Bacteriology Random Questions Question
The science and study of bacteria and their relation to medicine and to other areas such as agriculture is termed as Bacteriology. It is important to study bacteria as they produce the oxygen we breathe and is very important to humans. The quiz below will test out what you understand from the bacteriology class.
- 1.
Pseudomembranous colitis 1.Drugs responsible 2.Organism responsible 3.Treatment
- A.
1.Metronidazole&Vancomycin 2.C.difficle 3.ampicillin & clindamycin
- B.
1.Metronidazole&clindamycin 2.C.difficle 3.ampicillin & Vancomycin
- C.
1.ampicillin & Vancomycin 2.C.difficle 3.Metronidazole& clindamycin
- D.
1.ampicillin & clindamycin 2.C.difficle 3.Metronidazole&Vancomycin
Correct Answer
D. 1.ampicillin & clindamycin 2.C.difficle 3.Metronidazole&VancomycinExplanation
The correct answer is 1. ampicillin & clindamycin, 2. C.difficle, 3. Metronidazole & Vancomycin. Pseudomembranous colitis is caused by the overgrowth of Clostridium difficile (C.difficle) in the colon, often as a result of antibiotic use. Ampicillin and clindamycin are antibiotics that can disrupt the normal gut flora and allow C.difficle to flourish. Metronidazole and Vancomycin are commonly used to treat C.difficle infections. Therefore, the correct answer includes the drugs responsible for causing the condition, the organism responsible, and the appropriate treatment options.Rate this question:
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- 2.
Traveler's diarrhea is caused by
- A.
Enterotoxigenic E. coli (ETEC)
- B.
Enteroaggregative E. coli (EAEC)
- C.
Enteropathogenic E. coli (EPEC)
- D.
Enterohemorrhagic E. coli (EHEC)
- E.
Enteroinvasive E. coli (EIEC)
Correct Answer
A. Enterotoxigenic E. coli (ETEC)Explanation
T for TRate this question:
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- 3.
Organism capable of causing hemolytic uremic syndrome (HUS)
- A.
Enterotoxigenic E. coli O157:H7
- B.
Enteroaggregative E. coli O157:H7
- C.
Enteropathogenic E. coli O157:H7
- D.
Enterohemorrhagic E. coli O157:H7
- E.
Enteroinvasive E. coli O157:H7
Correct Answer
D. Enterohemorrhagic E. coli O157:H7Explanation
Enterohemorrhagic E. coli O157:H7 is capable of causing hemolytic uremic syndrome (HUS). HUS is a condition characterized by the destruction of red blood cells, low platelet count, and kidney failure. Enterohemorrhagic E. coli O157:H7 produces a toxin called Shiga toxin, which damages the cells lining the blood vessels and can lead to HUS. This strain of E. coli is commonly associated with foodborne outbreaks, particularly from contaminated ground beef or raw milk. It is important to note that other strains of E. coli may also cause HUS, but in this case, enterohemorrhagic E. coli O157:H7 is specifically mentioned as the correct answer.Rate this question:
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- 4.
Siderophilic bacteria that can cause infection in people with hemochromatosis are
- A.
Listeria monocytogenes
- B.
Vibrio vulnificus
- C.
Yersinia enterocolica
- D.
Any of the above
Correct Answer
D. Any of the aboveExplanation
The correct answer is "Any of the above". Siderophilic bacteria are those that have an affinity for iron and can cause infections in individuals with hemochromatosis, a condition characterized by excessive iron absorption. Listeria monocytogenes, Vibrio vulnificus, and Yersinia enterocolitica are all examples of siderophilic bacteria that can potentially cause infections in people with hemochromatosis.Rate this question:
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- 5.
Which is the false statement regarding chlamydia ?
- A.
Elementary body is the extracellular form
- B.
Elementary body is the infectious form
- C.
Retiuclate body is the intracellular form
- D.
Retiuclate body is the infectious form
Correct Answer
D. Retiuclate body is the infectious formExplanation
The false statement regarding chlamydia is that the reticulate body is the infectious form. In reality, the elementary body is the infectious form of chlamydia. The elementary body is the extracellular form and is responsible for infecting host cells. The reticulate body, on the other hand, is the intracellular form of chlamydia and is involved in replication within the host cells.Rate this question:
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- 6.
Select the Micro aerophilic organism(s)
- A.
Helicobacter pylori
- B.
Campylobacter
- C.
Both
- D.
None
Correct Answer
C. BothExplanation
Both Helicobacter pylori and Campylobacter are microaerophilic organisms. Microaerophiles are organisms that require low levels of oxygen to survive and grow. They cannot tolerate high levels of oxygen like aerobes, but also cannot survive in the absence of oxygen like anaerobes. Helicobacter pylori is a bacterium that colonizes the human stomach and is associated with various gastrointestinal diseases. Campylobacter is a genus of bacteria that can cause foodborne illnesses in humans. Both of these organisms have adapted to survive in environments with low oxygen levels, making them microaerophilic.Rate this question:
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- 7.
Most common cause of Acute osteomyelitis is
- A.
Staph., aureus
- B.
Streptococcus
- C.
Salmonella
- D.
Pseudomonas
Correct Answer
A. StapH., aureusExplanation
The most common cause of acute osteomyelitis is Staphylococcus aureus. Staphylococcus aureus is a type of bacteria that commonly resides on the skin and can enter the body through a cut or wound, leading to infection in the bones. It is known to be a major cause of osteomyelitis, especially in children. Other bacteria such as Streptococcus, Salmonella, and Pseudomonas can also cause osteomyelitis, but they are less common compared to Staphylococcus aureus.Rate this question:
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- 8.
Naegler’s reaction is seen in C.perfringens. Toxin responsiple is
- A.
Alpha
- B.
Beta
- C.
Gamma
- D.
Delta
Correct Answer
A. AlpHaExplanation
alpha or LecithinaseRate this question:
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- 9.
Satellitism is seen in
- A.
Staph., aureus
- B.
H.influenzae
- C.
Salmonella
- D.
Pseudomonas
Correct Answer
B. H.influenzaeExplanation
Satellitism is a phenomenon where a bacterium requires the presence of another bacterium for its growth. In the case of H.influenzae, it requires the presence of Staphylococcus aureus for its growth. This is because H.influenzae lacks the ability to produce certain essential growth factors, such as NAD (nicotinamide adenine dinucleotide), on its own. Staphylococcus aureus can produce and release NAD into the surrounding environment, which H.influenzae can then utilize for its growth. This relationship between the two bacteria is an example of satellitism.Rate this question:
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- 10.
In O157:H7, what does 'O' indicate ?
- A.
Flagellar protein
- B.
Cell wall lipopolysaccharide
- C.
Peptidoglycan matrix
- D.
Capsular polysaccharide
Correct Answer
B. Cell wall lipopolysaccharideExplanation
The 'O' in O157:H7 indicates the presence of cell wall lipopolysaccharide. Lipopolysaccharide is a major component of the outer membrane of Gram-negative bacteria, including Escherichia coli O157:H7. It plays a crucial role in maintaining the structural integrity of the cell wall and also acts as an endotoxin, triggering an immune response in the host. Therefore, the presence of cell wall lipopolysaccharide is indicated by the 'O' in the O157:H7 strain.Rate this question:
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- 11.
Character of a bacterial capsule is
- A.
All bacteria have a capsule
- B.
It is always composed of peptidoglycan
- C.
It is an important protective mechanism
- D.
It is responsible for gram stain reaction
Correct Answer
C. It is an important protective mechanismExplanation
The bacterial capsule is an important protective mechanism for bacteria. It is a layer of polysaccharides or glycoproteins that surrounds the bacterial cell wall. The capsule helps bacteria to evade the host immune system by preventing phagocytosis, as well as providing protection against desiccation, antimicrobial agents, and environmental stresses. It also plays a role in the adherence of bacteria to surfaces and the formation of biofilms. The composition of the capsule can vary among different bacterial species, and it is not always composed of peptidoglycan. The gram stain reaction, on the other hand, is determined by the structure of the bacterial cell wall, not the capsule.Rate this question:
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- 12.
Which bacterial capsule is madeup of amino acids ?
- A.
Bacillus anthracis
- B.
Pneumococcus
- C.
H.infuluenza
- D.
Neisseria
Correct Answer
A. Bacillus anthracisExplanation
Bacillus anthracis is the correct answer because its capsule is made up of amino acids. The bacterial capsule is a protective layer outside the cell wall, and it is composed of various substances including polysaccharides, proteins, and amino acids. In the case of Bacillus anthracis, its capsule is primarily composed of amino acids. This capsule helps the bacterium evade the host's immune system and contributes to its pathogenicity.Rate this question:
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- 13.
Food poisoning associated with chinese restaurant fried rice
- A.
Bacillus cereus
- B.
Salmonella
- C.
Staph., aureus
- D.
Vibrio parahemolyticus
Correct Answer
A. Bacillus cereusExplanation
Bacillus cereus is a type of bacteria commonly found in soil and food. It can produce toxins that cause food poisoning when ingested. This bacterium is often associated with fried rice dishes from Chinese restaurants, as it can survive and multiply in cooked rice that is left at room temperature for too long. Symptoms of Bacillus cereus food poisoning include nausea, vomiting, abdominal cramps, and diarrhea. Therefore, Bacillus cereus is the most likely cause of food poisoning in this scenario.Rate this question:
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- 14.
Castaneda method is used for
- A.
Actinomyces
- B.
Brucella
- C.
Clostridum
- D.
V.Cholerae
Correct Answer
B. BrucellaExplanation
The Castaneda method is used for Brucella. This method involves the use of selective media, such as Farrell's medium or Castaneda's medium, which provide optimal conditions for the growth and isolation of Brucella bacteria. These media contain specific nutrients and inhibitors that suppress the growth of other bacteria and allow for the selective growth of Brucella. By using this method, Brucella can be successfully isolated and identified from clinical samples, aiding in the diagnosis and treatment of brucellosis, a bacterial infection caused by Brucella species.Rate this question:
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- 15.
True about oedema factor component of anthrax toxin is
- A.
Inhibits ADP ribosylation of elongation factor
- B.
Adenylate cyclase
- C.
Binds to the target cell receptor
- D.
None of the above
Correct Answer
B. Adenylate cyclaseExplanation
The correct answer is Adenylate cyclase. Oedema factor is a component of anthrax toxin that acts as an adenylate cyclase enzyme. It catalyzes the conversion of ATP to cyclic AMP (cAMP) within the host cell, leading to an increase in cAMP levels. This increase in cAMP disrupts cellular signaling pathways and impairs the immune response, contributing to the pathogenicity of anthrax.Rate this question:
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- 16.
Gas Gangrene is caused by
- A.
Cl., perfringens
- B.
Cl., novyi
- C.
Cl., septicum
- D.
Cl., histolyticum
- E.
All of the above
Correct Answer
E. All of the aboveExplanation
Gas gangrene is a severe and potentially life-threatening infection caused by certain species of Clostridium bacteria. These bacteria are known to produce toxins that destroy tissue and create gas bubbles in the infected area. Cl. perfringens, Cl. novyi, Cl. septicum, and Cl. histolyticum are all species of Clostridium that can cause gas gangrene. Therefore, the correct answer is "All of the above" as all of these species can lead to the development of gas gangrene.Rate this question:
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- 17.
Tetanolysin is the toxin responsible for tetanus.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Tetanospasmin is the toxin responsible for tetanus. Tetanolysin is hemolytic.Rate this question:
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- 18.
Receptor for Cholera Toxin on epithelial cell is
- A.
GM1 ganglioside
- B.
GM2 ganglioside
- C.
GM3 ganglioside
- D.
GM4 ganglioside
Correct Answer
A. GM1 gangliosideExplanation
GM1 ganglioside is the receptor for Cholera Toxin on epithelial cells. Cholera toxin binds to GM1 ganglioside on the cell surface, allowing the toxin to enter the cell. Once inside, the toxin activates adenylate cyclase, leading to increased cyclic AMP levels and subsequent secretion of chloride ions and water into the intestinal lumen, resulting in the characteristic watery diarrhea seen in cholera infection.Rate this question:
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- 19.
False regarding Bacteroides fragilis
- A.
B. fragilis is the frequently isolated anaerobe from clinical samples.
- B.
B. fragilis is not uniformly sensitive to metronidazole
- C.
The lipopolysaccharide formed by B. fragilis is structurally and functionally different from the conventional endotoxin
- D.
Shock and DIC are common in Bacreriodes bacteremia
Correct Answer
D. Shock and DIC are common in Bacreriodes bacteremiaExplanation
Frequently asked question !!Rate this question:
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- 20.
Which of the following bacterial diarrhoea is not associated with toxin ?
- A.
Staphylococcus aureus
- B.
Vibrio cholerae
- C.
Shigella
- D.
Vibrio parahaemolyticus
Correct Answer
D. Vibrio parahaemolyticusExplanation
Vibrio parahaemolyticus directly invade the epithelium.Rate this question:
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- 21.
Test done with salmonella to prove the mutagenic nature of carcinogens is
- A.
Colicin typing
- B.
Bacteriophage
- C.
Redox test
- D.
Ames test
Correct Answer
D. Ames testExplanation
The Ames test is a widely used method to determine the mutagenic nature of chemicals or substances. It involves exposing a strain of Salmonella bacteria to a potential mutagen and observing whether it causes genetic mutations in the bacteria. If the substance being tested is mutagenic, it will cause mutations in the bacteria's DNA, which can be detected through various genetic markers. The Ames test is an important tool in assessing the potential carcinogenicity of substances and is commonly used in toxicology and cancer research.Rate this question:
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- 22.
LCL (Levinthal-Cole-Lillie) bodies are seen in infection with
- A.
Chlamydophila psittaci
- B.
Chlamydia trachomatis
- C.
Chlamydia psittaci
- D.
All of the above
Correct Answer
A. ChlamydopHila psittaciExplanation
LCL (Levinthal-Cole-Lillie) bodies are seen in infection with Chlamydophila psittaci.Rate this question:
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- 23.
Sereny test is done for
- A.
Enterotoxigenic E. coli (ETEC)
- B.
Enteroaggregative E. coli (EAEC)
- C.
Enteropathogenic E. coli (EPEC)
- D.
Enterohemorrhagic E. coli (EHEC)
- E.
Enteroinvasive E. coli (EIEC)
Correct Answer
E. Enteroinvasive E. coli (EIEC)Explanation
The Sereny test is performed to determine the invasiveness of enteroinvasive E. coli (EIEC) strains. EIEC is known to invade and multiply within the intestinal epithelial cells, causing invasive diarrhea. The Sereny test involves inoculating the bacteria onto the conjunctiva of guinea pigs and observing for the development of keratoconjunctivitis, which is characteristic of EIEC infection. This test helps in differentiating EIEC from other pathogenic E. coli strains that do not exhibit invasiveness.Rate this question:
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- 24.
Splenectomised patients more prone to infection with
- A.
Pneumococcus
- B.
Meningococcus
- C.
H. infulenza
- D.
All of the above
Correct Answer
D. All of the aboveExplanation
Splenectomised patients more prone to infection with CAPSULATED organism.Rate this question:
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- 25.
Which is NOT a HACEK group of organism
- A.
Haemophilus aphrophilus
- B.
Acenetobacter boumani
- C.
Cardiobacterium hominis
- D.
Eikenella corrodens
Correct Answer
B. Acenetobacter boumaniExplanation
Acenetobacter boumani is not a member of the HACEK group of organisms. The HACEK group is a group of bacteria that are commonly associated with infective endocarditis, a serious infection of the heart valves. The HACEK group includes Haemophilus aphrophilus, Cardiobacterium hominis, and Eikenella corrodens, but not Acenetobacter boumani.Rate this question:
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- 26.
Y. pseudotuberculosis causes
- A.
Reactive arthritis
- B.
Mesenteric adenitis
- C.
Appendicitis like clinical picture
- D.
Any of the above
Correct Answer
D. Any of the aboveExplanation
Y. pseudotuberculosis can cause reactive arthritis, mesenteric adenitis, and an appendicitis-like clinical picture. This means that it can lead to any of these conditions. Reactive arthritis is an inflammatory joint condition that can occur after an infection, mesenteric adenitis is inflammation of the lymph nodes in the abdomen, and an appendicitis-like clinical picture refers to symptoms similar to those of appendicitis. Therefore, Y. pseudotuberculosis can cause any of these conditions.Rate this question:
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- 27.
Buruli ulcer is caued by
- A.
Mycobacterium ulcerans
- B.
Peptostreptococcus
- C.
S. aureus
- D.
S. aureus & peptostreptococcus
Correct Answer
A. Mycobacterium ulceransExplanation
Buruli ulcer is caused by Mycobacterium ulcerans. This bacterium is known to produce a toxin called mycolactone, which damages the skin and subcutaneous tissues, leading to the development of ulcers. Peptostreptococcus and S. aureus are not associated with Buruli ulcer. Therefore, the correct answer is Mycobacterium ulcerans.Rate this question:
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Mar 21, 2023Quiz Edited by
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Jun 05, 2012Quiz Created by
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