The following points highlight the two main modes of transmission of communicable diseases in humans. The modes are: 1. Direct Transmission of Communicable Diseases, 2. Indirect Transmission of Communicable Diseases. Mode # 1. Direct Transmission of Communicable Diseases: In this, the pathogens are transmitted from an infected person to a healthy person directly without an intermediate agent. It occurs in [...]
In this essay we will discuss about manifestation of diseases in humans and its prevention. Manifestations of Diseases: Diseases are characterised by interference in the normal functioning of the body leading to impairment of health. These diseases show certain abnormal changes in the functioning or the appearance of one or more symptoms of the body, called disease symptoms, like headache, [...]
Read this article in Hindi to learn about the pollution related diseases. प्रदूषण आज की प्रमुख समस्या है । प्रदूषण से पेड़-पौधों एवं जन्तुओं को अनेक रोग होते हैं । आप अपने क्षेत्र में जल, वायु एवं मृदा प्रदूषण से होने वाले प्रभावों का अवलोकन करें । यदि आपके गाँव/शहर में या आसपास कोई कारखाना है तो वहाँ काम कर [...]