Communicable diseases list: types, symptoms and causes

Communicable diseases list: types, symptoms and causes

Learn about the communicable diseases list, including common types, symptoms, causes, and how these infections spread.

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In summary


Communicable diseases are infections that can spread through contact, respiratory droplets, contaminated food or water, and vectors such as mosquitoes. Their causes, symptoms, and severity vary depending on the type of infection.


Key takeaways


  • Communicable diseases can spread between people or through contaminated sources.
  • Common examples include influenza, tuberculosis, dengue, malaria, and COVID-19.
  • Symptoms vary depending on the type and cause of infection.
  • Transmission may occur through air, direct contact, food, water, blood, or insect bites.
  • Hygiene, vaccination, and other preventive measures can help reduce the spread of infections.

Communicable diseases can cause symptoms that require medical consultations, diagnostic tests, medicines, or hospitalisation. Check now to explore health insurance plans that suits your healthcare needs.

What causes communicable diseases?

Communicable diseases are caused by infectious agents such as viruses, bacteria, fungi, and parasites that enter the body and multiply. They can spread through respiratory droplets, bodily fluids, contaminated food or surfaces, insect bites, or sexual contact. Poor sanitation, overcrowding, limited access to healthcare, and frequent travel can also increase the risk of transmission.

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Communicable diseases list: Common examples by type

Communicable diseases can be grouped by how they spread. The table below lists common examples, their transmission routes, and whether they are commonly reported in India.

DiseaseTypeHow it spreadsCommon in India?
InfluenzaRespiratoryRespiratory droplets and close contactYes
COVID-19RespiratoryRespiratory particles and close contactYes
TuberculosisRespiratoryInhaling infectious airborne particlesYes
MeaslesRespiratoryAirborne particles and respiratory dropletsYes
Whooping coughRespiratoryRespiratory droplets from an infected personYes
TyphoidFood- and water-borneContaminated food or waterYes
Hepatitis AFood- and water-borneContaminated food or waterYes
CholeraFood- and water-borneContaminated food or waterYes
AmoebiasisFood- and water-borneContaminated food or waterYes
GiardiasisFood- and water-borneContaminated food or waterYes
DengueVector-borneBites from infected Aedes mosquitoesYes
MalariaVector-borneBites from infected Anopheles mosquitoesYes
ChikungunyaVector-borneBites from infected Aedes mosquitoesYes
Japanese encephalitisVector-borneBites from infected mosquitoesYes
HIV infectionBlood- and sexually transmittedInfected blood and certain body fluids, including through sexual contactYes
Hepatitis BBlood- and sexually transmittedInfected blood and certain body fluidsYes
SyphilisSexually transmittedSexual contact with an infected personYes
RingwormContact- and skin-borneDirect contact or contaminated personal items and surfacesYes
ScabiesContact- and skin-borneProlonged skin-to-skin contact or shared personal itemsYes
RabiesAnimal-borneBites or scratches from an infected animalYes

Transmission routes can vary for some diseases, and several infections can spread through more than one route.

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What are the symptoms of communicable diseases?

The symptoms of communicable diseases vary depending on the infection and the part of the body affected. Common symptoms include:

  • Fever and chills
  • Cough and sore throat
  • Fatigue and weakness
  • Headache
  • Muscle or body aches
  • Nausea and vomiting
  • Diarrhoea or abdominal discomfort
  • Skin rashes
  • Swollen lymph nodes
  • Difficulty breathing

Symptoms can range from mild to severe. Some infections can cause complications, particularly in young children, older adults, and people with weakened immune systems.

How can you prevent communicable diseases?

You can reduce the spread of communicable diseases by following good hygiene practices, staying up to date with recommended vaccinations, and taking appropriate infection-control measures.


  • Wash your hands: Clean your hands regularly with soap and water or use an alcohol-based hand sanitiser when soap and water are unavailable.
  • Cover coughs and sneezes: Use a tissue or your elbow when coughing or sneezing, and dispose of used tissues properly.
  • Stay up to date with vaccinations: Follow recommended vaccination schedules to protect against vaccine-preventable infections.
  • Avoid close contact when ill: Limit close contact with others when you have symptoms of a contagious infection.
  • Practise safe food and water habits: Consume safe drinking water and handle, prepare, and store food hygienically.
  • Maintain clean surroundings: Clean frequently touched surfaces and maintain good sanitation to reduce the risk of infection.
  • Follow infection-control measures: Follow appropriate precautions in healthcare facilities, schools, workplaces, and other shared settings when infections are circulating.

How are communicable diseases treated?

Treatment for communicable diseases depends on the type of infection, the infectious agent, and the severity of symptoms. Treatment may include:


  • Antimicrobial medicines: Antibiotics, antivirals, antifungals, or antiparasitic medicines may be prescribed for specific infections.
  • Supportive care: Rest, adequate fluids, pain or fever relief, and respiratory support may be used to manage symptoms and complications.
  • Infection-control measures: Isolation or other precautions may be advised for certain infections to reduce the risk of transmission.

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Does health insurance cover communicable diseases?

Health insurance can help manage medical expenses associated with communicable diseases, depending on the policy’s terms and conditions. Coverage may include eligible costs for consultations, diagnostic tests, medicines, hospitalisation, and other medically necessary treatment.

When planning for unexpected healthcare expenses, understanding how insurance can support treatment costs can help you make an informed choice. Review the policy terms carefully to understand the coverage available for communicable disease-related treatment and hospitalisation.

Conclusion

Communicable diseases remain a public health concern and can affect individuals, families, and communities. Early detection, timely treatment, and appropriate preventive measures can help reduce their impact. Understanding how these infections spread and recognising their symptoms can support timely medical care. Health insurance can also help manage eligible healthcare expenses related to consultations, diagnostic tests, treatment, and hospitalisation.

If you are looking for financial support for unexpected healthcare expenses, review available health insurance options and apply now for coverage that suits your needs.

Frequently Asked Questions

About communicable diseases

Health protection

What are communicable diseases, and how do they spread?

Communicable diseases are infections that can spread from one person to another, directly or indirectly. Transmission can occur through respiratory droplets, physical contact, contaminated food or water, infected blood or body fluids, and vectors such as mosquitoes.

Can you provide examples of common communicable diseases?

Common communicable diseases include influenza, tuberculosis (TB), COVID-19, dengue, malaria, measles, cholera, typhoid, hepatitis, and certain sexually transmitted infections.

What are the most effective strategies for preventing communicable diseases?

Prevention includes regular handwashing, appropriate vaccination, safe food and water practices, covering coughs and sneezes, avoiding close contact with people who are unwell, and following appropriate infection-control measures.

Which diseases does the WHO classify as communicable?

The World Health Organization (WHO) recognises communicable diseases as infectious diseases that can be transmitted between people, from animals to people, or through vectors and contaminated sources. Examples include TB, malaria, dengue, influenza, HIV infection, and hepatitis.

What is the difference between infectious and communicable diseases?

An infectious disease is caused by an infectious agent such as a virus, bacterium, fungus, or parasite. A communicable disease is an infectious disease that can be transmitted between people or through other routes. Therefore, not every infectious disease is necessarily communicable.

How can I protect myself from communicable diseases in India?

You can reduce your risk by staying up to date with recommended vaccinations, maintaining hand hygiene, consuming safe food and water, preventing mosquito bites, practising respiratory hygiene, and seeking medical advice when symptoms develop.

What are the main causes of communicable diseases?

Communicable diseases are caused by infectious agents, including viruses, bacteria, fungi, and parasites. These agents can spread through respiratory droplets, direct contact, contaminated food or water, blood and body fluids, or vectors such as mosquitoes.

Does health insurance cover treatment for communicable diseases like dengue or TB?

Health insurance can cover eligible treatment expenses for communicable diseases such as dengue or TB, depending on the policy. Coverage can include eligible hospitalisation, diagnostic tests, medicines, and other medically necessary expenses, subject to the policy terms, exclusions, and applicable waiting periods

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