FIG. 7.

The ability of B. cenocepacia H111 to accumulate in the C. elegans intestine is dependent on AidA. Nematodes were fed on GFP-tagged derivatives of the B. cenocepacia wild-type strain H111 (a) or the aidA mutant H111-A (b). Worms were inspected with a confocal laser scanning microscope, and transmission images were merged with epifluorescence micrographs showing bacterial GFP fluorescence. The entire lumen of a nematode fed on GFP-tagged wild-type H111 was filled with green fluorescent cells (a). In contrast, only a few GFP-tagged cells were observed in the nematode gut when the aidA mutant H111-A (b) was used as a food source.