What gram-positive bacterium can give a positive presumptive test?

Q: Between Bacillus megaterium, Bacillus sphaericus, and Bacillus subtilis, which are positve for…

A: MSA or Mannitol Salt Agar is a differential and selective medium that encourages the growth of some…

Q: Why is it important to limit the quantity of cells used to prepare a smear?

A: A thin layer of cells or tissues that are taken from the body of an organism under study which is…

Q: What test requires inoculation of rabbit serum?

A: The formation of  clot in the plasma indicates coagulase production. Coagulase is a protein enzymes…

Q: What is a mixed culture? A contaminated culture?

A: A microbiological culture, or microbial culture, is a technique for increasing microbial creatures…

Q: What is the purpose of flame-sterilizing the mouth of the test tube and the side of the Petri dish…

A: Flame is an excellent way of cleaning a surface from contaminating organisms. Instant high heat…

Q: If an unknown bacteria was given that was gram-positive coccus, and the catalase test was performed,…

A: Gram-positive bacteria, such as Staphylococcus aureus, are bacteria that provide a positive response…

Q: Why is a block of agar inoculated rather than streaking the fungal culture on a plate?

A: The culture medium or growth medium is a liquid, solid, or semisolid designed to support the growth…

Q: What are the purposes of the antimicrobial agents present in the selectivemedia used for the…

A: the purposes of the antimicrobial agents present in the selective media used for the isolation of…

Q: What are the most common methods of male and female surgical sterilization?

A: Fertilization is a natural process of producing children and offspring where the male gamete(sperm)…

Q: What is the chemical basis of the Xanthoproteic Test? Give the chemical reaction involved.

A: Protein is a nitrogenous organic macromolecule that is essential to human health. It is responsible…

Q: Why is staining of stool samples very important in identifying parasites?

A: In this question it is to describe that why is staining of stool samples very important in…

Q: Describe the steps you would take to isolate, cultivate, and identify amicrobial pathogen from a…

A: The techniques used in the identification of microbes can be termed as the six "I's": inoculation,…

Q: What is the drug of choice for patient who had S. Aureus culture? Why?

A: Staphylococcus aureus is responsible for a wide range of symptoms and illnesses. Penicillin is the…

Q: Give the uses/functions and images of each apparatuses Basic Laboratory Equipment Uses/Functions…

A: Antibiotic discs are used in microbiological studies to observe the effects of various antibiotics…

Q: Why is the loop flamed before it is placed in a culture tube? Why is it flamed after completing the…

A: The term sterilization refers to any process that eliminates, kills, removes, or deactivates all…

Q: How do we prepare smear

A: The preparation of a smear is required for many laboratory procedures, including the Gram-stain, for…

Q: Microbiology: How can Tube Coagulase Test differentiate Staphylococcus aureus from other…

A: INTRODUCTION Staphylococcus aureus Staphylococci, are gram positive cocci that occur in grape like…

Q: You counted 40 colonies on a plate in your dilution series. The plate was inoculated with 1.0ml from…

A: A microbial sample will have enormous amount of cells. To estimate this by calculation, the sample…

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: 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: selective agar media for salmonella typhi?

A: Selective agar medium is used to isolate a particular type of bacterial species or genus .

Q: not test water samples directly for Salmonella typhosa or other pathogens

A: There are serious limitations to the use of direct isolation of specific pathogenic bacteria for…

Q: Why are traditional tests such as metabolic test not always used to ID clinically important…

A: Traditional methods for identification of microbes include phenotypic tests or biochemical tests…

Q: What is the importance of using a test/control organism in describing the cultural characteristics…

A: The food materials on which the organism is developed is called culture medium and the development…

Q: Which medium is used for indole test and Coagulase Test?

A: Biochemical tests are used to identify microbial diversity based on variations in the biochemical…

Q: What are the examples of organisms that belong to the positive test in in-dose test?

A: Tryptophan is an amino acid that can undergo deamination. Indole is generated by reductive…

Q: What test can be performed to differentiate between group A and group C streptococci?

A: Bacteria are a group of prokaryotic microscopic single celled organisms. They live in diverse…

Q: Is tripple sugar iron test a efficient test for unknown intestinal bacteria?

A: Triple sugar iron agar is a differential medium that contains lactose, sucrose, a small amount of…

Q: Is phenol red test a efficient test for unknown intestinal bacteria?

A: Fermentation of carbohydrates is the method used by microorganisms to produce energy. Phenol Red…

Q: What is the result of Staphylococcus epidermidis in the TSI agar test?

A: Bacteria are microorganism that most commonly occur in the soil, air, water and in adverse…

Q: Match the confirmation test to the category of bacteria. (each category can be used multiple times)…

A: Gram-positive bacteria are bacteria that test positive in the Gram stain test, which has…

Q: which bacteria is Coccoid as singles or in pairs, gram positive, non motile and negative oxidase…

A: Answer: BACTERIA = These are the unicellular prokaryotic cells which lacks membrane bound cell…

Q: How common is the flotation technique being done in the Philippines?

A: Keeping in the eye the increase in a number of gastrointestinal infections, the best solution that…

Q: What would be the expected outcome of an endospore stain test If the bacteria is a pathogenic…

A: Endospore stain is a differential stain that is used to image endospores in bacteria. A few genera…

Q: what would you conclude if an inoculated plate had colonies between the streak lines

A: Streaking is a method of isolating a pure strain from single species of  microorganism . in this the…

Q: Before using the API® Staph System, what tests should be performed on bacteria to confirm that they…

A: API Staph (analytical profile index) is a systematized procedure used for the identification of the…

Q: Enterotube: Which group of bacteria are detected using this test? Which specific chemical tests are…

A: The Enterotube is an illustration of a quick, multi test framework utilized in Identifying of…

Q: Between Bacillus megaterium, Bacillus sphaericus, and Bacillus subtilis which are positive or…

A: The VP test detects organisms that utilize the butylene glycol pathway and produce acetoin. It…

Q: how to find out the test is differential or selective in the microbiology lab test?

A: Many kinds of medias are used in microbial study. Two types of media having similar inferred names…

Q: What things can be done during sample collection of a sick patient to help eliminate the culture of…

A: Normal flora is the organisms that are present in the body for normal functioning. The normal flora…

Q: What microorganisms other than coliforms are likely to give positive presumptive test?

A:

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: How is the Gram stain used clinically to help identify the cause of an infection?

A: Gram stain or sometimes "Gram staining", likewise called Gram's method, is a technique for staining…

Q: Other than the PYR test, what is another use of the PEP reagent?

A: PYR is a colorimetric method used to detect the presence of pyrolidonyl arylamidase activity in a…

Q: The Xanthoproteic test involves what type of reaction?

A: The xanthoproteic reaction is the method that is used to detect a presence of the proteins soluble…

Q: In the entrropluri tube system which test require the addition of reagents after the incubation time…

A: Entreropluri test system is a Enterobacteriaceae identifying system. It is use to identify some gram…

Q: Why are aseptic techniques implemented during inoculation?

A: Aseptic means without contamination and Inoculation means transfer of a bacterial sample onto a…

Q: What is the definition of the term Resistant?  How do you detect that your microorganism is…

A: Resistant- ability of bacteria to endure the effects of a damaging chemical substance is known as…

Microbial Growth

The development of microbial growth is influenced by various natural conditions (both physical and synthetic) like pH, temperature, saltiness, gas focus (O2, CO2, and H2), nutrients, water action, and assimilation. Knowing the distinctive physical and chemical factors that influence the development and endurance of microbial growth in the climate will assist with reinforcing endeavors outfitted towards their control. These lines lessen or diminish their harmful impacts on humankind, creatures, and the climate.