the pathogenesis still remains unclear but some data argue for an infectious mechanism : frequency of tick bites ( 20 p. 10 ) , geographical occurrence in the spreading area of common ticks in europe , affinity of ticks for the breast in all mammals , carriage of viruses by some tick species , efficiency of penicillin in tick-transmitted viral infectious and in benign skin lymphocytomas , positive inoculations in volunteers , general course of an infectious disease ( seasonal variations , frequency of satellite lymph-node swelling , spontaneous healing ) .
C0042769
viral infectious
C0009450
infectious