“…Nearly half a eentury ago, MEISSNER (1928) obseryed that sera of norrnaI animaIs exert some inhibitory effeet upon bacilIary multiplieation; she found even stnmger antimyeobacterial activity in sera of tubereulous animaIs. The bacteriostatie power of sera from eertain cases of tubereulosis has been report ed by KALLOS and NATHAN (1932), COURMONT and GARDERE (1933), PAGEL (1940), andEMMART andSEIBERT (1945). COURMONT and GARDERE (1937) observed that the prognosis in tubereulosis was more favorable when the tubereulocidal power of the patient's blood was elevated.…”