Probiotic Leuconostoc mesenteroides ssp. cremoris and Streptococcus thermophilus induce IL and IFN-γ production. Riina A Kekkonen. Leuconostoc mesenteroides (Tsenkovskii) van Tieghem , Leuconostoc dextranicum (Beijerinck) Hucker and Pederson , and Leuconostoc cremoris. the species L. mesenteroides, Leuconostoc mesenteroides subsp. suionicum subsp. nov., with the type strain mesenteroides subsp. cremoris (Garvie, ).

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Colonies may be slimy, smooth, round, and grayish in nature. Broth cultures often have uniform turbidity but strains forming long chains tend to sediment.

They require nutritionally rich media including complex growth factors and amino acids. They are fermentative and respiratory. Glucose is fermented mainly to lactic acid, ethanol and CO 2.

Unlike other gram-positive bacilli, Leuconostoc spp.

Leuconostoc are found on plants and to a lesser extent in milk and milk products. Dextran-forming species occur on sugar cane and sugar beet where they may cause widespread spoilage. Non-pathogenic to plants and animals, but Leuconostoc citreum and Leuconostoc pseudomesenteroides have been isolated from human sources.


Wide spread spoilage of sugar cane and sugar beet plants has been noted, where dextran-forming species of Leuconostoc occur. Bergey’s Manual of Determinative Bacteriology9th ed.

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Bergey’s Manual of Systemic BacteriologyVol. The Oxoid Vade-Mecum of Microbiology.

Manual of Clinical Microbiology6th ed. American Society for Microbiology, Washington, D.

Stedman’s Medical Dictionary25th ed. Color Atlas and Textbook of Diagnostic Microbiology5th ed. Spherical, but often lenticular coccoid cells ,esenteroides pairs and chains. Sometimes short rods with rounded ends in long chains.

Leuconostoc – bacterial genus – microbiology dictionary

Media containing crystal violet or thallium acetate. Tomato Juice Agar stabs, Litmus Milk with 0.

Anaerobic; requires fermentable carbohydrate for growth.