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Cellular Morphology
Campylobacter upsaliensis shares the characteristic appearance of other Campylobacter species: it is a curved to spiral, gram-negative rod and displays darting motility. The bacteria have been observed to have only one polar flagellum, or two single flagella with one at either end. The bacteria can range from 0.2μm to 0.5μm in width and 0.5μm to 8μm in length. When grown on blood agar the colonies appear smooth, well defined, and grey to translucent.