In which way has the study of biology helped us to control infectious diseases?
The science that makes a study of diseases is called pathology, though in a broad sense it includes diagnostic, prophylactic and curative measures too. Pathology is a study of diseases of all kinds though we will confine ourselves to the diseases caused by a pathogenic organism, the reaction of the host as shown in the form of symptoms, the diagnosis made through a study of their symptoms, etiology of the pathogenic organism and finally steps undertaken to cure the host of its diseases, by eradicating and if it is not possible, by controlling the pathogen. In this way the study of biology helped us to control infectious diseases.
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.
Hovy does the transmission of each of the following diseases take place?
(a)Amoebiasis (b) Malaria
(c)Ascariasis (d) Pneumonia
Differentiate the following and give examples of each
(a)Innate and acquired immunity
(b)Active and passive immunity
Do you think that friends can influence one to take alcohol/drugs? If yes, how may one protect himself/herself from such an influence?