Analyzing Micro Organisms And Disease Essay

1673 Words May 30th, 2016 null Page
Microorganisms are living organisms which can be seen only with the aid of microscope. They are widespread in nature and are beneficial to life, but some can cause serious harm. There are six major types of micro-organisms these are bacteria, archaea, fungi, protozoa, algae, and viruses. This essay aims to analyse micro-organisms and disease. First the key features of the main categories of micro-organisms and the roles of commensals, and pathogens will be explained respectively. Then mode of transmission, portals of entries and exits of microbes are explained. How our body defence mechanisms prevent from the infections will be discussed after the logical sequence of events that occur from the entry of a micro-organism in the body to the appearance of symptoms of a disease will be explained. Finally the paper explains the logical sequence of the signs, symptoms and treatments of the HIV virus.
Viruses are the ‘living dead’ infectious agents that can infect animals, plants and bacteria.1 Virus size is approximately one hundred times smaller than bacteria (20-300nm) that can pass through filters that retain smallest bacteria and cannot be seen through a light microscope. Viruses do not have cell components, but they do have nucleic acid, either DNA (most animal viruses and bacteriophages) or RNA (some animal viruses and plant viruses Tobacco Mosaic Virus) inside a protein coat capsid. Some may have viral envelope and/or tail. They can be crystallised and can only replicate…

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