alicyclobacillus dauci alicyclobacillus dauci alicyclobacillus dauci is a species of gram positive, strictly aerobic, bacterium. the bacteria are acidophilic and produced endospores. it was first isolated from spoiled mixed vegetable and fruit juice. the species was first described in 2015, and the name is derived from the latin dauci (of the carrot). alicyclobacillus dauci scientific classification domain: bacteria phylum: bacillota class: bacilli order: bacillales family: alicyclobacillaceae genus: alicyclobacillus species: a. dauci binomial name alicyclobacillus daucinakano et al. 2015 the optimum growth temperature for a. dauci is 40 °c, and can grow in the 20-50 °c range. the optimum ph is 4.0, and can grow in ph 3.0-6.0.