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Rickettsia Rickettsii Quiz: Intracellular Pathogen and Transmission via Ticks

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Rickettsia Rickettsii Quiz: Intracellular Pathogen and Transmission via Ticks

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Questions and Answers

Which of the following statements accurately describes the Rickettsia rickettsii organism?

It is a virus that infects and replicates within the host's nuclei.

It is a gram-positive bacterium that stains well with Gram stain.

It can survive and replicate independently outside of host cells.

It is an obligate intracellular pathogen that requires ATP and cofactors from the host cell. (correct)

Which diagnostic method is commonly used to identify Rickettsia rickettsii infection?

Gram stain

Polymerase chain reaction (PCR)

Acid-fast stain

Giemsa stain and immunofluorescence assay (IFA) (correct)

What is the primary mode of transmission for Rickettsia rickettsii?

Ingestion of contaminated food or water

Direct contact with infected individuals

Bites from infected ticks (correct)

Inhalation of aerosolized particles

Which of the following is the recommended treatment for Rocky Mountain Spotted Fever caused by Rickettsia rickettsii?

Doxycycline Signup and view all the answers

Which of the following is NOT a common symptom of Rocky Mountain Spotted Fever?

Jaundice and liver failure Signup and view all the answers

Which of the following is the primary reservoir for Rickettsia rickettsii?

Both small wild rodents and large domesticated animals Signup and view all the answers

What is the key feature that distinguishes Rickettsia rickettsii from other bacteria?

They are obligate intracellular parasites, requiring ATP from their host cells Signup and view all the answers

Why is the CoA (coenzyme A) and NAD+ (nicotinamide adenine dinucleotide) provided by the eukaryotic host cell important for Rickettsia rickettsii?

CoA and NAD+ are required as cofactors for essential metabolic processes within the Rickettsia rickettsii bacteria Signup and view all the answers

How do the symptoms of Rocky Mountain Spotted Fever typically progress in infected individuals?

The rash starts on the extremities and then spreads more centrally, along with headache, fever, and muscle pain Signup and view all the answers

Which of the following is the primary mode of transmission for Rickettsia rickettsii, the causative agent of Rocky Mountain Spotted Fever?

Tick bites, particularly from the Dermacentor tick Signup and view all the answers

What is the recommended treatment for Rocky Mountain Spotted Fever caused by Rickettsia rickettsii infection?

Antibiotic therapy with doxycycline Signup and view all the answers

Which of the following is a common symptom associated with Rocky Mountain Spotted Fever?

All of the above Signup and view all the answers