Advancing towards the elimination of trachoma as a cause of blindness in two cities in Sao Paulo State, Southeastern Brazil.

The World Health Organization recommends conducting prevalence surveys to validate the elimination of trachoma as a public health problem by the year 2030. The recommendation specifies that the surveys should be directed to previous endemic poor rural areas. Brazil is an endemic country for trachoma and has experienced a large internal migration from the rural areas to the outskirts of the major cities. This study aimed to determine the prevalence of trachoma in children aged 1 to 9 years old in two of the poorest municipalities on the outskirts of Sao Paulo to test the hypothesis of whether internal migration brought trachoma with it. A household survey was conducted between 2013 and 2014. The field teams went door-to-door to collect data on households with children of the selected age group and their members. The trachoma prevalence in this group was 1.5% (79/5,393). In the 10 to 19 years old group, the trachoma prevalence was significantly higher among girls 3.2% (47/1,448) than among boys 1.5% (20/1,361). This result adds evidence to the elimination of trachoma as a public health problem and will be included in the supporting material to validate its elimination in Brazil.