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University Exam Answer: Nutrition - SPM

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EXAM PRESENTATION TIPS (Read First)

How to present this in exams:

• Start each section with a clean heading (underline it)
• Use flowcharts for causes/pathogenesis - examiners love diagrams
• Use bullet points for lists, NOT long paragraphs
• Box important definitions
• Write classification tables neatly
• Attempt all 4 parts; allocate marks accordingly (typically a=5, b=5, c=15, d=5)

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a) NUTRITIONAL DEFICIENCY DISORDERS IN INDIA

Major Nutritional Deficiency Disorders in India

NUTRITIONAL DEFICIENCY DISORDERS IN INDIA
│
├── 1. PROTEIN-ENERGY MALNUTRITION (PEM)
│       ├── Kwashiorkor (protein deficiency)
│       ├── Marasmus (calorie deficiency)
│       └── Marasmic Kwashiorkor (combined)
│
├── 2. MICRONUTRIENT DEFICIENCY DISORDERS
│       ├── Iron Deficiency Anaemia (most common)
│       ├── Iodine Deficiency Disorders (IDD) → Goitre, Cretinism
│       ├── Vitamin A Deficiency → Xerophthalmia, Night blindness
│       ├── Vitamin D Deficiency → Rickets (children), Osteomalacia (adults)
│       ├── Folate / B12 Deficiency → Megaloblastic Anaemia
│       └── Zinc / Calcium deficiency
│
├── 3. FOOD-BORNE TOXIC DISORDERS
│       └── Lathyrism (Lathyrus sativus - Khesari dhal)
│
├── 4. FLUOROSIS
│       └── Dental and Skeletal fluorosis (endemic in India)
│
└── 5. OBESITY AND OVERNUTRITION
        └── Emerging dual burden in urban India

Key Facts for Each:

• 18.5% children born with low birth weight
• 35.7% children underweight (weight-for-age <5 years)
• 38.4% children stunted
• 21% children wasted
• About 33% adult men and 36% adult women have BMI below 18.5 (chronic energy deficiency)
• In tribal adults: 40% men and 49% women are below BMI 18.5

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b) BALANCED DIET

Definition (Park's - Standard for exams)

"A balanced diet is defined as one which contains a variety of foods in such quantities and proportions that the need for energy, amino acids, vitamins, minerals, fats, carbohydrate and other nutrients is adequately met for maintaining health, vitality and general well-being, and also makes a small provision for extra nutrients to withstand short duration of leanness."

• Park's Textbook of Preventive and Social Medicine

Principles of Constructing a Balanced Diet

BALANCED DIET - CONSTRUCTION PRINCIPLES
┌─────────────────────────────────────────────────────────┐
│  1. PROTEIN: 10-15% of daily energy intake              │
│  2. FAT: Limited to 15-30% of daily energy intake       │
│  3. CARBOHYDRATES: Remainder (rich in natural fibre)    │
│  4. MICRONUTRIENTS: As per RDA (Table below)            │
│  5. SALT: <5 g/day (India average is 15 g/day)          │
│  6. NO junk food/empty calories                         │
│  7. FATS + ALCOHOL: Restricted                          │
└─────────────────────────────────────────────────────────┘

RDA for Indians - 2020 (Key Values)

Food Guide Pyramid (Diagram)

                    ▲
                   /  \
                  / Fats\    ← Use sparingly
                 /  & oils\
                ┼──────────┼
               /  Dairy &  \   ← 2-3 servings
              /   Proteins   \
             ┼────────────────┼
            /   Fruits &      \  ← 2-4 servings
           /    Vegetables      \
          ┼──────────────────────┼
         /   Cereals, grains,    \  ← 6-11 servings (base)
        /    bread, rice          \
       ┼────────────────────────────┼

Special considerations:

• Diet must be adapted for: growth, pregnancy, lactation, physical activity, medical disorders (e.g. diabetes)
• Variety of foods ensures no single nutrient deficiency

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c) NUTRITIONAL ANAEMIA - DETAILED ACCOUNT

Definition

WHO Definition: "A condition in which the haemoglobin content of blood is lower than normal as a result of a deficiency of one or more essential nutrients, regardless of the cause of such deficiency." (Park's Textbook of Preventive and Social Medicine)

WHO Cut-off Points for Anaemia (Haemoglobin levels)

Classification by Severity

Causes of Nutritional Anaemia

CAUSES OF NUTRITIONAL ANAEMIA
│
├── DIETARY CAUSES
│     ├── Inadequate iron intake (most common)
│     ├── Poor bioavailability of dietary iron (<5% absorbed)
│     ├── Folate deficiency → Megaloblastic anaemia
│     └── Vitamin B12 deficiency → Megaloblastic anaemia
│
├── INCREASED REQUIREMENTS
│     ├── Pregnancy
│     ├── Lactation
│     └── Rapid growth (infancy, adolescence)
│
├── INCREASED LOSSES
│     ├── Menstruation (women)
│     ├── Bleeding (GI losses, hookworm)
│     └── Multiple/close-interval pregnancies
│
└── INFECTIONS / PARASITES
      ├── Malaria (haemolysis)
      └── Hookworm infestation (blood loss)

Epidemiology

• Iron deficiency anaemia is the most widespread micronutrient deficiency in India
• Affects ALL age groups irrespective of gender, caste, creed, religion
• 72.7% of children up to age 3 in urban areas are anaemic
• 81.2% of children up to age 3 in rural areas are anaemic
• Prevalence in adolescent girls: 72.6% (DLHS 2002-04)
• Severe anaemia among adolescent girls: 21.1%
• Overall prevalence in children: increased from 74.2% (1998-99) to 79.2% (2005-06)
• Bihar: highest prevalence (87.6%); Nagaland: lowest (44.3%)
• 19% of maternal deaths in India due to anaemia

Types of Nutritional Anaemia

NUTRITIONAL ANAEMIA
        │
        ├── MICROCYTIC HYPOCHROMIC ANAEMIA
        │         └── Iron Deficiency (most common)
        │
        └── MACROCYTIC / MEGALOBLASTIC ANAEMIA
                  ├── Folate deficiency
                  └── Vitamin B12 deficiency

Detrimental Effects of Anaemia

(a) Pregnancy

• Increases risk of maternal and foetal mortality and morbidity
• Associated with: abortions, premature births, postpartum haemorrhage, low birth weight
• 19% of maternal deaths in India due to anaemia

(b) Infection

• Caused/aggravated by parasitic diseases (malaria, intestinal parasites)
• Iron deficiency impairs cellular immune responses
• Increases susceptibility to infection
• Vicious cycle: Anaemia → infection → worsens anaemia

(c) Work Capacity

• Even mild anaemia causes significant impairment of maximal work capacity
• Severity of anaemia correlates with reduction in work performance
• Impacts economic productivity of the nation

VICIOUS CYCLE OF ANAEMIA AND INFECTION

    Anaemia ──────────────► Impaired immunity
       ▲                           │
       │                           ▼
       └────────── Infection ◄─────┘
                 (malaria, hookworm)

Interventions for Nutritional Anaemia

(1) Iron and Folic Acid Supplementation

• Hb 10-12 g/dl: Daily iron and folic acid supplementation
• Hb <10 g/dl: Refer to nearest PHC

(2) Iron Fortification

• National Institute of Nutrition (Hyderabad) developed iron-fortified salt
• Ferric orthophosphate or ferrous sulphate + sodium bisulphate added to salt
• When consumed over 12-18 months: significant reduction in anaemia prevalence
• Commercial production started: 1985
• Advantages: Universal consumption; no special delivery system needed

(3) Dietary Modification

• Encourage iron-rich foods (green leafy vegetables, meat, jaggery, fortified cereals)
• Vitamin C-rich foods increase iron absorption
• Reduce tea/coffee with meals (tannins reduce iron absorption)

(4) Deworming

• Albendazole / Mebendazole for hookworm
• Reduces iron loss from parasitic infestation

(5) Control of Malaria

• Malaria control reduces haemolytic anaemia

MANAGEMENT FLOWCHART - NUTRITIONAL ANAEMIA

        Suspect Anaemia
              │
              ▼
    Estimate Haemoglobin (Hb)
              │
     ┌────────┴────────┐
     │                 │
  Hb ≥ 10 g/dl      Hb < 10 g/dl
     │                 │
     ▼                 ▼
IFA supplementation   Refer to PHC/
+ Dietary advice     Blood transfusion
+ Deworming          if severe (<7)
     │
     ▼
Re-check Hb at 3-4 months
     │
     ▼
Continue until 2-3 months
after Hb returns to normal

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d) ANAEMIA MUKT BHARAT (AMB)

Introduction

The "6x6x6" Target

• 6 beneficiary groups to be covered
• 6 interventions to be implemented
• 6 institutional mechanisms for delivery

6 Beneficiary Groups

1. Children 6-59 months
2. Children 5-9 years (school-going)
3. Adolescent girls and boys (10-19 years)
4. Pregnant women
5. Lactating women
6. Women of reproductive age (15-49 years)

6 Key Interventions

┌──────────────────────────────────────────────────────────┐
│           6 INTERVENTIONS OF ANAEMIA MUKT BHARAT         │
├──────────────────────────────────────────────────────────┤
│ 1. Prophylactic Iron and Folic Acid (IFA) supplementation│
│                                                          │
│ 2. Deworming                                             │
│                                                          │
│ 3. Intensified year-round Behaviour Change               │
│    Communication (BCC) - "Solid Body, Smart Mind"        │
│    4 Key behaviours:                                     │
│    (a) Compliance to IFA + deworming                     │
│    (b) Appropriate infant & young child feeding          │
│    (c) Iron-rich diet diversity/frequency/fortified food │
│    (d) Delayed cord clamping (≥3 min after delivery)     │
│                                                          │
│ 4. Testing & treatment of anaemia using DIGITAL methods  │
│    and point-of-care treatment                           │
│    (Focus: pregnant women + school-going adolescents)    │
│                                                          │
│ 5. Mandatory IFA-fortified foods in government-funded    │
│    public health programmes                              │
│                                                          │
│ 6. Intensifying awareness, screening & treatment of      │
│    NON-NUTRITIONAL causes:                               │
│    → Malaria (endemic pockets)                           │
│    → Haemoglobinopathies (sickle cell, thalassaemia)     │
│    → Fluorosis                                           │
└──────────────────────────────────────────────────────────┘

6 Institutional Mechanisms (Delivery Platforms)

• National Iron Plus Initiative (NIPI)
• Weekly Iron Folic Acid Supplementation (WIFS) Programme
• Antenatal care (ANC) platforms
• ICDS (Anganwadi)
• Schools (Mid-Day Meal)
• Health and Wellness Centres

Implementation

• Implemented through existing delivery platforms - NIPI and WIFS
• Implemented in all villages, blocks, and districts of all States/UTs
• Digital hemoglobinometer for point-of-care testing

AMB Targets (Intensified)

• Reduce anaemia prevalence by 3 percentage points per year among all age groups
• From 2018-19 to 2022 (as part of POSHAN Abhiyaan)

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QUICK SUMMARY TABLE FOR EXAM REVISION

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EXAM WRITING STRATEGY

• (a) Enumerate - List format is fine. Use a table or classification tree (5 mins)
• (b) Define - 2-3 sentences definition + one principle table (3 mins)
• (c) Write in detail - Definition → epidemiology → types → causes → effects → interventions + flowcharts (15-18 mins)
• (d) Note on AMB - Intro + 6 interventions in box format + implementation (5 mins)

1. Causes of nutritional anaemia (branching tree)
2. Vicious cycle of anaemia and infection (circle/loop)
3. Management flowchart based on Hb levels
4. 6 interventions of AMB in a box/table

• WHO definition of nutritional anaemia (word-for-word)
• Iron absorption is <5% from diet
• 19% maternal deaths in India due to anaemia
• IFA dosage details (100 mg elemental iron for mothers)
• The 6 interventions of Anaemia Mukt Bharat
• "Solid Body, Smart Mind" campaign name