alicyclobacillus shizuokensis alicyclobacillus shizuokensis alicyclobacillus shizuokensis is a species of gram positive, strictly aerobic, bacterium. the bacteria are acidophilic and produce endospores. it was first isolated from soil in a crop field in shizuoka, japan. the species was first described in 2007, and the name refers to the city from which it was first isolated. alicyclobacillus shizuokensis scientific classification domain: bacteria phylum: bacillota class: bacilli order: bacillales family: alicyclobacillaceae genus: alicyclobacillus species: a. shizuokensis binomial name alicyclobacillus shizuokensisgoto et al. 2007 the optimum growth temperature for a. shizuokensis is 45-50 °c, and can grow in the 35-60 °c range. the optimum ph is 4.0-4.5, and cannot grow at ph 3.0 or ph 6.5. a. shizuokensis was found during a japanese survey of various beverages and environments, which also discovered 5 other species of alicyclobacillus: a. contaminans, a. fastidiosus, a. kakegawensis, a. macrosporangiidus, and a. sacchari.