Textbook Question
Use the following choices to answer the question given below.
a. Pseudomonas
b. Staphylococcus aureus
c. Scabies
d. Sporothrix
e. Virus
Microscopic examination of scrapings from the patient’s rash shows gram-negative rods.
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Ch. 21 - Microbial Diseases of the Skin and Eyes
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 21, Problem 9
Use the following choices to answer questions 8–10:
a. Apicomplexa
b. Ciliates
c. Dinoflagellates
d. Microsporidia
These are nonmotile parasites with special organelles for penetrating host tissue.
Verified step by step guidance1
Read the question carefully to identify the key characteristics described: nonmotile parasites with special organelles for penetrating host tissue.
Recall the defining features of each group listed: Apicomplexa, ciliates, dinoflagellates, and Microsporidia.
Understand that Apicomplexa are known for having an apical complex, a specialized structure used to penetrate host cells, and are typically nonmotile in their infectious stages.
Recognize that ciliates and dinoflagellates are generally motile due to cilia or flagella, and Microsporidia are obligate intracellular parasites but have different characteristics.
Match the description of nonmotile parasites with special organelles for host penetration to the group Apicomplexa.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Apicomplexa
Apicomplexa are a group of nonmotile, obligate intracellular parasites characterized by a unique set of organelles called the apical complex, which helps them penetrate host cells. They include important pathogens like Plasmodium and Toxoplasma, causing diseases such as malaria and toxoplasmosis.
Motility and Parasite Classification
Motility refers to an organism's ability to move independently, often using structures like cilia or flagella. In parasitology, distinguishing motile from nonmotile parasites helps classify them and understand their infection mechanisms, as nonmotile parasites rely on specialized structures rather than movement to invade hosts.
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Specialized Organelles for Host Penetration
Certain parasites possess specialized organelles, such as the apical complex in Apicomplexa, that enable them to attach to and penetrate host tissues. These structures are critical for initiating infection and differentiating these parasites from others that use motility or other mechanisms to infect hosts.
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Related Practice
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This anaerobic, gram-positive rod is found on the skin. Infections are often treated with retinoids or benzoyl peroxide.
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Textbook Question
What is in the MMR vaccine?
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Textbook Question
Which of the following pairs is mismatched?
a. Leading infectious cause of blindness—Chlamydia
b. Chickenpox—shingles
c. HSV-1—encephalitis
d. Buruli ulcer—stomach acid
e. None of the above
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Textbook Question
A patient exhibits inflammatory skin lesions that itch intensely. Microscopic examination of skin scrapings reveals an eight-legged arthropod. What is your diagnosis? How is the disease treated? What would you conclude if you saw a six-legged arthropod?
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Textbook Question
Use the following choices to answer the question given below.
a. Pseudomonas
b. Staphylococcus aureus
c. Scabies
d. Sporothrix
e. Virus
Microscopic examination of the patient’s ulcer reveals 10μm ovoid cells.
4
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