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Animal reservoir: Serovar Paratyphi B is almost almost exclusively host restricted to humans and closely related anthropoids. Serovar Paratyphi B var. Java has been found in dogs. 

Geographical distribution: Serovar Paratyphi B has been found in the United States, South America, Iraq, and U.K.

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1. https://www.oftlaw.com/current-outbreaks/october-2020-salmonella-paratyphi-b-outbreak/
2. https://www.foodsafetynews.com/tag/salmonella-paratyphi-b/
3. https://www.health.state.mn.us/news/pressrel/2020/salmonella100920.html
4. https://www.sciencedirect.com/topics/medicine-and-dentistry/salmonella-enterica-serovar-paratyphi-b
5. https://www.microbiologyresearch.org/content/journal/mgen/10.1099/mgen.0.000940
6. https://pubmed.ncbi.nlm.nih.gov/2514109/
7. https://doi.org/10.1111/zph.13174