Hello. A streptococcus and lamblia were found in the child's analysis.…

Hello. A streptococcus and lamblia were found in the child's analysis. The dermatologist prescribed cefazolin antibiotic twice a day, 500 mg each (total 1000 mg per day) for 5 days. The child is one year old. Is this much? The doctor says it's normal, but previously due to other doctors, the condition was worse.