Textbook Question
Dimorphic fungi exist as _____ forms in the environment and as _____ forms in their hosts.
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Ch. 22 - Pathogenic Fungi
Bauman6th EditionMicrobiology with Diseases by TaxonomyISBN: 9780134832302
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Table of contents
- Ch. 1 - A Brief History of Microbiology31
- Ch. 2 - The Chemistry of Microbiology28
- Ch. 3 - Cell Structure and Function39
- Ch. 4 - Microscopy, Staining, and Classification25
- Ch. 5 - Microbial Metabolism51
- Ch. 6 - Microbial Nutrition and Growth37
- Ch. 7 - Microbial Genetics51
- Ch. 8 - Recombinant DNA Technology21
- Ch. 9 - Controlling Microbial Growth in the Environment36
- Ch. 10 - Controlling Microbial Growth in the Body: Antimicrobial Drugs21
- Ch. 11 - Characterizing and Classifying Prokaryotes29
- Ch. 12 - Characterizing and Classifying Eukaryotes34
- Ch. 13 - Characterizing and Classifying Viruses, Viroids, and Prions23
- Ch. 14 - Infection, Infectious Diseases, and Epidemiology35
- Ch. 15 - Innate Immunity34
- Ch. 16 - Adaptive Immunity21
- Ch. 17 - Immunization and Immune Testing29
- Ch. 18 - Immune Disorders22
- Ch. 19 - Pathogenic Gram-Positive Bacteria25
- Ch. 20 - Pathogenic Gram-Negative Cocci and Bacilli28
- Ch. 21 - Rickettsias, Chlamydias, Spirochetes, and Vibrios25
- Ch. 22 - Pathogenic Fungi47
- Ch. 23 - Parasitic Protozoa, Helminths, and Arthropod Vectors44
- Ch. 24 - Pathogenic DNA Viruses23
- Ch. 25 - Pathogenic RNA Viruses30
- Ch. 26 - Applied and Industrial Microbiology29
- Ch. 27 - Microbial Ecology and Microbiomes22
Bauman6th EditionMicrobiology with Diseases by TaxonomyISBN: 9780134832302Not the one you use?Change textbook
Chapter 22, Problem 1
A fungus that can infect both healthy and immunocompromised patients is called
a(n) _______.
a. true pathogen
b. opportunistic pathogen
c. commensal organism
d. symbiotic organism
Verified step by step guidance1
Understand the definitions of the terms given in the options: a 'true pathogen' is an organism capable of causing disease in healthy individuals as well as those with weakened immune systems.
An 'opportunistic pathogen' typically causes disease only in immunocompromised or weakened hosts, not in healthy individuals.
A 'commensal organism' lives on or within a host without causing harm, often benefiting from the host without affecting it.
A 'symbiotic organism' refers to an organism involved in a close and often long-term interaction with another organism, which can be mutualistic, commensal, or parasitic.
Since the question asks for a fungus that can infect both healthy and immunocompromised patients, identify which term matches this capability based on the definitions.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
True Pathogen
A true pathogen is a microorganism capable of causing disease in healthy individuals with normal immune defenses. These pathogens have specific virulence factors that allow them to invade and damage host tissues regardless of the host's immune status.
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Introduction to Pathogenic Toxins
Opportunistic Pathogen
An opportunistic pathogen causes disease primarily in immunocompromised or weakened hosts, taking advantage of reduced immune defenses. These organisms are usually harmless in healthy individuals but can cause infections when the immune system is impaired.
Recommended video:
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03:40Introduction to Pathogenic Toxins
Commensal and Symbiotic Organisms
Commensal organisms live on or within a host without causing harm, often benefiting from the host environment. Symbiotic organisms engage in mutually beneficial relationships with the host. Neither typically causes disease under normal conditions.
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05:59Symbiotic Relationships
Related Practice
Textbook Question
The true fungal pathogens are _____ , _____ , _____ , and_____ (give genus and specific epithet).
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Textbook Question
Indicate whether each statement is true or false. If the statement is false, change the underlined word or phrase to make the statement true.
_____ On the whole, fungal infections are relatively easy to treat.
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Textbook Question
Color each map below to show the general area where each disease is endemic.
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Textbook Question
Indicate whether each statement is true or false. If the statement is false, change the underlined word or phrase to make the statement true.
_____ Fungi are generally not transmitted from person to person.
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Textbook Question
Amphotericin B is considered the “gold standard” of antifungal agents. Technically, its mode of action works against most fungal infections. Why, then, isn’t it prescribed for most fungal infections?
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