Môi trường vi sinh MSE AGAR (Mayeux, Sandine & Elliker) Lactic bacteria Môi trường vi sinh MSE AGAR (Mayeux, Sandine & Elliker) This medium, developed by Mayeux, Sandine and Elliker in 1962, is an elective medium for the detection and enumeration of Leuconostoc in milk, dairy products and sweet foods.