1. How is UV radiation a good type of control mechanism against microbial growth? Please explain what happens to the microbe and effects this control causes.
Q: You are working in the lab with Streptococcus pyogenes and two other bacteria. You streak all three…
A: The basal, enriched, bacterial growth medium, named the blood agar medium encourages the growth of…
Q: 2. How would you expect the staining properties of 24-hour culture of Bacillus subtilis or the other…
A: Note: Ad per Bartleby Guidelines For Remaining Answers Please Repost The Question. Introduction: The…
Q: The first step for directly linking a microbe to a specific disease according to Koch's postulates…
A: The goal of the Isolation of bacteria is to prevent germs from sick or colonized patients from…
Q: Why must m-Endo broth or some similarly selective and differential medium be used to count…
A: Coliform bacteria are described as rod-shaped, Gram-negative, nonspore-forming, motile or nonmotile…
Q: 5. The favorable growing conditions of a microbe is at 37°C and pH 6. Which of the following…
A: Bacteria are classified into various types based on the structure of the cell, growth temperature,…
Q: 1. A term of biologists performed an experiment to determine the effectiveness of a chemical to…
A: Note: As Per Guidelines, We Can Answer One Question At A Time. Ask Again To get rest answers.…
Q: Which of the following is FALSE about interpreting the results of normal microbial flora experiment?…
A: Huge diversity of microbial flora could be found with the skin and mucous membranes of the hosts…
Q: 1. it is sometimes difficult to obtain pure cultures of microbes that grow naturally in mixed…
A: Hello “Since you have asked multiple questions, we will solve the first three questions for you. To…
Q: 2. The following is an incomplete schematic diagram for the isolation procedure used. Label each…
A: Isolation of Micro organisms -- Introduction --The term isolation is defined as separation of a…
Q: Why do you disinfect your work area at the beginning of lab and then again at the end of lab? 2.…
A: Pure culture - In microbiology if one organisms cultured in midium. It is obtained from mixed…
Q: Which type(s) of medium would be used in each scenario?a. isolating the growth of Streptococcus…
A: A culture medium, also called the growth medium, can be a liquid or solid medium that supports the…
Q: Is the Storage media in microbiology is a simple or liquid medium and what is its functional types?
A: Culture media is the substance that is involved in the growth and supports the survival of the…
Q: 1. Why are there so many antibiotic-producing organisms in soils?
A: There are several microorganisms which produces a wide range of antibiotics. Antibiotics are…
Q: d. If you inoculated a TSA plate with 1.0 ml from dilution tube 4, how many colonies would you…
A: 2d) In the initial diagram given, the number of colonies from tube 4, that were formed on the plate…
Q: What factors do you think must be considered when treating an infection present in a biofilm on a…
A: Cytotoxic T cells destroy the target cells that are present on the transplanted tissue, cancer…
Q: 1. The physical factor influencing water entry into and exit from cell interior resulting in…
A: Introduction A pathogenic bacterium, or microbial cell, is a living entity that is too small to see…
Q: 1. What is the mechanism of action of penicillin? 2. Cells treated with penicillin do not die…
A: Penicillin inhibits the cell wall of bacteria by blocking transpeptidase after binding to…
Q: 1. What are the advantages of staining a bacterial preparation before observing it under a…
A: Since you have asked multiple questions, we will solve the first three questions for you. If you…
Q: 1. The differential aspect of MacConkey agar allows for the determination of which bacteria are…
A: selective media allow a certain type of bacteria to grow while inhibits the growth of other…
Q: 22) Which of the techniques/characteristics below may be used to identify a target bacterium in a…
A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…
Q: What microbe, found in the feces of normal humans, can survive freezing but cause disease in a human…
A: Salmonella enterica, bongori, and typhi are bacteria found in animals as well as in human beings to…
Q: 1. How is UV radiation a good type of control mechanism against microbial growth? Please explain…
A: Since you have asked multiple question, we will solve the first question for you. If you want any…
Q: 1. Would a syringe filter with a pore size of 0.22 micrometers be able to completely remove all…
A: Microorganisms can be defined as the type of organisms that are minute and cannot be seen from the…
Q: 6)Which of the following statements is a reason why Acid-Fast Bacteria resist the Gram stain a)…
A: Answer. Staining is a biochemical technique of adding a class-specific dye to a substrate to…
Q: 1. In addition to nutrients Lowenstein-Jensen (L-J) medium (used to culture Mycobacterium species…
A: As per our guidelines, we are supposed to answer only one question. Kindly repost other question as…
Q: A throat and nasal sample are taken from a patient to determine the type of bacterial infection they…
A: Sputum Gram Stain test is a simple laboratory test which allows a doctor to diagnose any kind of…
Q: Some antibiotics show no zone of inhibition against the microbe. How is this possible? Explain how…
A: The zone of inhibition is basically the circular area around the spot of antibiotic in which the…
Q: 3. Based on his findings at the farm, the USDA inspector was also conçerned that the milk could be…
A: The E. coli O157:H7 is the bacterial species responsible for causing disease which typically…
Q: Why are staining methods used in microbiology? Choose all that apply A. Staining results can have…
A: Staining is the course of coloring of a substance artificially to work with assessment of tissues,…
Q: 1) based on the difference in appearance between mixed culture streak plates and broth culture…
A: Hi! Thanks for your question. But as you have posted multiple questions, I am answering only the…
Q: Some antibiotics show no zone of inhibition against the microbe. How is this possible? Explain how…
A: Zone of inhibition The Zone of inhibition, it is a area around the antibiotic drug which inhibit…
Q: How does the streak plate technique help in isolating individual colonies of bacteria? Why streak…
A: NOTE: DUE TO MULTIPLE QUESTION POSTED, AS PER OUR GUIDELINES WE ARE ONLY SUPPOSED TO ANSWER THE…
Q: Which of the following is NOT correctly matched? A. Halophile – microbe that can grow in an…
A: All the above represents match the term questions
Q: 5. The favorable growing conditions of a microbe is at 37°C and pH 6. Which of the following…
A: Microbes are the minute single-celled organisms that are present all around us and are not visible…
Q: What substance is produced by a microorganism that is capable of the growth of other microorganisms?…
A: Since you have asked multiple questions, we will solve the first question for you. If you want any…
Q: Why is heating the inoculating loop so important in microbiology? 2. Why is it that moist heat is…
A: Inoculating loop is a simple microbiological tool which is used by microbiologist to transfer a…
Q: Microbiology, are there technologies that can help make bacterial culture and sensitivity done…
A: The typical bacterial culture and sensitivity test takes around 7 days to give result, which can…
Q: After an antimicrobial drugs test, the following results were obtained from a disk-diffusion test…
A: The antibiotic disc diffusion test is usually performed on an agar plate. The agar plate contains a…
Q: 1. Illustrate in a diagram the identification scheme from gram-positive cocci.
A: Note: We will answer the first question since the exact one was not specified. Please submit a new…
Q: 22) Which of the techniques/characteristics below may be used to identify a target bacterium in a…
A: Bacteria are commonly identified using morphological and biochemical assays, with the addition of…
Q: . Based on E.Coli & P.aeruginosa, which antibiotic would be recommended to use for both microbes &…
A: Kirby-Bauer method of antimicrobial susceptibility testing is carried out on clinical isolates in a…
Q: 1. What kinds of media would be used to culture and Identify this microbe? 2. What are some other…
A: Hi, Thanks For Your Question. 1. What kinds of media would be used to culture and identify this…
Q: How is UV radiation a good type of control mechanism against microbial growth and what happens to…
A: ultraviolet (UV) radiation is a type of non-ionizing radiation that is produced by the sun and…
Q: 2. you do the Kirby-Bauer test on a hypothetical Staphylococcus species with penicillin and…
A: In Kirby-Bauer testing, bacteria are placed on a plate of solid growth medium and wafers of…
Q: 12. A differential media a) allows visual distinction between bacteria to perform a specific…
A: The cells are classified as unicellular and multicellular. The unicellular cells are known as…
Q: 1. In addition to nutrients Lowenstein-Jensen (L-J) medium (used to culture Mycobacterium species…
A: 1. In addition to nutrients Lowenstein-Jensen (L-J) medium (used to culture Mycobacterium species…
Q: The colonies on a negative MSA plate would appear _____________. 2. "E. Coli and S. epidermidis…
A: MSA stands for Mannitol Salt Agar. The MSA plate is often used for halophilic bacterias. Halophilic…
Q: What is the most common sterilization technique used in laboratories?
A: According to the guidelines we have to answer only first question, rest you can ask separately thank…
Q: . Why not test water samples directly for Salmonella typhosa or other pathogens?
A: Salmonella Typhi bacteria infect the blood and intestine of humans. The disease caused by this…
Q: Using your fingers, you are asked to aseptically touch the surface of a sterile agar plate.…
A: The aseptic technique of plating on an agar plate means that a sterile or no infection-containing…
1. How is UV radiation a good type of control mechanism against microbial growth? Please explain what happens to the microbe and effects this control causes.
2. Suppose you do the Kirby-Bauer test on a hypothetical Staphylococcus species with penicillin and tetracycline. You record diameters of 20mm for tetracycline and 24mm for penicillin. Which antibiotic is most effective against this bacterium and why? Please explain and interpret these results.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- 1. How is UV radiation a good type of control mechanism against microbial growth? Please explain what happens to the microbe and effects this control causes. 2. Suppose you do the Kirby-Bauer test on a hypothetical Staphylococcus species with penicillin and tetracycline. You record diameters of 20mm for tetracycline and 24mm for penicillin. Which antibiotic is most effective against this bacterium and why? Please explain and interpret these results. 3. Please provide the scientific name of your microbe that was used in the UV experiment (i.e. S. aureus). Compare your plates and interpret/analyze your results. Please discuss your findings and any patterns you were able to gather. 4. After performing the “Effects of Antiseptics & Disinfectants” lab which agent(s) showed potential to control S. marcescens growth? P. aeruginosa? Please explain why you believe these agent(s) work. 5. What purpose does water serve in the “Effects of Antiseptics & Disinfectants” lab? What did you…You perform a Kirby-Bauer assay with two antibiotics. Antibiotic X has a zone of inhibition of 9 mm. Antibiotic Y has a zone of inhibition of 11 mm. Which antibiotic is better at killing this particular microorganism? Group of answer choices 1Antibiotic Y 2Antibiotic X and Y, which have identical antimicrobial activities 3Antibiotic X4 4It is impossible to tell from the information given(c) Public health scientists wanted to investigate the effect of ionising radiation on the growth of Salmonella typhimurium in the presence of antibiotics. They grew bacterial colonies of Salmonella typhimurium in petri dishes labelled A, B and C. The Petri dishes were kept at 36°C for 48 hours, with scientists observing the bacteria every 24 hours. The results for this investigation are below. Petri dish A B с Treatment Was subjected to ionising radiation followed immediately by a dose of antibiotic X An equal amount of antibiotic X was added (as was added to Petri dish A) Was given neither ionising radiation nor antibiotic X After 24 hours Small spots of growth on surface No growth Growth across whole surface After 48 hours (ii) Identify the purpose of petri dish C. Large spots of growth on surface No growth Growth across whole surface (i) Explain the effect of the ionising radiation on the bacteria. (iii) Explain why scientists must continue to develop new antibiotics.
- The world is facing a Corona Virus (COVID-19) Pandemic and as a potential scientist and a microbiology student, you have been required to prepare the easiest and most affordable hand sanitizer that can be utilized by students in various microbiology laboratories. Each student in your class has been given 96% ethanol and you are required to prepare 70% ethanol hand sanitizer in a 2L spray bottle. Describe clearly the method you will use in order to achieve the aim of the practical.2. You use tubes to test aerotolerance of bacteria. From your samples you have 3 results: A. Bacteria growing on the surface. B. Bacteria growing throughout the tube, the agar shows cracks. C. Bacteria growing about 5 mm below the surface. Please interpret each bacterial result. (Give the bacteria an oxygen classification, explain what classification means and interpret the cracks in the agar.) 3. Please explain how the use of an Eosin Methylene Blue Agar plate can help determine the type of fermenters that bacteria are. Please explain thoroughly.1. The colonies on a negative MSA plate would appear _____________. 2. "E. Coli and S. epidermidis were chosen to represent Gram-negative and Gram-positive bacteria, respectively. For a given antibiotic, is there a difference in susceptibility between the Gram-positive and Gram-negative bacteria?" "No, they are usually similar" "yes, drugs that target the cell membrane are more effective on gram negatives" "yes, drugs that target the cell wall are more effective on gram negatives" "yes, drugs that target the cell wall are more effective on gram positives" how can I tell the difference
- 1. If you expose E.coli to UV light at 30 seconds, 1 minute, 3 minutes and 5 minutes, what are your expected results? 2. If you expose. B. cereus to UV light at 30 seconds, 1 minute, 3 minutes and 5 minutes, what are your expected results? 3. If you do not remove the cover of the plate before exposure to UV light at 5 minutes for E.coli and B. cereus, what are your expected results? Help with 1,2 & 3 pleaseWhich of the following is NOT correctly matched? A. Halophile – microbe that can grow in an environment with high osmotic pressure (e.g., salt) B. None of the other four answers (all are correctly matched) C. Agar – complex polysaccharide from seaweed used as a solidifying agent in culture media D. Colony – a population of microbial cells arising from a single cell or spore or from a group of attached cells E. Capnophile – microbe requiring an elevated molecular oxygen (O2) environment for optimal growth1. Table 1 lists a typical recipe for growing bacteria in the lab. A researcher discovered a potentially new species of bacterium from a soil sample and attempted to grow it in this media. Unfortunately, the bacterium did not grow. Identify at least three components that you suggest adding to the medium to enable growth. Provide a reason for adding each component. Table 1. per 1000 mL 1g Bacteria culture media NazHPO4•7H2O KH2PO4 3g 5 g 1 g 0.4% (wt/vol) 0.2% (wt/vol) NaCl NHẠC1 Glucose Casamino acids
- 1. What is the most common sterilization technique used in laboratories? 2. List at least 5 procedures of the aseptic technique and describe its uses. 3. Why is Gram stain one of the most important and widely used stains in bacteriology? 4. Explain the Gram staining technique in chronological order. Indicate the reagent used and the time of usage on each reagent.How does the streak plate technique help in isolating individual colonies of bacteria? Why streak multiple times on one plate? 3. While observing a plate inoculated with bacteria you observe a white-tan fuzzy growth. What can you interpret from this observation? Explain how this outcome could’ve occurred. 4. What are 3 possible errors that could take place as you culture your samples which could lead to contamination? State 3 and explain why. Microbiology classMethicillin-resistant Staphylococcus aureus (MRSA) is one of the most dangerous organisms that can be encountered in the health care setting. MRSA is often resistant to more than one antibiotic. 1. What does it mean to say that S. aureus is resistant to methicillin? 2. What antibiotic would you choose to combat this micro-organism? 3. What are some clinical consequences for the patient infected with MRSA? Edit View Insert Format Tools Table В І 12pt Paragraph UA T² V fil <