BIOLOGY IN HUMAN WELFARE
HUMAN HEALTH AND DISEASE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Vectors / do not
|
|
|
Sectors / greatly
|
|
|
Either A or B
|
|
|
None of the above
|
Detailed explanation-1: -Vectors are frequently arthropods, such as mosquitoes, ticks, flies, fleas and lice. Vectors can transmit infectious diseases either actively or passively: Biological vectors, such as mosquitoes and ticks may carry pathogens that can multiply within their bodies and be delivered to new hosts, usually by biting.
Detailed explanation-2: -With vertebrate hosts, vectors become infected when they acquire a pathogen from an infected host during a blood meal, a practice known as haematophagy.
Detailed explanation-3: -So, the correct answer is ‘Polio’.
Detailed explanation-4: -Vectors are insects, rodents, birds, or other animals that can carry disease pathogens. The most common vectors are insects that suck blood, such as mosquitoes and ticks. VBDs occur in both animals and humans. Every year there are about 700, 000 human deaths from vector-borne diseases occur worldwide.