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📚 Chapter & Page Reference

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PROGRAMME EVALUATION AND REVIEW TECHNIQUE (PERT)

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🔷 DEFINITION

PERT (Programme Evaluation and Review Technique) is a management technique which makes possible more detailed planning and more comprehensive supervision of a project.

• (Park's Textbook of Preventive & Social Medicine, 28th Ed., p. 976)

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🔷 INTRODUCTION / CONCEPT

"Every housewife who plans a meal so that each part of the menu is completed at the same time is using the basic technique of PERT." - K. Park

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🔷 ESSENCE / WORKING PRINCIPLE

• Represents the logical sequence in which events must take place
• Allows calculation of the time by which each activity must be completed
• Helps identify critical activities that could delay the project

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🔷 ARROW DIAGRAM (PERT Network) - from K. Park, p. 977

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🔷 COMPONENTS OF PERT

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🔷 USES / APPLICATIONS OF PERT

1. Planning, scheduling and monitoring the project
2. Allows better communication between various levels of management
3. Identifies potential problems before they arise
4. Furnishes continuous, timely progress reports
5. Forms a solid foundation for building an evaluation and checking system
6. Can be applied to a great variety of projects in health programmes

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🔷 FLOWCHART: HOW PERT WORKS

DEFINE PROJECT GOAL
        ↓
LIST ALL ACTIVITIES/EVENTS
        ↓
ARRANGE IN LOGICAL SEQUENCE
        ↓
CONSTRUCT ARROW DIAGRAM (Network)
        ↓
ESTIMATE TIME FOR EACH ACTIVITY
        ↓
IDENTIFY CRITICAL PATH (longest path)
        ↓
MONITOR PROGRESS & CONTROL DELAYS
        ↓
PROJECT COMPLETION (Terminal Event)

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🔷 CRITICAL PATH METHOD (CPM) - Related Concept

"The longest path of the network is called the 'critical path'. If any activity along the critical path is delayed, the entire project will be delayed." - K. Park, p. 977

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🔷 IMPORTANCE IN COMMUNITY MEDICINE / HEALTH PROGRAMMES

• Used in National Health Programme planning and implementation
• Helps District Health Officers manage multiple concurrent activities
• Ensures efficient resource utilization (manpower, materials, money, time)
• Minimizes delays and crises in implementation of health plans
• Supports evaluation of programme progress against timeline

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🔷 SUMMARY BOX (For Quick Recall)

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Examiner's Note: This answer covers the definition, principle, components, uses, arrow diagram, CPM comparison, and community medicine application - all directly from K. Park 28th Edition, pp. 976-977, under the chapter on Health Management and Administration, Section 7: Network Analysis.

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📚 Chapter & Page Reference - K. Park 28th Edition

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PUBLIC HEALTH EMERGENCY OF INTERNATIONAL CONCERN (PHEIC)

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🔷 DEFINITION

PHEIC is defined as "an extraordinary event which is determined to constitute a public health risk to other States through the international spread of disease and to potentially require a coordinated international response." (International Health Regulations [IHR], 2005 - as cited in K. Park's Textbook of Preventive and Social Medicine, 28th Ed.)

• Serious, sudden, unusual, or unexpected
• Carry implications for public health beyond the affected State's national border
• Possibly require immediate international action

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🔷 LEGAL BASIS

IHR (2005) was developed following the SARS outbreak of 2002-2003 to prevent and control global health threats while keeping international travel and trade as open as possible. (K. Park, 28th Ed. - International Health Regulations)

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🔷 CRITERIA FOR DECLARING PHEIC

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🔷 DISEASES ALWAYS NOTIFIABLE UNDER IHR (2005)

• Smallpox
• Poliomyelitis (wild-type)
• Human influenza caused by a new subtype
• SARS (Severe Acute Respiratory Syndrome)

• Cholera, Pneumonic plague, Yellow fever, Viral haemorrhagic fevers (Ebola, Lassa, Marburg)
• West Nile fever, Meningococcal disease, and any other event of potential international concern

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🔷 FLOWCHART: PHEIC DECLARATION PROCESS

UNUSUAL DISEASE EVENT DETECTED
(in any WHO Member State)
            ↓
NATIONAL HEALTH AUTHORITY NOTIFIES WHO
(within 24 hours)
            ↓
WHO DIRECTOR-GENERAL CONVENES
IHR EMERGENCY COMMITTEE
            ↓
EMERGENCY COMMITTEE EVALUATES
(using 4 PHEIC criteria decision instrument)
            ↓
         ┌──────────────────────────────────┐
    2 or more criteria met?
         └──────────────────────────────────┘
         ↓ YES                        ↓ NO
PHEIC DECLARED                   Situation monitored;
by WHO DG                        PHEIC not declared
         ↓
TEMPORARY RECOMMENDATIONS ISSUED
(travel, trade, surveillance, response)
         ↓
MEMBER STATES IMPLEMENT MEASURES
(legal obligation under IHR 2005)
         ↓
PHEIC REVIEWED every 3 months
         ↓
PHEIC TERMINATED when criteria no longer met

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🔷 LIST OF DECLARED PHEICs (Important for Exams)

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🔷 ROLE OF WHO UNDER IHR (2005) - As Given in K. Park

1. Collects and disseminates epidemiological information on diseases subject to IHR
2. Issues Temporary Recommendations - specific health measures for persons, baggage, cargo, conveyances at international ports
3. Provides technical guidance to affected Member States
4. Coordinates international response through GOARN (Global Outbreak Alert and Response Network)
5. Reviews and terminates PHEIC declaration based on evolving situation

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🔷 SIGNIFICANCE / IMPORTANCE

• Highest level of alert WHO can raise for a public health threat
• Triggers rapid international mobilization of resources, expertise and funds
• Ensures transparent information sharing among nations
• Prevents unnecessary restrictions on international travel and trade
• Protects global health security through coordinated response
• Enables affected countries to receive technical and financial support

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🔷 SUMMARY BOX (For Quick Recall)

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Examiner's Tip: This answer demonstrates knowledge of the definition, legal basis (IHR 2005), declaration criteria, procedure, examples of PHEICs, WHO's role, and significance - covering all dimensions a 5-mark answer requires. The content is directly sourced from K. Park's 28th Edition framework on International Health Regulations and WHO functions.

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📚 BATCH 1 — TOPICS 1 to 10

K. Park's Textbook of Preventive and Social Medicine, 28th Edition

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1. BYSSINOSIS

Definition: Byssinosis is an occupational lung disease caused by inhalation of cotton fibre dust over long periods of time.

• Also called "Monday fever" or "brown lung disease"
• Caused by: Organic vegetable dust (cotton dust) - classified under Pneumoconiosis
• Symptoms: Chronic cough, progressive dyspnoea → chronic bronchitis → emphysema
• India has a large textile industry employing ~35% of factory workers
• Incidence in India: 7-8% (surveys in Mumbai, Ahmedabad, Delhi)

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2. GANTT CHART

Definition: A Gantt Chart is a horizontal bar chart used as a management tool to display the time schedule of activities in a project, showing when each activity starts and ends.

• Developed by Henry L. Gantt (1917)
• It is a planning and scheduling tool
• Activities are listed on the Y-axis; time is shown on the X-axis
• Each activity is represented by a horizontal bar - length = duration of activity
• Allows easy visual monitoring of project progress at a glance

LIST ALL ACTIVITIES of the project
           ↓
ESTIMATE TIME required for each activity
           ↓
DRAW HORIZONTAL BARS on a time scale
(Activities on Y-axis, Time on X-axis)
           ↓
MONITOR actual progress vs planned
           ↓
IDENTIFY DELAYS and take corrective action

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3. FOOD PYRAMID

Definition: The Food Guide Pyramid is a nutritional education guide that represents the recommended daily servings from each food group in a pyramid shape - with foods to eat most at the base and those to eat least at the top.

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4. SOCIAL SECURITY SCHEMES

Definition: Social security is defined as "security that society furnishes through appropriate organization, against certain risks to which its members are exposed." (K. Park, 28th Ed.)

• Social insurance - contributory schemes (e.g., ESI)
• Social assistance - non-contributory, government-funded for the poor

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5. BENEFITS OF BREASTFEEDING TO MOTHERS

Breastfeeding provides benefits not only to the infant but also to the mother in multiple ways.

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6. ULTRA-PROCESSED FOODS

Ultra-processed foods are highly processed, energy-dense, micronutrient-poor foods and drinks that undergo multiple industrial processing steps with added sugars, fats, salt, and artificial additives.

• Examples: packaged snacks, instant noodles, carbonated drinks, fast food, packaged biscuits, ready-to-eat meals
• NOVA Classification (Group 4) - highest level of food processing
• Health Consequences:
  • Obesity and overweight
  • Type 2 diabetes mellitus
  • Cardiovascular diseases
  • Diet-related chronic diseases (NCDs)
  • Can cause hidden hunger (micronutrient deficiency despite high calorie intake)
• K. Park notes: Developing countries are moving from traditional diets to highly processed, energy-dense, micronutrient-poor foods - contributing to the "triple burden of malnutrition" (undernutrition + micronutrient deficiency + obesity)

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7. CHILD SURVIVAL INDEX

Definition: Child Survival Index (or Child Survival Rate) is a measure of the proportion of children who survive to age 5 years per 1000 live births.

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8. ESTIMATED AVERAGE REQUIREMENT (EAR)

Definition: EAR is "the average daily nutrient intake level estimated to meet the requirement of half (50%) of the healthy individuals in a particular life stage and gender group." (K. Park, 28th Ed.)

• EAR is the basis on which RDA is calculated
• RDA = EAR + 2 Standard Deviations (accounts for individual variability)
• EAR is used for assessing adequacy of nutrient intakes in population groups
• NOT recommended for use as a standard for individuals

EAR (50% coverage) → + 2 SD → RDA (97.5% coverage)

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9. HIDDEN HUNGER

Definition: Hidden hunger (micronutrient deficiency) is "a form of undernutrition that occurs when intake and absorption of vitamins and minerals (such as zinc, iodine, and iron) are too low to sustain good health and development." (K. Park, 28th Ed.)

• Affects >2 billion individuals (1 in 3 people) globally (FAO, 2013)
• Visible signs appear only in severe deficiency (e.g., night blindness = Vit A deficiency; goitre = iodine deficiency)

• Mental impairment, poor health, low productivity
• Particularly devastating in the first 1000 days of life (conception to age 2)
• Cognitive and physical developmental consequences
• Contributes to triple burden of malnutrition:

TRIPLE BURDEN OF MALNUTRITION
┌─────────────────────────────────────┐
│ 1. Undernutrition (stunting/wasting)│
│ 2. Hidden Hunger (micronutrient ↓) │
│ 3. Overnutrition/Obesity            │
└─────────────────────────────────────┘

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10. ANTENATAL VISITS SCHEDULE

Antenatal care involves the systematic supervision of pregnant women to monitor fetal and maternal well-being and detect complications early.

• Once a month during 1st-7 months
• Twice a month during 8th month
• Once a week from 9th month till delivery

EARLY PREGNANCY DETECTION (< 12 weeks)
           ↓
1st ANC Visit → Registration + Baseline investigations
           ↓
2nd Visit (14-26 wks) → Screening + TT injection
           ↓
3rd Visit (28-34 wks) → MO check-up + Referral if needed
           ↓
4th Visit (36 wks-term) → Birth preparedness
           ↓
SAFE DELIVERY

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📚 BATCH 1 — TOPICS 1 TO 10

K. Park's Textbook of Preventive and Social Medicine, 28th Edition

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1. EMPORIATRICS

Definition: "Emporiatrics is the term coined to describe the science of the health of travellers." (K. Park, 28th Ed.)

• In the jet age, international travellers face special and unique health risks
• Risks arise from: crowding, long hours of waiting, disruption of eating habits, change in climate and time zone
• These factors cause: nausea, indigestion, extreme fatigue, insomnia

1. Immunizations before travel (Yellow fever, Hepatitis A, Typhoid, Meningococcus)
2. Chemoprophylaxis for malaria (start on day of arrival, continue 4-6 weeks after leaving)
3. Avoid unpasteurized milk, uncooked food, non-bottled drinks ("Boil it, Cook it, Peel it, or Forget it")
4. Use insect repellents and protective clothing against vector bites
5. Carry ORS for traveller's diarrhoea

Travellers have a personal responsibility to recognize these risks, which can be minimized by immunization and chemoprophylaxis.

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2. PRENATAL GENETIC SCREENING

Definition: Prenatal genetic screening is "screening for chromosomal abnormalities associated with serious birth defects, screening for direct evidence of congenital structural anomalies, and screening for haemoglobinopathies and other inherited conditions detectable by biochemical assay." (K. Park, 28th Ed.)

• Women aged ≥35 years
• Those who already have an afflicted child
• Family history of genetic disorders

MATERNAL SERUM SCREENING (Triple/Quad test)
         ↓
ULTRASOUND (NT scan at 11-14 weeks, anomaly scan at 18-20 weeks)
         ↓
INVASIVE TESTING if positive screen:
  - Chorionic Villus Sampling (CVS) - 10-12 weeks
  - Amniocentesis - 15-18 weeks
         ↓
GENETIC COUNSELLING + Decision making
         ↓
Option of THERAPEUTIC ABORTION if severe defect detected

Note: Universal genetic screening is generally NOT recommended - only for high-risk groups.

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3. BYSSINOSIS

Definition: Byssinosis is an occupational lung disease caused by inhalation of cotton fibre dust over long periods of time.

• Also called "Monday Fever" or "Brown Lung Disease"
• Causative agent: Organic vegetable dust (cotton dust)
• Classified under Pneumoconiosis (occupational lung diseases)
• Symptoms: Chronic cough → progressive dyspnoea → chronic bronchitis → emphysema
• India: Large textile industry employing ~35% of factory workers
• Incidence in India: 7-8% (surveys in Mumbai, Ahmedabad, Delhi)

1. Dust control - exhaust ventilation, wet process, enclosed apparatus
2. Personal protection - masks/respirators with mechanical filters
3. Medical control - pre-employment + periodic medical check-ups
4. Substitution - replacing cotton with synthetic fibres where possible

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4. GANTT CHART

Definition: A Gantt Chart is a horizontal bar chart used as a management and scheduling tool that visually displays the time schedule of project activities - showing when each activity begins and ends.

• Developed by Henry L. Gantt (1917)
• A planning, scheduling and monitoring tool in project management
• Activities on Y-axis; Time (days/weeks/months) on X-axis
• Each bar's length = duration of that activity

ACTIVITY          | Jan | Feb | Mar | Apr |
------------------+-----+-----+-----+-----+
1. Planning       |████ |     |     |     |
2. Procurement    |████ |████ |     |     |
3. Training       |     |████ |████ |     |
4. Implementation |     |     |████ |████ |
5. Evaluation     |     |     |     |████ |

• Simple to construct and easy to understand
• Good for routine monitoring of project progress
• Shows planned vs. actual progress

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5. FOOD PYRAMID

Definition: The Food Guide Pyramid is a nutritional education guide that emphasizes foods from five major food groups arranged in a pyramid to represent recommended daily servings.

• Foods at the base = eat most; foods at the apex = eat least
• No single food group provides all nutrients - a variety is essential
• Foods in one group cannot replace those in another

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6. SOCIAL SECURITY SCHEMES

Definition: Social security is defined as "security that society furnishes through appropriate organization, against certain risks to which its members are exposed." (K. Park, 28th Ed.)

• Social Insurance - Contributory (worker + employer contribute)
• Social Assistance - Non-contributory (government-funded for the poor)

ESI Act 1948 is the most comprehensive social security legislation for industrial workers in India - it covers medical benefit, sickness benefit, maternity benefit, disablement benefit, and dependants' benefit.

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7. BENEFITS OF BREASTFEEDING TO MOTHERS

WHO recommends exclusive breastfeeding for first 6 months of life, followed by continued breastfeeding up to 2 years or beyond with appropriate complementary foods.

LAM is effective as contraception only when: infant is < 6 months old + mother is fully breastfeeding + amenorrhoea is present - effectiveness is 98%.

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8. ULTRA-PROCESSED FOODS

Definition: Ultra-processed foods are industrially manufactured food products that are energy-dense, nutrient-poor and contain multiple additives (sugar, salt, fat, artificial flavours, preservatives) not normally used in home cooking.

• Obesity and overweight
• Type 2 Diabetes Mellitus
• Cardiovascular diseases (HTN, dyslipidaemia)
• Hidden hunger (high calories but micronutrient-poor)
• Cancer (colorectal)

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9. CHILD SURVIVAL INDEX

Definition: Child Survival Index (Child Survival Rate) measures the proportion of children who survive to age 5 years per 1000 live births.

Child Survival Rate = (1000 − Under-5 Mortality Rate) ÷ 10 (expressed as % of children surviving to age 5)

Breastfeeding → Adequate nutrition → Clean water
       ↓               ↓                ↓
Immunization → ORT for diarrhoea → Birth spacing
       ↓
IMPROVED CHILD SURVIVAL RATE

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10. ESTIMATED AVERAGE REQUIREMENT (EAR)

Definition: EAR is "the average daily nutrient intake level estimated to meet the requirement of half (50%) of the healthy individuals in a particular life stage and gender group." (K. Park, 28th Ed.)

EAR (meets 50% of population)
      ↓ + 2 Standard Deviations (individual variability)
RDA (meets 97.5% of population)

• EAR is the scientific basis from which RDA is calculated
• RDA = EAR + 25% allowance (for individual variability and nutrient bioavailability)
• EAR is used for population-level assessment, NOT for individuals
• Bioavailability must be considered (e.g., iron requires 20-30x more in diet due to low bioavailability)

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