Streptococcus canis was first isolated from a dog, but the dog Fia in this picture has no connection with S. canis.
Streptococcus canis was originally isolated from dogs (in 1986) and it causes opportunistic infections in dogs and cats. S. canis can also cause mastitis in cows. Such cases are not common, but regularly found in Sweden according to Maria Nilsson-Öst and Charlotta Fasth at SVA. Images of S. canis will soon be included on the appropriate bacterial page in VetBact.
S. canis has also been isolated from humans with bacteremia and wound infections.