94.2% of caregivers knew that the antibiotic use needed a doctor prescription; only 11.7% of caregivers knew that the antibiotics couldnt be used in the diseases caused by virus; 34% of patients took the full course of antibiotics although the symptoms had improved; 5.8% of relatives understood that it was too difficult for the scientists to develop new antibiotic; 42.7% of relatives had correct general knowledge of antibiotics.