English: Immune serum promotes adherence of BMMac to L4 larvae in vitro. Larvae recovered from the small intestine of challenge-infected mice were incubated with BMMac in the presence of or absence of immune serum for 24 h. Suspensions from co-cultures were transferred to glass slides, carefully covered with cover slips and time lapse-movies were immediately recorded with an Olympus AX70 microscope. Movies were processed using iMovie software. Representative examples are shown.