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Bacillus thuringiensis: Microbial Insect Pathogen Quiz

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Bacillus thuringiensis: Microbial Insect Pathogen Quiz

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Questions and Answers

Which characteristic differentiates Clostridium from Bacillus cereus?

Presence of crystalline toxins

Formation of ellipsoidal spores

Motility in the presence of oxygen

Formation of cuboid or diamond-shaped crystals (correct)

How can the insecticidal toxin crystals in Bacillus thuringiensis be demonstrated?

By staining with safranin

By staining with crystal violet

Through electron microscopy

With phase contrast microscopy (correct)

Which of the following Bacillus species is commonly used for genetic modification of plants to make them pest-resistant?

Bacillus cereus

Bacillus subtilis

Bacillus thuringiensis (correct)

Bacillus anthracis

What is a common lab contaminant that may be mistaken for Bacillus anthracis?

Clostridium perfringens Signup and view all the answers

In what type of environment do Clostridium species typically thrive?

Strictly anaerobic conditions Signup and view all the answers

What is the manifestation of Bacillus cereus food poisoning if the food is eaten without adequate reheating?

Foamy and foul-smelling Signup and view all the answers

How does hyperbaric oxygen therapy (HBO2) impact bacterial growth?

Blocks further bacterial growth Signup and view all the answers

What is another name commonly used for Bacillus cereus food poisoning?

Pig Bel Signup and view all the answers

Which of the following is a characteristic feature of Clostridium tetani, commonly known as Drumstick bacillus?

Spore-forming and round spores Signup and view all the answers

What type of inflammation does necrotizing enterocolitis (NEC) cause?

Inflammation of both small intestines and colon Signup and view all the answers

What is the former name of C.perfringens?

Clostridium welchii Signup and view all the answers

Which Clostridium species is characterized by spastic paralysis?

Clostridium tetani Signup and view all the answers

What is the common name for C.perfringens?

Welch’s bacillus Signup and view all the answers

Which Clostridium species causes botulism characterized by flaccid paralysis?

C. botulinum Signup and view all the answers

What type of anaerobes are Clostridioides difficile and C.perfringens classified as?

Obligate anaerobes Signup and view all the answers

Which Clostridium species is known to cause gas gangrene?

C. novyi Signup and view all the answers