Thanks to Android technology, the GTMP was able to survey more districts in three years than had been recorded in the previous 12 years. The data collected enables ministries of health to focus their strategies to tackle trachoma using the WHO-approved SAFE strategy: surgery, antibiotics (through mass drug administration), face-washing and environmental improvements (such as sanitation).
During the project, more than 550 teams of trained surveyors, including ophthalmic nurses, visited millions of people in sample households in the most remote locations in 29 countries, including Chad, Eritrea, Pakistan, Papua New Guinea, Solomon Islands, Colombia and Yemen.
Dr Bilghis, who led the GTMP team in Sudan, spent three years travelling to some of the most remote areas to carry out eye examinations.
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Neema lives in Tanzania. She learned how to stop the spread of trachoma by washing her face and ensuring she practised good hygiene at home.
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Issa, aged 82, spent years trying to find out what was wrong with his eyes, until a team from the GTMP examined him and referred him for treatment.
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The mapping of trachoma and the legacy of the Global Trachoma Mapping Project lives on in the World Health Organization-led Tropical Data initiative, which was launched in July 2016.
Tropical Data uses the same approach and methodology as the GTMP, enabling organisations to plan, collect and analyse data about trachoma. So far, 300 surveys in 23 countries have already taken place, and more than a million people across four continents have been examined.