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History of microbiology quizlet
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How is it possible for minuscule organisms to result in the deaths of hundreds of gigantic humans? This is the question that many scientists were trying to track down an answer to. In the book entitled Microbe Hunters, the author, Paul de Kruif, describes multiple scientists that participated in microbe hunting, where they tracked down the causes of many diseases in the world while trying to locate cures or preventives. From the 17th century until the 20th century, Paul de Kruif informs his readers about many diseases and the journey that many had to endure in order to prevent it from spreading. Three scientists that especially made their mark are Robert Koch, Élie Metchnikoff, and Paul Ehrlich. These three men made astonishing discoveries that …show more content…
He had some minimal success in his experiments, but the observations he made after the experiments were imperative. Specifically, one of the observations he made was that changing a dye could result in the production of a cure. Many scientists said that Atoxyl could not be modified without becoming spoiled, but Ehrlich proved them wrong. He might not have made a solid cure but still showed that there was room for improvement in certain elements. Furthermore, when he changed Arsenic, the results were astounding and unbelievable. The construction of preparation 606 was momentous because it was effectual with no harm to the body. This preparation 606 was able to treat syphilis and other diseases associated with trypanosomes. He created the magic bullet that he had talked about for years, the one that would eliminate the tiny creatures that murdered thousands of innocent men. Many other scientists tried to treat people with certain diseases by using non-harmful substances but Ehrlich chose a different path. In summation, Paul Ehrlich was the man that changed a drug that was an assassin into a
Plagues and Peoples written by William H. McNeill follows the patterns of epidemics and endemics within human history. It is within this history that McNeill finds parallels between diseases and humans in the forms of microparasitism and macroparasitism. Merely from the title, McNeill gives equal importance to viruses and humankind. In several instances, humans behave the same way viruses, bacteria, and parasites do in order to survive and to compete. Surprisingly enough, McNeill’s overarching theme can be summarized using his last sentence, asserting that “Infectious disease which antedated the emergence of humankind will last as long as humanity itself, and will surely remain, as it has been hitherto, one of the fundamental parameters and
Jennifer Ackerman's main focus in her article The Ultimate Social Network, is that of the functions concerning bacteria within humans. Although scientists have had presumptions about humans being proficient in governing their body’s innermost structure, they soon come to recognize the sophistication of our inner space which holds an extensive plethora of bacteria and other microorganisms that lie within each and every one of us. Moreover, scientists' new and emerging view of how the human body operates, and the cause of increasing present-day diseases (i.e. obesity and different autoimmune disorders) are uncovered by analyzing effects of certain microbe species in our bodies. By italicizing on points such as the above, in conjunction with bacteria's genetic variations, and modern computing technology, the author proves that scientists are quickly progressing with the characterization the most prevalent species of microbes, which, in her opinion, is definitely paying off.
our everyday lives bacteria is constantly surrounding us, some of the bacterium that we encounter are beneficial to us but then there are the ones that are severely detrimental to our health. The way that they effect a persons body can differ from person to person. Many of the “microscopic foes” are very resilient and have a very fast reproduction rate. Not only do they reproduce quickly they sometimes seem to outsmart our immune system and not allow our bodies to fight the infection making it almost impossible to stop them. One thing that a lot if people rely on is the assistance of prescription drugs to get them better but even the drugs are not being effective and we can’t stop the pathogens from invading our personal places such as work, home, school, or anywhere. Even though modern medicine is advancing the pathogens could still get the get the best of us. The scary thing is we never know when the next pandemic or epidemic is going to arise. All it needs is some ordinary microbe to swap genes with a deadly germ to produce a “super pathogen” and it could happen to anyone, anywhere, as it did to Jeannie Brown who is from “our neck of the woods”.
A remarkable breakthrough in medicine occurred in the late 1800s through the work of Louis Pasteur. Pasteur's experiments showed that bacteria reproduce like other living things and travel from place to place. Using the results of his findings, he developed pasteurization, which is the process of heating liquids to kill bacteria and prevent fermentation. He also produced an anthrax vaccine as well as a way to weaken the rabies virus. After studying Pasteur's work, Joseph Lister developed antisepsis, which is the process of killing disease-causing germs.
In the last decade, the number of prescriptions for antibiotics has increases. Even though, antibiotics are helpful, an excess amount of antibiotics can be dangerous. Quite often antibiotics are wrongly prescribed to cure viruses when they are meant to target bacteria. Antibiotics are a type of medicine that is prone to kill microorganisms, or bacteria. By examining the PBS documentary Hunting the Nightmare Bacteria and the article “U.S. government taps GlaxoSmithKline for New Antibiotics” by Ben Hirschler as well as a few other articles can help depict the problem that is of doctors prescribing antibiotics wrongly or excessively, which can led to becoming harmful to the body.
The medical field is a vast land of beauty but with great beauty comes immense horror. There are many deadly viruses and diseases found in the medical field. In the novel, The Hot Zone by Richard Preston, the author discusses the many deadly viruses found in the field. The viruses are widespread due to the errors that occur when the viruses are in the presence of human beings. The effects of the errors performed by the human race include a decrease in population and wildlife. The viruses are spread in many different ways in the novel, but all are due to human mistakes.
New medications are discovered daily. However, had Mary Shelly's proposition of "playing god" been a reality in the late 18th century, and had Victor Frankenstein been able to take this dramatic shortcut in the slow process of evolution by creating life from death, the crisis between the church and science would have been decidedly against science. Such were the sentiments of Victor's headmaster at Ingolstadt, as well as the rest of the European scientific community. Frankenstein's intentions were good. He had wanted to rid the world of genetic defects and bacterial disease by creating the perfect man. He would do so by applying electricity to the polar regions of a body, which he had constructed from pieces of freshly executed villains, while submerging them in an elemental pool of life. However, he was so driven towards his goal that he never considered the consequences of his actions. He was in many ways acting like the benefactor of Jurassic Park, hastily creating a life form without consideration of possible detriments. When Frankenstein had created his monster, he didn't know what to do with it and immediately wished it dead, but ironically he had made it so strong that it would not die.
Disease and parasitism play a pervasive role in all life. Many of these diseases start with microparasites, which are characterized by their ability to reproduce directly within an individual host. They are also characterized by their small size, short duration of infection, and the production of an immune response in infected and recovered individuals. Microparasites which damage hosts in the course of their association are recognized as pathogens. The level of the interaction and the extent of the resultant damage depends on both the virulence of the pathogen, as well as the host defenses. If the pathogen can overcome the host defenses, the host will be damaged and may not survive. If on the other hand the host defenses overcome the pathogen, the microparasite may fail to establish itself within the host and die.
Besides reproduction, a microbe needs a suitable environment to survive. In most cases this environment is a large animal population. With this type of environment a microbe is able to survive by, ironically, not killing everyone off. If a population is small and dense, the microbe will spread to all the animals in the immediate area and, if lethal, kill the entire species off. This not only ends the existence of the animal in this immediate population, but the existence of the microbe since it has no carrier to leach itself to. Therefore, the ideal population for a deadly microbe is a population t...
Every year millions of people die. People die either from natural causes or from another source like murder. Cancer and AIDS are the number one diseases leading to death in the 21st century. (Jueneman 1) However, they have not always been the leading diseases. Around as early as 542 AD, a deadly disease broke out in Constaniople and quickly spread around the world within a few hundred years. This disease in considered the worst natural disaster in history. The Bubonic plague, also known as the Black Death, is historically the disease that has caused the most deaths and caused China, Europe, and India to shortly stop trade altogether.
Bacterial cells, like plant cells, are surrounded by a cell wall. However, bacterial cell walls are made up of polysaccharide chains linked to amino acids, while plant cell walls are made up of cellulose, which contains no amino acids. Many bacteria secrete a slimy capsule around the outside of the cell wall. The capsule provides additional protection for the cell. Many of the bacteria that cause diseases in animals are surrounded by a capsule. The capsule prevents the white blood cells and antibodies from destroying the invading bacterium. Inside the capsule and the cell wall is the cell membrane. In aerobic bacteria, the reactions of cellular respiration take place on fingerlike infoldings of the cell membrane. Ribosomes are scattered throughout the cytoplasm, and the DNA is generally found in the center of the cell. Many bacilli and spirilla have flagella, which are used for locomotion in water. A few types of bacteria that lack flagella move by gliding on a surface. However, the mechanism of this gliding motion is unknown. Most bacteria are aerobic, they require free oxygen to carry on cellular respiration. Some bacteria, called facultatibe anaerobes can live in either the presence or absence of free oxygen. They obtain energy either by aerobic respiration when oxygen is present or by fermentation when oxygen is absent. Still other bacteria cannot live in the presence of oxygen. These are called obligate anaerobes. Such bacteria obtain energy only fermentation. Through fermentation, different groups of bacteria produce a wide variety of organic compounds. Besides ethyl alcohol and lactic acid, bacterial fermentation can produce acetic acid, acetone, butyl alcohol, glycol, butyric acid, propionic acid, and methane, the main component of natural gas. Most bacteria are heterotrophic bacteria are either saprophytes or parasites. Saprophytes feed on the remains of dead plants and animals, and ordinarily do not cause disease. They release digestive enzymes onto the organic matter. The enzymes breakdown the large food molecules into smaller molecules, which are absorbed by the bacterial cells. Parasites live on or in living organisms, and may cause disease. A few types of bacteria are Autotrophic, they can synthesize the organic nutrients they require from inorganic substances. Autotrophic bacteria are either photosynthetic or Chemosynthetic. The photosynthetic bacteria contain chlorophyll that are different from the plant chlorophyll. In bacterial photosynthesis, hydrogen is obtained by the splitting of compounds other than water.
Microbes are major key components in both are homes and industrial food preparation. There are number of lactic acid which is a form of bacteria which is a large group of beneficial bacteria used in certain foods while they are getting prepared such as yogurt, cheese, sour cream, butter milk and other type of fermented milk products. Things such as vinegars are produced by bacterial acetic acid fermentation. Yeast is also major use in the making of beer and wine and also for the leaving of breads. This also involves fermentations to convert corn and other vegetable carbohydrates to also make beer, wine or gasohol but also bacteria is the agents of are other foods. Other fermented foods will include things such as soy sauce, olives and cocoa. (Microbes and human life, 2013) Single cell proteins are known as dried cells of microbes which are used in protein supplement shacks. They are also called “novel food” and “minifood”. The production of this requires micro-organisms which then serve as the protein source and then the substrate which is biomass which they grow on them. There are a number of both these sources that we are able to use for the production of single cell protein (SCP). The micro-organisms used belong to the following groups of Algae, Fungi and bacteria. (Slide Share, 2012)
This process later became known as chemotherapy, and Salvarsan is credited as being its first form (Lloyd et al. 2005). This provided the basis for modern medicine; nearly every drug released today is discovered in the same manner that Salvarsan was discovered, by testing the reactions of disease-causing organisms to a vast array of chemical compounds (Aminov 2016). Ehrlich was also credited as one of the first to theorize that cells have receptors that allow them bind to specific chemical compounds, a theory considered controversial until the late 1960s (Andreas-Holger 2009). Ehrlich was clearly ahead of his time, but while his discoveries were innovative and vast, some of them are still not entirely
During the medical experiments not a lot of things came from it. One experiment lead to the the cure for yellow fever. The other experiments didn’t seem to be useful, they were just crazy ideas that they thought they needed to know. They were just part of the killing of millions of Jews that science didn’t find
The earth, however large it may be, has it limits when it comes to natural resources. Of all animals human are the only ones that make non-biodegradable waste. When humans run out of resources in one area they go on to the next destroying the area in their path and until a new site is reached with more resources to abuse. This is much like the life history of flesh eating bacteria. About two years ago, I saw a special on 20/20 about the disease. They say that is moves at about an inch per hour and that they don’t stop feeding on the host until the host is dead. The bacteria multiply at a high rate and can migrate to other parts of the body by the blood stream. Try to look as the host body as the earth, the bacteria as the humans, and the blood stream as the oceans and river; now, anyone can see that this is no diffe...