What are vectors in biology class 9 examples?
Vector: A vector is an organism that carries disease causing microbes (pathogens) from one host to another. They are the carriers of infection. Example: Mosquito, housefly, etc.
What causes wind class 9?
Ans: The uneven heating of the earth’s surface is the main cause for the winds. On being heated more the air raises up and hence low pressure is created. Hence, the air in high pressure occupy the low-pressure region causing the wind.
What causes inflammation class 9?
The immune system is also activated in response to the infections. The microorganisms enter into the tissues and damage it. The immune system recruits the disease-causing microbes and destroys them. This is known as inflammation.
Is malaria a vector borne disease?
The most deadly vector borne disease, Malaria, kills over 1.2 million people annually, mostly African children under the age of five. Dengue fever, together with associated dengue haemorrhagic fever (DHF), is the world’s fastest growing vector borne disease.
How can we prevent vector borne diseases Class 9?
Vector-Borne diseases can be prevented in the following ways:
- Vaccines should be developed for protection against disease-causing viruses.
- Insect repellants such as DEET or Permethrin can be applied to the skin and clothes respectively.
- Tick checks should be performed after exposure to dogs, cats, cattle, and mice.
What is inflammation in body class 9?
An active immune system recruits many cells to the affected tissue to kill off disease causing microbes. This is called inflammation. Symptoms: Swelling, pain, fever.
Is Hepatitis A vector borne disease?
Transmission. The virus is acquired through close contact with infected individuals or through faecally contaminated food or drinking-water. There is no insect vector or animal reservoir.
What is not a vector borne disease?
A crucial element in reducing the burden of vector-borne diseases is behavioural change….List of vector-borne diseases, according to their vector.
|Disease caused||Chikungunya Dengue Lymphatic filariasis Rift Valley fever Yellow Fever Zika|
|Type of pathogen||Virus Virus Parasite Virus Virus Virus|
What animal causes Ebola?
Scientists do not know where Ebola virus comes from. However, based on the nature of similar viruses, they believe the virus is animal-borne, with bats or nonhuman primates (chimpanzees, apes, monkeys, etc.) being the most likely source.
What is penicillin class 9?
Penicillin antibiotic blocks the bacterial processes that build the cell-wall. Due to this drug, the bacteria is unable to make a protective cell-wall and dies easily. It is used to cure the diseases and infections caused by bacteria. Answer verified by Toppr.
What is Class 9 Immunisation?
Answer: Immunization is a process in which an organism is made immune to fight against the disease causing pathogen. This is done by administration of vaccines. Vaccines are drugs or medicines, which contains a biological agent which mimic the one that resembles a disease causing pathogen, present inside the body.
What is Community Health Class 9?
Community health is the maintenance, protection and improvement or overall well-being of health of whole community in which an individual lives. The various measures are as follows. Public cleanliness It includes proper sanitation, sewage drainage and garbage disposal.
What are vectors for a disease?
Vectors are organisms that transmit pathogens and parasites from one infected person (or animal) to another, causing serious diseases in human populations. These diseases are commonly found in tropical and sub-tropical regions and places where access to safe drinking-water and sanitation systems is problematic.
Which disease is caused by name of Toad?
An international study has determined that a fungal disease – called chytridiomycosis- has caused dramatic population declines in more than 500 amphibian species – mostly frogs, but also toads and salamanders – including 90 extinctions.
What are the most common vectors?
Common vectors include mosquitoes, ticks and various types of flies. Mosquitoes cause the. In the United States, the number of vector-borne diseases has been increasing over time.
Is a mosquito a vector?
Some mosquitoes are vectors for diseases. This means they can transmit diseases from one human or animal to another. Typically, the diseases are caused by viruses or tiny parasites. For example, a mosquito that bites an infected human or animal can pick up a virus along with the blood meal.
What are the factors affecting health class 9?
The important intrinsic factors which affect human health are the following:
- Malfunctioning or improper functioning of various body parts such as heart, kidney, liver, etc.
- Genetic disorders.
- Hormonal imbalances.
- Malfunctioning of immune system of body, e.g., allergy.
How do we kill microbes Class 9?
The bacterial infections can be cured by using antibiotics. Antibiotics are the medicines that inhibits the growth or kills the bacteria cauisng microbes by blocking the pathway for bacterial synthesis but doesnot affect its own pathway.
Are vector-borne diseases contagious?
Communicable Diseases – Vector-borne Diseases. What are vectors? Vectors are living organisms that can transmit infectious diseases between humans (or from animals) to humans.
What is inflammation in biology class 9?
Inflammation is the immune response of the body. It is an attempt by the body to remove harmful stimuli and start the curing process. Inflammation is mostly localised reaction which results in the redness of the area, releases heat and sometimes causes irritation. In chronic cases inflammation also causes swelling.
What is a biological vector give two examples?
[vek´tor] 1. a carrier, especially the animal (usually an arthropod) that transfers an infective agent from one host to another. Examples are the mosquito that carries the malaria parasite Plasmodium between humans, and the tsetse fly that carries trypanosomes from other animals to humans.
What is a vector insect?
Vectors are living organisms that can transmit infectious diseases between humans or from animals to humans. Mosquitoes are the best known disease vector. Others include ticks, flies, sandflies, fleas, triatomine bugs and some freshwater aquatic snails.
What is a vector-borne?
Vectors are mosquitoes, ticks, and fleas that spread pathogens. A person who gets bitten by a vector and gets sick has a vector-borne disease. Some vector-borne diseases, like plague, have been around for thousands of years. Others, like Heartland virus disease and Bourbon virus disease, have been discovered recently.
What are the principles of prevention class 9?
Principle of Prevention
- Once someone has a disease,its body function are damaged and may never recover completely.
- Treatment of disease takes time which means that if someone suffering from a disease he is like to bedridden for sometime even if we give them proper treatment.
Which of the following is a vector borne disease?
Vector-Borne Disease: Disease that results from an infection transmitted to humans and other animals by blood-feeding anthropods, such as mosquitoes, ticks, and fleas. Examples of vector-borne diseases include Dengue fever, West Nile Virus, Lyme disease, and malaria.
Can humans be disease vectors?
Many factors affect the incidence of vector-borne diseases. These factors include animals hosting the disease, vectors, and people. Humans can also be vectors for some diseases, such as Tobacco mosaic virus, physically transmitting the virus with their hands from plant to plant.
What are vectors Class 9?
What is vectors? The organisms that carry the infectious agents from a sick person to a potential host or healthy person are called vector. These organisms are responsible for the spread of the diseases.