Bacteria: Fungus-Like Gram Positive Bacilli

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What is a characteristic of the pathogenic species of Mycobacterium?

High infective dosage

Ability to form endospores

Slow growth rate due to slow entry of nutrients (correct)

Rapid growth rate

M. Leprae is an example of an obligate intracellular parasite that grows in which part of the body?

Central nervous system

Peripheral nervous system (correct)

Cardiovascular system

Respiratory system

What is the generation time of M. Leprae?

12 weeks

12 months

12 days (correct)

12 hours

What is the purpose of the acid-alcohol decolorization step in the acid-fast stain?

To differentiate acid-fast from non-acid-fast bacteria Signup and view all the answers

What is a characteristic of Mycoplasma?

They lack a cell wall and contain sterols Signup and view all the answers

What is the process by which Mycoplasma are losing their genetic materials?

Degenerative evolution Signup and view all the answers

What is a characteristic of Streptomyces?

Forming fungus-style reproductive spores Signup and view all the answers

Which bacterium causes actinomycosis, also known as lumpy jaw?

Actinomyces israelii Signup and view all the answers

Why are Actinomyces not classified as fungi?

They reproduce by cell fission Signup and view all the answers

What is unique about the cell wall of acid-fast bacteria?

It has a wax coat Signup and view all the answers

What is a common association with nocardiosis?

HIV infection Signup and view all the answers

What is a characteristic of Nocardia?

It forms filaments Signup and view all the answers

What is the mode of transmission of Chlamydophila psittaci?

Inhalation of dried particles from droppings Signup and view all the answers

What is the percentage of the U.S. population infected with Chlamydia pneumoniae?

50% Signup and view all the answers

What is the characteristic of Rickettsias?

Gram negative rod-shaped or coccobacilli Signup and view all the answers

What is the function of methanogens in sewage treatment processes?

To anaerobically break down organic matter Signup and view all the answers

What is a characteristic of Archea?

Cell walls lack peptidoglycan Signup and view all the answers

What type of environment do halophiles thrive in?

High salt concentrations Signup and view all the answers

What is the percentage of human pneumonia cases caused by M. pneumoniae?

20% Signup and view all the answers

What is unique about the cell walls of Chlamydia?

They lack peptidoglycan Signup and view all the answers

What is the shape of Chlamydia cells?

Coccoid Signup and view all the answers

What is the function of the elementary body in the Chlamydia life cycle?

It is the infective agent Signup and view all the answers

What is the most common STD in the USA caused by Chlamydia trachomatis?

Nongonococcal urethritis (NGU) Signup and view all the answers

What is the genus of bacteria that can enzymatically split urea in urine?

Ureaplasma Signup and view all the answers