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

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

A: In microbiology, the presumptive test is used to find out the presence of gas-forming lactose…

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: Why is direct fecal smear a routine procedure in the parasitology section?

A: A faecal smear is a stool specimen that is tested in a laboratory.

Q: What is the source of the mold that grew on the samples?

A: A growth of fungus that occurs on food substances is referred to as molds. The molds grow in the…

Q: If the test method used in the laboratory varied from the specification, how will  it affect the…

A:

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: Between Shigella flexneri and Shigella sonnei, which are positive or negative for methyl red test…

A: Genus Shigellae are Gram-negative rod shaped, facultatively anaerobic, non-motile, non-spore-forming…

Q: Why is it a mistake to use the same syringe, even with a new, sterile needle?

A: Injections are used for administration of drugs, contraceptives, vaccines or any other therapeutic…

Q: Where did evidence of SRY come from?

A: SRY is a gene which is found on chromosome Y. It is male sex determination factor in  Human beings.

Q: Why might the enteropluri tube system fail to identify the organisims tested?

A: The enteropluri tube system is used in the rapid identification of the gram-negative bacilli from…

Q: Does a positive presumptive test mean that the water is absolutely unsafe to drink?

A: In microbiology, the presumptive test is used to find out whether gas-forming lactose fermenters…

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: What test would confirm the presence of Bacillus Cereus?

A: B. cereus is the bacteria species come under rod shaped bacteria, they are motile bacteria and form…

Q: What stage of infection did the chloroquine treat?

A: Chloroquine is a very popular antimalarial drug available in the market. It is highly effective…

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: What force was responsible for the movement of substances through the filter paper?

A: Filter paper is made up of cellulose and thus functions as permeable membrane and movement of…

Q: Why was it necessary to also test the patients for HBV and HIV? Why is it a mistake to use the same…

A: Ans: HBV is the Hepatitis B virus and HIV is the Human immunodeficiency virus. These two are highly…

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: The color of the positive result for Iodine Test.*   A. Pinkish B. Orange-Brown C. Blue-Black D.…

A: Iodine test is performed to detect the presence of starch in a solution. When iodine is added to a…

Q: What are the possible sources of contamination that may result during the streak plate procedure?

A: The streak plate procedure is used to isolate microbial colonies in pure form. During the procedure,…

Q: What is a Urease test

A: Urease Test:                  A biochemical test that detects the alkaline fermentation of urine…

Q: What is the best lab test to perform for a unknown intestinal bacteria?

A: Bacteria found in the intestine or colon region of the digestive tract since the pH of the stomach…

Q: Provide reasons for false-positive nontreponemal test results.

A: Syphilis is an infectious systemic venereal disease caused by the spirochete bacterium Treponema…

Q: Why is it a mistake to use the same syringe, even with new , sterile needles?

A: Contamination is the presence of any impurity, constituent, or any unwanted element that can infect,…

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: What color tube is used for creatinine test?

A: Introduction:-  Creatinine test is done to assess the situation of the kidney. Creatinine values…

Q: Is this a successful streak plate? What mistake do you think was made in the image? Thank you.

A: Answer. No, this not a successful streak plate.  From the picture above it seems that you want to do…

Q: What does the direct ELISA test for?

A: ELISA(enzyme-linked immunosorbent assay) is a biochemical assay to detect the presence of ligand…

Q: What would the results of the Durham tubes be for Staphyloccocus Epidermides?

A: Durham tubes are the tubes which are used in microbiology. They are used to detect the presence of…

Q: Why is a nose clip necessary for obtaining a valid spirogram?

A: The lungs are organs involved in ventilation, that is, inhaling and exhaling air. During inspiration…

Q: What is the significance of reporting the color and consistency of a stool specimen

A: Stool is the undigested portion of food intaken.It consists of waste products that are eliminated…

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 purpose was served by filtering the milk sample after the addition of acid?

A: Milk is a white color liquid which is consists of various proteins and vitamins. Milk is an…

Q: What are the clinical significance of red, black, and gray colored stool specimens?

A: Stools are collected to test several disease conditions like liver disease ,kidney disease , any…

Q: Why is it necessary to make a skin puncture to a depth of 3mm?

A: Phlebotomy refers to the process of puncturing the vein with a cannula to collect blood. Blood…

Q: why is the recommended incubation procedure for the API 20e system 18 to 24 hours ?

A: Introduction The API 20 E is a non-fastidious or Enterobacteriaceae, and Gram-negative bacteria…

Q: Laboratory report about Thiols procedure, result & observation, conclusion(tabular)

A: Functional groups are a group of atoms within organic molecules carbon backbone. They have their own…

Q: Why is it important to use the correct/proper dissecting tools?

A: The Use of correct / proper dissecting tools is important for a particular dssecting procedure…

Q: Answer 6-7 sentences each. pleaseee badly need it ASAP State the importance of familiarizing with…

A: Microbiology is the study of microscopic life forms that include bacteria, viruses, parasites, and…

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

A:

Q: What test would confirm Salmonella enterica?

A: Salmonella enterica is a rod-shaped gram-negative bacterium. A large number of Salmonella enterica…

Q: Why should the specimen be albumin free when performing the chloride test for urine?

A: Urine specimen should be free from albumin when performing the chloride test due to the following…

Q: Is the ant test the same as the odor test in the physical examination of urine?

A: Kidneys are the main organs of the urinary system. The nitrogenous waste is usually excreted in the…

Q: Is Nitrate reduction test a efficient test for unknown intestinal bacteria?

A: Nitrate Reduction Test is used to determine the ability of an organism to reduce nitrate (NO3) to…

Q: Why was it necessary to administer antibacterial drugs in Burali ulcer for two months rather than…

A: INTRODUCTION Buruli ulcer, caused by the bacteria Mycobacterium ulcerans, is a devastating chronic…

Q: which tests involves deliberate contamination of an inanimate surface with a mircobial suspension?

A: According to the question, we have to explain the name of the test involves in deliberate…

Q: With reference to Table 2, what was the total extract volume in mL? Enter a number (no decimal…

A: In cells, there are thousands of distinct proteins. Extraction and purification of these substances…

Q: What was the direction of centrifugation (which fractions correspond to the bottom of the centrifuge…

A: Centrifugal force : centrifugal force is the force that applies on a particle moving in a circular…