Rate of intra abdominal infections in both therapeutic strategies is the first endpoint to be compared. Duration of pain, diet, hospitalisation, absence from work will also be compared. In the group of patients treated by antibiotics, the rate of persistant and recurrent appendicitis after treatment will be evaluated. Recurrent appendicitis is not considered a complication as long as the recurrence of the appendicitis is uncomplicated. During the followup period of one year, long-term complications will be observed including: abdominal hernia, adhesive intestinal occlusion, and others.