How many samples do I need to detect at least one positive?

How many samples do I need to detect at least one positive?

Choose input values and find the suitable number of samples according to the expected p-value:

Known prevalence:

Minimum number of sample to test:

Maximum number of sample to test:

Step:

Note: This test is based on the Poisson distribution (ppois in R).

This application was developed at IRD - UMR Espace-Dev