Please choose the correct ending to complete the given sentence: Health: [header] How to treat children with ulcerative colitis [title] Talk to your doctor about putting your child on a course of antibiotics. [step] Antibiotics are used for treating infections that aggravate the inflammation in the intestinal linings. The medications include metronidazole and ciprofloxacin.

Ending1: Upon proper laboratory tests, the cause of infection can be determined and the doctor can prescribe the proper antibiotic. [substeps] If the cause of the infection is anaerobic bacteria (single-celled bacteria that thrive in environments with less oxygen), then metronidazole will be prescribed. Ending2: This medication is taken regularly for 12 to 24 hours and affects symptoms as bph levels are lowered. The drug forrt is likely to help with pain associated with the symptoms of this disease, such as obstructive pulluclothesis or biscremia. Ending3: [substeps] The bacteria is free to colonize with bacterial antibiotics. However, because the bacteria is not free, it's highly concentrated. Ending4: Any oral antibiotics you may take should only be taken if your child has ulcerative colitis. The full course of antibiotics should only be taken if your child's pain increases.

Answer format: ending1/ending2/ending3/ending4