Commonly employed diagnostic methods for Fasciola spp., such as a traditional sedimentation and faecal egg count, or a commercially available coprological ELISA, have limitations in their sensitivity or ability to differentiate species. A reliable DNA isolation method coupled with real-time PCR addresses these issues by providing highly sensitive and quantitative molecular diagnosis from faecal samples. The current study evaluated a standard benchtop vortex for F. hepatica egg disruption in sheep and cattle faecal samples and determined the minimum faecal egg load required for a positive result from un-concentrated (raw) faecal samples. The minimum faecal egg load for a positive real-time PCR result from 150 mg raw faecal sample was 10 and 20 eggs per gram for sheep and cattle, respectively. No significant difference (P = 0.4467) between disruptions on a benchtop vortex for 5 or 10 min was observed when compared to 40 s of disruption at 6.0 m/s in a benchtop homogeniser.
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