Comparative evaluation of Midi Parasep® Solvent Free and the Ritchie concentration technique for helminth and protozoa visualisation in clinical stool samples

The choice of concentration technique should be guided by the clinical context. Midi Parasep^® SF is efficient for protozoa and suitable for routine use in high-throughput settings. Conversely, the Ritchie method is preferable when helminth infection is highly suspected, particularly in migrant or travel medicine populations. Moreover, other diagnostic techniques, such as serological assays, could contribute to a more accurate diagnosis, thereby guiding the selection of the most appropriate concentration technique.