Why reports of fecal bacteria in iced coffee suggest bigger health problems

To the question, "Would you like anything else with that?" no one answers "fecal bacteria."

Unfortunately, it may be accompanying orders of iced coffee drinks at three coffee chains in the UK anyways, according to a recent BBC investigation.

The BBC reports that it found "varying levels" of the bacteria in samples of iced drinks from Starbucks, Costa Coffee, and Caffe Nero.

All three companies told the BBC they'd "taken action" on the findings. Starbucks also told the BBC it was also conducting its own investigation and maintained that it takes hygiene "extremely seriously."

The presence of fecal bacteria — which can cause diarrhea if ingested — could be a sign that there are nastier germs also present, said
Philip Tierno, a microbiologist at New York University.

Related: You may want to be wary of the iced coffee, but here are the healthiest foods Starbucks has to offer:

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Healthiest foods at Starbucks
9. Vanilla scone (120 calories, 8 grams of sugar) 
8. Chocolate cake-pop (140 calories) 
7. Fruit salad (90 calories) 
6. Hearty veggie and brown rice salad bowl (430 calories, healthy fat and protein) 
5. Nonfat latte (100 calories in a grande, 10 grams of protein) 
4. Skinny cappuccino (61 calories in a tall) 
3. Egg white, spinach and feta wrap (19 g of protein, 10 g of fat, 33 carbs) 
2. Reduced fat turkey bacon and egg white sandwich, (16 g of protein, 230 calories) 
1. Whole grain oatmeal (160 calories without the toppings) 
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"Where there are fecal bacteria present it is an indicator that there could be other germs that are pathogenic [or illness-causing] like Norovirus or hepatitis A or Salmonella that can make you sick," Tierno told Business Insider.

It also suggests that workers at the chains are not keeping themselves clean, that they "have dirty bare hands," he said.

In addition to sampling the ice at 30 of the chains, British researchers also studied their tables, trays, and high chairs. London chain Costa Coffee ranked worst, with seven out of 10 samples "found to be contaminated with bacteria found in feces."

Starbucks and Caffe Nero also tested positive for fecal coliforms in three out of 10 samples.

Business Insider reached out to all three companies but did not immediately hear back.

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