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Background: Salmonella enterica subsp. enterica serovar Oslo (antigenic formula 6,7,14:a:e,n,x) is a serovar of the serogroup O:7 (C1). Strains in this group can be lysogenized by phage 14 (O:6,7 ––> O:6,7,14, former group C4). The Oslo serotype is In US, serovar Oslo was considered rare with about 25 cases reported each year in the US..
NCBI PD link for serovar Oslo: https://www.ncbi.nlm.nih.gov/pathogens/isolates/#(taxgroup_name:%22Salmonella%20enterica%22)%20AND%20computed_types:(%22serotype=Oslo%22)
Genetic characteristics:
Animal reservoir: Unknown, serovar Oslo was previously isolated from seafood and monkeyAnimal reservoir: Serovar Oslo was found in squid.
Geographical distribution:Serovar According to the metadata from NCBI PD (accessed May 13, 2025), serovar Oslo has primarily been found reported in India US and UK, and US. with 441 and 269 isolates, respectively, out of 840 serovar Oslo isolates available on NCBI PD.
Human outbreaks:
Year | Location | Associated source | Number of cases | ||
2023 | US: LA | 28 | |||
2016 | US: multistate | 14 | |||
20231974 | US: LA | Crawfish | NY | 528 |
Border rejections:
Year | Exporting country | Importing country | Associated source | Product category |
|---|---|---|---|---|
| 2020 | Thailand | Germany | Frozen chicken breast1 | Poultry meat and poultry meat products |
1 Consignment was released later.
Recalls:
| Year | Location | Recalled food | Type |
|---|---|---|---|
| 2022 | Germany, Luxembourg, Northern Ireland | Organic tahini from Germany, made with raw material from Uganda1 | Nuts, nut products and seeds |
1 Salmonella Oslo and Korovi were found.
Relevant links:
- https://pmc.ncbi.nlm.nih.gov//webgate.ec.europa.eu/rasff-window/screen/notification/434548articles/PMC6930137/
- https://stacks.cdc.gov/view/cdc/58537/cdc_58537_DS1.pdf
- https://event.fourwaves.com/inform/abstracts/d3671885-2a45-4774-8db4-7e8e800cfc41
- https://www.cdc.gov/mmwr/volumes/65/wr/mm655051a3.htm
- https://pubmed.ncbi.nlm.nih.gov/1251848/
- https://webgate.ec.europa.eu/rasff-window/screen/notification/580385434548
- https://wwwwebgate.ec.cdceuropa.goveu/mmwrrasff-window/volumesscreen/65/wr/mm655051a3.htmnotification/580385
- http://www.serotest-thailand.com/upload/news/download/9-8310-0.pdf
- https://event.fourwaves.com/inform/abstracts/d3671885-2a45-4774-8db4-7e8e800cfc41
- https://www.sciencedirect.com/science/article/pii/0002934376904290?via%3Dihub
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6930137/
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2643569/