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Ch. 11 - Characterizing and Classifying Prokaryotes
Bauman - Microbiology with Diseases by Taxonomy 6th Edition
Bauman6th EditionMicrobiology with Diseases by TaxonomyISBN: 9780134832302Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoBauman 6th EditionCh. 11 - Characterizing and Classifying ProkaryotesProblema 7
Capitolo 11, Problema 7

Which genus is the most common anaerobic human pathogen?
a. Bacteroides
b. Spirochetes
c. Chlamydia
d. Methanopyrus

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1
Step 1: Understand the question is asking for the genus that is the most common anaerobic human pathogen. Anaerobic pathogens are bacteria that thrive in environments without oxygen and can cause infections in humans.
Step 2: Review each option's characteristics: Bacteroides are known anaerobic bacteria commonly found in the human gut and are frequent causes of anaerobic infections; Spirochetes are typically aerobic or microaerophilic and include genera like Treponema; Chlamydia are obligate intracellular pathogens but not anaerobic; Methanopyrus is an archaeal genus, not typically associated with human pathogens.
Step 3: Recognize that Bacteroides is the genus most commonly associated with anaerobic infections in humans, often involved in abscesses and intra-abdominal infections.
Step 4: Eliminate other options based on their oxygen requirements and pathogenicity in humans: Spirochetes and Chlamydia are not primarily anaerobic, and Methanopyrus is not a human pathogen.
Step 5: Conclude that the correct answer is the genus Bacteroides, as it is the most common anaerobic human pathogen.

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Anaerobic Bacteria

Anaerobic bacteria are microorganisms that do not require oxygen for growth and may even die in its presence. They are commonly found in environments like the human gut and deep tissues. Understanding anaerobes is crucial for identifying pathogens that thrive in oxygen-poor conditions.
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Anaerobic Respiration

Bacteroides Genus

Bacteroides is a genus of Gram-negative, obligate anaerobic bacteria that are predominant in the human intestinal flora. They are the most common anaerobic pathogens causing infections such as abscesses and peritonitis, making them significant in clinical microbiology.
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Human Pathogens and Their Classification

Human pathogens are microorganisms that cause disease. They can be classified by oxygen requirements, morphology, and genetic traits. Recognizing the differences among genera like Spirochetes, Chlamydia, and Methanopyrus helps in diagnosing infections and selecting appropriate treatments.
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The Human Microbiome
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