Identification of Adsorption Inhibition, Restriction/Modification and Abortive Infection Type Phage Resistance Systems in Lactococcus lactis Strains
98 Lactococcus lactis strains were isolated from traditional fermented milk products in Turkey tested against 60 lactococcal lytic phages to determine their resistance levels. While 82 L. lactis strains were sensitive against lactic phages at different levels, 16 L. lactis strains showed resistance to all phages tested. Types of phage resistance among 16 L. lactis strains were identified as phage adsorption inhibition in eight strains, restriction/modification in six strains and abortive infection (heat sensitive phage resistance) in two strains, using three broad-spectrum phages Φpll 98-32, Φpld 67-42 and Φpld 67-44.
KeywordsL. lactis phage resistance adsorption restriction/modification abortive infection
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This research was supported by the Institute of Biotechnology, Ankara University, under the project entitled “Endüstriyel Açıdan Kullanışlı Lactococcus lactis Suşlarının Tanısıve Laktik Fajların İnaktivasyonu Üzerinde Araştırmalar”.
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