In “Star Trek,” when the evil alien collective called The Borg set its sights on a species for assimilation, they are warned that "Resistance is futile."

But in today's world, bacteria's resistance to life-saving antibiotics is anything but futile. The Centers for Disease Control and Prevention has declared that antibiotic resistance is one of North America's top five health threats, striking more than 2 million and killing around 23,000 people every year.

Antibiotic resistance happens when bacteria become used to seeing antibiotics and develop ways to protect themselves. The bacteria also spread the word to other bacteria, some of which cause serious infections.

Then, when you need an antibiotic to kill such an infection, the antibiotic can no longer do its job.

A major cause of this resistance is antibiotics in our food supply. According to a new report, Chain Reaction, put together by Consumers Union, Natural Resources Defense Council, Center for Food Safety, and others, some chain restaurants are getting that message, and some aren't.

They surveyed 25 chains, and only Panera and Chipotle earned an A, because they offered a variety of antibiotic-free meats.

Chick-fil-A got a B (they're pledging 100 percent antibiotic-free by 2019); Dunkin' Donuts and McDonald's got Cs.

Applebee's, Arby's, Burger King, Chili's, Dairy Queen, Denny's, Domino's, IHOP, Jack in the Box, KFC, Little Caesars, Olive Garden, Outback Steakhouse, Papa John's Pizza, Pizza Hut, Sonic, Starbucks, Subway, Taco Bell, and Wendy's all took home Fs.

We aren't saying that a passing grade means the food is generally healthy (way too often, your order is not), but it's something important to consider.