Mycoplasmatales Virus-laidlawii 2, a New Virus Isolated from Acholeplasma laidlawii

Recent reports (Gourlay, 1970; Gourlay, Bruce & Garwes, 1971) described the first isolation and gave some characteristics of a virus which infects a member of the order Mycoplasmatales, namely Acholeplasma laidlawii (formerly Mycoplasma laidlawii). This virus, designated Mycoplasmatales virus-laidlawii 1 (MV-L1), was shown to be bacilliform with a mean width of 14·6 nm. and a mean length of 89·8 nm. It was insensitive to ether and detergent and withstood a temperature of 60° for 30 min.; its nucleic acid appeared to be DNA. This report describes the isolation of another virus which infects A. laidlawii and which differs from MV-L 1.