp. enterica (antigenic formula 35:z₄,z₂₃:– [z₃₇],[z₄₅]) is a serovar of the O:35 (O) serogroup. This serovar was first isolated from swine in Florida, US, in 1952. 

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

Genetic characteristics: Serovar Alachua has been found to be polyphyletic with two lineages identified. The five outbreak strains exhibited nalidixic acid minimum inhibitory concentration values exceeding the threshold (≥256 μg/mL) and demonstrated reduced susceptibility to ciprofloxacin (minimum inhibitory concentration = 0.5 μg/mL).

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1. https://journals.asm.org/doi/pdf/10.1128/jb.66.1.118-118.1953
2. https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2025.1547190/full
3. https://www.sciencedirect.com/science/article/pii/S1413867015000288?via%3Dihub
4. https://www.sciencedirect.com/science/article/pii/S003257911936835X