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Disease Transmission quiz

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  • What is the next step in the chain of infection after a pathogen leaves the reservoir?
    The next step is disease transmission, where the pathogen is passed to others.
  • What are the two general ways pathogens are transmitted?
    Pathogens are transmitted via vertical transmission and horizontal transmission.
  • How is vertical transmission defined?
    Vertical transmission is the direct transfer of a pathogen from mother to infant during pregnancy, birth, or breastfeeding.
  • Give an example of a disease transmitted through vertical transmission.
    HIV is commonly transmitted from an infected mother to her baby during birth.
  • What is horizontal transmission?
    Horizontal transmission refers to any method of disease transmission that is not vertical, including direct and indirect routes.
  • What are the two subtypes of horizontal transmission?
    Horizontal transmission can be direct or indirect.
  • Describe direct horizontal transmission.
    Direct horizontal transmission is when a pathogen is transferred directly from the reservoir to another person.
  • Describe indirect horizontal transmission.
    Indirect horizontal transmission occurs when the pathogen is not transferred directly from the reservoir but still reaches the host eventually.
  • Can horizontal transmission occur between humans and nonhuman organisms or objects?
    Yes, horizontal transmission can occur between humans, animals, or environmental objects and humans.
  • What is airborne transmission and which type of transmission does it fall under?
    Airborne transmission is a type of horizontal transmission where pathogens are spread through the air.
  • How is COVID-19 commonly transmitted?
    COVID-19 is commonly transmitted via airborne horizontal transmission.
  • Why is understanding disease transmission important?
    Understanding disease transmission is crucial for infection control, epidemiology, and public health strategies.
  • What is a reservoir of infection?
    A reservoir of infection is the source where a pathogen lives and multiplies before transmission.
  • What is a portal of exit in the chain of infection?
    A portal of exit is the route by which a pathogen leaves its reservoir to begin transmission.
  • What distinguishes vertical from horizontal transmission?
    Vertical transmission is mother-to-infant, while horizontal transmission includes all other routes between individuals or objects.