Some microorganisms present in our surroundings are harmful. They may enter into our body through air, water or through our food. However, some of them can also be carried out through animals or insects or other means, known as vector. Which of the following diseases is/are spread by a vector?

Dengue

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Malaria

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Diptheria

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Tetanus

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct options are
A Dengue
B Malaria
$∙$ Various microorganisms present in our surroundings can cause diseases and are known as pathogens. They may enter into our body directly through the air we breathe, the water we drink or through the food we eat. However, some of them can also be transmitted by direct contact with an infected person or carried out through animals or insects, known as vectors.
$∙$ Dengue fever is caused by a virus and malaria is caused by a protozoan called Plasmodium. Both these diseases are spread by mosquitoes acting as vectors. Dengue is spread by the female Aedes mosquito while the female Anopheles mosquito spreads malaria.
$∙$ Diphtheria and tetanus are caused by bacteria and the mode of transmission is through contaminated water, food, direct contact. These diseases do not spread by vectors.

Suggest Corrections

Similar questions

Why should you always wash your hands before handling food and after coming from the toilet?

Answer: many people touch object in the washroom with their dirty hands like after sneezing or after coming from outside. This leads to spreading of germs or tiny organisms which cannot be seen through naked eyes known as microorganism. As the washroom are warm this may lead to rapid growth of microorganism. After we use the washroom these microorganism may still remain in our hand so if we handle the food without washing our hands there are chances that these microorganism might enter our body which may harm our body. Hence it is advisable that we should wash our hands after coming from the washroom before handling food.

_______ spread by coming in contact with a sick person or by a disease-carrying vector or through contaminated food and water.

As phagocytes or special cells cannot distinguish between pathogens so it is said that they engulf every pathogen present in the body . So my que is that, it is not necessary that all pathogens entering into the body are harmful some of them may be useful then are they also killed by these phagocytic cells?

How does harmful chemicals enter our bodies through the food chain?

Q. Microorganisms are our friends and foes. Some of them are useful for us while some of them are harmful. From the given list sort out useful and harmful actions of microorganisms.
Production of antibiotics, food spoiling, curd preparation, vaccine production, citrus canker.

Join BYJU'S Learning Program