Human Health: Infectious Diseases, Pathogens, and Prevention

HUMAN HEALTH
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Table of Contents
INTRODUCTION...........................................................................................................................3
MAIN BODY...................................................................................................................................4
1.1 Define the terms infectious diseases and pathogens.............................................................4
1.2 List the characteristics of virus, bacteria, fungi and Protoctista. .........................................4
2.1 Identify the ways through which pathogens are spread........................................................5
2.2 Discuss the methods through which personal hygiene and use of antiseptics can prevent
the spread of infectious diseases. ...............................................................................................5
2.3 Describe the personal, social, economic problems related to HIV.......................................5
3.1 Define the terms immunity and immunisation. ....................................................................6
3.2 Define antibody formation resulting from both natural and artificial exposure to antigens. 6
CONCLUSION................................................................................................................................7
REFERENCES................................................................................................................................8
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INTRODUCTION
Human health can be define as a state of complete mental, physical and social well-being
in order to lead a healthy life. It is a central part of human well-being and happiness. It makes a
crucial contribution to overall economic progression, as being free from any illness and diseases
will lead to a healthy population which eventually makes them more productive (Roenneberg
and Merrow, 2016). The following report is focusing on the nature of micro-organisms.
Furthermore, it will cover the effects of personal behaviour on the spread of infectious diseases.
At last, effect of medical research and development on spread of infectious diseases will be
discussed.
MAIN BODY
1.1 Define the terms infectious diseases and pathogens.
Infectious disease can be define as a medical condition which is caused by number of
pathogenic organisms such as virus, bacteria, fungi and may more. It is a communicable diseases
and can be pass from one person to another directly or indirectly (Wright and Kelly, 2017). Signs
and indications of such sort of diseases are totally depended on the organism causing that
particular infection.
Organisms that cause infectious diseases are known as pathogens. It is basically an
infectious agent that cause illness to its host. They weakens the immune system of the human
body by directly penetrating through the skin, body fluids and many other forms. Some of the
common examples of pathogens are virus, bacteria, fungi and parasites.
1.2 List the characteristics of virus, bacteria, fungi and Protoctista.
Bacteria, virus, fungi and Protoctista are all infectious agents that cause infectious
diseases to the body. They all poses different characteristics according to their functions. Some
of their characteristics are listed below.
Virus:
 They are consist of a protein and nucleic acid.
 The size ranges from 20-250nm.
 They are dependent on the machinery of host cells.
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