Bacteria in the genus Campylobacter
are slender Gram-negative vibroid cells, possessing one or more helical
turns. Campylobacter fetus are shown here at
1000 X magnification, stained with the Gram stain. They appear as tiny red
comma-shaped organisms. Sometimes two Campylobacter
appear in a "V" pattern resembling seagull wings. Pathogenic
species in the genus Campylobacter include
C. fetus , which causes spontaneous abortion
in domestic animals, and C. jejuni , a cause
of foodborne intestinal disease. It is not possible to distinguish different
genera of Campylobacter from one another by
a Gram stain. Biochemical tests must be run for complete identification.
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