Q: Name the enzymes produced by the members of the oral microbial flora.
A: Streptococci, Neisseria, Fusobacterium, Prevotella, and other anaerobic bacteria are the members of…
Q: How can activity of a hemolytic exotoxin be detected?
A: Introduction Toxins can be of two type on the basis of their secretion viz. Endotoxins and…
Q: How do the methyl-red and Voges-Proskauer tests differentiate between certain members of the…
A: Methyl-red and Voges-Proskauer tests are used to differentiate between certain members of the…
Q: Give a trivia about the Methicillin-resistant Staphylococcus aureus (MRSA)?
A: MRSA means methicillin-resistant Staphylococcus aureus. MRSA is a "staph" microorganism that doesn't…
Q: Describe the differential property of blood agar for the isolation and identification of…
A: Blood agar is the medium containing general nutrients and 5% sheep blood. Staphylococci are…
Q: Determine the optimal pH (or range of pH) for: Escherichia coli and Staphylococcus aureus
A: Several factors like temperature, pH ,food etc determine the growth and survival of an organism.
Q: What are all the different types of infections the following antibiotic resistant microbes…
A: Antibiotic resistance in bacteria occurs when germs like bacteria develop the ability to defeat the…
Q: Account for the ability of streptococci to tolerate O2 in the absenceof catalase activity
A: Bacteria are prokaryotic organisms that have an undefined nucleus and nuclear membrane. Most of the…
Q: With the involvement of bacterial enzymes, explain the rationale behind Helicobacter pylori using…
A: Helicobacter pylori is a ureolytic, neutralophilic, gram-negative bacteria that can colonize the…
Q: (b) Bacteria strain that can grow in the presence of streptomycin.
A:
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: explain
A: The beta hemolytic bacteria are the bacterias that causes complete hemolysis of the RBC in the blood…
Q: Compare and contrast the mode of action of tetanus and botulinum toxins.
A: Introduction The toxins are small peptide molecules that can cause disease after contact with 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: Salmonella typhi is a facultative anaerobe. Explain why.
A: Salmonella is a genus of Gram-negative bacteria that are rod-shaped (bacillus) and belong to the…
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 does the E. coli strain 026:H11 damage its victims?
A: The enterohaemorrhagic E. coli (EHEC) serotype O26 is the second most common enterohaemorrhagic E.…
Q: Between Enterobacter aerogenes and Enterobacter cloacae, which are positive or negative for…
A: The result is shown below.
Q: Explain why sulfa drugs prevent bacterial growth without harming the human host.
A: Antimicrobial drugs are those which destroy or inhibit the growth of microorganism. They have their…
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: what is the media for mycobacterium tuberculosis?
A: Mycobacterium tuberculosis is a pathogenic bacteria that cause infection related to the lungs. they…
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: Describe result for gram reaction of staphylococcus capitis
A: Staphylococcus capitis is a CoNS (Coagulase-negative species) of the genus, Staphylococcus. It has…
Q: State whether Bacillus cereus, Bacillus megaterium, Bacillus sphaericus, and Bacillus subtilis are…
A: Bacteria structure is very simple but they are vary complex in behaviour. It is the group which…
Q: List the major physiological properties of the genus Bacteroides.
A: The Gram-negative, obligate anaerobic bacteria that is known to act as the fecal indicator organism…
Q: Identify a biochemical test that can differentiate Enterobacter agglomerans from Enterobacter…
A: Enterobacter cloacae is a part of the normal gut flora of humans and usually, it is not considered a…
Q: Name the biochemical tests commonly used to differentiatecommon opportunistic enterics.
A: Due to similarities between the enterics, a series of tests are performed in order to distinguish…
Q: what treatment can kill the positive result of staphylococcus aureus in a catalase method ?
A: If an organism produces catalase enzyme, then it is able to breakdown hydrogen peroxide into water…
Q: How was the product of streptomycin isolated by the scientist who discovered this?
A: Streptomycin was first discovered by the American biochemists Selman Walksman,Albert Schatz and…
Q: Describe the growth of Staphylococcus aureus and Saccharomyces cerevisiae at low pH (3-3.5).
A: Answer: Introduction: Staphylococcus aureus is responsible for food intoxication in humans by making…
Q: Is the pH level of antibacterial soap higher, lower, or the same as H. influenzae, S. aureus and S.…
A: Antibacterial soap These are the soaps which have chemical ingredients that have the ability to…
Q: Name the biochemical tests commonly used to diff erentiate common opportunistic enterics.
A: Enterobacteriaceae is a large family of the gram-negative, non-spore forming, rod-shaped,…
Q: Explain about Haemophilus influenzae ?
A: Haemophilus influenzae causes different types of bacterial infections.This bacteria may cause mild…
Q: All of the following microorganisms contains the enzyme catalase except?
A: Answer - Option D - Obligate anaerobes
Q: What is the effect of treatment of CER cells with chloroquine? Explain.
A: General Concepts Clinical Manifestations Rabies virus causes acute infection of the central nervous…
Q: Give the genus and species of five bacteria in the family Enterobacteriaceae .
A: In the hierarchy of biological organisation, genus is the one which comes above species and below…
Q: Phenylalanine Deaminase: Q17) Give me the expected results for Proteus mirabilis and Staphylococcus…
A: Phenylalanine Deaminase This test is used to identify the ability of an organism to generate the…
Q: State whether Staphylococcus epidermidis and Staphylococcus aureus are negative or positive for…
A: Staphylococcus epidermis and Staphylococcus aureus are two pathogens of staphylococci. Here we will…
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: Discuss the unique capacity of the Deinococci to tolerate desiccation and high doses of radiation
A: Answer: Introduction: Deinococcus radiodurans is a high temperature and radiation resistant…
Q: Between Bacillus megaterium, Bacillus sphaericus, and Bacillus subtilis which are positve and which…
A: oxidase test in microbiology is the best that is used for the determination of an organism that…
Q: How did Staphylococcus aureus become methicillin resistant?
A: S. aureus, a member of the family Micrococcaceae is a gram-positive. It is an opportunist pathogen…
Q: Identify two antimicrobials that act by inhibiting protein synthesis.
A: A protein synthesis inhibitor is a substance that prevents or inhibits cell growth or proliferation…
List the most clinically significant pathogens in the genus Staphylococcus,
and identify the species that is defined by production of
coagulase.
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- Identify the causative agent of staphylococcal food poisoning and explain the method for transmission of the bacteria to food sources. Describe the characteristics of the staphylococcal toxin.Describe the growth of Staphylococcus aureus and Saccharomyces cerevisiae at low pH (3-3.5).A child presents with yellow crusting lesions on the arms and legs. It is determined that this is being caused by Streptococcus pyogenes. In what ways is the organism Streptococcus pyogenes different from Staphylococcus aureus?
- Why can Koch’s postulates not be used to identify the causes of diseases due to polymicrobial infections?How does tuberculosis pathogen deal with the toxic effect of oxygen? since toxic forms of oxygen occur as a part of metabolism. Name the enzymes discussed if Mycobacterium tuberculosis pathogen has themWhich of the following about Staphylococcus aureus is false?a) It is generally coagulase-positive.b) Its infectious dose is increased in the presence of foreign material.c) Some strains infecting wounds can cause toxic shock.d) Nasal carriers have an increased the risk of surgical wound infection.e) It is pyogenic.
- In bone marrow culture, immobile, non-hemolyzed, oxidase, catalase, and urease positive gram negative cocobacillar were detected. Which of the following is the most likely factor in this patient?a) Legionella pneumophilab) Brucella mellitensisc) Bordetella bronchisepticad) Salmonella typhimuriume) Stenotrophomonas maltophiliaState whether Staphylococcus epidermidis and Staphylococcus aureus are negative or positive for caseinase production.The general public takes for granted the link between an infectious agent and a given infection Discuss the requirements established by Koch, the nineteenth-century German scientist, before ascertaining, for instance, that Helicobacter pylori bacterium is the cause of the gastric ulcer. Why is it so essential to meet these conditions?