Malariometric surveys are conducted in populations/communities, to measure the number of parasite carriers. This is needed to assess the impact of malaria control programme and detect areas of higher transmission or epidemics. The community is visited several times prior to the survey to inform the population and explain the purpose of the survey and the method used. If the community to be surveyed is small (<400 people) everyone is screened for malaria (exhaustive survey) and all positive cases treated the same day. When microscopy is used to diagnose malaria during a survey, the task is very time consuming and tedious. The survey team must be large and include several technicians and their equipment. Since rapid tests are available at low cost, malariometric surveys have become much more simple and quick to perform. 400 to 500 people can be screened in a few hours depending on the organisation of the survey and in particular on the proper information being given to the villagers and their leaders.