VIRUSES AND THE INFECTIONS THEY CAUSE

 

VIRUSES AND THE INFECTIONS THEY CAUSE: Viruses are very unique microbes compared to the rest of the microbes such as bacteria, protozoa and parasites.  The difference in microbes puts viruses on the farthest extreme in terms of structure, the diseases they cause, and even the drugs that can help eliminate some of them.  They are some of the most resistant infectious agents with various characteristics ranging from complex survivor capability to poorly explained genetical variations.  On this page, we are looking at some of the most common viral pathogens and the diseases they cause but before we continue, we have looked at bacteria before and now, let us look at some of the differences between a typical bacterial strain and a viral particle;

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THE HUMAN RESPIRATORY SYSTEM

 

THE HUMAN RESPIRATORY SYSTEM:  The human respiratory system is one of the most important in the human body because it is where gaseous exchange takes place.  It starts from the nares of the nose, and ends with the alveola sacs deep into the lungs, in the thoracic cavity with some of the most common organs being the nasal cavity, pharynx, larynx, trachea, bronchus and bronchioles and then the lung tissue.  In the human body, it is only in the respiratory system that gaseous exchange takes place.

CHARACTERISTICS OF THE RESPIRATORY SYSTEM............

RELATIONSHIPS TO THE SYSTEM:  Like we can see with many body systems, there are several organs and systems in close proximity to the respiratory system as we are going to elaborate;

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RELATED;

1.  DYNAMICS OF THE HUMAN BODY-SYSTEMS MAKEUP

2.  EXCHANGE OF GASES IN THE HUMAN BODY

DYNAMICS OF HUMAN IMMUNITY

DYNAMICS OF HUMAN IMMUNITY:  Human immunity is one of the most important and functional systems in the human body and located in all parts of the body.  Despite the fact that we meet microbes on a daily basis and everywhere we are, we also harbor a vast number microbes especially bacteria on and in our different body parts.  In my previous discussions I have been talking about the collectiveness of some of them, and they are termed; The human microbiome.  

The human immunity is a diverse system that is meant to fight both the foreign invading microbes and chemicals and the very microbes that are commensals on and in our bodies.  In our discussion here, we are going to look at what actually happens when we say the body is immune and or not immune to a specific invader.

HOW DO WE GET IMMUNE TO INVADERS?  The very first question everyone need to ask is; How do I get protected from a microbe X, let's say, a bacteria; Streptococcus pneumoniae?   In most cases to be immune to a microbe, we must get exposed to it.  Once the body's immune system recognizes such microbe, it tends to take it as foreign and fight it via the various mechanisms the we explained earlier and, retains a memory on how to attack it.

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RELATED;

1.  THE HUMAN MICROBIOME

2.  DYNAMICS OF DRUGS AND THE HUMAN BODY

3.  PNEUMOCOCCUS