Journal
MICROBIOLOGICAL RESEARCH
Volume 263, Issue -, Pages -Publisher
ELSEVIER GMBH
DOI: 10.1016/j.micres.2022.127160
Keywords
Coagulase-negative staphylococci; Technological properties; Safety aspects; Volatile profiles; Starter cultures
Categories
Funding
- Sichuan Science and Technology Program [2022NSFSC0118]
- Fundamental Research Funds from Central Universities, Southwest Minzu University [2020NYB29]
- China Scholarship Council [202008510086]
- Solid-state Fermentation Resource Utilization Key Laboratory of Sichuan Province [2021GTJC06]
- McGill University
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The technological, safety-related and volatile properties of coagulase-negative staphylococci (CNS) isolates from Chinese spontaneously fermented meat products were analyzed. Several CNS isolates have the potential to be used as starter cultures for fermented meat products.
Technological, safety-related and volatile properties were analyzed in coagulase-negative staphylococci (CNS) isolates from Chinese spontaneously fermented meat products. A total of 107 CNS isolates were identified via 16 S rRNA sequencing, and the most recovered species were S. saprophyticus (53.3 %), S. edaphicus (12.1 %), and S. epidermidis (10.3 %). Among them, 58 CNS isolates belonging to 9 species were selected with higher activities of catalase, nitrate reductase, proteolysis, and lipolysis, as well as higher tolerance to stressful environmental conditions. Then, 7 CNS isolates belonging to 4 species were further selected based upon excellent technological characteristics, lack of hemolysis and antibiotic resistance, and a low production of biogenic amines. The volatile profiles of these 7 strains cultivated in pork broth was determined. S. casei No. 1 produced significant amounts of phenethyl alcohol, geraniol, and 3-methyl-butanol. S. xylosus No. 120 produced the highest amount of methyl ketones with the potential to provide dry-cured odor of fermented meats. The volatile profile was highly strain dependent. Several CNS identified in this study have the potential to be used as the starter cultures for fermented meat products.
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