Textbook Question
_____ are tumorlike fungal infections.
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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 4
Indicate whether each statement is true or false. If the statement is false, change the underlined word or phrase to make the statement true.
_____ Chromoblastomycosis and phaeohyphomycosis are both caused by dark-pigmented ascomycetes.
Verified step by step guidance1
Step 1: Understand the key terms in the statement. Chromoblastomycosis and phaeohyphomycosis are fungal infections caused by dematiaceous (dark-pigmented) fungi.
Step 2: Identify the classification of the fungi causing these diseases. Both chromoblastomycosis and phaeohyphomycosis are caused by dark-pigmented fungi, which are typically classified as dematiaceous fungi.
Step 3: Determine the fungal group involved. These fungi are mostly from the phylum Ascomycota, so they are ascomycetes, but some may belong to other groups.
Step 4: Evaluate the statement: 'Chromoblastomycosis and phaeohyphomycosis are both caused by dark-pigmented ascomycetes.' Since the causative fungi are dark-pigmented and mostly ascomycetes, the statement is generally true.
Step 5: If the statement were false, you would need to replace 'ascomycetes' with the correct fungal classification, but in this case, no change is necessary.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Chromoblastomycosis and Phaeohyphomycosis
These are two types of fungal infections caused by dematiaceous (dark-pigmented) fungi. Chromoblastomycosis is characterized by chronic skin lesions with sclerotic bodies, while phaeohyphomycosis involves a variety of tissue infections with pigmented hyphae but no sclerotic bodies.
Dematiaceous Fungi and Pigmentation
Dematiaceous fungi are dark-pigmented due to melanin in their cell walls, which contributes to their pathogenicity. These fungi belong to various taxonomic groups, including ascomycetes and basidiomycetes, and are responsible for several cutaneous and subcutaneous infections.
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Fungal Taxonomy: Ascomycetes vs. Other Groups
Ascomycetes are a large group of fungi characterized by producing spores in asci. While many dematiaceous fungi causing these infections are ascomycetes, some may belong to other groups. Correct identification of fungal taxonomy is essential for accurate diagnosis and treatment.
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Related Practice
Textbook Question
Because amphotericin B is toxic to humans, most clinicians prescribe it only for ______.
a. dermatophyte infections
b. Malassezia infections
c. systemic infections
d. mushroom poisoning
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Textbook Question
Ringworm is caused by a____
a. helminth
b. dermatophyte
c. dimorphic fungus
d. commensal fungus
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Textbook Question
AIDS patients usually die of bacterial, fungal, or microsporidial infections. Why do so many fungal infections appear in these individuals, and why are mycoses severe while fungi, for the most part, are benign residents of the environment?
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Textbook Question
Sporotrichosis is caused by the traumatic introduction of ______ into the skin (give genus and species).
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Textbook Question
Many antifungal agents target the compound _____ in fungal cytoplasmic membranes.
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