Q: What is one very unusual method of treatment used with C. difficle patients
A: Clostridium difficile is a gram-positive bacteria that cause inflammation of the colon and…
Q: Between Enterobacter aerogenes and Enterobacter cloacae, which are positive or negative for methyl…
A: methyl red and Voges Proskauer tests both are biochemical tests for identifying bacteria in…
Q: Two patients are admitted to the hospital with bacterial gastrointestinal disease. Patient #1…
A: Gastroenteritis - It is the Inflammation of stomach and intestines ( Gastrointestinal tract)…
Q: Helicobacter pylori survives in the acidic environment of the human stomach, but this organism is…
A: Helicobacter pylori is a neutrophilic bacteria i.e. it loves the neutral pH and is able to survive…
Q: What are the routes of transmission of HBV
A: Question - What are the routes of transmission of HBV ?
Q: What is this organism? And what other test could be done to confirm it's identification? 1.Gram…
A: Introduction : Chris Grams classified bacteria into two types according to how they appeared under…
Q: What is the main purpose of haemolytic tests? What is the main substance responsible for this…
A: Pathogenic microrganism are the microbes that has capability to cause disease and infection inside…
Q: Show a diagram of beta-hemolysis and alpha-hemolysis by different bacteria on blood agar and explain…
A: Hemolysis is the process by which red blood cells in the blood are broken down by chemicals or by…
Q: How can we differentiate a Bacillus cereus from B. subtilis if both are beta hemolysis?
A: Answer: BETA HEMOLYSIS = It is the complete lysis of red blood cells in the agar, around the…
Q: Why might members of Campylobacter not be isolated from a stoolspecimen in a diagnostic laboratory?
A: Efficient Detection of pathogenic organisms ensures the success of laboratory techniques. It is…
Q: Explain how the type of hemolysis can be used to tell apart two species that would look the same…
A: Hemo means blood and Lysis means destruction so hemolysis is destruction of blood. Bacteria show…
Q: How do you identify Enterobacter aerogenes for the Urea test?
A: Enterobacter aerogenes are gram negative;motile;rod shaped bacteria which are responsible for…
Q: How would you devise a selective medium for Vibrio cholerae?
A: Mostly for selecting the agar medium as a enrichment broth, alkaline peptone water and thiosulfate…
Q: According to the hemolysis results, how does Bacillus cereus differ from B. subtilis?
A: Given: To find how does Bacillus cereus differ from B. subtilis.
Q: Why sheep blood added in blood agar preparation does not coagulate prior to its use
A: Introduction:- Sheep blood agar is commonly used to describe haemolytic bacteria for identification…
Q: McConkey agar plate is used to determine which carbohydrates a bacteria can ferment if the…
A: To grow bacteria, required nutrients should be incorporated into the culture media. These culture…
Q: What is the mechanism by which enterococci are able to grow in high salt conditions?
A: The Enterococci are facultative anaerobes, gram-positive coccus that appears to be in short chains…
Q: Which of the letter labeled microbes is exhibiting alpha-hemolysis?
A: The lysis or breakdown of red blood cells is called hemolysis. There are three types of hemolysis…
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 most common gram-negative bacterium that can cause UTI in adults?
A: Microorganisms are rarely seen in urine (germs). Urine could be a consequence of our kidneys'…
Q: Explain why coagulase positive bacteria are more pathogenic than coagulase negative bacteria
A: Coagulase is a protein enzyme produced by several microorganisms that enables the conversion of…
Q: What is the most commonly used fixative in stool samples and why? Why is staining of stool samples…
A: What is the most commonly used fixative in stool samples and why? Why is staining of stool samples…
Q: What method of bacterial measurement does this graph represent? Is it considered direct, or…
A: Here Bacterial growth is measured in terms of absorbance so, bacterial growth is measured with the…
Q: Three of five patients who underwent heart valve replacement surgery developed bacteremia. The…
A: Hello. Since your question has multiple parts, we will solve the first question for you. If you want…
Q: Using this flow chart, a species that is alpha-hemolytic and catalase-negative is…
A: In this question, we are given a dichotomous key for identification of bacteria on the basis of the…
Q: Which is the most common bacteria found in the skin flora and caused catheter-related infections? a)…
A: Bacterial diseases include any type of illness or disease caused by bacteria, a type of microbe.…
Q: How does Pseudomonas aerogenosa contribute to the virulance of the pathogen?
A: Pseudomonas aeruginosa is a bacterium which is liable for serious infectious diseases, chronic…
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: Within a 3-day period at a large hospital, five patients undergoing hemodialysis developed fever and…
A: Given that there were 5 patients undergoing hemodialysis who developed fever and chills. 3 different…
Q: What is an Upper Respiratory Infection (URI)? What are the signs/symptoms of an URI? What are the…
A: The respiratory system of humans consists of the nose, larynx, pharynx, trachea, bronchi, and lungs.…
Q: What are the components of a carbon-free broth or minimum medium for Pseudomonas putida ? An example…
A: The most common growth media, although specialized media are sometimes required for microorganism…
Q: On blood agar whattype of hemolysis. wouldmicrococcuscoseus.have? aBor of it a
A: Micrococcus roseus shows Gamma hemolysis on bloodcagar
Q: what are the selective media for Vibrio cholerae
A: A type of media which allows the growth of only specific microbes or the microbe of interest and…
Q: On blood agar plate. What hemolysis is this? (alpha, beta, gamma)
A: Blood agar is both enriched and differential media that contains 5% of the sheep blood. Blood agar…
Q: Gram negative diplococci inside neutrophils in an eye exudate would be indicative of ---
A: Gram-negative diplococci inside neutrophils in an eye exudate would be indicative of Gonorrhea.
Q: The gram negative unknown organism that is Enterobacter aerogenes? What kind of the shape of…
A: Microbes are minute living creatures that must be identified with specialized scientific equipment…
Q: Please explain the difference between bacteraemia and septicaemia. Can the presence of toxins, fungi…
A: Blood poisoning caused by bacteria is known as septicemia, or sepsis. It's the body's most ferocious…
Q: What is virulence factor in microbiology?
A: The molecules produced by bacteria, viruses, fungi, and protozoa that enable them to invade host,…
Q: What test can be performed to differentiate the enterococci from other group D streptococci?
A: Group D streptococci are separated into enterococcal species, including S. faecalis, S. faecium, and…
Q: Based on the journal article “Interpretation of the Tube Coagulase Test for Identification of…
A: The coagulase test works on the principle that a coagulase enzyme causes the plasma to clot through…
Q: what is the thermal death time? what is the thermal death time for Bacillus subtilis and…
A:
Q: Two tests that were performed to confirm the presence of an alpha hemolysis strain of Strep were the…
A: Hemolysis is breaking down of the haemoglobin where as alpha hemolysis is partially breaking of…
Q: Which of the following is true regarding pathogenic strains of Staphylococcus and Streptococcus,…
A: Staphylococcus are gram-positive cocci that grow in clumps whereas streptococci are also gram…
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…
- What is the principle of the coagulase test result? How does coagulase contribute to the virulence of some bacterial species?
Step by step
Solved in 2 steps
- Which type of hemolysis characterizes Streptococcus pyogenes, the bacterium that causes strep throat?Coagulase is aknown factor in the ability of S. aureus to cause infection. However, coagulases-negative staphylococci may be pathogenic as well. What are some of the factors that contribute to virulence of coagulase-negative bacteria?Klebsiella Pneumoniae produces a capsule: How does klebsiella pneumonia contribute to the virulence of the pathogen?
- How can activity of a hemolytic exotoxin be detected?According to the hemolysis results, how does Bacillus cereus differ from B. subtilis?Based on the journal article “Interpretation of the Tube Coagulase Test for Identification of Staphylococcus aureus”, what should be the result to conclude the organism is S.aureus? When is it necessary to have supplemental tests done for the identification of S.aureus?
- You are working in a lab studying Streptococcus pyogenes as a cause of necrotizing fasciitiis. You have an overnight culture that you want to know the starting concentration of, so do a set of six 1:10 serial dilutions (putting 1 mL from the stock into a 9 mL blank), with tube #1 being 1:10, #2 is 1:100, etc. You plate 0.1 mL from tube 5 onto a blood agar plate and the next morning count 134 colonies. How many bacteria (measured in CFU/mL) were in the overnight culture flask? A. 1.34 x 10^4 CFU/mL B. 1.34 x 10^5 CFU/mL C. 1.34 x 10^6 CFU/mL D. 1.34 x 10^7 CFU/mL E. 1.34 x 10^8 CFU/mL F. cannot tell based on the data given - you'd need to know the volume of the original culture flaskNot only is blood agar an enriched medium that can support fastidious organism growth, but it can also serve as a differential medium in the identification of streptococcal species because of the presence of red blood cells that can be destroyed by an organism's hemolysins. Looking at this photo, how could you describe the organism growing on the surface of this blood agar plate? Multiple Choice a) Gamma-hemolytic b) Alpha-hemolytic c) Non-hemolytic d) Beta-hemolyticIs the Triple-Sugar Iron Agar (TSIA) a complex or defined medium? Explain based on its composition. Is the test tube a A) broth, B) slant, or C) deep agar medium? Why is a “needle” used to inoculate?
- Streptococcus pneumoniae occurs in two colony morphs: smooth and rough. Smooth colonies are virulent and infection of this strain can be lethal. Rough colonies are not virulent. You come across three samples labeled "A", “B" and "C." You inject these samples, singly or in combination, into mice and observe different effects as shown in the table below. You also recover blood samples from each test group to determine if you can isolate bacterial cells. a. Given the assumption that each sample contained only one cell type or extract, what was in each of the samples? b. Explain your answers. Sample Response Type of cells injected of mice A B recovered from blood dead live S cells none none live R cells live S cells live R and live S cells C none A+B dead A+C dead dead B+C А+В+С dead live S cells live S cellsA 65-year-old woman has a long-term central venous catheter for intravenous therapy. She develops fever and subsequently has multiple blood cultures positive for Staphylococcus epidermidis. All of the S. epidermidis isolates have the same colony morphology and antimicrobial susceptibility pattern, suggesting that they are the same strain. In what possible way do you think she has contracted the bacteria? Which link in the chain of infection has broken in this particular scenario and what will be your advice to avoid such infections?Within a 3-day period at a large hospital, five patients undergoing hemodialysis developed fever and chills. Pseudomonas aeruginosa and Klebsiella pnuemoniae were isolated from three of the patients. P. aeruginosa, K. pneumoniae, and Enterobacter agglomerans were isolated from the dialysis system. Why do all three bacteria cause similar symptoms?