Background: Salmonella enterica subsp. enterica serovar (S.) Dessau (antigenic formula 1,3,15,19:g,s,t:–) is a
serovar of the O:1,3,19 (E4) serogroup. This serovar is extremely rare and was only isolated from
retail chicken meat in Korea and patients in Germanywith only few isolates
described by January 2023. S. Dessau has reaction against antisera 15
(O15) which is caused by
phage conversion. More specifically, when a specific prophage
integrates into the S. Dessau chromosome, S. Dessau then acquires the O15 antigen. Additionally,
under the OWithin the O:1,3,19 (E4) serogroup, another the serovar S. Senftenberg with the (antigenic
formula
1,3,19:g,[s],t:–) is closely related to serologically similar to, and much more common than S. Dessau.
Given the high similarity between the two
antigenic formulae of these two serotypes, in silico
serotyping tools such as SeqSero2 will
classify and SISTR may classify isolates serologically classified as S.
Dessau isolate which was serologically confirmed as S. Senftenberg.
Animal reservoir: Serovar Dessau was found in retail chicken meat.
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