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Phylogenetic and pan-genomic analyses that included two of the sequenced S. Heidelberg strains and other Salmonella serovars concluded that S. Heidelberg (i) belongs to clade A, according to den Bakker et al. (2011) classification, (ii) appears to have a single evolutionary origin, and (iii) contains 74 gene families unique to this serovar.  

Genome sequences available:

1. Salmonella enterica subsp. enterica serovar Heidelberg str. 41563 http://www.ncbi.nlm.nih.gov/assembly/481988/
2. Salmonella enterica subsp. enterica serovar Heidelberg str. 41565 http://www.ncbi.nlm.nih.gov/assembly/482048/
3. Salmonella enterica subsp. enterica serovar Heidelberg str. 41566 http://www.ncbi.nlm.nih.gov/assembly/482028/
4. Salmonella enterica subsp. enterica serovar Heidelberg str. 41573 http://www.ncbi.nlm.nih.gov/assembly/482008/
5. Salmonella enterica subsp. enterica serovar Heidelberg str. 41578 http://www.ncbi.nlm.nih.gov/assembly/41121/
6. Salmonella enterica subsp. enterica serovar Heidelberg str. 41579 http://www.ncbi.nlm.nih.gov/assembly/481968/
7. Salmonella enterica subsp. enterica serovar Heidelberg str. B182 http://www.ncbi.nlm.nih.gov/assembly/377398/
8. Salmonella enterica subsp. enterica serovar Heidelberg str. CFSAN002069 http://www.ncbi.nlm.nih.gov/assembly/41111/
9. Salmonella enterica subsp. enterica serovar Heidelberg str. CFSAN00322 http://www.ncbi.nlm.nih.gov/assembly/493148/
10. Salmonella enterica subsp. enterica serovar Heidelberg str. CFSAN00325 http://www.ncbi.nlm.nih.gov/assembly/493168/
11. Salmonella enterica subsp. enterica serovar Heidelberg str. CFSAN00326 http://www.ncbi.nlm.nih.gov/assembly/493188/
12. Salmonella enterica subsp. enterica serovar Heidelberg str. CFSAN00328 http://www.ncbi.nlm.nih.gov/assembly/493208/
13. Salmonella enterica subsp. enterica serovar Heidelberg str. SARA33 http://www.ncbi.nlm.nih.gov/assembly/62751/
14. Salmonella enterica subsp. enterica serovar Heidelberg str. SL476 http://www.ncbi.nlm.nih.gov/assembly/41748/
15. Salmonella enterica subsp. enterica serovar Heidelberg str. SL486 http://www.ncbi.nlm.nih.gov/assembly/210978/

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Border rejections:

Recalls:

¹ Tyson Foods, Inc. issued a recall of around 33,840 pounds of mechanically separated chicken products due to potential contamination with Salmonella Heidelberg. These products were manufactured on October 11, 2013, and distributed exclusively for institutional use across the nation.

Relevant links:

1. https://archive.cdc.gov/www_cdc_gov/salmonella/heidelberg-01-14/advice-institutions.html
2. http://www.cdc.gov/salmonella/heidelberg-02-13/
3. http://www.cdc.gov/salmonella/heidelberg-10-13/index.html
4. http://jcm.asm.org/content/41/9/4279.full
5. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3569330/
6. https://www.cdc.gov/salmonella/heidelberg-11-16/index.html
7. https://doi.org/10.1111/zph.13174