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Comparison between the Midi Parasep and Midi Parasep Solvent Free (SF) faecal parasite concentrators
Agatha C Saez1, Monika M Manser, Nick Andrews
1Department of Clinical Parasitology, UKNEQAS Parasitology, Hospital for Tropical Diseases, London, UK.
Aim:
To compare the recovery of parasites in faecal samples using the Midi Parasep with ethyl acetate and Midi Parasep Solvent Free (SF) faecal parasite concentrators.
Methods:
23 preserved and 11 fresh faecal samples were microscopically examined for the presence of parasites using the Midi Parasep concentrator with ethyl acetate centrifuged for 1 and 3 min and the Midi Parasep SF concentrator.
Results:
The Midi Parasep SF faecal parasite system recovered significantly fewer ova and cysts and resulted in a notably larger deposit than the Midi Parasep concentrator with ethyl acetate.
Conclusions:
Parasites present in small numbers that would be detected using the Midi Parasep concentrator with ethyl acetate could be missed using the SF faecal parasite system.
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