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What Really Are Germs?

The term "germs" refers to the microscopic bacteria, viruses, fungi, and protozoa that can cause disease. It's a good idea to learn about the different types...

Ernest Senaya Ernest Senaya By Ernest Senaya
12 Feb 2008
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The term "germs" refers to the microscopic bacteria, viruses, fungi, and protozoa that can cause disease. It's a good idea to learn about the different types of germs, where they come from, and how to keep them from interfering with your child's health. Hand washing is the single most important thing your family can do to prevent these germs from leading to infections and sickness. Types of Germs Bacteria are tiny, single-celled organisms that get nutrients from their environments. In some cases, that environment is your child or some other living being. Some bacteria are good for our bodies — they help keep the digestive system in working order and keep harmful bacteria from moving in. Some bacteria are used to produce medicines and vaccines. But bacteria can cause trouble, too, like cavities, urinary tract infections, or strep throat. Viruses can't survive, grow, and reproduce unless a person or an animal puts up rental space. Viruses can only live for a very short time outside other living cells. For example, they can stay on surfaces like a countertop or toilet seat in infected bodily fluids for a short period of time, but they quickly die there unless a live host comes along. Once they've moved into someone's body, though, viruses spread easily and can make a person sick. Viruses are responsible for some minor sicknesses like colds, as well as extremely serious diseases like smallpox or HIV/AIDS. Fungi are multi-celled, plant-like organisms that usually aren't dangerous in a healthy person. Fungi get nutrition from plants, food, and animals in damp, warm environments. Two common fungal infections are athlete's foot and yeast infections. People who have weakened immune systems (from diseases like HIV or cancer) may develop more serious fungal infections. Protozoa are, like bacteria, one-celled organisms. Protozoa love moisture, so intestinal infections and other diseases they cause are often spread through contaminated water. Once organisms like bacteria, viruses, fungi, and protozoa invade a body, they get ready to stay for a while. These germs draw all their energy from the host. They may damage or destroy healthy cells. As they use up your nutrients and energy, most will produce waste products, known as toxins. Some toxins cause the annoying symptoms of common colds or flu-like infections, such as sniffles, sneezing, coughing, and diarrhea. But other toxins can cause high fever, increased heart rate, and even life-threatening illness. If a child isn't feeling well, the doctor may take blood tests, throat cultures, or urine samples to determine which germs (if any) are responsible. Protection From Germs Because most germs are spread through the air in sneezes or coughs or through bodily fluids like sweat, saliva, semen, vaginal fluid, or blood, your best bet is to limit contact with those substances, as far as possible. Hand washing. Washing your hands, and teaching kids the importance of hand washing, is absolutely the best way to stop germs from causing sickness. It's especially important after coughing or nose blowing, after using the bathroom, after touching any pets or animals, after gardening, and before and after visiting a sick relative or friend. There's a right way to wash hands, too. Use warm water and plenty of soap, then rub your hands together vigorously for at least 10 seconds (away from the water). You may want to sing a short song — try "Happy Birthday" — during the process to make sure you spend enough time washing. Rinse your hands and finish by drying them thoroughly on a clean towel. When working in the kitchen, wash your hands before you eat or prepare food, and make sure that kids do the same. Use proper food-handling techniques — use separate cutting boards, utensils, and towels for preparing uncooked meat and poultry; and warm, soapy water to clean utensils and countertops. Cleaning. Periodically wipe down frequently handled objects around the house, such as toys, doorknobs, light switches, sink fixtures, and flushing handles on the toilets. Soap and water are perfectly adequate for cleaning. If you want something stronger, you may want to try an antibacterial soap. It may not kill all the germs that can lead to sickness but it can reduce the amount of bacteria on an object. You can also use bleach or a diluted solution that contains bleach, but you may want to use soap and water afterwards so that the strong smell doesn't irritate your child's nose. It's generally safe to use any cleaning agent that's sold in stores but try to avoid using multiple cleaning agents or chemical sprays on a single object because the mix of chemicals can irritate skin and eyes. Vaccines. Another way to fight infections from germs is to make sure your family has the right immunizations, especially if you'll be traveling to countries outside the United States. Other yearly immunizations, such as the flu vaccine, may be a particularly good idea if you or your child has a weakened immune system or other chronic medical problems. Teens who are sexually active should understand that condoms can prevent infection because viruses, bacteria, fungi, and protozoa can be spread via oral, anal, or vaginal contact. Also, all teens should be vaccinated against hepatitis B. This disease is often transmitted through sexual activity but people also can get it from contaminated needles, such as those used for tattooing or drugs. With a little prevention, you can keep harmful germs out of your family's way!
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