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Micrographs in the top row represent T4 and three previously characterized pseudoT-even phages (RB49, 44RR, and RB43) stained with phosphotungstate (23). Below are four additional T4-type phages that were isolated on nonenterobacterial hosts. (1) B. cepacia pseudoT-even phage 42; (2) A. hydrophila schizoT-even phage Aeh1; (3) V. natriegens schizoT-even phage nt-1; and (4) A. salmonicida schizoT-even phage 65. Magnification, about 150,000.
