What is the main difference between pathogenicity and virulence ?

Pathogenicity is the ability to cause disease; virulence is the severity of the disease.

Pathogenicity is how severe the disease is; virulence is whether it can cause disease.

Pathogenicity is a host factor; virulence is an environmental factor.

Pathogenicity depends on age; virulence depends on sex.

Which of the following are examples of environmental factors that can affect exposure to infectious diseases?

Nutritional status and behavior

The term “appropriate portal of entry” refers to:

The specific site where a pathogen must enter to cause infection

The dose of pathogen required to infect the host

The environmental conditions necessary for pathogen survival

Which of the following are ways agent factors can affect the likelihood of infection?

Infectivity and antigenic stability

Nutritional status and behavior

A community has an influenza outbreak. Many residents are elderly, the weather is cold and dry, and a new influenza strain has emerged. Which combination of factors most likely contributed to the outbreak?

Host: elderly residents; Environment: cold/dry weather; Agent: antigenic changes

Host: healthy residents; Environment: warm weather; Agent: low virulence

Host: children only; Environment: overcrowding; Agent: stable antigen

Host: adults; Environment: humid air; Agent: reduced pathogenicity

Why does the host factor of age contribute to infectious disease outbreaks?

Older individuals have weaker immune systems

Older individuals are more exposed to pathogens in food

Age affects antigenic stability of the pathogen

Age determines environmental conditions

How does an agent factor like antigenic changes influence disease spread?

It allows the pathogen to evade previous immunity

It changes environmental conditions

It improves nutritional status of the host

Bacterial capsules and endotoxins can:

Prevent antibodies from forming entirely

Always be ignored by the immune system

Which of the following are ways that bacteria can evade the host’s immune system?

Producing capsules that inhibit phagocytosis

Secreting endotoxins that destroy phagocytes

The first line of defense in the human body that an infectious agent must penetrate includes:

Physical and chemical barriers such as skin and mucous membranes

Phagocytes and natural killer cells

The main difference between contact transmission and perinatal transmission is:

Contact transmission requires direct or indirect contact; perinatal occurs from mother to child in utero or during delivery

Contact transmission is airborne; perinatal is waterborne

Contact transmission requires a vector; perinatal requires food contamination

Which characteristic makes parasites more resistant to innate immunity compared to bacteria and viruses?

They are large, have resistant cell walls, or can move away from inflamed areas

They rely on cell replication to infect host cells

They produce toxins that suppress immunity

What is the most effective immune defense against parasitic infections?

Humoral (antibody-mediated) immunity

Which of the following is NOT a mechanism parasites use to evade the host immune system?

Rapid cell division within host cells

Movement away from inflamed areas

Fungal infections are usually:

Superficial and often harmless, living on skin and mucous membranes

Systemic and highly pathogenic in healthy individuals

Opportunistic fungal infections are most likely in which group?

Individuals vaccinated against fungi

The key to viral replication within the host is:

Infection and replication inside host cells

Invasion of extracellular fluid

Production of resistant cell walls

What is the primary role of interferons in viral infections?

Interfere with viral replication and protect neighboring cells

Which immune system component is most important for recognizing and killing virally infected cells?

T cells recognizing altered self-MHC antigens

Viruses can mutate at a high rate. This allows them to:

Become resistant to interferons

Acute and convalescent serum testing is preferred because:

It shows changes in antibody levels over time

Measuring a single antibody level in a patient can help determine:

Past infection or immune status due to vaccination

A patient with HIV develops a fungal lung infection. This is most likely due to:

Opportunistic infection because of immunocompromised status

A patient presents with fever and malaise. Acute and convalescent sera show rising IgG and IgM titers. This lab finding suggests:

Parasitic exposure without infection

Which lab result would suggest that a patient is immune to a previously encountered pathogen due to vaccination?

High IgG levels with low or absent IgM

Infectious Diseases

University

•

66 Qs

Similar activities

Ch6 - Ecosystems & Communities

University

•

65 Qs

SP 22 Nutrition Practice

University

•

70 Qs

Neuro ED 2022

University

•

65 Qs

Tides, Gravity and Scaling

8th Grade - University

•

63 Qs

IQ: AI THÔNG MINH HƠN HỌC SINH MẦM NON

1st Grade - Professional Development

•

62 Qs

Bull Gk-01

University - Professional Development

•

70 Qs

2.3: Ctenophora-Annelida Test Prep (Master Copy) 2025

11th Grade - University

•

63 Qs

ANAPHY - Chapter 2

University

•

64 Qs

Infectious Diseases

Quiz

•

Science

•

University

•

Practice Problem

•

Medium

•

NGSS

HS-LS4-4, HS-LS3-2, HS-LS4-2

Standards-aligned

Kayla Miller

Used 1+ times

FREE Resource

66 questions

Show all answers

MULTIPLE CHOICE QUESTION

30 mins • 1 pt

Which of the following factors directly affects an individual’s susceptibility to infectious diseases?

Air quality

Immune status

Geography

Occupational setting

Tags

NGSS.HS-LS3-2

MULTIPLE CHOICE QUESTION

30 mins • 1 pt

The term virulence refers to:

The ability of the host to fight infection

The severity or harmfulness of a pathogen

The ability of an agent to remain stable in the environment

The age of the host

Tags

NGSS.HS-LS4-2

MULTIPLE CHOICE QUESTION

30 mins • 1 pt

Which of the following is considered an environmental factor influencing disease transmission?

Nutritional status

Pathogenicity

Housing conditions

Immunogenicity

Tags

NGSS.HS-LS2-7

MULTIPLE CHOICE QUESTION

30 mins • 1 pt

Antigenic stability is important because:

It determines how easily a pathogen infects a host

It impacts the severity of symptoms

It influences the portal of entry

It affects the ability of the immune system to recognize the pathogen

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-4

MULTIPLE CHOICE QUESTION

30 mins • 1 pt

A sufficiently large dose of an organism is necessary to produce infection. This is an example of a factor related to:

Agent

Host

Environment

Portal of entry

MULTIPLE CHOICE QUESTION

30 mins • 1 pt

Infectivity refers to the ability of an agent to cause severe disease in a host.

True

False

MULTIPLE CHOICE QUESTION

30 mins • 1 pt

Age, sex, and behavior are host factors that influence disease transmission.

True

False

Create a free account and access millions of resources

Create resources

Host any resource

Get auto-graded reports

Continue with Google

Continue with Email

Continue with Classlink

Continue with Clever

or continue with

Microsoft

Apple

Others

Already have an account?

Similar Resources on Wayground

65 questions

Modern technologies

Quiz

•

University

61 questions

Final Test Grade 3 Semester 2 XZ by Ms. Nita Little Star Course

Quiz

•

3rd Grade - University

71 questions

Unit 8 Review Ecosystems

Quiz

•

6th Grade - University

66 questions

ESS.8.3 Water Quality

Quiz

•

8th Grade - University

70 questions

Almost Anatomy Mid Exam

Quiz

•

University

67 questions

Quiz on Matter and Physical Properties

Quiz

•

9th Grade - University

61 questions

7th Grade Semester 2 Final Review

Quiz

•

7th Grade - University

67 questions

SLO 25-26

Quiz

•

4th Grade - University

Popular Resources on Wayground

5 questions

This is not a...winter edition (Drawing game)

Quiz

•

1st - 5th Grade

15 questions

4:3 Model Multiplication of Decimals by Whole Numbers

Quiz

•

5th Grade

25 questions

Multiplication Facts

Quiz

•

5th Grade

10 questions

The Best Christmas Pageant Ever Chapters 1 & 2

Quiz

•

4th Grade

12 questions

Unit 4 Review Day

Quiz

•

3rd Grade

10 questions

Identify Iconic Christmas Movie Scenes

Interactive video

•

6th - 10th Grade

20 questions

Christmas Trivia

Quiz

•

6th - 8th Grade

18 questions

Kids Christmas Trivia

Quiz

•

KG - 5th Grade

Discover more resources for Science

26 questions

Christmas Movie Trivia

Lesson

•

8th Grade - Professio...

7 questions

Different Types of Energy

Interactive video

•

4th Grade - University

20 questions

Slopes and Slope-Intercept Form

Quiz

•

8th Grade - University

7 questions

Force and Motion

Interactive video

•

4th Grade - University

7 questions

Biomolecules (Updated)

Interactive video

•

11th Grade - University

20 questions

Winter/Holiday Trivia

Quiz

•

KG - University

10 questions

WINTER WIN Time - ELA - 12/9/2025

Quiz

•

KG - University

7 questions

Human Impact on Resources

Interactive video

•

4th Grade - University

Infectious Diseases

66 questions

Which of the following factors directly affects an individual’s susceptibility to infectious diseases?

The term virulence refers to:

Which of the following is considered an environmental factor influencing disease transmission?

Antigenic stability is important because:

A sufficiently large dose of an organism is necessary to produce infection. This is an example of a factor related to:

Infectivity refers to the ability of an agent to cause severe disease in a host.

Age, sex, and behavior are host factors that influence disease transmission.

Geography is an example of an agent factor that influences disease transmission.

Nutritional status of an individual can affect their susceptibility to infection.

Air quality is an environmental factor that can impact the spread of infectious diseases.

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Science