MUC2 and hydrops fetalis: As with the healthy and CD HF-MUC2-derived glycans (Fig. 6), we found that B. theta-GFP grew in all media that was supplemented with carbohydrates; however, unlike glucose and healthy HF-MUC2 O-glycans, growth in UC MUC2 O-glycans began to decline after 6 h but ultimately stabilized (Fig. S8C).