Textbook Question
Which of the following bacteria might be responsible for the formation of petechiae in a host?
a. Neisseria meningitidis
b. Escherichia coli O157:H7
c. Klebsiella
d. Proteus mirabilis
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21. Principles of Disease
Characteristics of Infectious Disease
1:39 minutesProblem 4
Textbook Question
Match the following diseases with the causative pathogen(s).
___ Peptic ulcers
___ Gastroenteritis (various forms)
___ Blood poisoning
___ Cholera
A. Vibrio cholerae
B. Vibrio parahaemolyticus
C. Vibrio vulnificus
D. Campylobacter jejuni
E. Helicobacter pylori
Verified step by step guidance1
Identify the disease and recall the primary causative pathogen associated with it based on microbiological knowledge.
For Peptic ulcers, recognize that the bacterium known to colonize the stomach lining and cause ulcers is Helicobacter pylori.
For Gastroenteritis (various forms), consider common bacterial causes; Campylobacter jejuni is a well-known cause of bacterial gastroenteritis.
For Blood poisoning (septicemia), among the given options, Vibrio vulnificus is notable for causing severe wound infections and septicemia.
For Cholera, the causative agent is Vibrio cholerae, which produces cholera toxin leading to severe watery diarrhea.
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Video duration:
1mKey Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Pathogenic Bacteria and Disease Association
Understanding which bacteria cause specific diseases is fundamental in microbiology. Each pathogen has unique characteristics and infection mechanisms that lead to particular clinical conditions, such as Helicobacter pylori causing peptic ulcers or Vibrio cholerae causing cholera.
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Introduction to Pathogenic Toxins
Gastrointestinal Infections and Their Causative Agents
Gastroenteritis and related gastrointestinal diseases are often caused by various bacteria that disrupt normal gut function. Recognizing common pathogens like Campylobacter jejuni and Vibrio species helps in diagnosing and treating these infections effectively.
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Bacteremia and Blood Poisoning
Blood poisoning, or bacteremia, occurs when bacteria enter the bloodstream, potentially causing severe systemic infections. Certain Vibrio species, such as Vibrio vulnificus, are known to cause such invasive infections, highlighting the importance of identifying pathogens beyond localized infections.
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