[Primary renal actinomycosis].

A case of renal actinomycosis, treated by nephrectomy, in a 41 year-old male, is reported. The clinical diagnosis, to which urography and renal arteriography lent support, was renal anthrax. The pus being sterile on conventional seeding, the investigations were directed towards the finding of characteristic mycelium. Five months after nephrectomy a cerebral abscess developed and the patient died. Although in the cerebral pus only B. proteus and coagulase-positive staphylococci were found, the actinomycotic etiology cannot be excluded since the specific granules were not looked for.