Changes

**Small colonies surrounded by clear haemolysis

**Small colonies surrounded by clear haemolysis

**No growth on MacConkey agar

**No growth on MacConkey agar

**Positive CAMP reaction with ''Staphylococcus aureus''

**Positive CAMP reaction with [[Staphylococcus spp.|''Staphylococcus aureus'']]

**The bacteria on the palatine tonsil may remain undetected by serological tests and swabbing, and can therefore cause an outbreak in naive pigs

**The bacteria on the palatine tonsil may remain undetected by serological tests and swabbing, and can therefore cause an outbreak in naive pigs

**Killed and bacterin vaccines are available   

**Killed and bacterin vaccines are available