Special Bacteriology Quiz: Food Poisoning and B. anthracis

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Questions and Answers

Which organism is most likely responsible for the food poisoning due to ingestion of fried rice?

Staphylococcus aureus

Bacillus cereus (correct)

Clostridia botulinum

Bacillus anthracis

What is the correct statement concerning Bacillus anthracis organism?

It can cause latent infection and can be re-activated after several years

It can produce potent neurotoxins that result in nerve system damage

It has a strong endotoxin that can cause shock like state after antibiotic administration

It may be spread in a body via lymphatic or blood stream and cause septicemia (correct)

Which diagnosis is associated with 'Medusa head' colonies on nutrient agar?

Plague

Anthrax (correct)

Leptospirosis

Syphilis

What type of vaccine is available against anthrax?

Highly virulent heat-killed whole organism Signup and view all the answers

Which properties are important virulence determinants of B. anthracis?

Exotoxin and endotoxin Signup and view all the answers

What is the most likely cause of gas gangrene?

Bacillus anthracis Signup and view all the answers

Which of the following organisms is associated with the 'string of pearl' colonies on penicillin-containing medium?

Staphylococcus Signup and view all the answers

Which clinical form of anthrax most likely has a poor prognosis?

Pulmonary anthrax Signup and view all the answers

What is the major reservoir for B. anthracis infection?

Spores in soil Signup and view all the answers

Which zoonotic disease has NO arthropod vector?

Anthrax Signup and view all the answers

Which organism produces a frequently misdiagnosed food poisoning associated with fried rice?

Bacillus cereus Signup and view all the answers

Which bacteria paired with a mode of transmission is correct?

Leptospira interrogans - infected urine Signup and view all the answers

What is the cause of the relapses in relapsing fever?

Changing in pathogen’s antigens Signup and view all the answers

Each of the following statements about Weil’s disease is correct, except:

It can be transmitted from animals to humans by tick bite Signup and view all the answers

Which lab test can be used to distinguish epidemic and endemic relapsing fever?

Serological test for IgM antibody Signup and view all the answers

Which of the following diseases is not a zoonotic disease?

Epidemic relapsing fever Signup and view all the answers

What is the major reservoir for B. anthracis infection?

Spores in soil Signup and view all the answers

What organism produces a frequently misdiagnosed food poisoning associated with fried rice?

Bacillus cereus Signup and view all the answers

Study Notes

Food Poisoning and Bacteria

Bacillus cereus is the organism most likely responsible for food poisoning due to ingestion of fried rice.
It is frequently misdiagnosed.

Bacillus Anthracis

Bacillus anthracis is associated with 'Medusa head' colonies on nutrient agar.
The correct statement concerning Bacillus anthracis is that it is a zoonotic disease with no arthropod vector.
The major reservoir for B. anthracis infection is animals, particularly herbivores.
Important virulence determinants of B. anthracis include capsule and toxins.
A cell-free vaccine is available against anthrax.
Cutaneous anthrax has a good prognosis, while inhalation anthrax has a poor prognosis.

Gas Gangrene and Relapsing Fever

Gas gangrene is most likely caused by Clostridium perfringens.
Borrelia recurrentis is the cause of relapses in relapsing fever.
The correct pairing of organism and mode of transmission is Borrelia recurrentis and lice.
Epidemic and endemic relapsing fever can be distinguished by the lab test of PCR (polymerase chain reaction).

Zoonotic Diseases and Weil's Disease

Weil's disease is a zoonotic disease, and each of the following statements about it is correct, except one: leptospirosis is not transmitted by human-to-human contact.
Brucellosis is a zoonotic disease, but it is not the correct answer to any of the above questions.
Streptobacillus moniliformis is associated with the 'string of pearl' colonies on penicillin-containing medium.

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Description

Test your knowledge of special bacteriology with this quiz focused on food poisoning and the characteristics of Bacillus anthracis. Answer questions about organisms causing food poisoning and statements about the B. anthracis organism.