As technology increases and researchers learn, treatment for many diseases is available. So one may ask, why do infectious diseases reemerge? The problem is that some microbes have evolved. They have demonstrated their outsmarting ability to adapt, survive and challenge us yet again.

One such disease is Acquired Immuno-Deficiency Syndrome or AIDS/HIV. Last year alone, over forty million people were infected with AIDS and three million died. AIDS was introduced by a small group of rats that came to Italy abroad a traading ship from Turkey. Small Pox transmitted by trade goods from the Hudson Bay Company wiped out the entire Native American tribes. In the early 1980\'s , The Center for Disease Control and Prevention became aware that a new “virus” was effecting certain segments of society. In 1985, researchers isolated the virus that was being held responsible for AIDS. The definin

tion for the virus has changed many times, however the most recent definintion describes it as all HIV infected person who have a CD4 cell count of 200 cells per microleter of blood. In addition to laboratory evidence of an HIV infection coexisting with one or more disease indicators.

There are many symptoms of HIV and are different with many patients. The earliest sign is having flu like symptoms. These include fever, abdominal pain, coughing, chills, diarrhea and cancer. Other symptoms are disorders of the lymphatic system, muscle and joint pain, malaise, oral lesions, night sweats, sink rash, shortness of breath, sore throat disorientation and wight loss.

HIV has been a major problem for homosexuals. Hence, making anal intercourse the number one way to become infected with the virus. This is the result of tearing of the rectal mucosawhich allows for direct infusion of the infected semen into the blood stream. Vaginal intercourse is the second most popular for the same reasons. This is also true for oral intercourse. Prostitutes were also affected by this epidemic because of their tend to have casual, unprotected sex. The ost powerful form of transmission from one human to another is through direct blood transfusions or using an infected hypodermic needle. Less frequent modes of transmission include vertical transmission(mothe rto baby during pergnancy or delivery) and occupation expusure. Occupational exposure is exteremely rare and occurs in such jobs as healthcare, police officers, fire fighters, military personal and prison employees.

Transmission of HIV is very clear. Because a virus must have a host in order to survive, HIV is transfered person to person through infected body fluids. These include blood, cervicovaginal secretions, semen, breast milk pericardial, cerebrospinal, synovial, peritoneal and amniotic fluids. However, not all fluids contain the virus. These include urine, feces, and saliva. The ability for HIV to be transmitted via an infected fluid from one human to another is determined by a variety of things such as frequency and duration of exposure, the amount of the virus inoculated and

Some topics in this essay:
Transmission HIV, RNA DNA, Transcriptase Inhibitors, AIDS AIDS, Diagnosing HIV/AIDS, , Control Prevention, Nucleoside Analogues, Syndrome AIDS/HIV, Western African, infected person, immune system, infected virus, reverse transcriptase, cellular dna, class drugs, bone marrow, rna dna, vaccine offer, blood tested,