The biophysical properties of the surface of a range of nematode species and their developmental stages were examined in an attempt to understand the nature of the host-parasite interface. Fluorescent probes were used to label the nematode surface, and fluorescence recovery after photobleaching (FRAP) was used to measure the freedom of each probe to diffuse in the plane of the surface. These methods were applied to living, intact parasites, and the analysis confined to the outermost surface
