Saturday, October 31, 2009

How can humans habor microoranisms on & inside their bodies withouth experiencing symptoms of infection?

The human body plays host to many organisms, both on the skin and inside the body. Many of these are benign and even helpful to us. They are our resident flora. They aid in digestion and control the numbers of harmful bacteria, viruses and molds (yeasts), keeping them in balance. Upsetting the balance of good to bad, opens the door to illness.Of the millions of organisms, very few are pathogenic, that is, capable of causing disease. Even when there are present those organisms known to be pathogenic, they must be in numbers sufficient to cause a problem. Our immune system ordinarily handles these efficiently.Pathogenic bacteria, for example, are opportunistic. They must have a way in - usually a break in the skin or by ingestion and inhalation. Again, the numbers must be sufficient to cause a problem.Our mouths harbor millions of bacteria and viruses. Routine and regular oral care removes many of these and our saliva also helps to kill bacteria. Tears have a mild antibacterial effect. The tiny hairs (cilia) in our respiratory tract work to remove invaders and are coughed, sneezed or expectorated out in mucus (another body defense mechanism). Digestive acids kill off harmful bacteria and viruses.Our bodies have many defense systems - an intact skin being the most important barrier and an intact, healthy immune system being another.
Our body's infection fighting organisms differentiate between good and bad organisms.
Not all bacteria are infectious or harmful. Some are beneficial, in fact.
the germ usual is encapsulated and usu no both to host like with TB people carry it and it can make then sick later in life when immunity decreases.people even carry around hiv thas dorment.
only a few types of microrganisms are harmful. The rest can live inside your digestive tract or your airway without causing any problem. As a matter of fact there are some that are required for a healthy digestive tract.

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