this is the first report of actinomyces europaeus bacteraemia in a 53-year - old man . 
 the bacteraemia was the result of a breast abscess . 
 identification was established by matrix - assisted desorption ionization 
 time of flight mass spectrometry and confirmed by 16s rrna gene sequencing . 
 the patient was treated with surgical drainage and penicillin for 4 weeks ; the patient did not experience any relapse during 6 months of follow - up .