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

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: Match the test with the appropriate reagent/ chemical  a. DNA test b. Paper chromatography  c.…

A: Genetic material is nothing but the sequence of nucleic acids which is called as DNA. It contains…

Q: What the types of microorganisms contamination?

A: Microbial contamination generally occurs when a food has been poisoned by microorganisms, including…

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: Is it possible for nonprotein compounds to test positive for the xanthoproteic test? What are these…

A: Proteins are made up of number of amino acids. Amino acids are organic compounds with two functional…

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: Triple Sugar Iron slant for Staphylococcus Epidermidis , tell me the results I would get if I did…

A: The Triple Sugar Iron (TSI) test may be a microbiological check roughly named for its ability to…

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 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: Inoculation Positive Results Negative Purpose Results Test Medium Reagents Mannitol Salts Loop Agar…

A: Biochemical reactions aid in identification of different bacterial species based on their…

Q: What is the significance of heat fixing the smear?

A: Gram staining is a common laboratory technique in microbiology that is used to differentiate…

Q: In the multiple fermentation tube technique does the absence of gas formation after 24 hours…

A: Coliform microbes are life forms that are available in the climate and in the defecation of all…

Q: yield

A: The Dische's test is a chemical test that is utilized to detect the presence of DNA in a solution.It…

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: 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: selective agar media for salmonella typhi?

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

Q: Is bile esculin test a efficient test for unknown intestinal bacteria?

A: In the intestine, only those bacteria that are not killed by the bile survive. The normal bacteria…

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

A: Water is tasteless, transparent, inorganic. Colorless, and odorless chemical substance. Its chemical…

Q: Since it is very rare for any direct patient sample to be axenic, what could you do to get to an…

A: A "microbe" is a living entity that is so tiny that it cannot be seen with the naked eye.…

Q: what is the extraction of the causal organism from inoculated host?

A: Robert Koch (1843 - 1910) was a famous biologist who made bacteriology an important science. He is…

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: 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 are the patient preparation reminders in direct fecal smear test?

A: The stool is used for the differential diagnosis of several infections and disorders such as…

Q: What is the difference between a Hemin test and a Benzidine test?

A: Hemoglobin is a blood protein that is responsible for oxygen transport in the tissues. Hemoglobin…

Q: Explain how staphylococcus capitis  test is different from streptococcus salivarius  test ?

A: Streptococcus salivarius and Staphylococcus capitis are both pathogens for humans. These two…

Q: If the five-digit code that is tabulated cannot be found in the EnteroPluri-Test Codebook, what that…

A: Prokaryotes are the primitive organisms that were the first to develop and harness life on Earth.…

Q: Please explain how the use of an Eosin Methylene Blue Agar plate can help determine the type of…

A: Eosin Methylene Blue (EMB) agar is a differential microbiological medium, which somewhat hinders the…

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: What is the most commonly used fixative in stool samples and why?

A: Fixative is a moist environment for transporting and preserving intestinal parasites in stool…

Q: What is the coliform test when is it used? What is its purpose? How does it function? What are the…

A: All water that is naturally exposed to the atmosphere, such as rivers, lakes, and reservoirs. It is…

Q: What items are considered semi-critical and what is their level of disinfection in the Operating…

A: A hospital is a place or health care institution that provides care and treatment to the patients…

Q: In a Triple Sugar Iron test, what are the results and (what should they look like) for the bacteria:…

A: triple sugar ion test or TSI is a confirmatory as well as a differentiative biochemical test which…

Q: Why are only few drops of CuSO4 solution added during the biuret test?

A: Biuret test also known as Piotrowski's test, is a chemical test used for detecting the presence of…

Q: Once the completed test establishes the presence of coliforms in the water sample, why might you…

A: Water is tasteless, transparent, inorganic. Colorless, and odorless chemical substance. Its chemical…

Q: Why is serum beta glucan testing used for diagnosing an invasive candidiasis?

A: Yeast a type of fungus. Candida is a genus of yeast. When any member of the genus Candida causes a…

Q: Why is it necessary to test for endotoxin in water used forinjectable drug preparations?

A: The microbial toxins are poisonous substances generated by microbes such as fungi and bacteria to…

Q: Do the results from a confirmed coliform test represent total or faecal coliform and why?

A: Fecal coliform bacteria may occur in ambient water as a result of the overflow of domestic sewage or…

Q: what is the purpose and objectives on doing nitrious acid test?

A: Amines are the compounds and functional groups having a basic nitrogen atom with a lone pair of…

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: which kind of sample gives positive result for Molish test?

A: It is a chemical test which is named after the botanist Hans Molisch.  This test involves 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: Describe the process of qualitative water test for coliform contamination. If shown EMB plates, be…

A: * Coliform bacteria are Bacteria and stains  Gram negative and they can be motile or non motile…

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: What is Hemin test and Benzidine test?

A: Hemin test - Hemin can be produced from haemoglobin by the so-called Teichmann test, when…

Q: List 2 non-chemical means of disinfection.

A: Disinfection refers to the process by which most pathogenic disease-causing microorganisms, except…

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.