YSG Agar is recommended for the detection of Alicyclobacillus in fruit juices in accordance with Official method of IFU.recommended for the growth of Alicyclobacillus. Yeast extract in the medium supplies vitamin and growth factors. Glucose serves as an energy source. Soluble starch neutralizes the medium. The low pH of the medium imparts selectivity to the medium. This medium is recommended for the count of Alicyclobacillus in fruit juices.