Cover photograph: Composite image of a scanning electron micrograph of Campylobacter jejuni on a 0.1-μm filter, a photograph of copper sulfate, and a photograph of C. jejuni on blood agar. (Micrograph courtesy of Valerie Lapham, North Carolina State University, Raleigh, NC; artwork by Elizabeth Poston, Portland, OR.) (See related article at e00208–18.) (Copyright © 2018 American Society for Microbiology. All Rights Reserved.)