title: Maintenance of infectivity of M. lepraemurium in vitro for sixteen years by means of lyophilization. Determination by bacteriologic and morphologic observation of the infecting bacilli.
mesh_terms: D000818:Animals; D001431:Bacteriological Techniques; D005612:Freeze Drying; D007918:Leprosy / Q000209:etiology; D051379:Mice; D009161:Mycobacterium / Q000166:cytology / Q000472:pathogenicity*; D051381:Rats; D012376:Rodent Diseases / Q000209:etiology / Q000382:microbiology; D013997:Time Factors