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Background: Salmonella enterica subsp. enterica serovar Bredeney (antigenic formula 1,4,12,27:l,v:1,7 [z₄₀]) is a serovar of the O:4 (B) serogroup. Serovar Bredeney is a rare serovar, in the US, 405 cases were reported in humans between 1999-2009; in addition, 11 isolates were obtained from turkeys in the US during the same period. In Ireland, a different trend was observed, as it was reported as the third most common serovar during the years 1998-2000.

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

Genetic characteristics: Serovar Bredeney has been found to be paraphyletic. A non-Bredeney serovar, S. Give, clusters within serovar Bredeney. In the Netherlands one isolate of serovar Bredeney was reported to harbor an IncN plasmid carrying the qnr genes (quinolone resistance genes). Among 112 isolates collected in Ireland, a high proportion (74%) of isolates were susceptible to all antimicrobial agents tested, while 21% showed resistance to both sulfonamide and trimethoprim, and a single isolate (0.9%) exhibited resistance to multiple (five) antimicrobial agents.

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