Additional File 6.

Transverse scan left normal testis. The same worm nest as seen in movie 2A. The caliper is positioned where the worm nest is located. The following Pulse Wave Doppler-mode confirms the fact that this worm nest is smaller than the one in movie 1A-C as documented by lower peaks, again characterized by the irregular undulating band in contrast to pulsating amplitudes caused by arteries.

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Mand et al. Filaria Journal 2003 2:3   doi:10.1186/1475-2883-2-3