Other cancers in humans are also known to be caused by viruses. It is tempting to assign human traits to viruses thinking of them as contriving and evil. But, they... ... middle of paper ... ... enter your body. Some vaccines, such as those for polio, measles and smallpox have been highly effective in removing the causative pathogens from the population. Others viruses including HIV, influenza and those that cause the common cold, are able to change enough to evade recognition by the responding antibodies as to render current vaccines useless.
- They are about 1/100th the size of body cells. - They make you ill by damaging your cells and producing toxins. - Some can be useful if they are in the right part of the body. Fungi: -Fungi can cause a number of plant and animal diseases: in humans, ringworm, athlete's foot, and several more serious diseases are caused by fungi. - Because fungi are more chemically and genetically similar to animals than other organisms, this makes fungal diseases very difficult to treat.
König H, Frank D, Heil R, Coenen C. Synthetic genomics and synthetic biology applications between hopes and concerns. Curr Genomics. 2013;14(1):11-24. 3. Ruder WC, Lu T, Collins JJ.
Common diseases caused by prions would be Bovine Spongiform Encephalopathy (known informally as “Mad Cow disease”), and Crutzfeldt-Jakob disease. There are also strains of diseases infecting other mammals as well, including Elk (Chronic Wasting disease) and Mink (Transmissible Mink Encephalopathy). One common connection is that all prion-caused diseases primarily damage the brain tissue of the patient. All known prion diseases are fatal, and have no cure or treatment. Prions were first brought to the attention of the medical community by a man named Stanley Prusiner.
Bacteria are unicellular organisms called prokaryotes. Viruses are pieces of biomolecules that cannot reproduce independently. Both groups may be pathogens, or may be beneficial- sometimes, the same species or variety may be both, depending on circumstances (Starr, C., and Taggart, R., 2004.) Throughout history, pathogens and more helpful species have played vital roles in the development of humanity as a species and of the human social arrangement. Prokaryotes are divided into eubacteria and archaebacteria.
Antibiotic resistance occurs when microorganisms become immune to specific drugs that are prescribed by doctors to kill other microorganisms. Usually, bacteria can be eradicated because they are single celled organisms but when drugs become defiant, they do not function properly. When antibiotics are taken, they enter the bloodstream and interfere with all microbes in the body while also altering body functions (Bren FDA, 2003). Sometimes antibiotics may not necessarily target its “wanted” target but instead, they attack both harmful and benign bacteria. When the bacteria that are sus... ... middle of paper ... ...inistration.
This system involves the body's ability to distinguish cells that are part of the body from those that have found their way in and are harmful. Most of these unwanted substances are viruses, bacteria, and other type of disease causing organisms. When a cell in our body has become infected or has become cancerous it’s surface changes. This is how the immune system can tell good cells from bad ones (the markings on the surface.) Once a bad cell has been recognized our bodies sends cells to destroy the damaged cell and prevent the spread of whatever caused the damage in the first place.
Various forms of these diseases have been found in many animal species, including humans. The actual means by which PrPSc propagates itself remains unknown but scientists believe the modified protein alters the normal protein molecules. The diseases may be contracted in a variety of ways. They may be genetically inherited, acquired by contamination, or occur sporadically on their own. All forms, however, are fatal.
Taxonomy of biological organisms begins with the single identification whether they are living or not. Viruses are usually considered as non-living ones, as they can grow and replicate only inside cells. Because of their nature they are mainly pathogenic, causing different diseases in humans. Herpesvirus family is one of the most known ones and associated with development of cancer diseases. Cytomegalovirus, which is considered to cause mild form diseases, is largely underestimated as it can cause various complications.
"NIH - Hepatitis C." NIH - Health Information. Web. 29 Mar. 2010. . "Virus-Host Cell Interactions during Hepatitis C Virus RNA Replication: Impact of Polyprotein Expression on the Cellular Transcriptome and Cell Cycle Association with Viral RNA Synthesis -- Scholle Et Al.