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10 sample questions
Preventive Medicine MCQ Practice Test
Illness avoidance strategies
Q1. What is the primary goal of the US Centers for Disease Control and Prevention\u2019s (CDC) Waterborne Disease and Outbreak Surveillance System (WBDOSS)?
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A. To monitor and report on waterborne disease outbreaks in real-time ✓
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B. To investigate and control waterborne disease outbreaks in high-risk communities
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C. To develop and implement national guidelines for waterborne disease prevention and control
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D. To provide technical assistance to state and local health departments in managing waterborne disease outbreaks
Explanation: The CDC\u2019s WBDOSS aims to monitor and report on waterborne disease outbreaks in real-time, allowing for timely identification and response to emerging public health threats. This system provides critical data on waterborne disease outbreaks, enabling public health officials to track trends, identify high-risk areas, and develop effective prevention and control strategies.
Q2. A community-based “Hepatitis B Elimination Program” aims to reduce the prevalence of hepatitis B virus (HBV) infection in a high-prevalence population. Which of the following strategies is NOT a recommended component of this program?
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A. Mass vaccination of all infants at birth
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B. Screening and treatment of chronic HBV carriers
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C. Public education campaigns to promote safe sex practices and reduce high-risk behaviors
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D. Forced quarantine and isolation of individuals with active HBV infection ✓
Explanation: Forced quarantine and isolation of individuals with active HBV infection are not recommended components of a hepatitis B elimination program. Instead, the focus is on identifying and treating chronic carriers, vaccinating high-risk populations, and promoting public health education to reduce transmission.
Q3. Which of the following public health strategies is most effective in reducing the incidence of vaccine-preventable diseases in low-\u002dresource communities?
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A. Implementing a\u0020 universal\u0020 influenza\u0020 vaccination\u0020 program
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B. Establishing\u0020 partnerships\u0020 with\u0020 local\u0020 health\u0020 organizations\u0020 to\u0020 increase\u0020 access\u0020 to\u0020 vaccines ✓
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C. Developing\u0020 and\u0020 implementing\u0020 targeted\u0020 health\u0020 education\u0020 campaigns\u0020 to\u0020 promote\u0020 vaccination\u0020 uptake
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D. Providing\u0020 financial\u0020 incentives\u0020 to\u0020 healthcare\u0020 providers\u0020 for\u0020 administering\u0020 vaccines
Explanation: This strategy is effective because it leverages existing community resources and relationships to increase access to vaccines, which can be particularly challenging in low-resource settings. By partnering with local health organizations, public health officials can help to overcome barriers to vaccination, such as lack of access to healthcare facilities or limited availability of vaccines.
Q4. A community-based program aims to reduce the incidence of group A streptococcal pharyngitis among school-aged children. Which of the following is the most effective strategy to achieve this goal?
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A. Mass vaccination of all children in the community
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B. Targeted vaccination of children in close contact with carriers
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C. Educational campaigns to promote hygiene practices and throat self-examination ✓
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D. Screening of all children for group A streptococcal pharyngitis
Explanation: Group A streptococcal pharyngitis is largely preventable through good hygiene practices, such as frequent handwashing and proper throat self-examination. This is the most effective strategy for reducing the incidence of the disease in a community setting, as it does not require the availability of vaccines or the resources required for screening.
Q5. Seasonal influenza spreads from person to person primarily through:
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A. respiratory droplets expelled when infected people cough, sneeze, or talk ✓
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B. mosquito bites
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C. eating undercooked poultry
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D. skin contact with contaminated surfaces only
Explanation: Influenza transmits mainly via respiratory droplets and aerosols from infected individuals, which is why vaccination, hand hygiene, and covering coughs are the core control measures. Mosquitoes play no role; poultry relates to avian strains, not routine seasonal flu.
Q6. Which of the following strategies is most effective in reducing the transmission of antibiotic-resistant bacteria in healthcare settings?
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A. Enhanced infection control measures, including improved hand hygiene and contact precautions ✓
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B. Implementation of a hospital-wide antibiotic stewardship program
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C. Routine screening of all patients for antibiotic-resistant bacteria upon admission
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D. Installation of air purification systems to reduce airborne transmission
Explanation: Enhanced infection control measures, including improved hand hygiene and contact precautions, have been shown to be effective in reducing the transmission of antibiotic-resistant bacteria in healthcare settings. This includes the use of personal protective equipment, proper cleaning and disinfection of surfaces, and cohorting of patients with suspected or confirmed antibiotic-resistant infections.
Q7. A community-based “Hepatitis B Vaccine Birth Dose” program is most likely to be effective in reducing the transmission of Hepatitis B to newborns in a region with a high prevalence of Hepatitis B surface antigen (HBsAg) positivity among pregnant women, if the program is implemented with the following key components:
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A. Routine vaccination of all newborns at birth, regardless of maternal HBsAg status ✓
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B. Targeted vaccination of newborns born to mothers with unknown or positive HBsAg status
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C. Vaccination of all pregnant women during the third trimester to provide maternal immunity to newborns
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D. Enhanced surveillance and contact tracing of individuals with acute Hepatitis B
Explanation: This approach ensures that all newborns receive the first dose of Hepatitis B vaccine at birth, providing immediate protection against HBV transmission, regardless of the mother's HBsAg status. This is particularly effective in high-prevalence settings, where the risk of mother-to-child transmission is higher.
Q8. A community-based “Healthy Homes” program aims to reduce lead poisoning among low-income children. The program focuses on providing lead-safe home renovation services and distributing free lead testing kits. However, the program’s effectiveness is compromised by the lack of …
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A. a robust data collection system to track program outcomes ✓
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B. regular inspections of participating homes to ensure compliance with lead-safe work practices
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C. a comprehensive public awareness campaign to educate residents about the risks of lead poisoning
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D. a partnership with local healthcare providers to offer free lead screening for children
Explanation: A robust data collection system is essential to track program outcomes, identify areas for improvement, and make data-driven decisions to optimize the program's effectiveness. Without such a system, the program's impact on reducing lead poisoning among low-income children cannot be accurately measured or evaluated.
Q9. Which of the following strategies is most effective in reducing the incidence of vaccine-preventable diseases in a population with low vaccination rates?
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A. Implementing a mandatory vaccination policy for all school-aged children
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B. Providing free vaccinations to low-income families and conducting targeted outreach to increase vaccination rates ✓
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C. Establishing a vaccination registry to track vaccination status and identify areas for improvement
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D. Requiring healthcare providers to report vaccination rates to public health officials
Explanation: This strategy addresses the root cause of low vaccination rates (financial barriers) and uses a targeted approach to increase vaccination rates, making it the most effective option.
Q10. A community-based “Hepatitis B Control Program” is implemented in a rural area with a high prevalence of hepatitis B infection. The program aims to reduce the incidence of hepatitis B-related liver cancer. Which of the following strategies is most likely to be effective in achieving this goal?
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A. Mass vaccination of all residents, regardless of their serological status
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B. Screening and vaccination of high-risk groups, such as healthcare workers and individuals with a family history of hepatitis B ✓
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C. Enhanced surveillance for liver cancer and early detection through ultrasound screening
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D. Education and awareness campaigns to promote safe injection practices and reduce transmission through needle sharing
Explanation: Screening and vaccination of high-risk groups is a targeted approach that can effectively reduce the incidence of hepatitis B-related liver cancer in a community with a high prevalence of the infection. This strategy is more cost-effective and efficient than mass vaccination, which may not be necessary for individuals who are already immune to hepatitis B.
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