Microbiology: An Introduction
12th Edition
ISBN: 9780321929150
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 7, Problem 3CAE
Summary Introduction
Introduction:
Ralstonia mannitolilytica is an emerging opportunistic pathogen which is present widely in an environment such as soil, plants and water surfaces.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
In sterilization, which among the supplies, instruments, glassware, etc. under the list of materials can be sterilized using either or both equipment below? List them down under the category: a) For “autoclaving” only, B) For Dry heat oven sterilization ,And C) Can be sterilized with either.
Materials:
200-ml Erlenmeyer flask Stove
500-ml Erlenmeyer flask Autoclave
10-mL graduated cylinder Analytical balance
100-ml graduated cylinder pH meter
Spatula Stirring rod
100-mL beaker Test tubes
Distilled water Petri dish
Stirring rod Alcohol lamp
Glass dropper
A batch of turkey rolls (10 lb—approximately 4.5 Kg—each) were cooked to 165°F internal temperature in bags, opened, sliced, vacuum-packaged, and stored at 40°F. The product was expected to have a refrigerated shelf life of 50 days. However, after 40 days, the packages contained gas and approximately 107 bacterial cells/g of meat. The bacterial species involved in the spoilage was found to be Leuconostoc carnosum, which is killed at 165°F. What could be the sources of the bacterial species in this cooked product?
One of the following matches indicatIng early microbial spoilage of pharmaceutical products is incorrect
Select one:
Microbial pigments / Color changes
Amines / Unpleasant fishy smelling and tasting
Fatty acids / Sour taste
Depolymerization of suspending agents / Production of slimy and viscous masses
Chapter 7 Solutions
Microbiology: An Introduction
Ch. 7 - The thermal death time for a suspension of...Ch. 7 - If pasteurization does not achieve sterilization,...Ch. 7 - Thermal death point is not considered an accurate...Ch. 7 - Prob. 4RCh. 7 - DRAW IT A bacterial culture was in log phase in...Ch. 7 - How do autoclaving, hot air, and pasteurization...Ch. 7 - How do salts and sugars preserve foods? Why are...Ch. 7 - Prob. 8RCh. 7 - A large hospital washes burn patients in a...Ch. 7 - Prob. 10R
Ch. 7 - Which of the following does not kill endospores?...Ch. 7 - Which of the following is most effective for...Ch. 7 - Prob. 3MCQCh. 7 - Which of the following cannot be used to sterilize...Ch. 7 - Prob. 5MCQCh. 7 - The data were obtained from a use-dilution test...Ch. 7 - The data were obtained from a use-dilution test...Ch. 7 - Prob. 8MCQCh. 7 - A classmate is trying to determine how a...Ch. 7 - Which of the following is most likely to be...Ch. 7 - Prob. 1ACh. 7 - For each of the following bacteria, explain why it...Ch. 7 - A use-dilution test was used to evaluate two...Ch. 7 - To determine the lethal action of microwave...Ch. 7 - Entamoeba histolytica and Giardia lamblia were...Ch. 7 - Between March 9 and April 12five chronic...Ch. 7 - Prob. 3CAE
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Choose the one answer that fits best. Which of the following statements regarding the proper procedure for using Micropipettes is NOT correct? O a. You cannot use a 2-20 µl micropipette to pipet 200 µl O b. To expel all the liquid from the tip, you have to press the eject button O c. To draw up solution, press and hold the plunger at the first stop before entering the solution O d. Micropipettes always require the use of a disposable plastic tip O e. While pipetting, micropipettes should always be held as straight as possiblearrow_forwardWhich of the following treatments would be most useful to remove microbes from air pumped into a surgical environment? Giant magnets Filtration Gaseous glutaraldehyde Gaseous alcoholarrow_forwardAssume that you are responsible for decontaminating materials in a large hospital. How would you sterilize each of the following? Briefly justify your answers. a mattress used by a patient with bubonic plague intravenous glucose-saline solutions used disposable syringes tissues taken from patientsarrow_forward
- In sterilization, which among the supplies, instruments, glassware, etc. under the list of materials can be sterilized using either or both equipment below? List them down. For "autoclaving" For Dry heat oven Can be sterilized only sterilization with either Materials: 200-ml Erlenmeyer flask Stove 500-ml Erlenmeyer flask Autoclave 10-ml graduated cylinder Analytical balance 100-ml graduated cylinder pH meter Spatula Stirring rod 100-ml beaker Test tubes Distilled water Petri dish Stirring rod Alcohol lamp Glass dropperarrow_forward5 1 2 6 Testing Anti-Microbial Agents: Disk-Diffusion. Lab Report Fill out the zones of inhibition table with your data: Agent Tested Cleansing Spray 3 4 Foaming Handwash Hand Sanitizer Lysol spray Detergent Desinfecting zone of inhibition: (mm) E. coli 10mm 15 mm 20mm 0mm 9mm P. aeruginosa 8 mm 35mm 17mm 15mm 0 mm 1mm Hydrogen Peroxide Here, write a few observations about your experimental results. 25mm S. aureus 25mm 20mm 25mm 12mm 8mm 42mm What factors (at least 2) other than the identity of the agent being tested can influence the size of the zone of inhibition? NOT Were any colonies observed within the zone of inhibition? Even if you didn't have any, explain why you might see colonies in the zone of inhibition. Be specific about how that might happen? What follow up questions or conclusions do you have related to your data? (at least 2)arrow_forwardIn pharmaceutical companies, Sterilization is an important step for quality assurance and approval of pharmaceutical products. Based on this concept, answer the following questions. What are the factors that affects the efficiency of the disinfectantarrow_forward
- The solution containing bacterial spores is heated in an autoclave. When the autoclave has reached a constant temperature of 121 °C, there are still 106 spores/ml. The specific death constant for bacterial spores at 121 ° C is 11.62 min-1. How long should the heating be continued at a constant temperature so that there are 1 spores/ml left? Enter the answer in minutes to three decimal places.arrow_forwardAccording to the table above, name 1 method that is least effective in killing endospores and explain why.arrow_forwardIdentify what is being described. All of the answers should be in numerical format. Please answer all the given items. Will give you thumbs up and good ratings. Take your time :)arrow_forward
- Oxygen is always beneficial to micro-organisms. Discuss this statement in the context of factors that influence microbial growth.arrow_forward(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.arrow_forwardIn the laboratory, autoclaving is required to prepare media for the growth of microorganism. What type of method of control does this involve? Dry Heat Moist Heat Chemical Radiation All of the optionsarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
