Corynebacterium groups rod-shaped bacteria that stain Gram-positive and grow with or without oxygen, living in soil and on plants. The genus spans spoilage organisms of vegetables and meats and industrial workhorses: Corynebacterium glutamicum ferments sugars into glutamic acid and the essential amino acid lysine at massive commercial scale, while relatives help ferment African staples such as gari. Molecular identification separates the useful strains from harmful cousins, a routine but vital task in both fermentation plants and food-safety labs. Distinguishing industrial strains from spoilage or pathogenic relatives by molecular methods is essential for both food safety and process reliability.