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Questions and Answers
What is the selective medium for isolating β-haemolytic streptococci?
What is the selective medium for isolating β-haemolytic streptococci?
What is the generation time of Escherichia coli?
What is the generation time of Escherichia coli?
Which flea is responsible for transmitting bubonic plague?
Which flea is responsible for transmitting bubonic plague?
What is the main transmission method of pneumonic plague between humans?
What is the main transmission method of pneumonic plague between humans?
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Which organism is responsible for causing plague?
Which organism is responsible for causing plague?
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How do humans most frequently become infected with Mycobacterium tuberculosis?
How do humans most frequently become infected with Mycobacterium tuberculosis?
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What does the medusa head appearance of colonies indicate?
What does the medusa head appearance of colonies indicate?
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The role of bacterial capsules in virulence is primarily related to their ability to interfere with which process?
The role of bacterial capsules in virulence is primarily related to their ability to interfere with which process?
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Which of the following is a carrier of infection for the plague?
Which of the following is a carrier of infection for the plague?
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What is the causative agent of anthrax classified under?
What is the causative agent of anthrax classified under?
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Which microorganisms are obligate aerobes?
Which microorganisms are obligate aerobes?
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Which of these bacteria are classified as obligate anaerobes?
Which of these bacteria are classified as obligate anaerobes?
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What is the optimum selective nutrient medium for inoculating material from a patient with gas gangrene?
What is the optimum selective nutrient medium for inoculating material from a patient with gas gangrene?
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Gas gangrene bacilli are categorized as which type of bacteria?
Gas gangrene bacilli are categorized as which type of bacteria?
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Which of the following statements about Chlamydia trachomatis is true?
Which of the following statements about Chlamydia trachomatis is true?
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What characteristic is unique to the Mycoplasma bacterial group?
What characteristic is unique to the Mycoplasma bacterial group?
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Which species of microbes in the intestine produce essential vitamins for the human body such as B1, B2, B12, and K?
Which species of microbes in the intestine produce essential vitamins for the human body such as B1, B2, B12, and K?
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What type of microbes can be identified from red colonies with a metallic shine on Endo medium?
What type of microbes can be identified from red colonies with a metallic shine on Endo medium?
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Where can spores of bacilli be located?
Where can spores of bacilli be located?
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What organism is indicated by dark red colonies with metallic shine that are gram-negative, small, straight rods in a patient previously diagnosed with cholera?
What organism is indicated by dark red colonies with metallic shine that are gram-negative, small, straight rods in a patient previously diagnosed with cholera?
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What does the first word in the name of microorganisms signify?
What does the first word in the name of microorganisms signify?
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Which vaccine is used for the prevention of diphtheria?
Which vaccine is used for the prevention of diphtheria?
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What is the main carrier site of potentially pathogenic Staphylococcus aureus in the human body?
What is the main carrier site of potentially pathogenic Staphylococcus aureus in the human body?
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What is a major difference between EHEC and EPEC?
What is a major difference between EHEC and EPEC?
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Which statement regarding HIV is not true?
Which statement regarding HIV is not true?
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CMV retinitis in HIV patients occurs when the CD4 counts fall below which number?
CMV retinitis in HIV patients occurs when the CD4 counts fall below which number?
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Which statement about HIV infection is not true?
Which statement about HIV infection is not true?
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Reverse transcriptase sequence in HIV is best described as?
Reverse transcriptase sequence in HIV is best described as?
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Multifocal tumor of vascular origin in a patient with AIDS is most likely?
Multifocal tumor of vascular origin in a patient with AIDS is most likely?
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In a patient with HIV who presents with diarrhea and AFB positive organisms in stool, the most likely organism is?
In a patient with HIV who presents with diarrhea and AFB positive organisms in stool, the most likely organism is?
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Which investigation is best to rule out HIV in a patient with recent symptoms and sexual contact?
Which investigation is best to rule out HIV in a patient with recent symptoms and sexual contact?
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When compared to the Western blot technique, the ELISA test is described as?
When compared to the Western blot technique, the ELISA test is described as?
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Which statement about monkeypox virus is the most accurate?
Which statement about monkeypox virus is the most accurate?
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What best describes the currently licensed vaccinia (smallpox) vaccines?
What best describes the currently licensed vaccinia (smallpox) vaccines?
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Which option does not describe a key aspect of vaccinia virus replication in cultured cells?
Which option does not describe a key aspect of vaccinia virus replication in cultured cells?
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Which condition is NOT benefited by treatment with vaccinia immune globulin?
Which condition is NOT benefited by treatment with vaccinia immune globulin?
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Which of the following does NOT fulfill the exposure criteria to vaccinia?
Which of the following does NOT fulfill the exposure criteria to vaccinia?
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Which potential complication from smallpox vaccination is characterized as beneficial to vaccinia immune globulin therapy?
Which potential complication from smallpox vaccination is characterized as beneficial to vaccinia immune globulin therapy?
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In terms of leaping through the defense of the immune system, which characteristic of monkeypox is considered significant?
In terms of leaping through the defense of the immune system, which characteristic of monkeypox is considered significant?
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What phenomenon is typically observed in the relation between smallpox and monkeypox in human infection scenarios?
What phenomenon is typically observed in the relation between smallpox and monkeypox in human infection scenarios?
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Which statement about dengue virus is not true?
Which statement about dengue virus is not true?
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Which disease occurring in the United States lacks a known vector?
Which disease occurring in the United States lacks a known vector?
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Which statement about yellow fever is false?
Which statement about yellow fever is false?
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Which statement is correct regarding hantaviruses in the United States?
Which statement is correct regarding hantaviruses in the United States?
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What is the most common adverse reaction after vaccinia vaccination?
What is the most common adverse reaction after vaccinia vaccination?
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Which poxvirus infects only humans?
Which poxvirus infects only humans?
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What characteristic distinguishes St. Louis encephalitis from other similar diseases?
What characteristic distinguishes St. Louis encephalitis from other similar diseases?
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Study Notes
Microbiology, Bacteriology, and Virology Exam Questions (2024-2025)
- Live vaccines contain attenuated bacteria.
- Killed corpuscular vaccines contain inactivated bacteria.
- Subunit vaccines contain immunogenic components of the bacteria.
- Immunofluorescence test is a serological reaction using labels.
- Standard quantitative method includes both slide and tube agglutination methods.
- The interaction between somatic antigens and antibodies results in rapid, large flocculi in 2-4 hours, which break down upon shaking.
- Agglutinogen is the antigen that causes agglutination.
- Epidemic diseases spread rapidly, involving many people in an area at the same time.
- Plasma cells produce antibodies.
Additional Exam Questions
- Attenuated vaccines include those for dysentery, cholera, and polio (Salk).
- Best antigens are proteins.
- Natural killer cells are large granular lymphocytes of the innate immune system.
- Exotoxins are active in minute doses and have specific tissue affinities.
- Cross infections are subsequent infections with the same organism in a host.
- Pandemic diseases spread through many areas of the world, involving many people in a short period.
- Transcription is the process where genetic information in bacterial DNA is transferred to mRNA.
- Gene is a segment of DNA coding for a polypeptide.
- Transformation is the transfer of genetic information through free DNA.
- Plasmid is a genetic element outside the bacterial chromosome.
- Translation is the process where genetic information in mRNA is used to synthesize a protein.
- Replication is the process of producing identical copies of DNA.
- R-plasmids determine the production of toxins.
- Col-plasmids determine the production of colicins.
- F-plasmids determine the production of enzymes.
- Transcription is the process of creating mRNA from DNA.
- Mutation is a change in the DNA sequence, resulting in a heritable variation.
- Salt agar contains 1-2%, 3-4%, 5-6%, or 7-10% sodium chloride.
- Streptococci are Gram-positive cocci, arranged in chains.
- Meningococci are Gram-negative cocci, arranged in pairs.
- Vibrio cholerae optimum pH for growth is 8.2.
- Bacterial genera that produce endospores include Bacillus, Clostridium, Corynebacterium, and Mycobacterium.
- Gram-positive bacterial cell walls mainly consist of peptidoglycan and teichoic acids.
- Gram-negative bacterial cell walls have an outer membrane containing lipopolysaccharide (LPS)
- Cocci are spherical bacteria.
- Bacilli are rod-shaped bacteria.
- Spiral bacteria include spirochetes and vibrios.
- Gram-positive bacteria appear purple after Gram staining.
- Gram-negative bacteria appear pink after Gram staining.
- 70S procaryotic ribosomes consist of a 50S and a 30S subunit.
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Description
Test your knowledge on various pathogens, their transmission methods, and the laboratory techniques used for their isolation. This quiz covers a range of topics like β-haemolytic streptococci, plague transmission, and bacterial classifications. Ideal for microbiology students and enthusiasts.
