GROUP – B (SAQ-10 MARKS) 1. There is a sudden surge of cases of fever with rash among under-five children in a block for the past one week. Which surveillance system is related to this case? Describe the steps of investigation of such occurrences when flagged as outbreaks. Mention control measures that should be instituted. (1+6+3=10) [MsdMCH] 2. Cases of adverse events following immunization (AEFI) are being reported from sub centers of a Block. Due to apprehensions among people, drop outs for immunization are also being increased. How the AEFI are classified — mention with examples. Describe important health managerial functions need to be undertaken to address and overcome the problems in that Block. (5+5=10) [MldMCH] 3. Write the National Immunisation schedule for an infant mentioning age, dose, route and site of administration. Discuss in brief the current strategies of Eradication of Poliomyelitis. (6+4=10) [KPC] 4. As a public health personnel, how you will investigate an outbreak of food poisoning in a hostel. [MJNMCH] 5. Several cases of fever, runny nose, red eyes and rashes all over the body among under-five children were reported from an urban slum of Kolkata. As the municipal health officer of that area, how will you investigate and control the outbreak? (5+5) [DMGMCH] 6. A retrospective cohort study was conducted among 2,000 factory workers to assess the association between exposure to silica dust and development of silicosis. • Define Relative Risk (RR). (1 Mark) • Mention two advantages of a cohort study. (1 Mark) • Calculate RR from the following data and interpret the result. (2 Marks) Exposure status Silicosis Asbestosis Exposed 120 680 Non exposed 30 1170 7. Define epidemic. What are the different types of epidemics? Mention briefly epidemiological investigation of rash & fever in children in a block in Howrah district.(2+2+6) [CNMCH] 8. In block 'X', several children aged 5-10 years were brought to nearest health facility with acute onset of fever, loss of appetite, nausea, and yellowish discoloration of the eyes and skin over a period of two weeks after a village fair with several stalls of fast foods like 'fuchka', 'velpuri', 'jhalmuri' etc. Name the most probable diagnosis? Outline the steps of investigation of this outbreak and the control measures to be adopted. What measures would you recommend to prevent the recurrence of such outbreaks? (2 + 5 + 3) [CMSDH] 9. What do you mean by Control, Elimination and Eradication of a Disease? Discuss objectives, target population, strategies for implementation, and role of MR (Measles/Rubella) campaign in achieving measles elimination and Rubella/CRS control. (3 + 1 + 3 + 3 = 10) [PCSGMCH] 10. You want to compare the effect of two drugs in treatment of hypertension. What will be the appropriate study design? Describe the steps will you follow in the study. What are the biases may arise in this study and how will you control those biases? (1+6+3 = 10) [IQCITY] 11. Enumerate the various modes of transmission of communicable disease. Describe any three different modes with suitable examples. (4 + 6 = 10) [ESIC JOKA] 12. Define bias. Explain the concept of confounding factor with a suitable example. Describe any three criteria for judging causal association of disease in epidemiology. (2 + 2 + 6 = 10) [ESIC JOKA]

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All 12 questions have been answered above. Here is a quick navigation guide to the answers:

Quick Reference Guide

QTopicKey Answer Points
Q1Fever with rash + IDSP + Outbreak investigationIDSP/EWARS surveillance; 8 steps of Park's outbreak investigation; control via ORI + Vitamin A
Q2AEFI classification + ManagementWHO 5-category causality classification; severity classification; 6 managerial functions
Q3National Immunization Schedule + Polio eradicationComplete infant schedule table (birth to 9 months); 6 polio eradication strategies
Q4Food poisoning outbreak in hostelCommon-source investigation; food-specific attack rates; incubation period to identify agent
Q5Measles in urban slum (Kolkata)Measles diagnosis; propagated epidemic curve; ORI + Vitamin A as control
Q6RR calculation (silica-silicosis cohort)RR = 6.0 (120/800 ÷ 30/1200); strong causal association
Q7Epidemic definition + types + investigationCommon-source vs propagated; 3 geographic types; applied investigation steps
Q8Hepatitis A after village fairDiagnosis + 2-4 week incubation; food-specific attack rates; Hep A vaccine for prevention
Q9Control/Elimination/Eradication + MR campaignPrecise WHO definitions; MR campaign's role in measles elimination and CRS control
Q10Drug comparison RCTDouble-blind RCT; CONSORT steps; 5 biases with controls
Q11Modes of transmissionDirect (droplet), Vehicle-borne (water/food), Biological vector (malaria in Anopheles)
Q12Bias + Confounding + Causal criteriaBradford Hill's criteria: Strength, Consistency, Temporality + confounding example (coffee-smoking-lung cancer)

Key marks reminders:
  • For Q6, the RR = 120/800 divided by 30/1200 = 0.15/0.025 = 6.0 - workers exposed to silica are 6x more likely to get silicosis.
  • For Q8, Hepatitis A is the answer (incubation 15-50 days matches the "two weeks after" fair exposure, and street food/water is the classic route).
  • For Q3, the 9-month dose is MR (not just measles) since India switched to MR vaccine.
  • All outbreak investigation questions follow the same 8-step Park's framework - verify diagnosis → confirm epidemic → define population → case finding → data analysis → hypothesis → ecological factors → report/control.
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