A malaria finding has a colonial setting

The observation preceded the first famous hand radiographs and later clinical use of X-rays.

Once developed, the new radiation allowed physicians to see bones inside the living body without surgery.

While working in British-ruled India, he observed pigmented structures in the dissected mosquito.

The discovery helped establish the role of mosquitoes in malaria transmission; the full life cycle was clarified through later work.

The date later became World Mosquito Day, commemorating a result reached in India rather than Britain.

In Lassance, he found the parasite now called Trypanosoma cruzi in the blood of two-year-old Berenice.

The young patient was the first documented human case of the disease later named after Chagas.

Chagas connected a parasitic organism, an insect vector and a human case in his research.

The 14 April diagnosis preceded later research into the diverse long-term effects of Chagas disease.

The fourteen-year-old patient was given a first pancreatic extract injection in Toronto.