Quick Kato smear for field quantification of Schistosoma mansoni eggs

The 50-mg Kato thick smear was modified by using stainless steel templates which deliver 20 mg of stools accurately; fecal material can thus be processed in the field and the smears cleared within 15 minutes. The counts obtained from the 20-mg quick Kato were proportional to those obtained by the 50-mg thick smear.