In 1903 he was appointed Bacteriologist to the Government of Ceylon at the Central laboratory in Colombo and continued research in mycology and bacteriology, describing several new species of intestinal bacilli. He invented the absorption test for the serological identification of closely allied organisms.
In 1903, he took on the role of Bacteriologist for the Government of Ceylon at the Central laboratory in Colombo. His research continued to focus on mycology and bacteriology, leading him to describe several new species of intestinal bacilli. He also developed a novel absorption test for identifying closely related organisms through serology.