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Gel electrophoresis of PCR products of P. larvae subsp. larvae amplified with different primer pairs. Lanes: 1, AF 1 plus AF 2; 2, AF 1 plus AF 3; 3, AF 4 plus AF 5; 4, AF 6 plus AF 7; 5, AF 8 plus AF 9; 6, AF 10 plus AF 11; 7, Paeni 30 plus Paeni 253; 8, PBL 8 plus PBL 350; 9, PL 1 plus PL 2; M, molecular size marker (100-bp ladder).
