Salmonella phage akira, infecting selected Salmonella enterica Enteritidis and Typhimurium strains, represents a new lineage of bacteriophages.

Some serovars of Salmonella can cause life-threatening diarrhoeal diseases and bacteriemia. The emergence of multidrug-resistant strains has led to a need for alternative treatments such as phage therapy, which requires available, well-described, diverse, and suitable phages. Phage akira was found to lyse 19 out of 32 Salmonella enterica serovars and farm isolates tested, although plaque formation was observed with only two S. Enteritidis and one S. Typhimurium strain. Phage akira encodes anti-defence genes against type 1 R-M systems, is distinct (<65% nucleotide sequence identity) from related phages and has siphovirus morphology. We propose that akira represents a new genus in the class Caudoviricetes.