Hello and welcome to Healthcare Magic. Thanks for your query. Passing stools immediately after meals could be indicative of a parasitic infection. Certain parasitic infections are more common in people with HIV. Treatment is with appropriate antibiotics, after confirming the diagnosis by a stool examination or culture. You have mentioned that a stool culture & sensitivity test has been done already and iv antibiotics have been started. It may take a few days for the infection to clear completely, and so you ll have to be patient. In the meantime please ensure that she takes adequate fluids and a bland diet. If she is having multiple episodes of loose stools, then she can take Oral Rehydration solution (ORS), to prevent dehydration and replenish the water and salt loss. Best wishes, Dr. Sheeba Stephen