Me and my family have been drinking milk from a local vendor for the past 5 months, but lately I have observed that milk seems adulterated. And when I fed the milk to my brother's 1 year child, she started having dysentery. Also, recently, I tried making curd but it would just lump up like a paste. If my suspicion is correct, what are the possible impact of having such adulterated milk for such a period. I am worried about the likely asymptomatic effects. Kindly advise. Thank you. Also is packaged milk better?