Background: Salmonella enterica subsp. enterica serovar Schwarzengrund (antigenic formula 1,4,12,27:d:1,7) is a serovar of the O:4 (B) serogroup. S. Schwarzengrund is among the most common serovars in non-clinical non-human sources in the US. MDR strains (e.g., resistant to dihydrostreptomycin, kanamycin, oxytetracycline, bicozamycin, trimethoprim, and sulfadimethoxine) have been linked to broilers in Japan. In addition, fluoroquinolone resistant strains have been linked to imported food from Asia. For example, MDR S. Schwarzengrund was found to be transmitted from chickens to people in some countries in Asia.
Animal reservoir: Poultry is the main reservoir of S. Schwarzengrund
Geographical distribution: S. Schwarzengrund is prevalent in Asia and it has been found in Europe and the US as well.
Outbreaks: Outbreaks associated with S. Schwarzengrund have been reported in the US; in addition, in Denmark cases have been linked to Thai food products.
Year | Location | Associated source | Number of cases |
| 2018 | US - multistate | Ground turkey | 7 |
2007 | US - New Jersey | Probably exposure to poultry from live bird-market | 5 |
2007 | US - Massachusetts | Probably exposure to poultry from live bird-market | 62 |
2007 | US - multistate | Pet dry food | 79 |
1996 | US - Oregon | Person-person | 11 |
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