Background: Salmonella Schwarzengrund 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 were was found to be transmitted from chickens to persons to people in some countries in Asia (Thailand), and from imported Thai food products to persons not only in Denmark, but also in the United States.
Animal reservoir: Poultry is the main reservoir of S. Schwarzengrund
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Outbreaks: Outbreaks associated with S. Schwarzengrund have been reported in the US; in addition, in Denmark cases have been linked to thai 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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