Q: Why do you have to boil the agar solution before dispensing it into tubes?
A: Agar is the medium which can used to grow the micro organisms in petri plates. The selected…
Q: Does a positive presumptive test mean that the water is absolutely unsafe to drink? Explain. 2.…
A: Presumptive tests are cheaper than the confirmatory test. These tests are conducted to ensure the…
Q: The use of abomasum as a source of rennet is not practical. Explain why
A: Rennet is an enzyme or a substance that is produced as a coagulant and helps in the production of…
Q: Explain whether the MacConkey agar plate inoculated with good water would show the presence of…
A: Water contamination is the presence of unwelcome particles in the water. Water bodies may become…
Q: Is the eosin methylene blue agar? (EMB) a complex or defined medium? Explain based on its…
A: Complex media consists of nutrients such as water soluble extracts of plant or animal tissue and…
Q: What is the purpose of the crystal violet, bile salts, and neural red in MacConkey Agar media?
A: MacConkey Agar or MAC is a culture medium. It is a selective and differential medium designed for…
Q: why is it that psychrotrophs placed in TSA medium are incubated at 7oC?
A: Psychrophiles are organisms that can survive and reproduce in low temperatures as low as -20 degrees…
Q: While working with Mannitol Salt Agar you notice the growth of staphylococci however other…
A: Mannitol Salt Agar (MSA) is a media which has high concentration of salt solution. There are found…
Q: What is the differential agent in EMB medium? a. lactose b. glucose c. phenol red
A: There are different media available for the growth of microorganisms: Basal media, enriched media,…
Q: Colonies that produce alkaline waste on Hektoen enteric agar will turn O blue-green. pink. black. O…
A: In presence of colonies , alkaline waate on hektoen enteric agar turn into blue green color.…
Q: How does McConkey agar serve as both selective medium and differential medium ?
A: MacConkey agar is a culture media that contain bile salts, crystal violet dye, neutral red dye along…
Q: hat are the components of a carbon-free broth or minimum medium for Bacillus subtillus ? An example…
A: Nutrient media is used for the growth of different microorganisms in laboratory.
Q: How would you distinguish between Staphylococcus aureus and S. epidermidis on mannitol salt agar and…
A: Hi! Thanks for your question. As you have posted multiple questions and have not mentioned which one…
Q: how does increasing the incubation temperature at which a plate containing psychrotrophic bacteria…
A: Psychrophiles or cryophiles (adj. psychrophilic or cryophilic) are extremophilic organisms that are…
Q: How does alkaline treatment improve the quality of agar/carrageenan extracted from the seaweed…
A: Agar is a polysaccharide created from two essential additives. Agarose and agaropectin. Agarose is…
Q: How can you use the characteristics of L.monocytogenes to produce a growth medium that is both…
A: Listeria monocytogenes is a Gram-positive, facultative intracellular bacteria that can cause human…
Q: Identify the oxidase-negative, gram negative bacillus isolated from the blood cultures of a…
A: Gram-negative bacteria are those that do not retain the crystal violet stain after gram staining.…
Q: Describe the appearance of an S. agalactiae colony grown on blood agar. Describe how that colony…
A: The initial identification of the enterococcal and streptococcal species is based on their hemolytic…
Q: How is agar in the petri dish prepared to grow the bacterial specimen? explain in your own words.
A: Agar is a polymer made up of subunits of sugar galactose and is a component of cell walls of several…
Q: what is the cause of different species of psychrotrophic bacteria growing in the CTSA medium at 7…
A: They can grow at extreme low temperatures and lead to spoilage of food by modifying the compounds…
Q: Using the Table above as a guide, indicating what media could be used to differentiate the…
A: Introduction : The bacterium Staphylococcus epidermidis is gram-positive. It is a natural component…
Q: Why is agar ideal for microbial cultivation?
A: The microbial cultivation is the process in which microorganisms are cultivated in the laboratory,…
Q: Is Bacillus cereus negative or positive for growing in high salt concentrations?
A: Bacillus cereus is a gram-positive, endospore forming, non-capsulated bacillus, motile with…
Q: How is the CTSA (coconut water tryptic soy agar) growth medium designed to meet the nutritional need…
A: Many different kinds of media are formulated in the microbiology lab to support the growth of a wide…
Q: Describe the colony morphology if Neisseria Gonorrhoeae if it is grown in agar plates in the…
A: Neisseria Gonorrhoeae, also known as gonococci, is a gram-negative diplococcus. In 1879 this…
Q: Explain the significance of the Snyder agar medium and its differential nature as a means to detect…
A: Dental caries is also called tooth decay or cavity. It causes the formation of tiny holes in the…
Q: what type of bacteria may cause spoilage in coconut water that has been in the fridge for more than…
A: Coconut Water Coconut water (CW) is a slightly sweet liquid made from the endosperm of coconuts.…
Q: Which common hospital pathogen is able to grow abundantly in soap dishes?
A: The most common type of the prokaryotes is bacteria. They are found in every existing environment on…
Q: why are psychrotrophic bacteria incubated at 7 degrees
A: Each species of microbe has a preferred temperature that lies somewhere between its characteristic…
Q: What culture medium can be used for the acclimatization of Bacillus and Pseudimonas to degrade…
A: Answer: CULTURE MEDIA = These are the selective and differential media which are used to grow…
Q: Is the Mueller-Hinton Agar (MHA) a complex or defined medium? Explain based on its composition. Is…
A: Mueller and Hinton in 1941 developed Mueller Hinton Agar(MHA). MHA is used for routine…
Q: How might Campylobacter contamination of food productionanimals be controlled?
A: Campylobacter infection is caused by Campylobacter bacteria. It is the most common bacterial cause…
Q: Can members of the genus Cytophaga be cultured on standard solidified media? Why or why not?
A: The microorganisms can be grown in-vitro by subjecting them to suitable growth conditions. The…
Q: Name the source from where agar is commercially obtained.
A: Agar is a jelly-like substance that is made up of linear polysaccharide agarose and a heterogenous…
Q: Explain what features of endospores make them so resistant tomicrobial control, and what sterilizing…
A: Endospores are a tough, non-reproductive structure produced by the Firmicute family of bacteria that…
Q: Colonies have grown in a nutrient agar plate. However, it did not grow along the lines of streaking.…
A: Streaking method This method is used to produce isolated colonies of bacteria. This helps in…
Q: how could you determine if there is any contamination on your agar?
A: Agar consists of two polysaccharides, agarose and agaropectin, but agarose making up about 70% of…
Q: Deodorant Phenyl will not kill which microorganism? O A. Plesiomonas O B. Treponema O C. Klebsiella…
A: The deodorant phenyl is designed to kill bacteria (usually odor-making bacteria) as well as provide…
Q: Spores and toxin-producing microorganism produce toxins need higher Aw than minimum Aw for microbial…
A: Water activity (aw) is basically a term describing the availability of water to microorganisms. It…
Q: what is Rose Bengel Agar?
A: Rose Bengal Agar - Rose Bengal Agar is selective medium it is used to detect and enumerates yeast…
Q: How is the medium (Mitis Salvarius agar) selective?
A: Mitis Salviarius agar is used to differentiate among species of Streptococcus and the very close…
Q: Which culturing method provided the clearest results, the semisolid medium tube or the soft agar…
A: Agar is a jelly-like substance obtained from red algae. It is a mixture of two components namely…
Q: MSA is a selective medium and contains a higher salt concentration, a pH indicator and Mannitol…
A: Mannitol Salt Agar (MSA) is used as a selective and differential medium for the isolation and…
Q: Colonies that produce alkaline waste on Hektoen enteric agar will turn O blue-green. O pink. O…
A: Colonies that produce alkaline waste on Hektoen enteric agar will turn blue- green.
Q: Gardnerella vaginalis is a gram variable rod. What type of media should be used when culturing for…
A: Gardnerella vaginalis grows primarily on enriched culture media, dominantly used being Modified…
Q: What property of biofilm microbial communitiesmakes them clinically and industrially relevant? Why…
A: Biofilm is a dynamic structure adopted by microorganisms such as bacteria and fungi, and is a…
Q: explain why you would expect to see similarities in the types of colonies on the fomite plates and…
A: Organisms that are too small to be seen by the naked eye are microorganisms. These organisms can be…
Q: Which one of the following may produce "wrinkled" colonies on medium? Select one: O A Chlamydia O B.…
A: As per our guidelines, we are supposed to answer only one question. Kindly repost other questions as…
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- Is the mannitol salt agar (MSA) a complex or defined medium? Explain based on Composition. What kind of media based on what kind of microorganisms it allows to growIs the Mueller-Hinton Agar (MHA) a complex or defined medium? Explain based on its composition. Is MHA a A) differential, B) selective, C) both differential and selective media, or D) neither? Explain based on what kind of microorganisms it allows to grow.What growth factor is often supplied for cultivation of fastidious bacterial pathogens?
- How is the CTSA (coconut water tryptic soy agar) growth medium designed to meet the nutritional need of psychrotrophs and mesophiles?What is differential medium? Describe at least five (05) differential media along with the agent(s) responsible for conferring differential propertiesWhat culture medium can be used for the acclimatization of Bacillus and Pseudimonas to degrade phenol? It must be a nutrient-poor growing medium.