It seems that your child has cured from her initial infection and now developed post-antibiotic diarrhea or temporary lactose intolerance
Let me explain the fact. Our gut is full of good bacteria. These bacteria help in digesting food . Antibiotics kills the bad bacteria (that cause the infection) and also good bacteria (in gut). Therefore, after a course of antibiotic, the gut bacteria are eliminated. It results in temporary food intolerance
(lactose)., causing loose stool / diarrhea.
The green colour of stool may be due to unabsorbed iron in formula (if your baby is formula fed).
Antibiotic associated diarrhea is usually not severe and subsides spontaneously after few days (after gut bacteria are replenished). However, Probiotic medicine (bacteria spores) can be used to replenish gut bacteria if necessary.
Please visit your pediatrician
if loose motion
is not subsided after 7 -10 days of antibiotics completion, loose motion increases, blood in stool
, child gets dehydrated or drowsy, poor feeding, urine not passed for >12 hrs or you feel something wrong with the child.
Post if you have more queries.