“…Furthermore, an identical clinical picture of acute non-specific pericarditis can be seen following other infections such as Reiter's disease (Csonka & Oates, 1957), infectious mononucleosis (Gardner, 1959) and lymphogranuloma venereum (Sheldon et al, 1948). Likewise in pericarditis following heart operations (Engle & Ito, 1961); following myocardial infarction (Dressler, 1959a); gunshot wounds to the heart (Wood, 1956); following traumatic haemopericardium (Tabatznik & Isaacs, 1961); as a result of drug therapy (Costa, Holland & Pickren, 1961;Shafar, 1965) and with penicillin hypersensitivity (Schoenwetter & Silber, 1965), the clinical features are the same. This suggests that an autoimmunity reaction rather than direct causation by all the various agents may be responsible.…”