Comments |
P.127 bottom paragraph:"Up until then (summer of 1944), every investigator had a private collection of phages and host bacteria, making comparisons between laboratories difficult. Delbrük insisted that researchers concentrate on a set of seven phages active against the same host, Escherichia coli strain B (Table 6.1)(Fig. 6.4). The set of phages, called T1, T2, T3, T4, T5, T6, and T7 (T for “type”), were distinguished serologically and by the use of host strains resistant to each phage (primary sources)." See note beneath table |