That means that in a population where malaria has gone down all the way, and there's few people remaining with parasites, that the dogs can find these people, we can treat them with anti-malarial drugs, and give the final blow to malaria.
つまり マラリアの伝染が下火になったら 犬を使って 寄生虫を持つ人を探し出し 犬を使って 寄生虫を持つ人を探し出し 抗マラリア薬を投与して とどめを刺すことができるのです