上游充通大睾 Shanghai Jiao Tong University Figure 5.19 A fermentation test.( (a)An uninoculated fermentation tube containing the carbohydrate mannitol. (b)Staphylococus epidermidis grew on the protein but did not use the carbohydrate.This organism is described as mannitol-.(c) Staphylococus aureus produced acid but not gas.This species is mannitol+(d)Escherichia coli is also mannitol+and produced acid and gas from mannitol. What is the importance of biochemical testing?Shanghai Jiao Tong University