Infectious Disease in the Community Practice Questions

40 multiple-choice questions on Infectious disease in the community for paramedic and EMT students, from Chapter 3 (Public Health). Read each question, pick your answer, then tap Show answer to check it and read the explanation.

40 practice questions

1. Vaccination protects the community by:

   1. A. Treating infections already present in patients
   2. B. Making hand hygiene and masking unnecessary
   3. C. Protecting only the children who receive it
   4. D. Reducing susceptible people so spread slows
   Show answer

   Answer: D. Reducing susceptible people so spread slows

   That indirect protection is herd immunity.

2. Isolation is used for people who:

   1. A. Have refused recommended vaccination
   2. B. Recently traveled internationally
   3. C. Were exposed but are not yet ill
   4. D. Are known or believed to be infected
   Show answer

   Answer: D. Are known or believed to be infected

   Quarantine applies to exposed but not yet ill people. Isolation keeps them from infecting others.

3. Reportable diseases are:

   1. A. Conditions providers must report by law
   2. B. Diseases that have no effective treatment
   3. C. Any illness a paramedic finds unusual
   4. D. Only sexually transmitted infections
   Show answer

   Answer: A. Conditions providers must report by law

   Reporting starts outbreak investigation and contact tracing. Reports go to the health department.

4. Contact tracing is used to:

   1. A. Find and notify people exposed to a case
   2. B. Trace a food outbreak to its supplier
   3. C. Test every resident of the affected area
   4. D. Isolate people who have tested positive
   Show answer

   Answer: A. Find and notify people exposed to a case

   It only works when reporting happens quickly. Contacts can then be tested or monitored. Tracing a food source is part of an outbreak investigation, mass testing is screening, and isolating confirmed cases is isolation; contact tracing finds the people exposed to a case.

5. An outbreak investigation typically begins with:

   1. A. Starting mass vaccination before cases are confirmed
   2. B. Closing schools and public gathering places
   3. C. Treating every resident in the affected area
   4. D. Confirming cases and defining who, where, and when
   Show answer

   Answer: D. Confirming cases and defining who, where, and when

   The pattern points to the source.

6. Seasonal influenza is a public health priority because it:

   1. A. Causes major illness and death each year
   2. B. Cannot be prevented by any available vaccine
   3. C. Is harmless except in infants under one
   4. D. Affects only children and their caregivers
   Show answer

   Answer: A. Causes major illness and death each year

   Annual vaccination is the main tool. Older adults and people with chronic disease are hit hardest.

7. Tuberculosis remains a public health concern because it:

   1. A. Occurs only in travelers returning from overseas
   2. B. Has no reliable screening or diagnostic test
   3. C. Is airborne and needs months of treatment
   4. D. Is easily cured with a few days of antibiotics
   Show answer

   Answer: C. Is airborne and needs months of treatment

   EMS providers are screened for exposure because of close patient contact. Drug-resistant strains are emerging.

8. Vector-borne illnesses such as Lyme disease and West Nile virus are controlled mainly through:

   1. A. Isolation of infected patients in hospitals
   2. B. Vector control and personal protection
   3. C. Antibiotic prophylaxis for all residents
   4. D. Routine vaccination of the human population
   Show answer

   Answer: B. Vector control and personal protection

   Reducing mosquito breeding sites is a classic environmental control. Public education supports both.

9. During a respiratory disease outbreak, EMS agencies commonly implement:

   1. A. PPE once a diagnosis is confirmed
   2. B. Transport of all patients regardless of need
   3. C. Holding calls until crews are tested
   4. D. Dispatch screening and expanded PPE
   Show answer

   Answer: D. Dispatch screening and expanded PPE

   Dispatch screening gives crews advance warning. Response procedures are often modified too. Waiting for a diagnosis exposes crews early in the call, and response cannot be held for staff testing.

10. Antibiotic resistance is worsened by:

    1. A. Unnecessary or incomplete antibiotic use
    2. B. Taking probiotics with antibiotics
    3. C. Frequent hand hygiene with alcohol-based rubs
    4. D. Treating fevers with acetaminophen
    Show answer

    Answer: A. Unnecessary or incomplete antibiotic use

    Each unnecessary course selects for resistant organisms. Probiotics and fever reducers do not drive resistance, and isolation and hand hygiene limit its spread.

11. Vaccine hesitancy is a public health concern because it:

    1. A. Is rare and has little effect on the population
    2. B. Lowers coverage below herd immunity levels
    3. C. Affects only the unvaccinated individual's health
    4. D. Cannot be addressed through any communication
    Show answer

    Answer: B. Lowers coverage below herd immunity levels

    Measles outbreaks have followed declines in coverage. Low coverage allows outbreaks.

12. Addressing vaccine concerns works best through:

    1. A. Respectful listening and trusted information
    2. B. Relying on mandates alone without discussion
    3. C. Dismissing concerns as simple misinformation
    4. D. Firmly confronting incorrect beliefs with facts
    Show answer

    Answer: A. Respectful listening and trusted information

    Trust changes minds more than facts alone.

13. Quarantine applies to people who:

    1. A. Are ill with a confirmed infection
    2. B. Are immune after prior infection
    3. C. Were exposed but are not yet ill
    4. D. Have refused required vaccination
    Show answer

    Answer: C. Were exposed but are not yet ill

    It covers the incubation period.

14. A paramedic was exposed to a measles patient without an N95 and has no record of immunity. She feels well. What will public health most likely require?

    1. A. Isolation at home only until her rash has faded
    2. B. No action at all unless she develops symptoms
    3. C. Quarantine from work through the incubation period
    4. D. Immediate antibiotic prophylaxis for the exposure
    Show answer

    Answer: C. Quarantine from work through the incubation period

    Quarantine restricts people who were exposed but are not yet sick, here through measles' incubation period (about days 5 to 21 after exposure). Isolation is for people who are already infected, and she has no rash. Doing nothing risks spread, since measles is contagious before the rash appears. Antibiotics do not treat measles, a virus. MMR vaccine within 72 hours or immune globulin within 6 days are the post-exposure options.

15. A patient you transported is diagnosed with meningococcal meningitis. You intubated him without a mask. Why does the health department ask the hospital for a list of EMS crew members?

    1. A. To report the crew to the state EMS office
    2. B. To arrange vaccination for the whole agency
    3. C. To find exposed contacts who may need prophylaxis
    4. D. To confirm the patient's diagnosis for the hospital
    Show answer

    Answer: C. To find exposed contacts who may need prophylaxis

    Contact tracing finds people with close exposure, and unprotected airway management counts, so they can get timely prophylaxis such as rifampin, ciprofloxacin, or ceftriaxone. It is not a report to the licensing office, vaccination is not the post-exposure measure, and the diagnosis comes from the lab, not from a contact list.

16. Reportable diseases must be reported to:

    1. A. The CDC directly, by each individual provider
    2. B. The local police or sheriff's department
    3. C. The receiving hospital alone, not any agency
    4. D. The local or state health department
    Show answer

    Answer: D. The local or state health department

    The health department forwards data nationally. Requirements follow state law.

17. Which is typically a reportable condition?

    1. A. Strep throat
    2. B. Mononucleosis
    3. C. Tuberculosis
    4. D. Head lice
    Show answer

    Answer: C. Tuberculosis

    Lists vary by state. Measles, hepatitis, and certain sexually transmitted infections are also reportable. Strep throat, mononucleosis, and head lice are common but generally are not reportable conditions.

18. Outbreak investigation steps typically include:

    1. A. Confirming, describing, hypothesizing, and controlling
    2. B. Closure of facilities as the first and only step
    3. C. Media alerts followed by waiting for new cases
    4. D. Treatment of cases with no further investigation
    Show answer

    Answer: A. Confirming, describing, hypothesizing, and controlling

    It is a systematic process. Cases are defined and described by time, place, and person before hypotheses are tested.

19. An epidemic curve shows:

    1. A. Cases over time, revealing source and type
    2. B. Severity of illness among confirmed cases
    3. C. Geographic location of cases across a region
    4. D. Age distribution of the affected patients
    Show answer

    Answer: A. Cases over time, revealing source and type

    A point source produces a single sharp peak.

20. A point-source outbreak suggests:

    1. A. Spread by mosquitoes or other vectors
    2. B. A single common exposure, such as one meal
    3. C. Person-to-person spread over several weeks
    4. D. Ongoing transmission within a household
    Show answer

    Answer: B. A single common exposure, such as one meal

    Cases cluster within one incubation period. Contaminated food at one event is a classic example.

21. A propagated outbreak suggests:

    1. A. A single exposure at one shared event
    2. B. Contaminated food from a single supplier
    3. C. Person-to-person spread over generations
    4. D. Environmental exposure to a chemical toxin
    Show answer

    Answer: C. Person-to-person spread over generations

    The curve shows multiple waves.

22. Foodborne illness outbreaks are commonly caused by:

    1. A. Bacteria only, since viruses can't survive in food
    2. B. Salmonella, E. coli, norovirus, and Listeria
    3. C. Viruses only, since bacteria die when cooked
    4. D. Chemical contaminants rather than infections
    Show answer

    Answer: B. Salmonella, E. coli, norovirus, and Listeria

    Restaurant inspection prevents many.

23. Waterborne disease control depends on:

    1. A. Treatment, monitoring, and infrastructure
    2. B. Switching communities to bottled water
    3. C. Boiling all drinking water at home
    4. D. Individual home filters in every household
    Show answer

    Answer: A. Treatment, monitoring, and infrastructure

    Treated water is a major public health achievement.

24. Hand hygiene campaigns are effective because:

    1. A. They can replace vaccination for most diseases
    2. B. Hands spread many infections and washing is cheap
    3. C. Soap reliably kills every organism on the skin
    4. D. They are mandated by federal workplace law
    Show answer

    Answer: B. Hands spread many infections and washing is cheap

    They reduce respiratory and GI illness.

25. Seasonal influenza vaccination is recommended for:

    1. A. Everyone 6 months and older
    2. B. Only children under 5 years
    3. C. Only adults 65 and older
    4. D. Only healthcare and EMS workers
    Show answer

    Answer: A. Everyone 6 months and older

    Coverage protects vulnerable groups. Exceptions are rare.

26. Pneumococcal vaccination targets:

    1. A. Children under two, with adults never needing it
    2. B. Healthcare workers, as an occupational requirement
    3. C. Young children, older adults, and high-risk groups
    4. D. International travelers to endemic regions
    Show answer

    Answer: C. Young children, older adults, and high-risk groups

    It prevents pneumonia and meningitis. High-risk groups include people with certain conditions.

27. Respiratory syncytial virus is significant because it:

    1. A. Is untreatable and has no preventive options
    2. B. Is serious in infants and older adults
    3. C. Is rare and seldom causes hospitalization
    4. D. Affects only adults with chronic lung disease
    Show answer

    Answer: B. Is serious in infants and older adults

    Prevention products now exist.

28. Pertussis vaccination of adults protects:

    1. A. Only older adults living in the home
    2. B. Only the vaccinated adult themselves
    3. C. No one else, since adults rarely transmit it
    4. D. Infants too young to be fully vaccinated
    Show answer

    Answer: D. Infants too young to be fully vaccinated

    Infants are at highest risk of death. This is called cocooning.

29. Sexually transmitted infection control relies on:

    1. A. Abstinence-only education in schools
    2. B. Condom distribution as the only strategy
    3. C. Screening, treatment, and partner notification
    4. D. Treatment alone once symptoms finally appear
    Show answer

    Answer: C. Screening, treatment, and partner notification

    Many infections are asymptomatic. Education is also part of control.

30. HIV prevention now includes:

    1. A. Education alone about sexual transmission risks
    2. B. Abstinence-only programs for teens and young adults
    3. C. Condom distribution as the only prevention method
    4. D. Testing, treatment, PrEP, and harm reduction
    Show answer

    Answer: D. Testing, treatment, PrEP, and harm reduction

    Treatment reduces transmission to near zero. PrEP is pre-exposure prophylaxis.

31. Harm reduction programs such as syringe services:

    1. A. Are illegal in every US state
    2. B. Reduce HIV and hepatitis transmission
    3. C. Have no measurable public health effect
    4. D. Increase drug use in the community
    Show answer

    Answer: B. Reduce HIV and hepatitis transmission

    Evidence supports them. They also connect people with treatment.

32. Antimicrobial stewardship means:

    1. A. Treating viral infections early with antibiotics
    2. B. Using the broadest antibiotic available first
    3. C. Using antibiotics only when needed and correctly
    4. D. Avoiding antibiotics whenever possible, even for sepsis
    Show answer

    Answer: C. Using antibiotics only when needed and correctly

    Resistance is a growing threat.

33. Healthcare-associated infections are reduced by:

    1. A. Nothing; they are unavoidable in healthcare
    2. B. Hand hygiene, device care, and cleaning
    3. C. Prophylactic antibiotics for all patients
    4. D. Isolation of every admitted patient
    Show answer

    Answer: B. Hand hygiene, device care, and cleaning

    EMS equipment cleaning contributes. Environmental cleaning is part of it.

34. One Health refers to:

    1. A. Focusing on human medicine as one discipline
    2. B. A single unified hospital infection policy
    3. C. Linking human, animal, and environmental health
    4. D. Veterinary care for livestock and pets only
    Show answer

    Answer: C. Linking human, animal, and environmental health

    Many emerging diseases originate in animals.

35. Zoonotic diseases are:

    1. A. Transmitted from animals to humans
    2. B. Spread only from human to human
    3. C. Always fatal once symptoms begin
    4. D. Too rare to matter in the United States
    Show answer

    Answer: A. Transmitted from animals to humans

    Rabies and avian influenza are examples.

36. Travel-related illness should be suspected when:

    1. A. Fever follows travel to an endemic area
    2. B. Only when the patient also has a rash
    3. C. Never, since travel illness is usually minor
    4. D. Only in children returning from abroad
    Show answer

    Answer: A. Fever follows travel to an endemic area

    Ask about travel history.

37. Pandemic preparedness in EMS includes:

    1. A. Public communication plans as the sole measure
    2. B. Staff vaccination as the only needed measure
    3. C. PPE stockpiles, surge plans, and staff protection
    4. D. No special planning beyond daily operations
    Show answer

    Answer: C. PPE stockpiles, surge plans, and staff protection

    Recent experience reshaped these plans. Alternative care protocols are also included.

38. During a pandemic, EMS systems may adopt:

    1. A. Suspension of service to all low-acuity calls
    2. B. Dispatch screening, telehealth, and treat-in-place
    3. C. No changes to normal operating procedures
    4. D. PPE changes only, with no other adjustments
    Show answer

    Answer: B. Dispatch screening, telehealth, and treat-in-place

    Flexibility preserved capacity. Modified response is also common.

39. Public health messaging during an outbreak should be:

    1. A. Delayed until all facts are certain
    2. B. Minimal, to avoid causing public panic
    3. C. Issued only by federal government agencies
    4. D. Timely, accurate, consistent, and trusted
    Show answer

    Answer: D. Timely, accurate, consistent, and trusted

    Mixed messages erode trust.

40. EMS providers can support outbreak control by:

    1. A. Leaving reporting to the hospital lab
    2. B. Transporting contacts for testing
    3. C. Recognizing patterns and reporting them
    4. D. Limiting their role to patient transport
    Show answer

    Answer: C. Recognizing patterns and reporting them

    They are often the first to notice clusters. Using precautions and sharing accurate information also help. Field observations reach public health sooner than lab reports alone, and transporting well contacts misuses ambulances.