The Spread of Disease In the New World :: American America History

The Spread of sickness In the New WorldThe extraordinary practiced health of the natives prior to the coming of the Europeans would become a key subdivision in their disastrous undoing. The greatest cause of disease in the States was epidemic diseases imported from Europe. Epidemic diseases killed with added virulence in the virgin commonwealth populations of the Americas. The great plague that arose in the Old World never emerged on their own among the western hemisphere and did not spread across oceans until Columbus discovery. Disease and parasitism play a pervasive role in all life. umteen of these diseases start with microparasites, which atomic number 18 characterized by their ability to reproduce subscribely inwardly an individual swarm. They are also characterized by their small size, short continuation of infection, and the production of an immune response in infected and recovered individuals. Microparasites which suffering hosts in the course of their associati on are recognized as pathogens. The aim of the interaction and the extent of the resultant damage depends on both the virulence of the pathogen, as well as the host defenses. If the pathogen can overcome the host defenses, the host will be damaged and may not survive. If on the other hand the host defenses overcome the pathogen, the microparasite may fail to found itself within the host and die. The main objectives of the pathogen are to gain entry inner(a) the host, once inside grow and reproduce, and avoid host defenses. There are three possible routes of infection respiratory, alimentary, and traumatic. The respiratory route is the easiest and most direct means of entry. Under crowded conditions, the rate of infection is even more rapid. The diseases brought over to America were mainly spread by the respiratory method. The alimentary pathway of infection is through the ingestion of contaminated food and water. passim Europe during the 15th century, food and water were cont aminated with fecal case and by unsanitary habits ( i.e. the lack of bathing). The traumatic route of infection is through insect and animal bites. The objective of the host is to escape from the pathogen. This can be done through the use of the immune system or by quickly dying. When a host dies with the pathogen still inside the pathogen dies as well. defense to invaders evolved as a result of the development of the mechanism of privilege. The development of immunity depends on the recognition of differences in chemical structures of substances.