Viability of Ascaris lumbricoides Eggs ‘Preserved’ in Formalin

Abstract

IN March 1950, a faecal specimen was collected from a patient in the Brisbane General Hospital, who was infected with Ascaris lumbricoides. This was preserved by the addition of hot 10 per cent formalin. The material was used afterwards in May and August to teach the Willis salt flotation method for demonstrating helminth infection. Nothing unusual was noted.