Host Defences and Pathogen Colonization Quiz

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Which term refers to organisms that cause disease upon infection and are not normally associated with the host?

Opportunistic pathogen

Normal flora

Pathogen transmission

Primary pathogen (correct)

What was the first pathogen observed by scientists as described by Filippo Pacini in 1854?

Influenza virus

Vibrio cholera (correct)

HIV

Yersinia pestis

Which type of pathogen causes disease under certain conditions and can be members of the normal flora?

Pathogen transmission

Normal flora

Opportunistic pathogen (correct)

Primary pathogen

Which of the following is an example of an opportunistic pathogen?

Candida albicans Signup and view all the answers

What mode of transmission classifies pathogens based on food, air, water, blood, or vectors?

Transmission routes Signup and view all the answers

Which organism is responsible for causing diseases like strep throat and tuberculosis?

Staphylococcus aureus Signup and view all the answers

What is the term used to describe the ability of a pathogen to adhere to a host?

Adherence Signup and view all the answers

Which factor plays a role in promoting disease formation by helping a pathogen to colonize a host?

Pathogenicity Signup and view all the answers

What is the term that defines the degree of pathogenicity of a microorganism?

Virulence Signup and view all the answers

Which ability of a pathogen is crucial for overcoming the host's defenses and leading to infection?

Adherence to host tissues Signup and view all the answers

What characteristic increases the likelihood of disease occurrence in a host due to a pathogen?

High transmissibility Signup and view all the answers

Which defense mechanism of a pathogen contributes to its ability to persist and infect a host?

Ability to evade host defenses Signup and view all the answers

How do wounds in barrier epithelia contribute to pathogen colonization of the host?

They provide a direct pathway for pathogens to enter the host's interior. Signup and view all the answers

Which of the following is NOT mentioned as a location where protective boundaries are less robust in the human body?

Skin Signup and view all the answers

In what way can a pathogen efficiently cross the skin to infect a host?

By hitching a ride in the saliva of a biting insect Signup and view all the answers

Why is adherence an essential step in bacterial pathogenesis?

To colonize a new host successfully Signup and view all the answers

What feature enables viruses spread by insect bites to cause diseases like yellow fever?

Their ability to replicate in both insect cells and mammalian cells Signup and view all the answers

Why do dedicated pathogens not need to wait for a well-timed wound to infect a host?

Because they can utilize strategies like hitching a ride in biting insects' saliva Signup and view all the answers