Home > Newsletters > Daily: Love or hate Earth Hour? > Daily Dose: Rare flesh-eating bacteria kill boy within days > Health-in-Motion 12 December 2017 Your mouth is home to a plethora of different bacteria You might be surprised to hear that your mouth is home to a plethora of different bacteria. But don’t be alarmed, many of the hundreds of species of microorganisms that live in your saliva play an important role in defending you against a variety of harmful pathogens attempting to enter your body. Recently, British researchers have discovered that the particular mix of these salivary microbes is not passed on from parent to child, but is mostly determined by the household environment in which you grow up as a small child. 0 More: Daily Dose: Rare flesh-eating bacteria kill boy within daysHealth-in-Motion advertisement Other news Medical SEE: Here’s something you should do every 2 hours if you sweat a lot Lifestyle The surprising reason you’re getting side pains once a month Diet and nutrition 5 myths about antioxidants that will blow your mind Lifestyle 7 body parts we don't actually need Sex Are you having the right amount of sex for your health? Medical SEE: How much liquid can a condom hold? From our sponsors Managing diabetes in the workplace Back-to-school with diabetes Discover treatments that can help reduce acne What can I do to reduce or remove acne marks? Live healthier Fact or myth? » Clearing up the confusion around coconut oil Coconut – the 'fruit of life' Can coconut oil really help you lose weight? Experts dish on the high-cal weight-loss tactic. Sobering perks! » 5 tips to avoiding a hangover Can you really be allergic to alcohol? Is giving up booze for a month actually worth it? Many people commit to "Dry January" – but does it do your body any good?