Public Health Response to Bioterrorism — MCQs
Which of the following is NOT a core component of the WHO's global STI control strategy?
You are the MO in charge in a PHC and there has been a plague epidemic in your area. Which of the following measures is the LEAST appropriate for controlling epidemic?
Which of the following strategies are part of the National Leprosy Control Programme?
You are working in a primary health center (PHC) situated in a high seismic zone. Which of the following actions should you take as part of preparedness for an emergency?
In dengue surveillance, indices that are commonly used to monitor Aedes aegypti infestation levels are all, EXCEPT:
The Roll Back Malaria programme focused mainly on
A 28-year-old patient presents with high-grade fever, severe cough, and progressive dyspnea. The patient lives near a poultry farm where there has been a recent bird flu outbreak. What is the most appropriate diagnostic test?
Which of the following diseases is primarily monitored under the Integrated Disease Surveillance Program (IDSP)?
Which disease comes under international surveillance?
Patients are categorized on the basis of chances of survival in Disaster management:
Public Health Response to Bioterrorism Indian Medical PG Practice Questions and MCQs
Question 1: Which of the following is NOT a core component of the WHO's global STI control strategy?
- A. Case management
- B. Universal mandatory screening (Correct Answer)
- C. Strategic information systems
- D. Prevention services
Explanation: ***Universal mandatory screening*** - While screening is part of STI control, **universal mandatory screening** for all STIs in the general population is not a core component of the WHO's strategy due to feasibility, cost, and ethical considerations. - The strategy emphasizes **targeted screening** for at-risk populations and opportunistic screening. *Case management* - **Case management**, including accurate diagnosis and effective treatment, is a critical component for managing current infections and preventing further transmission. - This involves syndromic or etiologic approaches to treatment and partner notification. *Strategic information systems* - **Strategic information systems** are essential for monitoring trends, evaluating interventions, and informing policy decisions related to STI control. - This includes surveillance data, program monitoring, and research. *Prevention services* - **Prevention services** are a cornerstone of the WHO's strategy, aiming to reduce the incidence of new infections. - These services encompass health education, condom promotion and distribution, vaccination, and pre-exposure prophylaxis (PrEP).
Question 2: You are the MO in charge in a PHC and there has been a plague epidemic in your area. Which of the following measures is the LEAST appropriate for controlling epidemic?
- A. Isolation of contacts
- B. Rapid treatment of cases with streptomycin
- C. Vaccination of all susceptible individuals (Correct Answer)
- D. Early diagnosis and notification
Explanation: ***Vaccination of all susceptible individuals*** - While beneficial for prevention, mass vaccination during an ongoing plague epidemic is **logistically challenging** and **too slow** to effectively control the immediate spread. - The incubation period of plague is short, and an effective vaccine often requires multiple doses and time to induce immunity, making it less suitable for **rapid epidemic containment**. *Isolation of contacts* - **Isolating contacts** helps prevent the disease from spreading further by separating potentially infected individuals who may be asymptomatic or in the incubation period. - This measure is crucial in **breaking chains of transmission** and limiting the epidemic's reach. *Rapid treatment of cases with streptomycin* - **Early and rapid treatment** of confirmed plague cases with effective antibiotics like **streptomycin** is a cornerstone of epidemic control, significantly reducing mortality and infectivity. - This intervention quickly minimizes the source of infection, preventing further transmission to others. *Early diagnosis and notification* - **Early diagnosis** allows for prompt initiation of treatment and isolation, while **notification** triggers public health responses such as contact tracing and surveillance. - These steps are essential for understanding the scope of the epidemic and implementing appropriate control measures efficiently.
Question 3: Which of the following strategies are part of the National Leprosy Control Programme?
- A. Early detection of cases and short course multi-drug therapy (Correct Answer)
- B. Chemoprophylaxis with dapsone and rehabilitation
- C. Short course multi-drug therapy and chemoprophylaxis
- D. Rehabilitation and early detection of cases
Explanation: ***Early detection of cases and short course multi-drug therapy*** - The primary strategy of the National Leprosy Control Programme (NLCP) is to actively identify new cases early to prevent disabilities. - **Multi-drug therapy (MDT)**, a short-course regimen, is administered to cure the disease and interrupt transmission. - This combination represents the **core control strategy** of NLCP. *Chemoprophylaxis with dapsone and rehabilitation* - **Chemoprophylaxis with dapsone** is not a standard strategy under NLCP due to concerns about resistance and limited effectiveness for mass prevention. - **Rehabilitation** is important for disability management but is a secondary/tertiary prevention strategy, not a primary control measure. *Short course multi-drug therapy and chemoprophylaxis* - While **MDT** is a cornerstone of NLCP, **chemoprophylaxis** is not included as a widespread intervention. - The focus remains on treating diagnosed cases rather than mass preventive drug administration. *Rehabilitation and early detection of cases* - **Early detection** is indeed a key component, but pairing it with **rehabilitation** alone misses the critical treatment component. - The core control strategy requires both early detection **and MDT treatment**, not just detection and rehabilitation.
Question 4: You are working in a primary health center (PHC) situated in a high seismic zone. Which of the following actions should you take as part of preparedness for an emergency?
- A. Ensure all financial and other resources are available for disaster preparedness.
- B. Increase public awareness through campaigns and loudspeakers.
- C. Follow instructions given over the phone or radio by higher officials.
- D. Conduct a simulation for the disaster and assess the response. (Correct Answer)
Explanation: ***Conduct a simulation for the disaster and assess the response.*** - **Simulation exercises** are crucial for testing the effectiveness of a disaster preparedness plan and identifying weaknesses in the response system. - This allows for refinement of protocols, training of personnel, and ensuring that all team members understand their roles during an actual emergency. *Ensure all financial and other resources are available for disaster preparedness.* - While important for effective disaster management, simply "ensuring" resources are available is not an action of preparedness, but rather an **enabling condition**. - This statement focuses on the availability of resources rather than a proactive step to prepare the PHC for an emergency. *Increase public awareness through campaigns and loudspeakers.* - **Public awareness campaigns** are vital for community preparedness, but this action is primarily for the general population and not a specific preparedness action for the PHC itself in terms of its operational readiness. - While a PHC might be involved in public awareness, its core preparedness involves internal actions to ensure its functionality during a disaster. *Follow instructions given over the phone or radio by higher officials.* - This describes a reaction during or immediately before a disaster, rather than a proactive **preparedness measure**. - Relying solely on real-time instructions from higher officials during an emergency without prior planning can lead to delays and inefficiencies.
Question 5: In dengue surveillance, indices that are commonly used to monitor Aedes aegypti infestation levels are all, EXCEPT:
- A. Street index (Correct Answer)
- B. House index
- C. Breteau index
- D. Pupae index
Explanation: ***Street index*** - The **Street index** is not a standard entomological index used for monitoring *Aedes aegypti* infestation levels or density in dengue surveillance. - Surveillance efforts typically focus on household-level indices to assess mosquito breeding sites. *House index* - The **House index** (HI) measures the percentage of houses infested with *Aedes* larvae and/or pupae. - It provides an indication of the proportion of dwellings in an area that serve as mosquito breeding sites. *Breteau index* - The **Breteau index** (BI) calculates the number of positive containers per 100 houses inspected. - It reflects the density of breeding containers and is considered a more sensitive indicator of mosquito population density than the House index. *Pupae index* - The **Pupae index** (PI) measures the average number of pupae per person or per house. - This index is highly correlated with adult mosquito density and is considered the most accurate indicator of potential dengue transmission risk.
Question 6: The Roll Back Malaria programme focused mainly on
- A. IEC campaigns for community awareness
- B. Insecticide treated bed nets (Correct Answer)
- C. Development of larvivorous fishes for eradication of larvae.
- D. Presumptive treatment of malaria case
Explanation: ***Insecticide treated bed nets*** - The **Roll Back Malaria (RBM)** program, launched in 1998, focused significantly on key interventions including the promotion and distribution of **insecticide-treated nets (ITNs)**. - ITNs are highly effective in **preventing mosquito bites**, thus reducing malaria transmission, especially in vulnerable populations. *IEC campaigns for community awareness* - While **Information, Education, and Communication (IEC)** campaigns are crucial for health programs, they were a supportive component rather than the primary focus of RBM's core intervention strategy. - RBM emphasized **tangible interventions** with direct impact on disease transmission. *Development of larvivorous fishes for eradication of larvae* - The use of **larvivorous fish** is a form of biological control, which is typically part of **integrated vector management** but not the central pillar of RBM's strategy. - RBM prioritized interventions with **broad, immediate impact** across larger populations. *Presumptive treatment of malaria case* - **Presumptive treatment** (treating based on symptoms without laboratory confirmation) was an important aspect of early malaria control but not the main strategic thrust of the RBM initiative. - RBM's primary focus was on **prevention and rapid diagnosis/treatment** using effective antimalarials, and vector control strategies.
Question 7: A 28-year-old patient presents with high-grade fever, severe cough, and progressive dyspnea. The patient lives near a poultry farm where there has been a recent bird flu outbreak. What is the most appropriate diagnostic test?
- A. Virus isolation
- B. Rapid antigen test
- C. RT-PCR (Correct Answer)
- D. Antibody detection
Explanation: ***RT-PCR*** - **Reverse transcription polymerase chain reaction (RT-PCR)** is the gold standard for diagnosing avian influenza (bird flu) due to its high sensitivity and specificity. - It directly detects the **viral RNA** and can confirm active infection, which is crucial given the recent bird flu outbreak and the patient's symptoms. *Virus isolation* - **Virus isolation** is a highly specific method but is time-consuming and requires specialized laboratory facilities, making it less suitable for rapid diagnosis in an acute clinical setting. - It is often used for **viral characterization** and surveillance rather than initial patient diagnosis. *Rapid antigen test* - **Rapid antigen tests** for influenza generally have lower sensitivity for avian influenza compared to RT-PCR, leading to a higher risk of false negatives. - While quick, their reduced accuracy might delay appropriate patient management, especially in a potential outbreak scenario. *Antibody detection* - **Antibody detection** (serology) indicates past exposure or infection, as antibodies typically take several days to weeks to develop. - It is not suitable for diagnosing an **acute, active infection** like the current presentation of fever, headache, and rash due to the lag in antibody production.
Question 8: Which of the following diseases is primarily monitored under the Integrated Disease Surveillance Program (IDSP)?
- A. Tuberculosis
- B. HIV
- C. Malaria (Correct Answer)
- D. Diabetes
Explanation: ***Malaria*** - Malaria is a significant public health concern with high incidence and mortality, making its surveillance crucial for **disease control and elimination efforts**. - The IDSP aims for early detection and rapid response to **outbreaks of communicable diseases**, including vector-borne diseases like malaria. *Tuberculosis* - While a major public health issue, **tuberculosis (TB)** is primarily monitored under the **National Tuberculosis Elimination Programme (NTEP)**, which has a dedicated and extensive surveillance system. - The NTEP focuses on active case finding, treatment, and prevention of TB through a specific, robust framework separate from the IDSP's general surveillance. *HIV* - **HIV/AIDS** surveillance is conducted under the **National AIDS Control Organisation (NACO)**, which has a specialized program for monitoring prevalence, incidence, and risk behaviors. - NACO's surveillance includes sentinel surveillance among specific populations and programmatic data collection, distinct from the IDSP's generalized infectious disease monitoring. *Diabetes* - **Diabetes** is a **non-communicable disease** and is not primarily monitored under the IDSP, which focuses on infectious disease outbreaks. - Surveillance for non-communicable diseases like diabetes typically falls under programs dedicated to non-communicable disease prevention and control, focusing on prevalence and risk factors.
Question 9: Which disease comes under international surveillance?
- A. Polio (Correct Answer)
- B. Measles
- C. Hepatitis B
- D. Typhoid
Explanation: ***Polio*** - **Poliomyelitis** is under comprehensive international surveillance through the **Global Polio Eradication Initiative (GPEI)**, a partnership led by WHO, UNICEF, CDC, and Rotary International. - As a disease targeted for **global eradication**, every case of acute flaccid paralysis (AFP) is investigated worldwide, making it subject to the most intensive international surveillance system. - Under **International Health Regulations (IHR) 2005**, wild poliovirus is one of only three diseases that are **mandatorily notifiable** to WHO internationally (along with smallpox and SARS). *Measles* - While measles is under WHO surveillance for elimination efforts in various regions, the surveillance is primarily **regional and national** rather than having the same globally coordinated mandatory notification status as polio. - Measles elimination programs exist but do not have the same international surveillance infrastructure as the polio eradication program. *Hepatitis B* - **Hepatitis B** surveillance focuses on disease burden, vaccination coverage, and prevalence monitoring within countries. - It is **not under international surveillance** with mandatory notification requirements for global eradication purposes. *Typhoid* - **Typhoid fever** is monitored through national surveillance systems, especially in endemic areas. - It is **not part of international surveillance programs** with mandatory reporting to WHO for global eradication.
Question 10: Patients are categorized on the basis of chances of survival in Disaster management:
- A. Tagging
- B. Triage (Correct Answer)
- C. Mitigation
- D. Surge capacity
Explanation: ***Triage*** - **Triage** is the process of sorting and prioritizing patients based on the severity of their injuries and their chances of survival, especially in mass casualty incidents or disasters. - This system ensures that limited resources are allocated to maximize the number of survivors and provide the most effective care. *Tagging* - **Tagging** refers to the physical labeling of patients after they have been triaged, using color-coded tags (e.g., red for immediate, yellow for delayed, green for minor, black for expectant). - It is a result of the triage process, not the process of categorization itself. *Mitigation* - **Mitigation** involves measures taken to reduce the impact of a disaster or emergency, such as constructing earthquake-resistant buildings or developing flood control systems. - It focuses on preventing or lessening the severity of a disaster before it occurs, rather than categorizing patients. *Surge capacity* - **Surge capacity** is the ability of a healthcare system to expand its services and resources in response to an unexpected influx of patients, such as during a pandemic or mass casualty event. - It refers to the operational capability of the system, not the method of patient categorization.
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