31. This species is an obligate anaerobe and is found in the rumen of cows. 32. An important distinction needs to be made here between the obligate anaerobes and the microaerophiles. 33. Microaerophiles, like the obligate anaerobes , are damaged by normal atmospheric concentrations of oxygen. 34. It shows consistent growth throughout nutrient broth which is consistent with being an aerotolerant anaerobe . 35. It is a facultative anaerobe , it can therefore use alcoholic respiration in aerobic conditions. 36. "Victavallis vadensis " is a facultative anaerobe , like most gut microbes. 37. Chlorhexidine is active against Gram-negative organisms, facultative anaerobes , aerobes, and yeasts. 38. There are organisms that can adjust their metabolism to their environment, such as facultative anaerobes . 39. There are three categories of anaerobes . 40. Many facultative anaerobes use denitrification because nitrate, like oxygen, has a high reduction potential.