MISCELLANEOUS BACTERIA Dr.T.V.Rao MD Listeria Monocytogenes Quiz

Which of the following is NOT a specimen used for the laboratory diagnosis of Legionnaires' disease?

Bronchial aspirate
Sputum
Lung biopsy
Blood (correct)

What is the typical duration of treatment for Legionnaires' disease in immunosuppressed patients?

21 days (correct)
28 days
14 days
7-10 days

Which of the following antibiotics is NOT used to treat Legionnaires' disease?

Macrolides
Ciprofloxacin
Penicillin (correct)
Tetracyclines

What is the typical incubation period for Rat Bite Fever caused by Spirillum minus?

1-4 weeks (D) Signup and view all the answers

Which of the following is NOT a characteristic of Acinetobacter baumannii?

Oxidase-positive (B) Signup and view all the answers

What is the primary treatment for Rat Bite Fever caused by Spirillum minus?

Penicillin (C) Signup and view all the answers

What is the primary causative agent of legionellosis or Legionnaires' disease?

Legionella pneumophila (C) Signup and view all the answers

What is the typical morphology of Legionella pneumophila?

Thin, non-capsulated Gram-negative bacilli (B) Signup and view all the answers

How do Legionella pneumophila cells appear under the microscope?

As cut glass-like coccobacillary forms (B) Signup and view all the answers

Which of the following is NOT a predisposing factor for Legionnaires' disease?

Pregnancy (B) Signup and view all the answers

What is the primary mode of transmission for Legionella pneumophila?

Inhalation of aerosols from contaminated sources (C) Signup and view all the answers

Where do Legionella bacteria naturally reside?

In natural fresh water reservoirs (C) Signup and view all the answers

What is a key characteristic of Helicobacter pylori?

Requires complex media to grow (A) Signup and view all the answers

How does Helicobacter pylori spread primarily?

By oral-oral contact (D) Signup and view all the answers

What type of environment is favorable for the growth of Helicobacter pylori?

High carbon dioxide levels (B) Signup and view all the answers

Which statement is true about the pathogenesis of Helicobacter pylori?

It invades the gastric mucosa (B) Signup and view all the answers

What is a significant biochemical characteristic of Helicobacter pylori?

H2S producer (A) Signup and view all the answers

'Microaerophilic' refers to an environment with:

Low oxygen levels (C) Signup and view all the answers

Which of the following best describes the motility of Listeria monocytogenes?

It exhibits tumbling motility at 25°C but is non-motile at 37°C. (A) Signup and view all the answers

Which of the following groups is most susceptible to listeriosis?

Elderly individuals, pregnant women, newborns, and those with weakened immune systems (C) Signup and view all the answers

What is the causative agent of listeriosis?

A bacterium, Listeria monocytogenes (C) Signup and view all the answers

Which of the following statements about Listeria monocytogenes is correct?

It is a small, coccal, Gram-positive bacterium that occurs in chains. (C) Signup and view all the answers

How can Listeria monocytogenes be cultured?

On Muller Hinton agar with sheep blood enrichment (B) Signup and view all the answers

Which of the following best describes the respiratory requirements of Listeria monocytogenes?

It is both aerobic and microaerophilic. (B) Signup and view all the answers

Which of the following is true about Erysipelothrix rhusiopathiae?

It produces black colonies on tellurite medium (A) Signup and view all the answers

What is the common clinical manifestation of infection with Erysipelothrix rhusiopathiae?

Painful, erythematous lesions on hands and fingers (B) Signup and view all the answers

Which of the following is an appropriate treatment for Erysipelothrix rhusiopathiae infection?

Ampicillin (A) Signup and view all the answers

Which of the following is true about Gardnerella vaginalis?

It is an emerging infection (C) Signup and view all the answers

What is the characteristic feature of 'clue cells' associated with Gardnerella vaginalis infection?

They are epithelial cells with surface studded with small bacteria (C) Signup and view all the answers

Which of the following is an appropriate treatment for Gardnerella vaginalis infection?

Metronidazole (B) Signup and view all the answers