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I have evaluated your query thoroughly .
* This is in relation with GI infection following ingestion of some food or
liquid same as your friend had taken .
* Recommendations for better recovery
- Drink plenty of liquids .
- Soft , light diet at intervals with fresh curd preferable .
- Avoid all oily , spicy , high caloric , junk foods ,
smoking , alcohol .
- Intake of pro biotics with
lactobacillus and antibiotic with metronidazole
on the pack help to recover faster .
Hope this clears your query .
Welcome for further questions .
Thanks .
Regards .