Using a sample of water taken at the source take a sterile 1 mL syringe and add 1 mL of water to each of the two compact dry plates. Filter 100 mL of water through a sterile filter paper and place this in one of the Compact Dry plates. Close and label both S-XXX-YY, where XXX is the cluster number and YY is the household number.
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.