The Human Immunoefficiency Virus is a human retrovirus
( lentivirus ) that is widely believed to be the single causative
factor in AIDS ( Acquired Immunodeficiency Syndrome ). A great deal
of controversy surrounds the HIV retrovirus theory. For our purposes,
however, these controversies are clinically irrelevant. Formal clinical
diagnosis of AIDS is performed as follows:
1. The individual tests positive to HIV antibodies
( ELISA test conducted twice ).
2. The Western Blot test is then used to determine
the presence of HIV proteins in the blood.
3. When all three tests return positive, the individual
is considered "HIV Positive".
The progression of the disease ( AIDS ) is then
determined by medical staff. One indicator is the actual viral load
in the blood. The test to determine viral loads for HIV is currently
determined by measuring HIV RNA. The RNA is the replicating substance
of the virus. The viral load test is formally called the Amplicor
HIV-1 Monitor test, also known as the PCR test ( there is an "ultra
sensitive" PCR test that is more reliable ). The results are
given either as the number of HIV RNA in .05 ml of blood, or as a
"standard" result ( multiplying the RNA times 20 for the
end number used ). The viral load is considered a good marker for
disease progression. According to one major study1, those
with a viral load of less than 20,000 have a 1% chance of disease
progression during the 60 week period of the testing time. The same
study concluded that those with a viral load of greater than 20,000,
if the viral load could be reduced by 70% in an eight week period,
reduced the chance of disease progression by 50% over the period of
study ( approximately 1.5 years ).
The HIV virus is widely accepted
as causing a breakdown of the immune system, leaving the individual
open to a host of secondary viral, bacterial, fungal and parasitic infections,
as well as specific forms of cancer. The immune system breakdown is
caused, at least in part, by the reduction of T-cells resulting from
virus replication. The T-cell count of a healthy individual is roughly
one million per one milliliter of blood. Formal diagnosis of AIDS includes
a T-cell count below 200,000.
Bacterial Infections Associated with AIDS:
-
Mycobacterium avium complex (MAC)
- Normally a bacterial infection occuring in the lungs, but with
advanced HIV and a CD4 lymphocyte count of less than 50, the infection
can be systemic
-
Tuberculoses - Most commonly
a lung infection
-
Salmonellosis - Acquired from
contaminated foods
-
Bacillary angiomatosis - Most
often occurs as bright red/purple splotches on the skin
Viral Infections Associated with
AIDS:
-
Cytomegalovirus (CMV) - Herpes
Virus
- Viral Hepatitis - Liver infection
- Herpes Simplex Virus ( HSV ) - Genital Herpes
- Human papillomavirus (HPV) - Warts/Genital Warts
- Progressive multifocal leukoencephalopathy (PML
) - A severe infection occuring in the brain
Fungal Infections Associated with AIDS:
- Candidiasis - Causes inflammation of mucous membranes,
affecting the tongue, mouth, esophogus, and/or vagina.
- Cryptococcal meningitis - Infection of the spinal
cord and/or brain
Parasitic Infections Associated with AIDS:
- Pneumocystis carinii pneumonia (PCP) - Parasitic
lung infection
- Toxoplasmosis - Parasitic infection that causes
brain lesions
- Cryptosporidiosis - Infection causing severe
diahrrea
Cancer associated with AIDS:
- Kaposi's sarcoma - Skin Cancer
- Non-Hodgkin's lymphoma - Lymphatic cancer that
usually originates in the lymph nodes