Background: Salmonella enterica subsp. enterica (antigenic formula 35:z4,z23:–) 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).

Animal reservoir: Serovar Alachua was mainly found in chicken but was also present in pigs, and turkey.   

Geographical distribution: Although serovar Alachua has been reported worldwide, it is more frequently found in the countries such as the US, and UK. 

Human outbreaks:

YearLocationAssociated sourceNumber of cases
2012BrazilMayonnaise salad and galinhada (a traditional Brazilian dish of chicken and rice)66

Border rejections: There have been no recent border rejections linked to this serovar.

Recalls: There have been no recent recalls linked to this serovar.

Relevant links:

  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
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