Fig. 1From: Ultrastructure and localization of Neorickettsia in adult digenean trematodes provides novel insights into helminth-endobacteria interactionSingle Neorickettsia endobacteria in adult, HPF/FS fixed P. elegans. a Coccoid endobacterium with characteristic double membranes (arrowheads). b Endobacterium with intracytoplasmatic membrane invagination (arrowhead). c Endobacterium with large halo, dark cytoplasm and electron-denser nucleoid (arrow). d Bacilloid endobacterium with membrane invagination (arrowhead), a small, dark nucleoid (arrow) and many free ribosomes (asterisks). e Endobacterium with tubular or vesicular structures (arrowheads) in close proximity. f Typical, electron-dense, double membrane (arrowheads) of Neorickettsia endobacteria. Scale-bars: 100 nmBack to article page