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.
Pneumonia, meningitis, and food poisoning are just a few illnesses that may be caused by harmful bacteria. Bacteria come in three basic shapes: rod-shaped (bacilli), spherical (cocci), or helical (spirilla). Bacteria may also be classified as gram-positive or gram-negative.acterial skin infections are usually caused by gram-positive strains of Staphylococcus and Streptococcus or other organisms. Common bacterial skin infections include: 1  Cellulitis causes a painful, red infection that is usually warm to the touch.