1) What Is a Pathogen?
- Disease-causing organisms are called pathogens.
- It can be a fungus, a bacterium, a parasite etc.
- Pathogens can be treated with medicines.
2) What Is Epidemiology?
- Epidemiology is the scientific study of the patterns and distribution of contagious diseases among a group of people.
- Epidemiology is important as it is related to public health.
- This type of study helps us to analyse the basic health needs of a population.
- It also helps us to determine the efficacy of certain medicines given to a particular population exposed to a specific disease.
3) Write Five Basic Characteristics of Insects.
Five characteristic features of insects are:
- An insect's body is divided into three parts: head, thorax and abdomen.
- Insects have wings to fly.
- Insects have jointed body segments, and the legs of an insect are made up of several jointed parts.
- They have three pairs of legs and a pair of compound eyes.
- All insects have a pair of antennae at the top of their head.
4) Name a Few Vectors and Diseases Caused by Them, and Also Mention the Pathogens Responsible for Those Diseases.
Vector name |
Disease name |
Pathogens |
Lice |
Typhus |
Bacteria |
Sandflies |
Sandfly fever or Leishmaniasis |
Parasite |
Tsetse flies |
Sleeping sickness |
Parasite |
Ticks |
Spotted fever |
Bacteria |
5) State the Differences Between Anopheles, Aedes and Culex Mosquitoes.
The differences between Anopheles sp, Aedes sp and Culex sp mosquitoes are as follows:
6) What is Zika fever?
- Zika fever is an infectious disease caused by the zika virus.
- The primary carrier of this virus is Aedes spp. mosquitoes.
- A few common symptoms of Zika fever are muscle and joint pain, high fever with a headache, rashes all over the body, and conjunctivitis.
- Zika fever lasts for 7 to 10 days.
- Zika fever is an infectious disease caused by the zika virus.
- The primary carrier of this virus is Aedes spp. mosquitoes.
- A few common symptoms of Zika fever are muscle and joint pain, high fever with a headache, rashes all over the body, and conjunctivitis.
- Zika fever lasts for 7 to 10 days.
7) Name the Pathogens That Cause Malaria.
Some malaria-causing pathogens are:
- Plasmodium falciparum
- Plasmodium vivax
- Plasmodium malariae
- Plasmodium ovale
- Plasmodium knowlesi
8) What Is Filariasis, and Which Mosquitoes Spread This Disease?
- Filariasis is a tropical disease caused by a variant of thread-like roundworms.
- This disease causes swelling in the lymph nodes present under the arms and groin area. It also causes the thickening of the skin.
- Culex spmosquitoes carry the infectious parasites of this disease.
9) What Is West Nile Fever?
Some malaria-causing pathogens are:
- It is an infectious disease caused by Culex sp mosquitoes. West Nile virus pathogen causes this disease.
- This flu-like disease is characterised by high temperature, nausea, vomiting and digestive issues.
- Prolonged infection due to West Nile fever can cause severe damage to the brain.