Bacteria Essays

know, bacteria is a very complex organism and the subject can be very broad. In this essay, the focus will be on bacteria and the bacterial cell structure. Different forms of bacteria, its pros and cons, the cell structure, diseases and resistance will be explained and listed. First bacteria and cell structure is explained, and then moving on to different bacterial forms and diseases, and how diseases can be prevented or even cured. Then finishing the essay will be the conclusion. Bacteria The

Bacteria is one of the first life forms that appeared on Earth, and that today lives essentially in all environments of the world whether an individual is aware or not. It takes many different shapes, but the most common are spiral, rod and spheres. Bacteria cannot be viewed with the naked eye; instead you need a microscope and are extremely small measuring in at 0.2um in diameter and 2-8 um in depth. In the science world bacteria is among the topics of controversy and many question if in fact

The living organisms are classified into different groups by means of their differences and similarities. Two of the major/ most important groups are the prokaryotes (Bacteria and Archaea) and eukaryotes (from plants, animals till malaria parasites and fungi). The difference between them is that eukaryotic cells contain membrane-bound organelles, such as the nucleus, whereas the prokaryotic cells don’t. There is also a difference in their cellular structure due to the lack of chloroplast, cell wall

effectively each antiseptic killed the E. Coli bacteria. For the control cultures we saw no decrease in E.

Biology research project Introduction Bacteria are everywhere some harmful and others not, without bacteria the world would be nothing. In this research paper I will be discussing bacteria, anti-bacterial agents, pros and cons of bacteria and my conductive experiment on the growth and the killing of bacteria. Bacteria are single cellular organisms that most commonly reproduce through means of binary fission. They were first discovered

They may be a bacteria, virus, fungus or a parasite. Many of the bacteria are a part of the normal body flora and inhabit various areas in the body such as the oral cavity, nose, skin, nasopharynx, oropharynx, gastrointestinal tract, genitalia, urethra, vagina as well as the external ear. These organisms most of the time are non pathogenic, but in some cases especially in immunosuppressed patients, they may cause diseases. Bacteria that can cause infection are called pathogenic bacteria. Examples

The presence of bacteria and pathogenic organisms is a concern when considering the safety of drinking water. Pathogenic organisms can cause intestinal infections, dysentery, hepatitis, typhoid fever, cholera, and other illnesses. Sources of Bacteria in Drinking Water: The Need for Water Testing Human and animal wastes are a primary source of bacteria in water. These sources of bacterial contamination include runoff from feedlots, pastures, dog runs, and other land areas where animal wastes are deposited

Bacteria is a serious issue people all around the world face today, and it is an issue that needs to be discussed. Bacteria is smart and dangerous. It has the ability to change into diffrent forms. In fact, according to article "Doctors Enlisted to Turn the Tide on Antibiotic Resistance" and "A Spray That Stops Bacteria From Talking to Each Other Could Reduce Dependence on Antibiotics" some microbes are changing faster than antimicrobials can kill them. As a result, people can contract a bacterial

Contamination with pathogenic bacteria from the human/animal reservoir can occur when the landing place is unhygienic or when the fish are washed with contaminated water. Upon the processing of fish, its exposure to water is a critical part as pathogens may be present in the water used which can cause contamination and spoilage (Shoolongela & Schneider, 2012). Contamination of food can occur because of problems in food production, preparation, storage or cooking. The aquatic environment and soft

Counting the bacteria means determining the number of bacteria in a specific sample. There are many ways that we can use to count the microorganisms, one of which is the plate count. The plate count technique is used to count only the living bacteria by counting the number of colonies.Due to the large number of bacteria, and to be able to count it, the bacteria should be diluted several times and spread on an agar plate. In this way, colonies can be counted. These colonies are called colony forming

In the laboratory, identification of an unknown bacterium is often necessary. In the lab, a random sample consisting of three different bacteria was selected. The sample contained one gram-positive, one gram-negative paracolon, and one gram-negative coliform. The purpose of the experiment is to identify each of the three species that the mixture contained. After receiving an unknown mixture, the sample was streaked for isolation onto TSA, blood agar, and MacConkey plates. Each plate serves as a first

unknown bacteria # 710 broth had to be successfully isolated on an EMB and MAC agar plate. Using aseptic technique by sterilizing the wire loop with Bunsen Burner between inoculations and flaming the opening of the test tubes before inserting in the loop with the bacteria. The streaking technique used was to isolate the colonies on the agar plates. In addition, the streak plates had to be incubated in a upturned position for 24 hours in a hot temperature incubator at 37 degree Celsius. Bacteria need

Hunting nightmare bacteria Answer the following questions Case of Addy (the girl from Arizona ) 1- Based on the pediatrician observations what was Addy’s diagnosis at the Pediatric Hospital intensive care unit ? She had got infected by staff or positive bacteria called Methicillin-resistant Staphylococcus aureus (MRSA). MRSA is a community associated bacteria that infects kids when they are playing in playing ground and getting scabs on their knee.They spread through that wound and

into E. coli bacteria. E. coli bacteria was resuspended in an ice-cold CaCl2 solution. DNA containing GFP and ARG was added to half of the cells before they were “heat shocked” in an ice bath and hot water. The heat shocking made the bacteria’s cell membrane more porous, so the DNA could enter. Recovery broth was added to the cell suspension, and the bacteria was placed in warm water for about thirty minutes (see Results and Discussion, paragraph 2). This recovery period let the bacteria repair their

animals or people. Penicillin, is the first antibiotic that is medically used to fight off a large range of bacterial infection. For this experiment, we will be using ampicillin, it is a part of the penicillin drug group. The ampicillin inhibits the bacteria with the result of killing the bacterium or prevents it from multiplying. “When a bacterium multiplies, small holes open up in their cell walls as the daughter cells divide. These holes are then backfilled with newly produced peptidoglycans and the

polymicrobial, typically dominated by obligatory anaerobic bacteria. The most commonly isolated microorganisms before root canal treatment include Gram-negative anaerobic rods, Gram-positive anaerobic cocci, Gram-positive anaerobic and facultative rods, Lactobacillus species and Gram-positive facultative Streptococcus species.83 The obligate anaerobes are rather easily eradicated during root canal treatment. In contrast, facultative bacteria such as non-mutans Streptococci, Enterococci, and Lactobacilli

of Three Medicinal Plant Extracts from Duba Province Tabuk, Saudi Arabia on some Human Pathogenic Bacteria Abstract: Three seed extracts of coffee (Coffea arabica), black cumin (Nigella sativa), and date palm (Phoenix dactylifera) plants were purchased from local market in Duba province, west Saudi Arabia were assayed for the in vitro antibacterial activity against three human pathogenic bacteria viz Klebsiella pneumoniae, Psuedomonas sp, and Escherichia coli using hole plate diffusion method

the lab was to put into action the methods that have been learned in the laboratory to determine our unknown bacteria. Bacteria’s can have different features, shapes, and or arrangements that help microbiologist determined their role in our life (whether they are good or bad for humans). Bacteria can be classified as gram positive or negative (difference in call wall). Gram positive bacteria have a thick cell wall of peptidoglycan (“polymer of disaccharides cross-linked by shorts chains of amino acids”)

fixing bacteria from rhizosphere Hypothesis: Rhizospheric Nitrogen fixing bacteria show optimal growth at PH: 6-7, Temperature: 30 °C and Salinity level: 0.005 – 0.010M NaCl INTRODUCTION: There is a huge bacterial diversity in rhizospheric soil. Gram-negative, non-sporulating baccilli which respond to root exudates are predominant in the rhizosphere (Pseudomonas, Agrobacterium). While Gram-positive bacilli, Cocci and aerobic spore forming bacteria like

method will be used to answer a specific question. After the question has been posted, the next step is to develop a scientific hypothesis (Stroud 3).” The question that this experiment address is whether or not hand sanitizer will actually kill the bacteria, Staphylococcus epidernidis. The objective was to determine if hand sanitizers inhibit the growth of S. epidermidis and to see if it is effective. Materials & Methods “The experimental design should consist of two groups: The control group and