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INTRODUCTION
Acid fast bacteria
Also knows as acid fast bacilli. They are group of bacteria that can resist decolorization by acid during staining.
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Solved in 2 steps
- Hello, We are doing a discusion in Biology class about bacterium. I am stuck In this bacteria:Clostridium botulinum. I have no idea what to add to the description my classmate did. Can you please help me with that? (I would apreciate a short ansewr :) He wrote this: Escherichia coli is a bacterium which is normally present in human and animal intestine; this bacterium has some unique properties, which are needed to be known by the health care professionals. A special feature is the fact that this bacterium has the beneficial effect for human health, but also pathogenic strains, such as Escherichia coli O157: H7 causes diseases, for example, gastrointestinal colibacillosis, and life-threatening condition – hemolytic uremic syndrome (HUS). Also, E. coli is a facultative anaerobe categorized as an organism that uses both aerobic respiration and fermentation when making energy and nutrients. This metabolic versatility enables E. coli to live in different conditions and change as the…Both ethanol and trimethyldodecylammonium chloride are active ingredients in cleaning products used to disinfect. Both will inactivate coronaviruses by a similar mechanism of action. Describe that mechanism of action and why both chemicals are able to cause it. (Reminder: coronaviruses are "lipid envelope" viruses.) Consider the physical properties of these compounds to answer the following question: why might you choose to use a cleaning product with one of these active ingredients over the other?Given this, if you used 6g of vitamin Z powder to make 20 ml of solution, what is the % concentration of this solution? (I gave the image since I don't know if that info is needed to solve this question.)It also gives a follow-up, if you can help here too: You work in a lab as a summer student. One of your tasks is to make sure that there is enough cell culture medium containing antibiotics to grow bacteria. One day you realize that there is only 5 ml of 10% Antibiotic stock solution in the freezer. You decide to use it all to prepare the working culture medium with 0.01% antibiotic. In the lab there is plenty of growth medium without antibiotics. (Note: dilution in medium is like dilution in water). You remember the equation to make dilutions of stock solutions. You usually use this formula to calculate the required volume of a stock solution, but you realize it can apply here as well, even though the unknown is the final volume. So, you make that dilution. Given that each bacterial…
- The antibiotic, tetracycline was serially diluted (2-fold dilutions), starting with tube #1 (100 µg/ml) and ending with tube #9 (tube #10 = Control). Tetracycline is a yellow powder that is freely soluble in water. To prepare the tetracycline solution, dissolve the powder in water, with heating, to make 50 mg/ml. How will you prepare the solutions for the two-fold dilution? Create a scheme on how to perform the serial dilution using the 50 mg/mL stock solution and 5 mL as final volume for each step.The highly pathogenic anaerobic bacterium Clostridium perfringens is responsible for gas gangrene, a condition in which animal tissue structure is destroyed. This bacterium secretes an enzyme that efficiently catalyzes the hydrolysis of the peptide bond indicated in red: where X and Y are any of the 20 common amino acids. How does the secretion of this enzyme contribute to the invasiveness of this bacterium in human tissues? Why does thisenzyme not affect the bacterium itself?QUESTION 1: What is the purpose of adding sodium hydroxide (NaOH) to the cheek cell pellet, after removing Phosphate Buffered saline, on p. 55 of the extraction protocol? Note: You might need to conduct an internet search to answer this question. The answer must be in your own words.
- 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?The images attached are the photos of bacteria in yoghurt under a misroscope. According to these images and your own knowledge, can you make a biological drawing of bacteria in yoghurt ( in a circle) and identify the types of bacteria accurately?Hello, We are doing a discusion in Biology class about bacterium. I am stuck In this bacteria:Escherichia coli I have no idea what to add to the description my classmate did. Can you please help me with that? (I would apreciate a short ansewr :) He wrote this: Escherichia coli is a bacterium which is normally present in human and animal intestine; this bacterium has some unique properties, which are needed to be known by the health care professionals. A special feature is the fact that this bacterium has the beneficial effect for human health, but also pathogenic strains, such as Escherichia coli O157: H7 causes diseases, for example, gastrointestinal colibacillosis, and life-threatening condition – hemolytic uremic syndrome (HUS). Also, E. coli is a facultative anaerobe categorized as an organism that uses both aerobic respiration and fermentation when making energy and nutrients. This metabolic versatility enables E. coli to live in different conditions and change as the conditions…
- QUESTION 3 Imagine that you are viewing a slide with a heat-fixed smear from an sputum sample that has been acid- fast stained. Bacteria from the sputum sample appear bright pink. On the same slide there is also a heat- fixed smear that contains Micrococcus luteus with cells that also appear bright pink. Does this pattern of staining support the hypothesis that the patient has tuberculosis? Why or, why not? O No, because the Micrococcus luteus cells should not stain pink, so there was probably an error in following the acid-fast staining protocol (e.g. perhaps the acid-alcohol step was eliminated or was too brief) No, because cells from the tuberculosis bacterium would not be expected to retain an acid-fast stain. Yes, because both tuberculosis bacteria and Micrococcus luteus are expected to retain an acid-fast stain. QUESTION 4 What species of bacteria could be used as a positive control for an acid fast stain? Any type of gram positive bacteria. Any type of gram negative bacteria.…Using this flow chart, a species that is alpha-hemolytic and catalase-negative is Streptococcus pyogenes Streptococcus pneumoniae Enterococcus faecalisQuestion 1: Which separation technique exploits the solubility differences of proteins? ANS: