The Kato-Katz method is a widely used tool to monitor and assess the prevalence and geographical distribution of soil-transmitted helminths and Sch...

The Kato-Katz method is a widely used tool to monitor and assess the prevalence and geographical distribution of soil-transmitted helminths and Schistosoma mansoni infections. Indicate the limitations of the method. Incorrect answer. A. The methodology is considered simple and can be easily reproduced on a large scale. The method has weak sensitivity to detect mild infections, and there is substantial variation in readings (resulting from daily fluctuations in egg excretion, uneven distribution of eggs in a single stool sample, and variation in technicians' capacity). You got it right! B. The method has weak sensitivity to detect mild infections, and there is substantial variation in readings (resulting from daily fluctuations in egg excretion, uneven distribution of eggs in a single stool sample, and variation in technicians' capacity). The method has low sensitivity to detect mild infections, and there is substantial variation in readings (resulting from daily fluctuations in egg excretion, uneven distribution of eggs in a single stool sample, and variation in technicians' capacity). Incorrect answer. C. The method can be taught to laboratory microscopists with relative complexity. The method can be taught to laboratory microscopists with relative ease.


a) The methodology is considered simple and can be easily reproduced on a large scale. The method has weak sensitivity to detect mild infections, and there is substantial variation in readings (resulting from daily fluctuations in egg excretion, uneven distribution of eggs in a single stool sample, and variation in technicians' capacity).
b) The method has weak sensitivity to detect mild infections, and there is substantial variation in readings (resulting from daily fluctuations in egg excretion, uneven distribution of eggs in a single stool sample, and variation in technicians' capacity).
c) The method can be taught to laboratory microscopists with relative ease.