Electron Microscopy Causative agent: Campylobacter jejuni Category: Bacteria Kingdom: Bacteria Phyllum: Proteobacteria Class: Epsilon Proteobacteria Order: Campylobacteriales Family: Campylobacteraciae Genus: Campylobacter Species: jejuni : Classified as Category B Bioterrorism Agent due to its ability to cause food-borne and water-borne outbreaks. Disease: Campylobacteriosis. According to the CDC, C. jejuni is the leading cause of bacterial diarrheal illness in the U.S., affecting ~2.4 million people annually, causes between 5-14% of all diarrheal illnesses worldwide, primarily affects children <5 years old and young adults (15-29 years old). Few people die from the disease. (AKA Campylobacter enteritis or gastroenteritis.) Transmission electron micrographs of Campylobacter jejuni, negatively stained to enhance contrast. gram negative, slender, curved, motile rod with flagella, resembling small tightly coiled spirals. Microaerophilic, fragile, sensitive to environmental stresses, O2, drying, heating, disinfectants, acidic conditions. Requires 3%-5% O2, 2%-
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