In a research from 1993 to 1995, Ecuador increased its use of DDT and achieved a 61% reduction in malaria rates, while each of the other countries that gradually decreased its DDT use had large increases.
Nunha investigación feita desde 1993 a 1995, constatouse que Ecuador incrementou o uso do DDT e conseguiu un 61% de redución nas taxas de malaria, mentres que os outros países que diminuíron paulatinamente o uso do DDT experimentaron un gran incremento.