alicyclobacillus pomorum alicyclobacillus pomorum alicyclobacillus pomorum is a species of gram positive, strictly aerobic, bacterium. the bacteria are acidophilic and produced endospores. it was first isolated from spoiled mixed fruit juice (containing fresh orange, apple, mango, pineapple, and raspberry juice). the species was first described in 2003, and the name is derived from latin pomorum (of fruits). alicyclobacillus pomorum scientific classification domain: bacteria phylum: bacillota class: bacilli order: bacillales family: alicyclobacillaceae genus: alicyclobacillus species: a. pomorum binomial name alicyclobacillus pomorumgoto et al. 2003 the optimum growth temperature for a. pomorum is 45-50 °c, and can grow in the 30-60 °c range. the optimum ph is 4.5-5.0, and can grow in ph 3.0-6.0.