These revealing images come from Tasha Sturn, a laboratory assistant at Barillo College's microbiology lab in Aptos, California. To demonstrate bacterial growth to her son, she pressed his unwashed hand into a petri dish, capturing germs directly from his palm.
As detailed by Sciences et Avenir: "Tasha Sturn collected what is likely a mix of resident flora and transient flora, including species from the environment and even the digestive tract."
While the biologist couldn't identify every visible colony, she emphasized: "There's nothing terrifying here. Bacteria are everywhere. Our immune system protects us effectively. Much of the hysteria around bacteria is unwarranted—they're even essential for health."
About 10 million bacteria live on our hands, making them prime vehicles for spread. They multiply rapidly, doubling every 20 minutes. Wet hands transfer 1,000 times more bacteria than dry ones. Bacteria can survive on skin for hours. Washing every four hours curbs their growth.
France's National Institute for Prevention and Health Education (INPES) reports that 7 out of 10 people skip handwashing after public transport or nose-blowing, and 4 out of 10 cook without washing first. Consistent hand hygiene is key to preventing viruses and infections.
Source: tophealth.com
