COPY: Principles of Infectious Diseases Intro
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Questions and Answers

What is the definition of infection?

  • A disorder of structure or function in the host that adversely impacts the host
  • A disorder of structure or function in the host that is a result of physical injury
  • A disease caused by a pathogenic microorganism
  • The invasion and multiplication of pathogens in an individual or population (correct)

What is the term for diseases that can be spread directly or indirectly from one animal to another?

  • Infectious diseases
  • Pathogenic diseases
  • Invasive diseases
  • Communicable diseases (correct)

What is the term for the ability of a pathogen to cause disease?

  • Dispersal efficiency
  • Inoculation dose
  • Survival efficiency
  • Pathogenicity (correct)

What is the importance of Koch's postulates?

<p>To identify the pathogens causing diseases (D)</p> Signup and view all the answers

What is One Health?

<p>The interaction between humans, animals, and the environment (A)</p> Signup and view all the answers

What is the term for the study of the cause of disease?

<p>Etiology (A)</p> Signup and view all the answers

Who is credited with discovering the bacteria responsible for anthrax, tuberculosis, and cholera?

<p>Robert Koch (C)</p> Signup and view all the answers

What type of relationship exists between a microbe and its host when neither is harmed and one or both derive a benefit?

<p>Commensal (C)</p> Signup and view all the answers

What is the term for a microorganism that is capable of causing disease?

<p>Pathogen (C)</p> Signup and view all the answers

What is the term for a microorganism that must produce disease to transmit and thereby survive evolutionarily?

<p>Obligate pathogen (C)</p> Signup and view all the answers

Who is credited with demonstrating that a silkworm disease was contagious and caused by a microscopic fungus?

<p>Agostino Bassi (B)</p> Signup and view all the answers

Which type of pathogen requires significant impairment of the host's immunity to cause disease?

<p>Opportunistic pathogen (C)</p> Signup and view all the answers

What is the term for a microorganism that is transmitted to the host from an environmental source such as water or soil?

<p>Environmental pathogen (D)</p> Signup and view all the answers

What type of pathogen can infect and multiply in hosts, but is also capable of multiplying in the environment?

<p>Facultative pathogen (D)</p> Signup and view all the answers

What is the term for a microorganism that is a colonizer or pathogen on animals and that can be transmitted to humans?

<p>Zoonotic pathogen (D)</p> Signup and view all the answers

What is the term for a microorganism that is not a commensal, but can produce asymptomatic infections?

<p>Obligate pathogen (A)</p> Signup and view all the answers

How do commensal pathogens enter the host?

<p>By skipping the invasion step (C)</p> Signup and view all the answers

What is the essential trait for obligate pathogens?

<p>Exiting the host to infect new hosts (C)</p> Signup and view all the answers

Why may Koch's postulates not be fulfilled for some pathogens?

<p>The pathogen cannot be isolated or grown in culture (A)</p> Signup and view all the answers

What occurs during the incubation stage of an infectious disease?

<p>The pathogen multiplies without clinical signs (A)</p> Signup and view all the answers

Who first observed microorganisms?

<p>Antonie van Leeuwenhoek (C)</p> Signup and view all the answers

What is the term for a microorganism that is invisible to the naked eye?

<p>Microorganism (D)</p> Signup and view all the answers

What type of microorganism is capable of causing disease?

<p>Pathogen (B)</p> Signup and view all the answers

What is the term for a microorganism that is a normal inhabitant of the animal body?

<p>Commensal (B)</p> Signup and view all the answers

Who developed the pasteurization process and developed vaccines against rabies and anthrax?

<p>Louis Pasteur (A)</p> Signup and view all the answers

What is the size order of microorganisms, from smallest to largest?

<p>Prions, viruses, bacteria, fungi, protozoa, multicellular parasites (A)</p> Signup and view all the answers

What is the primary characteristic of an opportunistic pathogen?

<p>It requires significant impairment of the host's immunity to cause disease. (B)</p> Signup and view all the answers

Which type of pathogen can cause disease in humans through direct contact with an animal or its products?

<p>Zoonotic pathogen (D)</p> Signup and view all the answers

What is the term for a microorganism that is commonly found within the indigenous microbiota and can cause disease in normal hosts with some regularity?

<p>Commensal pathogen (B)</p> Signup and view all the answers

What type of pathogen can cause disease through vectors such as ticks?

<p>Zoonotic pathogen (D)</p> Signup and view all the answers

What is the primary characteristic of an obligate pathogen?

<p>It is not a commensal, but can produce asymptomatic infections. (A)</p> Signup and view all the answers

What is necessary for a pathogen to establish a unique habitat within the host?

<p>Both A and D (C)</p> Signup and view all the answers

Which of the following is NOT a limitation of Koch’s postulates?

<p>Disease caused by viruses (C)</p> Signup and view all the answers

What occurs during the prodromal stage of an infectious disease?

<p>General and unspecific signs appear (A)</p> Signup and view all the answers

What is the essential trait for obligate pathogens?

<p>Ability to transmit to new hosts (A)</p> Signup and view all the answers

What is the primary difference between infection and disease?

<p>Infection is the invasion and multiplication of pathogens, while disease is a disorder of structure or function (A)</p> Signup and view all the answers

Flashcards

What is an infection?

The invasion and multiplication of pathogens in an individual or population.

What are communicable diseases?

Diseases that can be spread directly or indirectly from one animal to another.

What is pathogenicity?

The ability of a pathogen to cause disease.

What are Koch's postulates?

A set of criteria used to establish a causal relationship between a microbe and a disease.

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What is One Health?

The interconnectedness of human, animal, and environmental health.

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What is etiology?

The study of the cause of disease.

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Who discovered the bacteria responsible for anthrax, tuberculosis, and cholera?

Robert Koch discovered the bacteria responsible for anthrax, tuberculosis, and cholera.

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What is a commensal relationship?

A relationship where neither organism is harmed, and one or both benefit.

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What is a pathogen?

A microorganism capable of causing disease.

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What is an obligate pathogen?

A microorganism that must produce disease to transmit and survive evolutionarily.

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Who demonstrated that a silkworm disease was caused by a microscopic fungus?

Agostino Bassi demonstrated that a silkworm disease was contagious and caused by a microscopic fungus.

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What is an opportunistic pathogen?

A pathogen that requires significant impairment of the host's immunity to cause disease.

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What is an environmental pathogen?

A microorganism transmitted to the host from an environmental source, like water or soil.

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What is a facultative pathogen?

A pathogen that can infect and multiply in hosts but also in the environment.

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What is a zoonotic pathogen?

A microorganism that colonizes or pathogens on animals and can transmit to humans.

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What is an obligate pathogen?

A microorganism that is not a commensal but can produce asymptomatic infections.

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How do commensal pathogens enter the host?

Commensal pathogens enter the host by skipping the invasion step.

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What is the essential trait for obligate pathogens?

Exiting the host to infect new hosts.

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Why may Koch's postulates not be fulfilled for some pathogens?

Koch's postulates may not be fulfilled if the pathogen cannot be isolated or grown in culture.

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What occurs during the incubation stage of an infectious disease?

The pathogen multiplies without clinical signs.

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Who first observed microorganisms?

Antonie van Leeuwenhoek was the first to observe microorganisms.

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What is a microorganism?

A microorganism that is invisible to the naked eye.

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What is a pathogen?

A microorganism capable of causing disease.

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What is a commensal?

A microorganism that is a normal inhabitant of the animal body.

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Who developed the pasteurization process and vaccines against rabies and anthrax?

Louis Pasteur developed the pasteurization process and vaccines against rabies and anthrax.

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What is the size order of microorganisms, from smallest to largest?

Prions, viruses, bacteria, fungi, protozoa, multicellular parasites.

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What is the primary characteristic of an opportunistic pathogen?

It requires significant impairment of the host's immunity to cause disease.

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Which type of pathogen can cause disease in humans through direct contact with an animal or its products?

A zoonotic pathogen can cause disease in humans through direct contact with an animal or its products.

Signup and view all the flashcards

What is the term for a microorganism that is commonly found within the indigenous microbiota and can cause disease in normal hosts with some regularity?

A commensal pathogen is commonly found within the indigenous microbiota and can cause disease in normal hosts with some regularity.

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What type of pathogen can cause disease through vectors such as ticks?

A zoonotic pathogen can cause disease through vectors such as ticks.

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What is the primary characteristic of an obligate pathogen?

It is not a commensal, but can produce asymptomatic infections.

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What is necessary for a pathogen to establish a unique habitat within the host?

Both A and D

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Which of the following is NOT a limitation of Koch's postulates?

Disease caused by viruses

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What occurs during the prodromal stage of an infectious disease?

General and unspecific signs appear.

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What is the essential trait for obligate pathogens?

Ability to transmit to new hosts

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What is the primary difference between infection and disease?

Infection is the invasion and multiplication of pathogens, while disease is a disorder of structure or function.

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