Textbook Question
Under what conditions can the saprophytes Aspergillus and Rhizopus cause infections?
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Ch. 24 - Microbial Diseases of the Respiratory System
Tortora14th EditionMicrobiology: An IntroductionISBN: 9780138200398
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Table of contents
- Ch. 1 - The Microbial World and You18
- Ch. 2 - Chemical Principles20
- Ch. 3 - Observing Microorganisms Through a Microscope18
- Ch. 4 - Functional Anatomy of Prokaryotic and Eukaryotic Cells21
- Ch. 5 - Microbial Metabolism20
- Ch. 6 - Microbial Growth20
- Ch. 7 - The Control of Microbial Growth20
- Ch. 8 - Microbial Genetics19
- Ch. 9 - Biotechnology & DNA Technology20
- Ch. 10 - Classification of Microorganisms15
- Ch. 11 - The Prokaryotes: Domains Bacteria and Archaea14
- Ch. 12 - The Eukaryotes: Fungi, Algae, Protozoa, and Helminths17
- Ch. 13 - Viruses, Viroids, and Prions20
- Ch. 14 - Principles of Disease and Epidemiology21
- Ch. 15 - Microbial Mechanisms of Pathogenicity19
- Ch. 16 - Innate Immunity: Nonspecific Defenses of the Host20
- Ch. 17 - Adaptive Immunity: Specific Defenses of the Host20
- Ch. 18 - Practical Applications of Immunology20
- Ch. 19 - Disorders Associated with the Immune System19
- Ch. 20 - Antimicrobial Drugs19
- Ch. 21 - Microbial Diseases of the Skin and Eyes21
- Ch. 22 - Microbial Diseases of the Nervous System19
- Ch. 23 - Microbial Diseases of the Cardiovascular and Lymphatic Systems20
- Ch. 24 - Microbial Diseases of the Respiratory System20
- Ch. 25 - Microbial Diseases of the Digestive System20
- Ch. 26 - Microbial Diseases of the Urinary and Reproductive Systems19
- Ch. 27 - Environmental Microbiology20
- Ch. 28 - Applied and Industrial Microbiology19
Tortora14th EditionMicrobiology: An IntroductionISBN: 9780138200398Not the one you use?Change textbook
Chapter 24, Problem 4
Match the following choices to the culture descriptions in questions 3 through 6:
a. Chlamydia
b. Coccidioides
c. Histoplasma
d. Mycobacterium
e. Mycoplasma
This pneumonia etiology requires cell culture.
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Understand the question: It asks which organism among the given options requires cell culture for diagnosis, specifically related to pneumonia.
Recall the characteristics of each organism: For example, Chlamydia and Mycoplasma are known to be difficult to culture using standard methods, with Chlamydia often requiring cell culture due to its obligate intracellular nature.
Identify which organism is an obligate intracellular pathogen: Chlamydia is an obligate intracellular bacterium, meaning it cannot grow on standard artificial media and requires living cells for culture.
Compare with other options: Mycoplasma lacks a cell wall but can be cultured on specialized media; Mycobacterium can be cultured on special media but does not require cell culture; Coccidioides and Histoplasma are fungi and can be cultured on fungal media.
Conclude that the organism requiring cell culture for pneumonia diagnosis is the obligate intracellular bacterium, Chlamydia.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Cell Culture in Microbiology
Cell culture involves growing cells under controlled conditions, often used to cultivate organisms that cannot grow on standard media. Some pathogens, like Chlamydia, are obligate intracellular bacteria requiring living host cells for replication, making cell culture essential for their isolation and study.
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Characteristics of Chlamydia
Chlamydia is an obligate intracellular bacterium that cannot be grown on artificial media. It requires living host cells for growth, typically cultured in cell lines, which is why cell culture is necessary to diagnose infections caused by this pathogen.
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Etiology of Pneumonia
Pneumonia can be caused by various microorganisms, including bacteria, fungi, and viruses. Understanding the specific pathogen's growth requirements, such as whether it needs cell culture or special media, is crucial for accurate diagnosis and treatment.
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Related Practice
Textbook Question
Match the following choices to the culture descriptions in questions 3 through 6:
a. Chlamydia
b. Coccidioides
c. Histoplasma
d. Mycobacterium
e. Mycoplasma
Microscopic examination of a lung biopsy shows ovoid cells in alveolar macrophages. You suspect these are the cause of the patient’s signs and symptoms, but your culture grows a filamentous organism.
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Textbook Question
Compare and contrast mycoplasmal pneumonia and viral pneumonia.
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Textbook Question
List the causative agent, signs and symptoms, and treatment for four viral diseases of the respiratory system. Separate the diseases according to whether they infect the upper or lower respiratory system.
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Textbook Question
Your culture from a pneumonia patient appears not to have grown. You do see colonies, however, when the plate is viewed at 100x.
a. Chlamydia
b. Coccidioides
c. Histoplasma
d. Mycobacterium
e. Mycoplasma
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Textbook Question
Complete the following table.
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