Smith found that dead virus can induce immunity against the living virulent virus. Although Smith made the discovery on his own, his supervisor, D.E. Salmon, usurped credit. See Bibel, Milestones in immunology (1988) 31-32.

Discovery of Salmonella choleraesuis. The Salmonellae tribe was named after Salmon, even though the discovery was made by Smith. See Bibel, Milestones in immunology (1988) 31-32.

First report on the discovery of a Babesia, cause of Babesiosis. Smith first observed the microscopic organism in the summer of 1886, but mentioned Babes's work in this paper, perhaps resulting in Babes being credited with the discovery.

(Thanks to Juan Weiss for this reference and its interpretation.)

U.S. Bureau of Animal Industry, Bulletin No. 1. Discovery of the parasite of Texas cattle fever, Pyrosoma bigeminum, and proof that its transmission is due to the cattle tick, Boöphilus bovis. This was the first demonstration of arthropod transmission of disease. Pyrosoma bigeminum is now known as Babesia bigemina, and Boöphilus bovis as B. annulatus.

First clear differentiation between the bovine and human types of tubercle bacillus.