Textbook Question
Which of the following conditions is a systemic disease caused by Staphylococcus?
a. Impetigo
b. Folliculitis
c. Carbuncle
d. Toxic shock syndrome
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21. Principles of Disease
Bacterial Pathogenesis
2:05 minutesProblem 1
Textbook Question
For each of the following diseases or conditions, indicate the genus (or genera) of bacterium that causes it.
___ Scalded skin syndrome
___ Osteomyelitis
___ Pharyngitis
___ Scarlet fever
___ Pyoderma
___ Rheumatic fever
___ Glomerulonephritis
___ Sinusitis
___ Otitis media
___ Anthrax
___ Myonecrosis
___ Diphtheria
___ Leprosy
___ Dental caries
___ Acne
A. Staphylococcus
B. Streptococcus
C. Mycobacterium
D. Listeria
E. Propionibacterium
F. Corynebacterium
G. Bacillus
H. Clostridium
I. Actinomyces
Verified step by step guidance1
Step 1: Understand that each disease or condition is caused by a specific genus of bacteria. Your task is to match each disease with the correct bacterial genus from the provided list.
Step 2: Recall or research the common bacterial causes for each condition. For example, Scalded skin syndrome is typically caused by bacteria from the genus Staphylococcus, while Diphtheria is caused by Corynebacterium.
Step 3: Use the process of elimination and your knowledge of microbiology to assign the correct genus to each disease. For instance, diseases like Scarlet fever and Rheumatic fever are associated with Streptococcus, while Anthrax is caused by Bacillus.
Step 4: Write down the genus letter (A through I) next to each disease based on your matching. This helps organize your answers clearly and ensures you have covered all diseases.
Step 5: Review your matches to confirm they align with known microbiological facts about each disease's causative agent, ensuring accuracy before finalizing your answers.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Bacterial Genus and Disease Association
Many bacterial diseases are caused by specific genera, each with characteristic pathogenic mechanisms. Understanding which genus is responsible for a disease helps in diagnosis and treatment. For example, Staphylococcus often causes skin infections, while Streptococcus is linked to throat infections and rheumatic fever.
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Pathogenesis and Clinical Manifestations
Different bacteria cause distinct clinical syndromes based on their virulence factors and tissue tropism. Recognizing the symptoms and affected tissues (e.g., skin, bone, respiratory tract) aids in linking diseases to their bacterial causes. For instance, Mycobacterium causes chronic infections like leprosy, while Clostridium produces toxins leading to myonecrosis.
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Microbial Taxonomy and Identification
Bacterial genera are classified based on morphology, staining, and biochemical properties. Knowing these classifications helps differentiate similar diseases caused by different bacteria. For example, Corynebacterium diphtheriae causes diphtheria, distinguished from other genera by its club-shaped cells and toxin production.
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