Mom had knee replacement surgery and now has diahrrea for two months

[Rick2016]

My mother had full knee replacement surgery around october. The operation seems to have been a success. But a few weeks after the operation she developed diahrrea. It has now lasted more than 2 months. She has lost 14 pounds. All tests come back negative. SHe has taken several medicines aND probiotics. Her diahrrea is watery. Not solid at all. She goes 4 times a day sometimes more. She has gone 10 times in half a day at some point . Has not taken antibiotics since the operation. I understand this could have been the cause. Diet is brat diet plus proteins such as chicken. No fever or vomiting. Does have gas and cramps. Please any help  would be appreciated. Anyone with similar experience after knee replacement surgery.

[cnoevl21]

what tests has she had done? I dont see anything in her meals that would cause this, unless she is allergic to something. May be beneficial to have a food allergy test done just to be safe. Otherwise, you're looking at celiac, crohns, colitis, etc.
I can't be food poisoning, but it could be some sort of parasite.
If it hasnt been done yet, I'd suggest endoscopy and colonoscopy, as well as allergy test.
I'd also stop drinking gatorade, that stuff isnt good for you. the best thing for keeping hydrating and replenishing what you lose with diarhhea is coconut water.

[Rick2016]

Probiotics:
My mom takes something called: Multiflora
She takes 2 capsules, in the morning before eating. The box says:  probiotics 1 x 10^ UFC (10 to the power of 8) box says it includes:  Lactobacilus  Casei,  Lactobacilua Rhamnosus, Streptococus Thetmophilus, Bifidobacterium Breve;  Lactobacilos Acidophilus; Bifidobacterium  Lomgun; Lactobacilum Bulgaricus

[Rick2016]

Antibiotics:
For the operation she was given melittase for 15 days and then ciprofloxacine  for another 15 days . A total of 30 days.
About a year before the operation she had been given antibiotics to kill a bacteria H pilori  which had given her ulcers

[Rick2016]

you for replying.
She eats the following:
Breakfast: toast and milk (no cream and no lactose)
Lunch: white rice, chicken or fish with no grease, sometimes ground beef with vegetables, plantains or corn tortillas (no bread or flour)
Dinner: boiled potatoes, boiled eggs, or scrambled eggs

Between meals: bananas, apples , pears, gerber

Olive oil is sometimes used in the food.

She drinks water and juice sometimes. Gatorade. Juice is orange juice or carrot juice. Sometimes lip ton tea

[cnoevl21]

What is the diet exactly? Give me a daily run down. What probiotic?