While exact figure is not listed, according to the National Institue of Allergy and Infectious Diseases, less than 1 percent of bacteria cause diseases in humans.
Microbes belonging to the bacteria group are made up of only one cell. They are so small that a line of 1,000 could fit across the eraser of a pencil.
Not all bacteria are harmful, most of them are either harmless, or helpful, or even essential to life. For instance, Lactobacillus acidophilus, a harmless bacterium that resides in our intestines, helps us digest food, destroys some disease-causing organisms and provides nutrients.
Many disease-causing bacteria produce toxins, powerful chemicals that damage cells and make you ill. Bacteria cause diseases such as:
Strep throat
Tuberculosis
Plague
Syphilis cholera
Urinary tract infections
Learn more about bacterial infections at HumanIllnesses.com.
Check out Five Things You Can Do To Prevent Infection, shared by Meridian at Home.