沙门 transliterates 'Salmon-' - but the genus is named for the American veterinary scientist Daniel Elmer Salmon (1850-1914), not the fish.
氏 ('clan/family') marks it as a person-derived name, and
菌 ('bacterium') is the genus suffix; many bacterial genera follow the same pattern, e.g.
大肠杆菌 (E. coli).
