Hovy does the transmission of each of the following diseases take place?
(a)Amoebiasis (b) Malaria
(c)Ascariasis (d) Pneumonia
(a) Amoebiasis – It is usually contracted by ingesting water or food contaminated by amoebic cysts.
(b)Malaria – It is transmitted from one person to another by the female Anopheles mosquito. The mosquito picks up the parasite along with the blood when it bites an infected person. When this mosquito bites an other healthy person, the parasites migrate into his blood with the saliva, which the mosquito injects before sucking up blood to prevent its clotting.
(c)Ascariasis – Transmitted through water, vegetables, fruits etc. contaminated with the eggs of the parasites.
(d)Pneumonia – Spreads by cough & sneezes, by sharing drinking glass & eating utensils with an infected person.
What is the mechanism by which the AIDS virus causes deficiency of immune system of the infected person?
What are the various public health measures, which you would suggest as safeguard against infectious diseases?
What are the various routes by which trans-mission of human immunodeficiency virus takes place?
In your view what motivates youngsters to take to alcohol or drugs and how can this be avoided?
The following are some well-known abbreviations, which have been used in this chapter. Expand each one to its fall form:
(a)MALT (b) CMI
(c)AIDS (d)NACO
(e)HIV
Discuss with your teacher what does ‘a suitable gene' means, in the context of DNA vaccines.
Why is that once a person starts taking alcohol or drugs, it is difficult to get rid of this habit? Discuss it with your teacher.
Differentiate the following and give examples of each
(a)Innate and acquired immunity
(b)Active and passive immunity
Hovy does the transmission of each of the following diseases take place?
(a)Amoebiasis (b) Malaria
(c)Ascariasis (d) Pneumonia
Do you think that friends can influence one to take alcohol/drugs? If yes, how may one protect himself/herself from such an influence?