Last updated on July 10, 2026
Preparing for the Community Medicine viva examination is very different from preparing for theory papers. During viva voce, examiners expect quick, accurate, and concept-based answers rather than lengthy explanations. A single definition, cause, incubation period, or classification may decide your overall impression.
This comprehensive Community Medicine Viva Notes guide has been specially designed for BHMS students to help them revise the most important one-liners, definitions, public health concepts, communicable diseases, nutrition, epidemiology, family planning, environmental health, and National Health Programmes frequently asked during university viva examinations.
Before starting these viva notes, we recommend revising the 4th BHMS Community Medicine Syllabus to understand the chapter-wise examination pattern. These notes serve as a rapid revision companion and should be used after completing your theory preparation.
Whether you are preparing for university viva, practical examinations, or last-minute revision, this guide will help you revise the most frequently asked Community Medicine topics in a systematic manner
In This Guide
This rapid revision guide includes:
- Communicable Diseases
- Nutrition & Vitamin Deficiency Disorders
- Epidemiology
- Levels of Prevention
- Immunization
- Family Planning
- Water Purification
- National Health Programmes
- Health Indicators
- Environmental Health
- Public Health Concepts
- High-Yield Viva One-Liners
How to Use These Viva Notes
For the best results:
- Read the complete guide once.
- Revise section by section.
- Try answering every point without looking at the answer.
- Repeat the guide at least two or three times before your practical examination.
Consistent revision is the key to scoring well during Community Medicine viva examinations.
Communicable Diseases
Malaria
- Benign tertian malaria is caused by Plasmodium vivax.
- Malignant malaria is caused by Plasmodium falciparum.
- Quartan malaria is caused by Plasmodium malariae.
- Ovale malaria is caused by Plasmodium ovale.
- Benign tertian malaria produces fever every 48 hours.
- The incubation period of malaria usually ranges from 10–14 days, although it varies with the species involved.
- Humans act as the intermediate host, while the female Anopheles mosquito is the definitive host.
- Residual DDT spraying has historically been used in malaria control programmes.
- Common mosquito-borne diseases include Malaria, Dengue, and Filariasis.
Cholera
- Cholera is caused by Vibrio cholerae.
- The incubation period ranges from a few hours to 5 days, with most cases occurring within 1–2 days.
- Safe drinking water and sanitation remain the most effective preventive measures.
Plague
- Plague is caused by Yersinia pestis (formerly Pasteurella pestis).
- The disease is transmitted from rodents to humans by the rat flea.
- Bubonic plague usually spreads through flea bites.
- Pneumonic plague spreads directly from person to person through respiratory droplets.
Tuberculosis
- Tuberculosis is caused by Mycobacterium tuberculosis.
- The incubation period is generally 4–6 weeks.
- Tuberculosis is primarily transmitted through airborne droplets.
Diphtheria
- Diphtheria is caused by Corynebacterium diphtheriae.
- The incubation period is usually 2–5 days.
Leprosy
- Leprosy is caused by Mycobacterium leprae.
Poliomyelitis
Acute anterior poliomyelitis is caused by three serotypes of poliovirus:
- Type 1 – Brunhilde
- Type 2 – Lansing
- Type 3 – Leon
Rabies
- Rabies is a viral disease transmitted through the bite of infected animals.
Sexually Transmitted Diseases
Common sexually transmitted diseases include:
- Gonorrhoea
- Syphilis
Important facts:
- Gonorrhoea is caused by Neisseria gonorrhoeae.
- Syphilis is caused by Treponema pallidum.
Airborne Diseases
Common airborne diseases include:
- Tuberculosis
- Diphtheria
- Measles
- Mumps
- Chickenpox
Arthropod-Borne Diseases
Important arthropod-borne diseases include:
- Malaria
- Kala-azar
- Filariasis
- Dengue
Nutrition & Vitamin Deficiency Disorders
Community Medicine viva examinations frequently include questions related to nutritional deficiency diseases.
Vitamin A Deficiency
May produce:
- Night blindness
- Xerophthalmia
- Xerosis
- Increased susceptibility to respiratory infections
Early clinical sign:
- Night blindness
Vitamin B1 Deficiency
Produces:
- Beriberi
Vitamin C Deficiency
Produces:
- Scurvy
Vitamin D Deficiency
Produces:
- Rickets
Protein Deficiency
Protein deficiency commonly results in:
- Marasmus in children
- Protein-energy malnutrition
- Anaemia in adults
Epidemiology
Important Definitions
Endemic
The constant presence of a disease within a particular geographical area or population.
Epidemic
The occurrence of disease cases in excess of the normal expectation within a community or region over a specified period.
Carrier
An individual who harbours pathogenic organisms without showing symptoms but can transmit the disease to others.
Types of carriers:
- Incubatory carrier
- Convalescent carrier
- Healthy carrier
Incubation Period
The time interval between the entry of an infectious agent into the body and the appearance of the first signs and symptoms of disease.
Infection
The entry, establishment, and multiplication of microorganisms within the host.
Disinfection
The process of destroying pathogenic microorganisms on inanimate objects.
Epidemiological Triad
The three components are:
- Agent
- Host
- Environment
Understanding the interaction between these three factors forms the basis of disease prevention and control.
Levels of Prevention
Community Medicine classifies prevention into five levels:
| Level | Purpose |
|---|---|
| Health Promotion | Improve overall health |
| Specific Protection | Prevent specific diseases |
| Early Diagnosis & Treatment | Detect disease early |
| Disability Limitation | Reduce complications |
| Rehabilitation | Restore maximum function |
Family Planning
Family Planning is one of the most frequently asked topics during Community Medicine viva examinations. Students should be familiar with the permanent, temporary, natural, and barrier methods of contraception.
Permanent Methods
- Vasectomy
- Tubectomy (Salpingectomy)
Temporary Methods
- Oral Contraceptive Pills
- Condoms
- Copper-T (IUCD)
- Diaphragm
- Foam Tablets
- Spermicidal Jelly
- Cervical Cap
- Contraceptive Sponge
Natural Methods
- Safe Period Method
- Lactational Amenorrhea Method (LAM)
- Coitus Interruptus (Withdrawal Method)
- Periodic Abstinence
Water & Environmental Health
Methods of Water Purification
Safe drinking water is one of the cornerstones of preventive medicine.
Common methods of water purification include:
- Storage and Sedimentation
- Boiling
- Domestic Filtration
- Slow Sand Filtration
- Rapid Sand Filtration
- Chlorination
- Distillation
- Oxidation
- Chemical Precipitation
Soil-Borne Diseases
Examples include:
- Cholera
- Enteric Fever (Typhoid)
- Amoebic Dysentery
Air Pollution
Common health effects include:
- Chronic Bronchitis
- Primary Lung Cancer
Dust-Borne Diseases
Important examples include:
- Silicosis
- Anthracosis
- Asbestosis
- Byssinosis
- Bagassosis
- Siderosis
Milk-Borne Diseases
Common examples include:
- Tuberculosis
- Typhoid
- Cholera
Sanitary Latrine
A sanitary latrine should fulfill the following criteria:
- Prevent contamination of soil and water.
- Prevent access to flies, rodents, and animals.
- Prevent foul odour.
- Prevent environmental pollution.
National Health Programmes
Important National Health Programmes frequently asked during BHMS viva include:
- National Malaria Control / Eradication Programme
- National Leprosy Eradication Programme
- National Tuberculosis Control Programme
- National Filaria Control Programme
- National Family Welfare Programme
- National STD / HIV Control Programme
- National Water Supply & Sanitation Programme
Health Indicators & Public Health Concepts
Indicators of Health
Common health indicators include:
- Infant Mortality Rate (IMR)
- Maternal Mortality Ratio (MMR)
- Crude Death Rate
- Morbidity Rate
- Disability Rate
- Life Expectancy
- Proportional Mortality Rate
- Age and Sex Distribution
Determinants of Health
The major determinants of health are:
- Human Biology
- Environment
- Lifestyle
- Socioeconomic Status
- Health Services
Primary Health Care
Primary Health Care is the first level of contact between an individual and the healthcare system. It provides accessible, affordable, and essential healthcare services to the community.
Comprehensive Health Care
Comprehensive health care refers to the provision of integrated promotive, preventive, curative, rehabilitative, and palliative healthcare services throughout an individual’s life.
Basic Health Problems in India
The major public health problems include:
- Communicable Diseases
- Nutritional Disorders
- Environmental Sanitation
- Population Growth
- Medical Care
- Educational Problems
- Economic Problems
Rural Health Scheme (1977)
The Rural Health Scheme was based on the principle:
“Placing People’s Health in People’s Hands.”
Nutrition & School Health
Mid-Day Meal Programme
The Mid-Day Meal Programme provides nutritional support to school-going children with the objectives of:
- Improving nutritional status
- Increasing school attendance
- Reducing classroom hunger
- Improving learning capacity
Under-Five Clinic Services
The major components include:
- Growth Monitoring
- Immunization
- Nutritional Assessment
- Treatment of Illness
- Family Planning Advice
- Health Education
Anthropometric Measurements
The three most commonly used anthropometric measurements are:
- Height
- Weight
- Mid Upper Arm Circumference (MUAC)
- Skinfold Thickness
Occupational Health
Occupational Diseases
Common occupational diseases include:
- Silicosis
- Anthracosis
- Asbestosis
- Byssinosis
- Bagassosis
Occupational Cancers
Common sites include:
- Skin
- Lung
- Urinary Bladder
Important Public Health Definitions
Students should remember these important one-line definitions:
- Mortality Rate – Number of deaths in a population during a specified period.
- Census – Official counting of the population at regular intervals.
- Domiciliary Treatment – Treatment provided at the patient’s home.
- Insecticide – Chemical used to destroy insects.
- Carrier – An individual who harbours infection without showing symptoms.
- Vital Events – Birth, Death, Marriage, Divorce and Fetal Death.
- Standardized Death Rate – Used to compare the health status of different populations.
Frequently Asked Viva One-Liners
These questions are repeatedly asked during Community Medicine viva examinations.
- What is Endemic disease?
- What is Epidemic disease?
- What is Pandemic disease?
- Define Carrier.
- What is Incubation Period?
- What is Infection?
- What is Disinfection?
- What is Primary Health Care?
- What are the Levels of Prevention?
- What is Epidemiological Triad?
- What is IMR?
- What is MMR?
- What is ORS?
- What are the Determinants of Health?
- What are the Indicators of Health?
- Name the National Health Programmes.
- Name four Vitamin Deficiency Diseases.
- Name three Arthropod-Borne Diseases.
- Name three Air-Borne Diseases.
- Name three Occupational Diseases.
Last-Minute Viva Checklist
Before appearing for your viva examination, make sure you can confidently explain:
✓ Levels of Prevention
✓ Epidemiological Triad
✓ Endemic, Epidemic & Pandemic
✓ Indicators of Health
✓ Determinants of Health
✓ Primary Health Care
✓ Family Planning Methods
✓ National Health Programmes
✓ Vitamin Deficiency Diseases
✓ Water Purification Methods
✓ ORS Composition
✓ Immunization
✓ Occupational Diseases
✓ Air Pollution
✓ Environmental Sanitation
Conclusion
Community Medicine is one of the most scoring subjects in the BHMS curriculum when revised systematically. Instead of memorizing isolated facts, focus on understanding concepts, learning important definitions, and revising frequently asked viva questions repeatedly.
Use these Community Medicine Viva Notes as your rapid revision guide before university practical examinations and viva voce. Regular revision, concept clarity, and confident presentation will help you perform better during examinations.
For complete preparation, also explore the 4th BHMS Community Medicine Syllabus, theory notes, and other BHMS subject-wise resources available on MedicoSage.
Hope that you find this post helpful for your upcoming examinations.
You may also find useful content of other subjects of 4th B.H.M.S. by following the below mentioned links,