At the beginning of the 5th week of CD or HSD supplementation, the mice were provided with drinking water containing an antibiotic cocktail (ampicillin, 1 g/L; neomycin sulfate, 1 g/L; metronidazole, 1 g/L; and vancomycin, 500 mg/L; Sangon Biotech (Shanghai) Co., Ltd.) for 4 weeks ad libitum in the meantime (27 (link)). The antibiotics were renewed every other day. After 4 weeks of antibiotic treatment, the mice were treated with zymosan A, and the peritoneal fluid was collected for further experiments.
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