Multiple Choice Questions on Gram-Positive, Spore-Forming Rods
1) All of the following are the general characteristics of Bacilli spp, Except
a) Anaerobes
b) Gram-positive
c) Spore-forming
d) Ubiquitous
2) Which one of the following Bacillus spp is NOT a frequently isolated pathogenic bacteria?
a) Bacillus cereus
b) Bacillus thuringiensis
c) Bacillus thermophilus
d) Bacillus anthracis
3) Bacillus.............is commonly found in soil and is an insect pathogen that can infect humans also. This organism is often used as pest control in insecticidal products.
a) thuringiensis
b) subtilis
c) anthracis
d) cereus
4) Most of the species of Bacilli and Clostridia are.............., which means they obtain their nutrients from dead or organic matter.
a) Parasites
b) Saprophytes
c) Symbiotic
d) Mutualistic
5) Bacillus anthracis is a medically important spore-forming rod that may cause the disease "anthrax" in animals and humans. What are the two important virulence factors of this organism?
a) Capsule and enterotoxins
b) Exotoxins and enterotoxins
c) Endotoxins and capsule
d) Capsule and exotoxins
6) Bacillus cereus causes two types of foodborne intoxications, known as the emetic type and diarrheal type of infections. Which of the following is the approximate time period for the symptoms to appear after the ingestion of contaminated food?
a) 1-12 hours
b) 1-2 days
c) 1-5 hours
d) 1-24 hours
7) Bacillus….......is a common laboratory contaminant and is used for sterility testing. It is an endospore-forming bacteria and resistant to extreme environmental conditions.
a) subtilis
b) thermophilus
c) cereus
d) agalactiae
8) Which of the following species of Clostridia do not have flagella, but rapidly grows on nutrient media and mimics the growth of motile organisms?
a) Clostridium botulinum
b) Clostridium perfringens
c) Clostridium tetani
d) Clostridium difficile
9) All of the following is the type of infections caused by Clostridium perfringens, EXCEPT?
a) Gas gangrene
b) Food poisoning
c) Cellulitis
d) None of the above
10) The AVA BioThrax is the FDA approved vaccines for
a) Bacillus cereus
b) Clostridium tetani
c) Bacillus anthrax
d) Bacillus substilis
11) The shape and position of spores vary in different types of species and are useful in the identification of Clostridia. Clostridium perfringens forms subterminal spores whereas Clostridium....... forms terminal spores.
a) tetani
b) botulinum
c) cereus
d) None of the above
12) .................can cause infections in human through a puncture wound and ultimately enter the central nervous system by releasing a potent toxin known as neurotoxins, thus blocking the release of neurotransmitters and resulting in cramping of muscles, causing loc jaw and other muscle-related spasms.
a) Bacillus anthracis
b) Clostridium botulinum
c) Clostridium tetani
d) Bacillus subtilis
13) Which is the most common food associated with infant botulism?
a) Maple syrup
b) Honey
c) Canned baby food
d) Corn syrup
14) Name the most potent toxin produced by Clostridium botulinum and C.tetani
a) Aflatoxin
b) Exotoxins
c) Cytotoxin
d) Neurotoxin
15) Bacillus cereus secretes.........................in the intestines and cause foodborne illness in humans
a) Cytotoxins
b) Neurotoxins
c) Enterotoxins
d) Pneumolysin
16) All of the following statements about Bacillus anthracis are true, EXCEPT
a) Form hemolytic colonies on blood agar
b) Causes severe infections in animals
c) A non-motile gram-positive rod
d) It consists of the capsule
17) Which of the following is the most correct general characteristic of Clostridia spp
a) Grows well in Nutrient agar
b) Produce alpha-hemolytic colonies
c) Grows in aerobic conditions
d) Produces neurotoxins
18) Clostridium botulinum associated foodborne illness can occur within 18-24 hours of ingestion of a food that contains toxin. Which of the following are NOT the common symptoms which appear after consuming the C.botulinum toxin?
a) Poor vision
b) Fever
c) Difficulty swallowing
d) Bulbar paralysis
19) All of the following are the preventive measures for Tetanus, EXCEPT
a) Active immunization of toxoids
b) Prophylactic use of antitoxin
c) Administration of Bacitracin
d) None of the above
20) Clostridium perfringens toxins are released only after entering the host cell through wounds or from the intestinal tract, which of the following also known as the alpha toxin can damage the cell membranes ultimately resulting in hemolysis and tissue destruction?
a) Lecithinase
b) Enterotoxin
c) Alpha
d) Beta
Multiple Choice Answers
1-a)
2-c)
3-a)
4-b)
5-d)Capsule and exotoxins
6)-c,
7-a)subtilis
8)-b,
9)-d,
10)-c
11)- a,
12)- c,
13)-b,
14)-d,
15)-c,
16)-a,
17-d) Produces neurotoxins
18)-b,
19)-c,
20)-a
a) Anaerobes
b) Gram-positive
c) Spore-forming
d) Ubiquitous
2) Which one of the following Bacillus spp is NOT a frequently isolated pathogenic bacteria?
a) Bacillus cereus
b) Bacillus thuringiensis
c) Bacillus thermophilus
d) Bacillus anthracis
3) Bacillus.............is commonly found in soil and is an insect pathogen that can infect humans also. This organism is often used as pest control in insecticidal products.
a) thuringiensis
b) subtilis
c) anthracis
d) cereus
4) Most of the species of Bacilli and Clostridia are.............., which means they obtain their nutrients from dead or organic matter.
a) Parasites
b) Saprophytes
c) Symbiotic
d) Mutualistic
5) Bacillus anthracis is a medically important spore-forming rod that may cause the disease "anthrax" in animals and humans. What are the two important virulence factors of this organism?
a) Capsule and enterotoxins
b) Exotoxins and enterotoxins
c) Endotoxins and capsule
d) Capsule and exotoxins
6) Bacillus cereus causes two types of foodborne intoxications, known as the emetic type and diarrheal type of infections. Which of the following is the approximate time period for the symptoms to appear after the ingestion of contaminated food?
a) 1-12 hours
b) 1-2 days
c) 1-5 hours
d) 1-24 hours
7) Bacillus….......is a common laboratory contaminant and is used for sterility testing. It is an endospore-forming bacteria and resistant to extreme environmental conditions.
a) subtilis
b) thermophilus
c) cereus
d) agalactiae
8) Which of the following species of Clostridia do not have flagella, but rapidly grows on nutrient media and mimics the growth of motile organisms?
a) Clostridium botulinum
b) Clostridium perfringens
c) Clostridium tetani
d) Clostridium difficile
9) All of the following is the type of infections caused by Clostridium perfringens, EXCEPT?
a) Gas gangrene
b) Food poisoning
c) Cellulitis
d) None of the above
10) The AVA BioThrax is the FDA approved vaccines for
a) Bacillus cereus
b) Clostridium tetani
c) Bacillus anthrax
d) Bacillus substilis
11) The shape and position of spores vary in different types of species and are useful in the identification of Clostridia. Clostridium perfringens forms subterminal spores whereas Clostridium....... forms terminal spores.
a) tetani
b) botulinum
c) cereus
d) None of the above
12) .................can cause infections in human through a puncture wound and ultimately enter the central nervous system by releasing a potent toxin known as neurotoxins, thus blocking the release of neurotransmitters and resulting in cramping of muscles, causing loc jaw and other muscle-related spasms.
a) Bacillus anthracis
b) Clostridium botulinum
c) Clostridium tetani
d) Bacillus subtilis
13) Which is the most common food associated with infant botulism?
a) Maple syrup
b) Honey
c) Canned baby food
d) Corn syrup
14) Name the most potent toxin produced by Clostridium botulinum and C.tetani
a) Aflatoxin
b) Exotoxins
c) Cytotoxin
d) Neurotoxin
15) Bacillus cereus secretes.........................in the intestines and cause foodborne illness in humans
a) Cytotoxins
b) Neurotoxins
c) Enterotoxins
d) Pneumolysin
16) All of the following statements about Bacillus anthracis are true, EXCEPT
a) Form hemolytic colonies on blood agar
b) Causes severe infections in animals
c) A non-motile gram-positive rod
d) It consists of the capsule
17) Which of the following is the most correct general characteristic of Clostridia spp
a) Grows well in Nutrient agar
b) Produce alpha-hemolytic colonies
c) Grows in aerobic conditions
d) Produces neurotoxins
18) Clostridium botulinum associated foodborne illness can occur within 18-24 hours of ingestion of a food that contains toxin. Which of the following are NOT the common symptoms which appear after consuming the C.botulinum toxin?
a) Poor vision
b) Fever
c) Difficulty swallowing
d) Bulbar paralysis
19) All of the following are the preventive measures for Tetanus, EXCEPT
a) Active immunization of toxoids
b) Prophylactic use of antitoxin
c) Administration of Bacitracin
d) None of the above
20) Clostridium perfringens toxins are released only after entering the host cell through wounds or from the intestinal tract, which of the following also known as the alpha toxin can damage the cell membranes ultimately resulting in hemolysis and tissue destruction?
a) Lecithinase
b) Enterotoxin
c) Alpha
d) Beta
Multiple Choice Answers
1-a)
2-c)
3-a)
4-b)
5-d)Capsule and exotoxins
6)-c,
7-a)subtilis
8)-b,
9)-d,
10)-c
11)- a,
12)- c,
13)-b,
14)-d,
15)-c,
16)-a,
17-d) Produces neurotoxins
18)-b,
19)-c,
20)-a