Actinobacillus suis
![](/Images/godic/202412/20/Actinobacillus_suis4240.jpg")
![Actinobacillus suis colonies on the blood agar.](/Images/godic/202412/20/Actinobacillus_suis_colonies4241.jpg")
Actinobacillus suis is a beta-haemolytic, Gram-negative bacterium of the Pasteurellaceae family.
The bacterium has many strains and is the pathogen responsible for Actinobacillosis in pigs of all ages. It can also infect wild birds, domestic ruminants, dogs, cats and horses.