"Bacteria" Essays and Research Papers


Bacterial Contamination April 15, 2013 Bacteria Contamination The definition of bacterial contamination is food contamination refers to foods that are spoiled or tainted because they either contain microorganisms, such as bacteria or parasites, or toxic substances that make them unfit for consumption This is very serious and people should take more precaution, food contamination is a serious because it results in foodborne diseases that each year affect an estimated seventy-six million...

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could achieved of which different products to test for my concluding idea. The type of bacteria that I am going to discuss and chosen is E-coli. I will also going to research the effectiveness of antibacterial cleaning products, for instance sanitizer. I will also, research which is the most effective product for the house hold and some other work places. Background Information What are Bacteria? Bacteria are found in: soil, radioactive waste, water, plants, animals, deep in the earth's crust...

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BACTERIA Period: 4 Characteristics: 3 major shapes Cocci Basilli Spirilla 3 major components Mesosomes flagella Plasmids Growing Up: Bacteria can obtain energy through phototrophs(sunlight), lithotrophs(inorganic compounds), and organotrophs(organic compounds) Marriage/Reproduction Binary Fission: The process by which all bacteria reproduce. It results in the separation of a single cell into two. Transformation: genetic alteration...

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Ubiquity of Bacteria

Microorganisms can be prokaryotic—the bacteria or eukaryotic—the algae, protozoa or fungi. While viruses are acellular they are also studied in the scope of microbiology because they are small and because they infect cells. While most bacterial are unicellular they can also exist in colonial or multicellular forms. In this laboratory exercise you will examine the ubiquity and diversity of various microbes that are present in the environment or inhabit the human body. Most bacteria that inhabit the body are...

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Good Bacteria

CHAPTER TWO Beneficial bacteria in the environment and their uses. In today’s world, the environment and its related issues are steadily gaining a lot of importance. Some bacteria are helpful and are used to obtain balance in the environment. It has been seen that helpful bacteria are useful in dissolving organic sludge from water, breaking down the growth of algae, reducing the various noxious odours such as hydrogen sulfide odours, reducing ammonia levels, promoting faster growth of fish in...

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Gut Bacteria

Gut Bacteria In today’s world, many people have a very negative connotation when they hear the word “bacteria”. Bacteria have been the cause to many diseases, however bacteria do have some benefits and uses. There are thousands and thousands of different types of bacteria in the world and one group of bacteria, Gut Flora, has become evident in the bacterial community for being beneficial. Gut Flora is a group of bacteria that consists of microorganisms that live in the digestive tracts of animals...

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Virus and Bacteria

Virus and Bacteria Virus - A virus is a capsule of protein that contains genetic material. A virus cannot reproduce on its own; it must infect a living cell to grow. Bacteria - Bacteria are one-celled organisms that live on their own. They can multiply and reproduce by subdivision Bacteria and viruses cause many of the diseases we are familiar with and may sound synonymous; they are greatly different from each other. [pic] o They differ greatly in size. The biggest viruses are only...

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Observing Bacteria

Observing Bacteria Kelli Jo Simco Microbiology Due: 2/8/13 Abstract: Microscopes are fragile instruments that must be handle with extreme caution as they can produce high quality results when observing the smallest specimens on earth. A microscope must be properly cleaned before use and storage. The different objectives allow for a range of observations. At the highest objectives, the resolution can easily be lost which is why the oil immersion lens is used to minimize refraction. While...

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Viruses & Bacteria

 Viruses & Bacteria Title: Kirby-Bauer Method of Antibiotic Effectiveness Purpose: The purpose of this lab was to determine the effectiveness of certain antibiotics and determine their zone of inhibition Data: Name of Antibiotic Zone of inhibition (mm) Effectiveness Streptomycin 15mm Sensitive Chloramphenicol 29mm Sensitive Novobiocin 20mm Intermediate Neomycin 13.5mm Intermediate Tetracycline 22mm Sensitive Analysis: 1. Which antibiotic was the most effective...

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Isolation of Bacteria

Pillay, Esmerelda (209504371) School of Biochemistry, Genetics and Microbiology Department of Microbiology University of Kwa-zulu Natal 25 October 2010 ABSTRACT Different types of bacteria in various forms are found all around us, and it is a microbiologist’s job to be able to identify these bacteria. Using various staining techniques and physiological tests, an isolated bacterium can be identified. In this experiment, a single bacterial colony was isolated form Mycorrhizal spores, and further...

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Acidophile Bacteria

species abilities and the positive effects it has on humans and other existing mammals. Acidophillic extremophiles exist as two types of broad categories: Archaea and Bacteria. Lactobacillus acidophilus, or largely classified as lactic acid, is known as a genus of bacteria able to produce lactic acid. Lactobacillus is a rod shaped bacteria that grows in the absence of oxygen. Lactic acid uses lactose to produce energy and use that energy to displace lactose through the cells membrane. This extremophile...

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Isolation of Bacteria

Isolation of Bacteria in our Physical Environment Introduction: The purpose of the lab is to apply what has been learned so far in Microbiology, and use it to collect and examine microbial species from the physical environment. The physical environment around the lab will be utilized to find out the variety of different microbial species growing in and around the lab. This investigation will help in preparation for the individual projects that will be done at the end of the semester. Materials...

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Bacteria Morphology

disadvantages? The advantages of using 70% alcohol? The disadvantages? 70% alcohol mixtures are capable of killing most bacteria within five minutes. However, the mixture is ineffective against spores and has limited effect on viruses. Additionally, the 70% alcohol is flammable. The sodium hypochlorite in bleach denatures proteins in microorgamisms therefore effectively killing bacteria, fungus, and viruses. It works quickly and is inexpensive. The downside is that bleach irritates mucus membranes, skin...

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Lab: the Bacteria Around You

Lab: The Bacteria Around You James Brunet Ms Owen October 14th, 2012 Part 1 Purpose To culture and observe the various types of bacteria found around Canterbury High School. Materials and Methods Refer to pages 422-425 of Biology 11 McGraw-Hill Ryerson and the handout “Gram Staining Procedure”. Observations Table 1: Locations of Bacteria Samples Quadrant | Location of Sample Obtained | 1 | Floor | 2 | Water fountain head | 3 | Auditorium Chair | 4 | Inside of Boys’ Bathroom...

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Anaerobic Bacteria

Livja Koka Anaerobic Bacteria In this experiment the purpose is to seek understanding between an organism and its use of oxygen. Oxygen is a very important part of the organisms’ survival. Oxygen has a tendency to form very reactive by-products inside a cell. These by-products create havoc by reacting with protein and DNA, thus inactivating them. Cells that are able to live in the presence of oxygen have evolved enzymes to cope with H2O2 and O2- and thus are not inhibited by O2. Also many anaerobes...

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Bacteria Colony Appearance Morphology

be similar to the pictures below. (In these examples, the time after plating is different for the two samples, so be aware that the colonies in these photos are different sizes for a reason.) We will culture our bacteria for about 2-7 days. Characteristics are most visible if the bacteria are examined using a stereoscopic scope. E. coli Shape (form): circular Margin: entire Elevation: raised Size: punctiform, small Texture (surface): smooth Appearance: shiny Pigmentation: nonpigmented (colorless)...

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Bacteria Transformation in Biotechnology

Abstract Some bacteria are able to go through transformation making new combinations of genes. Transformation is a way of gene variability in bacteria. This experiment is based on the transformation mechanism of bacteria and gene regulation. The bacteria used for the experiment was Escherichia coli and the genes introduces for the transformation were: gfp and bla by a pGLO™ plasmid. After the insertion of the target genes and growing the bacteria on specialized LB media, it could be seen that the...

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Bacteria and Fungi Research Paper

What are bacteria? Bacteria are very different from viruses. First of all, bacteria are much larger in size. The largest virus is only as big as the very smallest bacterium (singular for bacteria). But bacteria are still microscopic and cannot be seen with the naked eye. They are so small that the sizes of bacteria are measured in micrometers (10,000 micrometers = 1 centimeter). By comparison, the head of a pin is about 1000 micrometers wide. Though more complex than a virus, the structure of a...

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Bacteria and Growth Temperature

Microbiology, 2002. vol.3. Temperature and bacteria The lowest temperature at which a particular species will grow is the minimum growth temperature, while the maximum growth temperature is the highest temperature at which they will grow. The temperature at which their growth is optimal is called the optimum growth temperature. In general, the maximum and minimum growth temperatures of any particular type of bacteria are about 30°F (-1°C) apart. Most bacteria thrive at temperatures at or around that...

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Factors Affecting the Growth of Bacteria

| |Factors affecting the growth of bacteria | Introduction: Bacteria make up a large domain of prokaryotic microorganisms. And how can be bacteria destroyed? Antibiotics are widely used in the prevention and treatment of infectious diseases. Antibiotic is a substance, such as penicillin or streptomycin...

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The role of bacteria in soil

The role of bacteria in the soil Bacteria in the soil play key role in recycling matter in to useful nutrients which can be used by growing plants. This process of recycling matter in the soil by living organisms is called biogeochemical cycle. Bacteria are improving plants growth in other ways too, for example bacteria, such as Rhizobium, are in symbiotic relationship with the root system of some terrestrial plants. The most important elements, which allow terrestrial plants grow...

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Effects of Different Antibiotics on Bacteria

Effects of Different Antibiotics on Bacteria Because of their small size, rapid rate of reproduction, and relatively simple structure, bacteria are excellent subjects for laboratory studies. This investigation will introduce you to techniques of microbiology that will be of use to you throughout your biological work. Procedure 1. Heat the test tubes of sterile agar medium in the water bath until the agar melts. 2. Remove the test tubes from the water bath. Let them cool enough to hold in your...

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Evolution of Plague Bacteria

Sarah Burns Evolution of Plague Bacteria The Bubonic Plague otherwise known as the Black Death, has gotten most of its attention from medieval paintings, poetry, and journals of revulsion. The real horror, was the disturbing biological evidence of the bacteria that caused all the pandemics, known as Yersinia pestis. The pathogen got its name from the two investigators Yersin and Kitasato. In 1894, Yersin was known as the main investigator (ergo. Named after him), he claimed that the mice/rats were...

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Effect of Bacteria to Human Body

This article is about the microorganisms. For the genus, see Bacterium (genus). For other uses, see Bacteria (disambiguation). Bacteria Temporal range: Archean or earlier – Recent Scanning electron micrograph of Escherichia coli bacilli Scientific classification Domain: Bacteria Phyla[1] gram positive/no outer membrane Actinobacteria (high-G+C) Firmicutes (low-G+C) Tenericutes (no wall) gram negative/outer membrane present Aquificae Deinococcus-Thermus Fibrobacteres–Chlorobi/Bacteroidetes...

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Bacteria a Helpful Organism

micro-organisms that are in the human digestive system. Article of choice, (Adnan, 2010) Benefits of Microorganisms to Humans, Retrieved February 8, 2013. This article was of interest because there are many bacteria that we encounter in our daily lives and it was informative to know that all bacteria is not bad. In fact, there needs to be a balance between the two and by educating yourself with the smallest amount of new information is very helpful. Humans rely on micro-organisms for a variety...

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Oxygen Requirements of Bacteria

Oxygen Requirements of Bacteria BACKGROUND  The GasPak system is useful for culturing anaerobic bacteria on standard microbiological media because the GasPak generates carbon dioxide and hydrogen. The hydrogen will combine with oxygen present in an anaerobic jar to produce water. This system can reproducibly attain oxygen levels in the parts per million range if used correctly. This is the best method for determining the oxygen requirements of unknown organisms.  A candle jar is useful...

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Francesca Firmin Bacteria Nvq

differences between bacteria, viruses, fungi and parasites. Answer to 1.1 – The difference between bacteria, viruses, fungi and parasites are: BacteriaBacteria is a single celled organism, bacteria have evolved to be in any environment and can be found in any substance/surface and also in the human body, only 1% of bacteria is actually harmful. It’s bad or infectious bacteria that causes illness as they rapidly reproduce and produce a toxin that kills or mutates cells, bacteria is also self-sufficient...

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Bacteria and D. Energy E.

contain DNA c. they require energy and raw material input d. they are made of multiple cells e. All of the above are true 10. Which domain(s) is(are) made up of organisms without nuclei? a. Archaea b. Bacteria c. Eukarya d. both Bacteria and Eukarya e. both Archaea and Bacteria 11. The principal point of the Darwinian theory of evolution by natural selection was that a. Long-term heritable changes in organisms are caused by use and disuse. b. Mutations are caused by all sorts of...

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The difference between bacteria

difference between bacteria, viruses, fungi and parasites are: Bacteria are single celled organisms that can rapidly multiple themselves every 10 minutes up to 10 times each bacterial cell, but they do not live or reproduce in a human cell. When threatened they will make a copy of their DNA to enable them to come back to life in the right conditions. They are able to survive in most extreme living conditions including with and without oxygen, there are various types of bacteria such as Cocci/Coccus...

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Bacteria and Actual Living Organism

in some types of the atoms. Carbon atoms and hydrogen atoms combine to make organic compounds. These organic compounds have carbon, oxygen, nitrogen, and hydrogen in them. The three domains are archaea, bacteria, and eukarya. All the life on earth is put into these three types of life. The bacteria and archaea are different groups of organisms which have prokaryotic cells. The eukaryotes are divided into smaller categories which are called kingdoms. These kingdoms are broken into three the plantae...

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Bacteria Morphology LAB2

 Bacteria Morphology April 2, 2015 Abstract – The Purpose of this exercise is to gain experience in bacterial morphologies in prepared wet-mounted slides and interpreting the findings of bacteria through direct and indirect staining technique. Hypothesis – The experiment will allow for further insight into stained organisms, allowing extended contrast, differentiating shape and structure through utilization of microscope. Procedure – Instructions followed as per procedure...

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Flesh-Eating Bacteria

“horror” and some call it “the super germ”, but now, our always known “regular” bacteria, those one-celled creatures once considered under control with antibiotics, have invaded our hospitals and headlines with a vengeance. The vengeance used against us is caused by an existing organism called necrotizing fasciitis, the so-called flesh-eating bacteria, caused by Group A streptococcus. What this organism does is progressively destroy the human body tissue all the...

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Observing Bacteria and Blood

MBK – Lab Report Name: _Bri White_________ Section: ___________________ Observing Bacteria and Blood Questions: A. List the following parts of the microscope and describe the function of each A- Eyepiece: Viewing and identifying objects within the viewing field B- Main Tube: Connects eyepiece lenses to objective lenses C- Nosepiece: Holds objective lens and rotates them D- Objective Lens: Provides different focal lengths E- Stage: Holds the specimen or slide F- Diaphragm:...

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Bacteria and Degrees Celsius

sterile swab obtained sample of bacteria from skin then transferred using the aseptic transfer technique into the sterile media. Incubated both specimens for 48 hours observed and recording results of growth at 24 and 48 hours. After observing final growth pattern at 48 hours prepared both wet mount and direct stain slide for each of the cultures. Viewed under microscope using both the 40X and 100X oil immersion lens. Disinfected work area. Observations: |Bacteria ...

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The Role of Agarase in Agar-Degrading Bacteria

The Role of Agarase in Agar-Degrading Bacteria Abstract Agar-Degrading (agarolytic) Bacteria is physiological class of bacteria capable of utilising agar as a sole carbon source. This ability is made available by the use of agarases - enzymes which break down agarose into oligosaccharides. This physiological class branches through genii, regardless of Gram Stain status or morphology. Through a review of scientific literature we can find identification methods, optimum conditions and the...

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Bacteria and Living Organism Parasites

IC02 Causes and Spread of Infection 1. Understand the causes of infection 2.1 Identify the differences between bacteria, viruses, fungi and parasites. Bacteriabacteria are extremely small singular organisms which are found almost everywhere. Viruses – it is a coated genetic material that invades cells and use’s the cells apparatus for reproduction. Fungi – it is a multi-celled living organism Parasites – they are types of living plants and animals that derive benefit...

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Bacteria Cell Sturcture

repositories of bacteria/microbes ⁃ borne sterile ⁃ microbe on all surface area of the body ⁃ sterile areas: eyes, brain, spinal cord, bones, kidney, internal organs ⁃ mutualistic relationship: we provide site and nutrient and microbes provide vitamin, aid in food digestion ⁃ division of microbial world ⁃ living component: organism ⁃ prokaryotic ⁃ nucleoid area ⁃ one circular chromosome ⁃ non-membranous organelle ⁃ cell wall: peptidoglycan ⁃ binary fission ⁃ bacteria simple, dynamic...

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Gene Complementation in Bacteria

Lecture 14 Lecture Gene Complementation in Bacteria In order to perform tests for dominance or for complementation in bacteria we need a way to make the bacteria diploid for part of the chromosome. To do this we need to consider a different extrachromosomal element: Ori T The F plasmid (length 105 base pairs) Tra genes There are some special terms to describe the state of F in a cell: F– refers to a strain without any form of F, whereas F+ refers to a strain with an F plasmid. F, ...

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Waterborne Diseases and Bacteria in Tap Water

diseases can kill many people that are drinking water on the tap water and mostly on the drinking fountain; people might drink on a drinking fountain which is dirty because of the different people that are drinking and spiting their saliva on to it, bacteria can easily contaminate the water that is coming out from the drinking fountain. Bacteria’s are also found everywhere in the surroundings; even the sink in our home might have bacteria’s because of the dirty place, and in the school also have bacteria’s...

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Bacteria Shape and Size

effective in killing bacteria, fungus, and viruses. Household bleach works quickly and is widely available at a low cost. The disadvantage is could irritates mucous membranes, the skin, and the airway. It also decomposes under heat or light and reacts readily with other chemicals. Bleach solutions begin to lose its effectiveness after 2 hours. You will need to make a fresh solution for each experiment. The advantage of the 70% alcohol mixtures is capable of killing most bacteria within 5 minutes of...

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Bacteria and Acidic End Products

is. Each color changed or reacted gives a certain digit leading to a five-digit code. Summary & Conclusions: Enterotube II identifies Enterobacteriaceae. The Enterotube II is a multiple test system designed to identify enteric bacteria based on Glucose, Adonitol, Lactose, Arabinose, Sorbitol, Dulcitol fermentation, lysine and Decarboxylation, Sulfur reduction, Indole, Acetoin production of glucose fermentation, Phenylalanine deamination, Urea hydrolysis, and Citrate utilization...

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Microbiology: Bacteria and Fresh Yogurt Slide

observing various bacterial shapes and their arrangements in different types of specimens of bacteria. The microscope parts and capabilities were clearly identified and used successfully and the bacteria were clearly illustrated showing the bacterial shapes and arrangements with all the appropriate magnification being utilized. Through various magnifications using 10x, 40x and 100x oil immersion lenses, the bacteria specimens, along with fresh and prepared yogurt, demonstrated full visual optical views...

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The Effect of Heat and Growth on the Survival of Bacteria

Aims The purpose of the two experiments was to determine the fundamental effects that temperature has on the growth and survival of bacteria. During the first experiment five different bacterial broth cultures of Escherichia coli, Pseudomonas fluorescens, Enterococcus faecalis, Bacillus subtilis and Bacillus stearothermophilus were individually incubated at temperatures of 5, 25, 37, 45 and 55°C for one week in an aim to distinguish the effect temperature has on growth and survival of the five different...

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disinfectant and antibiotics effect on bacteria method

time) 3. Clean your surface with disinfectant to sterilise your lab work surface, this will prevent contamination but leave the disinfectant to stand up to 4 minutes so it can penetrate the harder capsules of some bacteria. 4. Using a sterile pipette with draw some of your bacteria culture from the bottle making sure you flame the neck of the bottle to keep the procedure sterile. Place what you have withdrawn on to an agar plate. 5. then get your glass sterile spreader out of the packet making...

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Identification of Bacteria: Catalase Test

From the other perspective, coagulase test is used to identify microorganism among the Staphylococi member. Among Staphylococi member, S. aureus present with the capability to produce coagulase enzyme in which can promote clotting of serum when the bacteria are incubated with plasma. CONCLUSION Based on this experiment, Staphylococcus members showed positive result for catalase test while only Staphylococcus aureus was positive on coagulase test. REFERENCES Anonymous. Retrieved from...

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Penicillin: Bacteria and Considerably Shorter Lifespan

scientist”. He was researching a culture of staphylococcus aureus, a pathogenic bacteria, and left for a two week vacation. When he returned he observed that the specimen was contaminated by a species of penicillium and the penicillium prohibited the growth of the staphylococcus aureus (Wong). Fleming decided to further his research and discovered that this mold was capable of killing a wide range of harmful bacteria. He published his findings in the British Journal of Experimental Pathology, where...

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Observing Bacteria and Blood- Lab #1

Title: Observing Bacteria and Blood- Lab #1 Purpose: Being able to learn how to correctly use a microscope and the oil immersion lens to be able to see the prepared slides. Also to learn how to prepare my own yogurt and blood slides. Procedure: First, set up the microscope. Clean the ocular lenses and objectives with lens paper. Then pace the prepared e slide on the stage and make adjustments. Turn the rotating nosepiece until the 10x objective is above the ring of light coming through the slide...

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How do bacteria affect human lives

How do bacteria affect human lives? Bacteria interact and are a constant in our day to day lives, perhaps more than suspected. Bacteria are often thought of as bad, however this is untrue, there is also many types of ‘good’ bacteria. ‘Good’ bacteria can benefit us by simply helping our digestive system work and helping us in the process of fermentation. Bacteria are extremely helpful in the production of many things such as fuel and medicine. But bacteria directly affect our production of...

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Fun Dialogue Essay on Basic Bacteria Knowledge

Explaining Bacteria Alexandra Solorzano 1E “ Hey Alex. Could you help your cousin with his homework?” “Okay, but I don’t understand what could be hard about fifth grade homework. Anyways, what are you learning about George?” “Well today my teacher started to talk about these things called Blackmeria? Or what is backferium?” “Umm I think you mean bacteria?” “Yeah! That’s it!” “Then I guess it’s your lucky day because right now in STT I’m in Cell Biology and we started to look into Bacteria too. Tell...

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Differences Between Plasmid and Chromosomal Dna in Bacteria

BETWEEN PLASMID AND CHROMOSOMAL DNA IN BACTERIA. Eukaryotes have two or more chromosomes, prokaryotes such as bacteria possess a single chromosome composed of double-stranded DNA in a loop. DNA is located in the nucleoid of the cell and is not associated with protein A plasmid is an extra-chromosomal DNA molecule separate from the chromosomal DNA which is capable of replicating independently of the chromosomal DNA. Plasmids usually occur naturally in bacteria. A chromosome is an organized...

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“Fighting Invisible Killers” Scholastic Scope: The Language Arts Magazine January 2014 Edition, pages 5-9 Bacteria surround us every day. These little “bugs” are invisible to the eye and most do not harm us. Many are necessary for us to survive, like the bacteria in our stomachs and intestines that help us to digest food. But some bacteria are very dangerous to us. Addie Rereich became very sick in May 2011, when she was 11 years old. What started as something that her doctors and mother...

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Bacteria Friend or Foe?

Bacteria are the most ancient life forms, most bacteria are so small that under a light microscope you can only see them as little dots. Some groups however grow to larger sizes and have spectacular shapes (1). Bacteria are present in most habitats on the planet, growing in soil, water, acidic hot springs, radioactive waste, and deep in the Earth's crust, as well as in organic matter and the live bodies of plants and animals (2). Bacteria is mostly thought of as a pathogen, while it is true that...

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Using Kanamycin Resistance Bacteria to Find the Sources of Contamination of Three Chicken Farms

Using Kanamycin Resistance Bacteria to find the Sources of Contamination of Three Chicken Farms Introduction: Kanamycin is a common antibacterial that interferes with bacterial growth, by inhibiting protein synthesis, and causing the mistranslation of mRNA. Kanamycin is commonly used in chicken feed to keep harmful bacteria from getting into the eggs and producing healthier chickens. Recently reports of severe gastroenteritis have been linked to eating raw or undercooked eggs. This has led to...

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Unknown Bacteria

a universal method of identifying bacteria allows for all scientists from any part of the world to identify the same species in an identical manner allowing for a precise of classification. Bacteria are distributed throughout the world in almost every conceivable habit. Bacteria are unicellular microorganisms, with variable shapes and nutritional needs. They lack a distinct nucleus and occur singly or in chains or clusters and form distinct colonies. Bacteria are classified on the basis of many...

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Sciece Fair Essay: Bacteria That Grow in Spoiled Goats Milk, Sheeps Milk, Skim Milk, and 2% Milk

Bacteria that Grow in Milk Jennifer Beagley and Katie Anderson Starr’s Mill High School 193 Panther Path Fayetteville, Georgia 30215 10th Grade Table of Contents 1. Abstract 15 2. Introduction 1-3 3. Materials 4 4. Procedures 5-6 5. Results 7 6. Discussion8-9 7. Conclusion 10 8. Acknowledgments 11 9. Bibliography 12 10. Appendix 13 11. Forms 14 Introduction The type of bacteria found in milk can help society in many ways. For example, if testing...

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Bacteria and Penicillin

Penicillin Changed the World Imagine life without antibiotics, people dying of a whooping cough, a minor wound or even a simple infection. Until the accidental discovery of penicillin by Alexander Flemming, life was like this. The positive effects for the discovery of penicillin were the many medical advancements made both therapeutically and medicinally. Economically, people were living longer lives and populations were growing more rapidly. Socially, people were able to interact without risking...

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P1: you must explain how infections are caused by, bacteria, viruses, fungi and parasites.

P1: you must explain how infections are caused by, bacteria, viruses, fungi and parasites. P2: you must explain how pathogenic microorganisms grow and spread. In this assignment I am going to explain how infections are caused by, bacteria, viruses, fungi and parasites. I will then explain how pathogenic microorganisms grow and spread. Infection is the process where germs enter a susceptible area in the body, where they multiply, resulting in disease. Colonisation is where microbes are present...

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Identification Od Unknown Bacteria

The Identification of Two Unknown Species of Bacteria in Tube #72 Introduction: There are many reasons for knowing the identity of microorganisms. The reasons range from knowing the causative agent of a disease in a patient, so as to know how it can be treated, to knowing the correct microorganism to be used for making certain foods or antibiotics. This study was done by applying all of the methods that have been learned so far in the microbiology laboratory class for the identification of an...

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Unknown Bacteria Lab Report

METHODS The two streak plates made from the mixture of unknown bacteria showed two different colony morphologies. Colonies of Bacteria A were translucent in color, circular in form, with entire margins and a smooth surface. Colonies of Bacteria B were cream colored, irregular in form, with undulate margins and an umbonate surface. Two different morphologies allowed Gram stains to be performed on each of the bacterium. Gram staining of Bacteria A revealed pink, rod-shaped cells signifying that the bacterium...

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Lab 5 Coliform Bacteria and Surface Water

LAB 5: Coliform bacteria in surface waters I. Introduction Many organisms, including humans, have symbiotic bacteria in their guts that aid digestion. Symbiosis is an intimate relationship between different organisms in which both the host organism, e.g. the human, and the symbiote, e.g. bacteria, benefit from each other. In this case, the bacterium gets a favorable environment and food source in the intestines of a human. In return, these bacteria improve the digestibility of food through...

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