Washing hands well and often is the best way to prevent germs from leading to infections and sickness. Some bacteria are good for our bodies — they help keep the digestive system in working order and keep harmful bacteria from moving in. Some bacteria are used to make medicines and vaccines. But bacteria can cause trouble too, as with cavities, urinary tract infections , ear infections , or strep throat.
Antibiotics are used to treat bacterial infections. Viruses are even smaller than bacteria. They aren't even a full cell. They need to use another cell's structures to reproduce, which means they can't survive unless they're living inside something else such as a person, animal, or plant. Viruses can only live for a very short time outside other living cells. For example, viruses in infected body fluids left on surfaces like a countertop or toilet seat can live there for a short time, but quickly die unless a live host comes along.
Viruses infect all types of life forms, from animals and plants to microorganisms, including bacteria and archaea. A fungus is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts, molds and mushrooms. A parasite is an organism that has sustained contact with another organism to the detriment of the host organism. No cell membrane. Yes, they have a cell membrane. Intercellular organisms. Either intracellular or extracellular Can be intracellular or extracellular Host Can grow on non-living surfaces Need a living host like plants or animals Can grow on its own Can grow on non-living surfaces Mode of nutrition Can be autotrophs but mostly heterotroph Heterotroph Heterotroph, usually feed on the dead and decayed matter.
Get materials and energy from host cells. They use pre-existing carbon sources in their environment and use the energy from chemical reactions. Living Yes Characteristics of both living and non-living. Yes Yes Transmission 1. Direct contact with an infected person. Contaminated food or water. Fungi are more complicated organisms than viruses and bacteria—they are "eukaryotes," which means they have cells.
Of the three pathogens, fungi are most similar to animals in their structure. There are two main types of fungi: environmental, which are yeast and mold that often live in soil and don't generally cause infection in most healthy people; and commensals, which live on and in us and generally don't hurt us.
Certain environmental fungi reproduce "spores," particles that can enter our body through the lungs or on the skin. These fungi can be especially damaging for people with weakened immune systems, as the fungi can spread quickly and damage many organs.
Fungi are slower to mutate, so they are easier to target with antifungal medications than bacteria are with antibiotics. Skip to content. How viruses make us sick. Viruses also are capable of infecting any living thing, including bacteria and fungi.
How to treat viruses. How bacteria makes us sick. How to treat bacterial infections. How fungi makes us sick. Commensal fungus, may play a beneficial role in our overall health. Other fungal infections can be caused by an overgrowth of commensal fungus. How to treat fungal infections. Tags: Expert Advice. Popular Categories.
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