10 supermarket health dangers

Surprising hidden perils lurk in the grocery aisles.
© MSN Healthy Living // © MSN Health

The junk-food aisle isn’t the only health danger lurking in your supermarket. From the meat department and produce section to the checkout stand, many places in even the cleanest, best-maintained grocery stores are rife with things that could make you sick. Here, experts discuss the biggest health hazards and ways to protect yourself.

-- By Linda Melone for MSN Healthy Living

1 of 12 Grocery store (Neustockimages/Getty Images)

Produce misters

Many supermarkets mist their fresh produce using timers set to spray fruits and vegetables at regular intervals. This re-crisps leafy greens and adds visual appeal for shoppers. The problem is, misting machines using reservoir tanks can breed bacteria called Legionella pneumophila, which causes Legionnaires’ disease, a type of pneumonia. In 1990, an outbreak of Legionnaires’ disease in Bogalusa, La., linked to a supermarket misting machine resulted in 34 confirmed cases of the disease and two deaths.

“It’s not a problem unless you inhale the droplets,” says Connie Morbach, a microbiologist for Sanit-Air Inc., a Michigan-based mold testing company. “Doing so may lead to an upper respiratory infection but can be most dangerous if you have a compromised immune system.” Morbach recommends steering clear of the sprayers when they’re in operation.

2 of 12 Produce section (Xefstock/Getty Images)

The cleaning-products aisle

If you find yourself sneezing and wheezing your way down the cleaning-products aisle of the grocery store, you may have a chemical sensitivity to the gases given off by these products, says Dr. James Sublett, vice president of the American College of Allergy, Asthma and Immunology and chairman of the Indoor Environment Committee.

“People who react this way to strong fragrances and do not exhibit an actual immune-system response have what’s called ‘nonallergic rhinitis.’ In such a case, the upper airways and nose are affected but not the lungs.” People who experience a full-blown asthma attack from simply walking down the cleaning-products aisle should check with their physician to get their condition under better control, Sublett says.

3 of 12 Cleaning isle (Bloomberg/Getty Images)

Checkout belts

Placing fresh produce on the checkout belt invites germs to have a field day.  Packages of poultry, ground meat, fresh fish and even filet mignon and sushi-grade tuna have one thing in common, says Michael Schmidt, a microbiologist at the Medical University of South Carolina: “They are loaded with nutrients that will feed the resident germs on the grocery belt, which latch on to your fresh produce.”

You may find E. coli, Staphylococcus aureus and even Clostridium perfringens, responsible for chicken-gravy food poisoning. Stay safe by always placing produce in a plastic bag and never directly on the belt, and be sure to wash all fresh produce under running water before eating it.

4 of 12 Checkout belt (Ryan McVay/Getty Images)

The meat department

When you hear about outbreaks of food poisoning from meat, ground meats are almost always to blame. There’s a good reason for that, Schmidt says. “Pre-packaged, ground meats are typically analyzed by lots for bacterial contamination. A pound of ground meat is actually the product of many animals, and the butchering process is not sterile.” Germs can be introduced at any point in the processing chain. Whether or not the meat is ground in-house at your local grocer, you still have the issue of many animals within the pound of meat. Good butchers dismantle and clean the grinder before grinding another type of meat, Schmidt says. “However, shortcuts happen.” As long as the product has been kept at the proper, cold temperature, you are generally assured a safe product, if you cook the meat properly.

5 of 12 Meat (Thomas Craig/Getty Images)

Cash register receipts

Even if you manage to dodge the misters and the germs on the checkout belt, you’re not necessarily in the clear. The ink on your receipt may be your worst enemy. The plastic component, Bisphenol A (BPA), made with synthetic estrogen, has been in headlines lately for its link to some cancers, asthma, cardiovascular disorders and other serious health issues. Food packaging typically contains BPA, but most shoppers are unaware it’s also used in cash register receipts. The Environmental Working Group, an environmental health research and advocacy organization, found BPA in two-fifths of the paper receipts they had tested by a major laboratory.

Reduce your exposure by:
• Minimize receipts whenever possible and opt for email receipts.
• Never give a child a receipt to play with.
• Avoid using alcohol-based sanitizer after handling receipts. A 2010 study  published in the journal Analytical and Bioanalytical Chemistry shows it can increase absorption of the chemical.
• Wash your hands with soap before preparing food after handling a receipt

6 of 12 Receipt tape (Adam Gault/Getty Images)

Cloth grocery bags

Cloth grocery bags may be more environmentally friendly, but they’re not health-friendly unless you wash them regularly. The fabric can trap germs such as salmonella and E. coli from foods, transfer them to other foods and make you sick. Even milk, although it’s pasteurized, creates food for bacteria to grow, says Kevin Morano, an associate professor in the department of microbiology at the University of Texas Health Science Center at Houston Medical School.

“If the bag gets warm and wet, it creates a fungal incubator.” Morano recommends washing cloth grocery bags every couple of uses or immediately if food leaked. Wash bags in a clothes washer and be sure to dry the bag thoroughly before using or storing them in a cool, dry place – not in your car’s trunk, which causes bacteria to grow.  In addition, use separate cloth bags for meats, fresh fruits and vegetables and ready-to-eat foods, and do not use the same reusable bags to carry other items such as baby toys, bottles and gym clothes.

7 of 12 Reusable grocery bags (Martin Leigh/Getty Images)

The credit-card pad

Before you swipe your credit or debit card at the checkout, consider all the people before you who used that same pad. As with elevator buttons and ATM keys, cold and flu germs can be passed along through inanimate objects, called “fomites,” as they relate to their germ-carrying capabilities.

“Supermarkets are actually far worse than ATM machines and elevator buttons, because you’re handling a wide variety of potential pathogens, from fruits and vegetables to meats,” says Philip M. Tierno Jr., director of clinical microbiology and immunology at the New York University Langone Medical Center and author of “The Secret Life of Germs.” Fortunately, it’s easy enough to protect yourself: Wash your hands thoroughly as soon as you can and avoid touching your face in the meantime, Tierno says.

8 of 12 Credit-card pad (Juanmonino/Getty Images)

Kid-size grocery carts

Child-size grocery carts allow kids to shop with mom or dad, but the germs you find on these cute mini carts are no different from that found on toys they encounter at a day school – mostly staph and strep, Schmidt says.

“Children are thought to be walking and talking repositories full of germs,” he says. Day-care workers teach children to wash their hands before eating, and teachers and staff are usually good at keeping food and toys separate so that the germs are not consumed with the foods, Schmidt says.  “To protect your child from picking up germs, do the same at the store,” he says. “Even when they are clamoring for that free cookie, wash before eating or use hand sanitizer.”

9 of 12 Kid-sized grocery cart (Katrina Wittkamp/Getty Images)

Cracked eggs

Eggshells crack easily when the cartons are stacked on grocery store shelves. Even small cracks can harbor some nasty germs. “When the shell cracks, germs can invade, but they are generally inhibited by one of the proteins common to the white of the egg: lysozyme,” Schmidt says. “However, cracked eggs spoil when the germs tunnel their way past the white and that protective lysozyme. When they reach the yolk, they feast, resulting in a rotten egg and that nasty smell.” So before you buy eggs, check that all of the shells are intact and none is leaking. Hygiene is a must when handling eggs, Schmidt says. At home, wash hands, utensils, equipment and work areas with hot, soapy water before and after contact with eggs.

10 of 12 Carton of eggs (Mike Kemp/Getty Images)