Cover photograph (Copyright © 2004, American Society for Microbiology. All Rights Reserved.): Tomato spotted with virus (blue) in a larval thrips midgut. Actin labeling (red) reveals the muscle surrounding the insect midgut and the epithelial cells that constitute the gut. The three-dimensional reconstruction of the insect gut was generated by laser scanning confocal microscopy. (See related article on page 13197.)