👉 Macronematinae are a group of bacteria that primarily inhabit the gut microbiota but can also be found in other parts of the body, such as the mouth and respiratory tract. They have a unique cell wall made up of cellulose, which is similar to that of plant cells but more resistant to mechanical stress. Macronematinae play an important role in digestion by breaking down complex carbohydrates into simpler sugars, helping to regulate blood sugar levels in the body.