Population studies on Oncomelania quadrasi, the snail intermediate host of Schistosoma japonicum, in the Philippines. 2. Necessary sample size for snail density survey.

@article{Makiya1981PopulationSO,
  title={Population studies on Oncomelania quadrasi, the snail intermediate host of Schistosoma japonicum, in the Philippines. 2. Necessary sample size for snail density survey.},
  author={K Makiya and Hiroshi Tanaka and E A Ba{\~n}ez and Bayani L. Blas and Nobuo Kumada and Alze P. Santos},
  journal={The Japanese journal of experimental medicine},
  year={1981},
  volume={51 6},
  pages={331-4}
}
In order to save time and manpower for the density surveys of Oncomelania quadrasi, the snail host of Schistosoma japonicum in the Philippines, the minimal necessary sample size (q) was determined using a formula, q greater than t2/E2(1d - 1 + 1/-x). This formula is based on the Id dispersion index [2, 3] which varies with the degree of clumping of unevenly… CONTINUE READING