What do to do when the disstillation did not make the sample completely pure? What could have went wrong

Q: A food sample with an unknown number of contaminating bacteria was serially diluted to 10-6. A…

A: Serial dilution of a food sample containing unknown quantity of contaminating bacteria was performed…

Q: What is the principle and step by step procedure of Dry Blood Spots collection?

A: Blood sampling A venous blood sample is usually preferred for routine laboratory tests. Arterial…

Q: Why is skin contamination such a big problem in blood culture test?

A: Contamination can arise during the preparation of the venipuncture or catheter insertion site, the…

Q: How would you prepare a 1:500 dilution? You cannot use more than 10mL per tube.

A: In scientific research and experimentation, it is often necessary to dilute substances to achieve…

Q: The physician who treats your puncture wound opts to insert a drainbefore applying the dressing.…

A: There are four types of cells/Tissues involved in this tissue repair mechanism:- 1) STEM CELLS- They…

Q: Lid of petri dish was left on bench top for a few minutes after pouring of sterile medium. Effect:…

A: Microbiology is the study of microorganisms that are invisible to the naked eye. The microorganisms…

Q: A swab for culture is received from a doctor's  office. The staff forgot to mention the source from…

A: Introduction Microbiology is the branch of science that deals with the study of different types of…

Q: why is the tube passed through the flame after removing and before replacing the cap

A: It is a aseptic technique follows during the inoculation of pure culture of microorganism. This…

Q: What is the proper collection time period for a fecal fat specimen? 1) 24 hours 2) 48 hours 3) 72…

A: Fecal lipids come from four different places. They are lipids that are consumed but are not…

Q: Difference between streak plate method and serial dilution

A: Ans: Streak plate method- It is a technique used mainly to isolate pure culture of bacteria from…

Q: in the clinic, the acid-fast stain is used to diagnose infection with which bacterium?

A: The Ziehl-Neelson (ZN) stain is the most commonly utilized of the different types of AF staining…

Q: which bacteria is Coccobacillary,gram negative, non motile and negative oxidase test?

A: Bacteria are microscopic organisms which belong to prokaryote because these are unicellular…

Q: The sediment observed in stained blood smear caused by: a) Overstraining b) More Haematoxylin in the…

A: Here we have to explain about why sediment observed in stained blood smear.

Q: Do you think that your hand were "sterile" after any of the four treatments? (only water, Ivory soap…

A: The effectiveness of different hand cleanliness strategies in setting up hand sterility is the…

Q: Why was a blood agar, rather than a nutrient agar, plate used for the culture from your mouth?

A: Cultured bacteria are any bacteria that grow in the lab by the microbiologist using the required or…

Q: What is the difference between the pour plate method and the spread plate method? Why might you…

A: Standard plate count method is a growth based approach that counts the number of living…

Q: Describe the type of media you choose in the laboratory, use and prepare them ,, I want to describe…

A: 1. Glass slides on which the sample is placed. 2. Cover slip made up of plastic. 3. Dropper 4.…

Q: When bacteria from a throat swab are streaked on blood agar, why is the agar stabbed several times…

A: The initial identification of the streptococcal and enterococcal species is based on their hemolytic…

Q: Why is it necessary to flame the top of the bottle before pouring the plate?

A: Aseptic techniques are used to prevent contamination from pathogens. These are used in clinics and…

Q: What is Iodine Test? Explain.

A: Introduction :- Using a chemical reaction, the iodine-starch test can determine whether starch or…

Q: Explain following this procedure during preparation of temporary slide. 1)Adding water to separate…

A: Approach to Solving the Question:To properly prepare a temporary slide for microscopic examination,…

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: What pathogenic agent undergoes the Sigmoidoscopy Material procedure?

A: The sigmaidoscopy procedure test uses a thin flexible tube with a camera and light on one end. The…

Q: During a flame test, why is it necessary to use a new splint for each element?

A: A splint is a thin wood/stick used commonly in laboratory for performing a flame test. The splint is…

Q: this lab was carried out the results  are in the picture below plz provide a aim for this lab abd…

A: Bacterial inhibition refers to the ability of a substance or agent to prevent the growth or…

Q: RESULTS Results of the plate counts for the samples you worked with. Number of Colonies for Each…

A: Cfu/ml= (no. Of colonies plated× dilution factor)/volume plated.…

Q: Å Q/ Why don't we fixation to simple negative staining?

A: It is method followed to help view a specimen under the microscope to study its morphological…

Q: which agent was most effective against the spore-forming bacteria that was tested? How does the…

A: Microorganisms, such as bacteria, viruses, and fungi, are ubiquitous in our environment. Many of…

Q: What is the purpose for testing a specimen for hydrogen sulfide production?

A: Hydrogen sulfide is produced when a bacterial strain reduces the sulfur compounds.  The specimens…

Q: In the petri dish in Figure 1, the bacteria Esherichia coli (E. coli) was grown and treated with…

A: The disk diffusion technique is used to estimate the susceptibility of the organism to a particular…

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: a. After conducting the Gram staining procedures and you observed that all cells are stained with…

A: The microorganisms that can be found in several areas of the habitat and come under the category of…

Q: If you conducted an acid-fast stain on a sputum sample from a person with tuberculosis, what would…

A: The acid-fast staining technique is a differential staining technique. The bacteria which get…

Q: Is it important to have a standardized way of counting and reporting AFB seen on a direct sputum…

A: Acid-Fast Bacilli (AFB) is a bacterial species that causes tuberculosis in humans and testing of…

Q: a specimen from an infected wound has been submitted to the clinical laboratory. explain in detail…

A: Viruses, bacteria, fungus, protozoa, and helminths are the five types of disease-causing agents…

Q: Ms. Mosley removes equipment from the autoclave using sterile gloves. What could be found on this…

A: An autoclave is a medical device that is used to sterilize instruments, equipment, and other objects…

Q: What does the presence of gas in the Durham tubes for the presumptive test indicate?

A: Presumptive test : it is a test to identify bacteria from the large soil, water medium.  It is known…

Q: Why is it necessary to use immersion oil when the 100X objective is used'

A: Note - we answer one question at a time. Immersion oil is transparent and has specific viscosity and…

Q: Tell me how dis you prepared the gel if the tray is 150 ml

A: Gel electrophoresis is a standard molecular biology procedure used for the separation of DNA by…