Amongst the many reported health benefits of chocolate (including its ability to lower heart disease risk, prevent wrinkles and boost the mood), the popular treat is also a great pick-me-up snack, which is great news for chocoholics.
Credit: Dr. Libero Ajello/CDC. In addition to viruses and bacteria, there are three other major types of microbes that can cause infectious diseaseâand one newly discovered type. As with viruses and bacteria, not all of the species in each of these categories are infectious to humans. But many of the worldâs most prevalent infectious diseases are caused by microbes that are included in the groupings below. Fungi cause a wide variety of diseases in humans, ranging from Athleteâs foot to ringworm to deadly histoplasmosis.
Microorganisms, like certain bacteria and yeasts, living on the human skin or in the nose, mouth, throat, small and large intestine and vagina, are part of the normal human flora; they prevent overgrowth of harmful microorganisms. Some of these microbes, when overgrow, may become pathogenic, though.xamples of bacteria pathogenic for a human are: 1  Staphylococcus aureus, causing skin infections, pneumonia, infection of the heart valves, etc. 2  Streptococcus pyogenes, causing âstrep throatâ, cellulitis, etc. 3  Neisseria gonorrheae, causing gonorrhea.