.a. It could be seen that there was a difference in the patterns between the untreated, 70 degree treated, and autoclaved samples. In the untreated control area the colony is composed of several closely packed moderate sized colonies; they are white in colour, opaque, raised, circular, with the outer ridge of the mass of colonies being somewhat irregular in shape. For the 70 degree treated sample the findings were about the same; moderate sized colonies, white in colour, opaque, convex, circular, with the outer edge of the mass of colonies having an irregular shape. The biggest difference was seen the autoclaved sample, as this sample had little to no colonial growth. What can be observed are some small irregularly shaped colonies, which are …show more content…
A physical kind of antimicrobial treatment is the heating of milk for pasteurization, increasing the shelf life of milk by reducing its overall microbial load. This method is the best because it does not add anything to the milk. A strong chemical for antimicrobial treatment is the preservation of meat or other food through preservatives. The presence of nitrates or high sodium content can cause foods to keep much longer and kill off addition microbes which attempt to form on the product, this is beneficial to other methods as you do not need to physically alter the product with heat or other physical changes which causes changes in the composition of the product. Broad spectrum antimicrobial agents are good for things such as hand sanitizer, one would want to antimicrobial agent which affects as many different strains of bacteria as possible. Narrow spectrum antimicrobial agents would be good if a particular bacteria which was know to be effected by this agent was being experimented with, this is better for emergency situations such as some of the agents which can combat anthrax.
6. There are bacteria everywhere but we do not get sick from them all the time due to our immune systems. Our immune systems are constantly fighting intruders in the body that can be considered hostile. Once the bacteria is identified by the body special immune cells literally attack and eat the bacteria. By using the chemical markers which were present in that bacteria the immune cells which identify threats can then be prepared to identify them in case of for another
Bacterial and fungi infections are easy to cure with the use of antibiotics, where as viruses can be hard to cure or vaccinate against, such as the common cold. Bacteria can be found everywhere and anywhere Soil, Water, Plants, Animals, material and even deep in the earth's crust. Bacteria feed themselves by making there food with the use of sunlight and water. We would not be able to live without Bacteria. The human body consists of lots of friendly bacteria which also protect us from dangerous ones by occupying places in the body. Some of the most deadly diseases and devastating epidemics in human history have
For many years the identification of microorganisms has been important in the world of medicine. It is essential or correct disease diagnosis in patients and for proper treatment. Knowing the correct identity and characteristics of microorganism is crucial when disease outbreaks occur in populations, also knowing how humans can benefit from microorganisms is important; many can be used in making certain foods or antibiotics.
Imagine the bacteria as robbers trying to invade a house, the body in this analogy. The immune system is the police officers in charge of the house, and the meninges are the alarms around the point of the house that the robbers want to come in through. The robbers trick the police officers into helping them rob the house. The robbers used the police officers, originally intended to do good.
Microbes are everywhere and anywhere. Microbes can be found from on surfaces of our daily lives to microbes we encounter and spread on. Microbes have been always since life started in this planet. According to a BBC article about Earth, “…an older microbe came to light…to be a remarkable 3.5 million years” (BBC). As stated, microbes may be considered to have been here long before any other living organism, which means these microbes have evolved through time as well. With evolving comes the different types of bacteria that may benefit us and also harm us. Harmful bacteria such as Lyme disease and the Plague which both derive from an infected insect with different bacterium. These two different disease made different approaches to our history
Bacteria are single-celled microorganisms that have been around on planet Earth for over 3.5 billion years and are found everywhere and anywhere you touch. Some bacteria can be healthy to the human body while some can “attack” and cause infectious diseases to be spread. Most bacteria located on surfaces are the cause or starting point for the majority of common illnesses. For example the flu, cold, gastrointestinal disease (diarrhea, stomach flu, salmonella infection), streptococcal infections, and meningitis. The most common place to spread germs can be in schools, offices, and other public places where multiple people have contact with objects. So, that is why it is important to decrease amounts of bacteria on surfaces to prevent the spread
This entire book gives as much information as possible without the reader needing a medical degree. It gave an in depth look at the formation and the ability of bacteria to live within the body and outside the body and how the body actually collects the bacteria. From attaining bacteria from the
Narrow-spectrum drugs are effective against a select few kind of pathogens. The advantages of these kind of drugs include:
Antiseptics play an important role in preventing microbial growth and killing microorganisms. They are used in many fields such as healthcare fields and hospitals as agents to prevent infections. To observe the effectiveness of disinfectants and antiseptics on certain organisms you would use the Kirby-Bauer. The Kirby-Bauer is used as disk diffusion method as seen in Figures 1 and 2. This experiment used filter discs that were immersed in the antiseptics and were placed on the Tryptic soy agar plate containing the organism to test the antibiotic susceptibility. This test is used to discover what antiseptics should be used to treat infections. The zone of inhibition is when bacteria who are vulnerable to the specific antiseptic form a clear
Antiseptics are antimicrobial substances used on living tissue to reduce the possibility of infection, putrefaction or sepsis. The word “anti” is for against and the word “septic” is for infection. Antibacterial products are antiseptics that are proven to act against bacteria. Bacteria need a food supply, moisture, a certain temperature, a certain level of acidity and in most cases
There are many reasons for knowing the identity of different microbes when presented with them. The reasons include identifying the causative agent behind the disease in a patient, understanding how it can be treated, as well as knowing the microbe that should be used for making the right antibiotics. With this being said, their correct identification is not only significant in a microbiology lab but also in the medical, manufacturing, and pharmaceutical fields. The first test used in the identification of unknown bacteria numbers 3 and 4 was the Gram stain, which was used to differentiate between gram-positive and gram-negative bacteria based on their different cell wall elements. The Gram stain procedure distinguishes between
When observing the plates, only the individual colonies are observed, but not in the areas where the bacteria were closed together. From the both technique of streaking and spreading, E. coli was spread and streaked on Nutrient Agar and MacConkey agar respectively. The characteristics of colony morphology for E. coli were shown in the table 3 above. Moreover, the characteristics of colony morphology for Klebsiella were same as that for E. coli. They have pink which indicate lactose-fermenting and non-shiny colonies. The arrangement of the colonies is not due to the bacteria themselves, but to how we streaked them on the
Microbial life can be found everywhere like oceans, soil and buried deeply under the earth or even inside our body. This micro-organism are very tiny and can barely see with our naked eye. Microbes can have a negative and positive impacts in the society. First example is “Bacteria” a tiny and millions creatures alive and can be found anywhere and could be dangerous if spread badly and got infected. Sometimes we are scared or paranoid about bacteria or germ because it can give us illness or can spoil our food. Other example after eating a contaminated food we get sick is just because we had eaten a little bit of bacteria but if not cure this bacteria can multiply a million times inside our body because our body is warm and moist that bacteria perfect place to multiply. But not all bacteria are harmful in (Stanford University School of Medicine) some bacteria are used to make medicine, a specially modified bacteria or transgenic bacteria. These bacteria have a foreign genes along with their DNA they live and reproduce just like any other bacteria and they help by producing human protein that use in vaccines and medicines. Others put inside the capsules for us to take to fight the bad bacteria inside our body that capsules coated with protective often slimy coating to protect the bacteria inside. Second example is “Virus” a tiny piece of infectious and smaller than bacteria and need living organism just to reproduce. And can infect any alive micro-organism such us animal, plants and even bacteria and algae. Virus exists for the reason is to reproduce and if landed into appropriate cell they start to action. Other people said ones man cold could be other people nightmares. (Bhagirath Singh of director of infection and immunity CIHI) say if this viruses stay in our body for so long it most likely to develop long term chronic disease and it can be fatal for human. According to (Food and
The pollution, the change in weather, and the new inventions, technologies, that we face in our daily life allows bacteria and infections to get into our
In “The Germs of Life,” by Lynn Margulis and Emily Case talks about how bacterium has live for about 3.8 billion years because it has been able to adapt in any environment. Therefore, it has been able to live for a long period of time. It goes on saying how not all bacterium is bad there some that benefit us like the bacterial nitrogen fixation help the dirt have nutrients. Furthermore, the cyanobacteria that helps photosynthesis to be able to create the nutriments that are needed for all living things. In addition, bacteria has been taken out from a lot of the things we now used for example, in soaps, creams, mouthwash, and food of course and become antibacterial. People feel safer knowing its antibacterial, but they do not know that bacteria
Based on the t-tests between 12°C and 49.5°C, it is determined that the percent coverage of bacteria increases whereas the number of colonies decreases. In the t-Test of the percentages of bacterial growth, the t-Stat value of 11.6 is larger than the critical value of 1.69, and in the t-Test of the number of colonies of Bacillus subtilis, the t-stat value of 8.90 is greater than the one-tail critical value of 1.69, presenting that the null hypothesis should be rejected in both cases. Although the number of colonies decreases, the size of the colonies increased as temperature did, further revealing that there is correlation between temperature change and