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Background: Salmonella enterica subsp. enterica serovar London (antigenic formula 3,{10}{15}:l,v:1,6) is a serovar of the O:3,10 (E1) serogroup.E₁) serogroup. According to the European Food Safety Authority (EFSA) and European Centre for Disease Prevention and Control (ECDC), serovar London has entered the top 20 list of most frequent Salmonella serovars in Europe.

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

Genetic characteristics: In a nosocomial outbreak associated with serovar London, Yong et al. identified the CTX-M-14-type extended-spectrum β-lactamase-producing strains. All these outbreak strains were multidrug resistant, while the other London strains reported were susceptible to multiple antibiotics, including ampicillin, suggesting the susceptible clone retained the resistance. 

Animal reservoir:

Geographical distribution: According to the metadata from NCBI PD, serovar London has been reported worldwide but mainly in US, China, and UK. 

Human outbreaksOutbreaks: 

Border Rejections: 

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Year

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Location

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Food

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2019

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Germany

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Frozen Pig Intestine

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

Relevant links and references:

1. http://www.scacmfoodsafetynews.org/free/Antigenic%20Formulae%20of%20the%20Salmonella%20Serovars%202007%209th%20edition.pdfhttpcom/?s=serovar+london
2. https://analytics.foodtrack.net/cgi-bin/read?rid=MjAxOTAyMjExMzQ0Rk9PRFRSQ0tCVUxMRVRTXzAyMjExOUw0MjY=&style=html&source=emailjournals.asm.org/doi/10.1128/jcm.43.7.3519-3521.2005
3. https://www.ncbi.nlm.nih.gov/pubmed/15004867