Streptobacillus felis is a fastidious microorganism and a novel member of the potentially zoonotic bacteria causing rat bite fever. Since its description, this is the second isolation of S. felis in a diseased member of the Felidae . Interestingly, the strain from this study was isolated from a zoo held, rusty-spotted cat ( Prionailurus rubiginosus ), with pneumonia, thereby indicating a possible broader host range in feline s...