A New Bacteriophage Pseudomonas Phage Ka1 from a Tributary Stream of Lake Baikal

The bacteriophage Pseudomonas phage Ka1 was isolated from the water of a tributary stream of Lake Baikal, in the area of discharge of treated wastewater of the city of Slyudyanka. The bacteriophage genome contains 46 092 bp and has a 50% G+C pairs (AN OP455935.1). It exhibits 91% identity with the Pseudomonas phage PSA37 genome, belonging to Bruynoghevirus from the class Caudoviricetes suggesting that Ka1 is a new representative of Luz24-like phages (Bruynoghevirus). The bacteriophage lyzes 62% of P. aeruginosa clinical isolates and increases the efficiency of gentamicin, ciprofloxacin, imipenem and meropenem by 4–8-fold against these bacteria. Integrases, transposases and recombinases have not been identified in the genome of the bacteriophage Pseudomonas phage Ka1; which allows using it in the complex therapy of infections caused by P. aeruginosa.