English: In vivo motility of larvae in granuloma of antibody and FcRγ deficient versus wildtype mice. A piece of the upper duodenum of challenge Hp infected mice was removed at day 4 p.i. and carefully flattened between two glass slides for imaging with an Olympus AX70 microscope (10× objective). Movies of granulomas, containing clearly visible larvae were recorded over a time frame of 60 s (20 frames). Movies were processed using iMovie software. Representative examples are shown.