This report describes two cases of Osler's triad of pneumonia, meningitis, and 
endocarditis, as a result of Streptococcus pneumoniae infection, also called 
Austrian's syndrome. In the first patient, a 51 year old non-alcoholic man, the 
aortic valve was affected and needed to be replaced in an emergency operation. 
The mitral valve was affected in a 70 year old woman without underlying disease, 
who only benefited from medical treatment. Both patients received 
corticosteroids, either dexamethasone followed by low doses of hydrocortisone 
and fludrocortisone, or only hydrocortisone and fludrocortisone, at the onset of 
the illness, and their outcome was favourable. These case reports focus on the 
presentation, prognosis, and therapeutic options for this severe syndrome.