H. Marti et Jc. Koella, MULTIPLE STOOL EXAMINATIONS FOR OVA AND PARASITES AND RATE OF FALSE-NEGATIVE RESULTS, Journal of clinical microbiology, 31(11), 1993, pp. 3044-3045
A mathematical model that shows the relationship between the number of
stool examinations for ova and parasites and the rate of false-negati
ve results is described. An analysis of 1,869 patients with three stoo
l examinations revealed various sensitivities for different parasites.