Biology Questions and Answers
making difficult their recognition by the
immune system.
- What is the cause of the
immunodeficiency presented
by AIDS patients?
The cause of the immunodeficiency
presented by AIDS patients is thedestruction of CD4 T helper
lymphocytes by the HIV. With this
destruction thbecomes impairee immud and the body cannotne system (^)
defend itself anormally do not develop ingainst many d iseases that
immunocompetent people.
- What is the difference
between carriers of HIV and
AIDS patients?
A person can bwithout necessarilye a carrier being affected byof the HIV (^)
the immutime since thnodeficiency syndrome virus can remain e at thatin the
body for many years without producing
clinicalcondition is characteriz manifestations. The AIDSed when the (^)
patient actually becomes
immunodeficient and begins to showsigns and symptoms of opportunistic (^)
diseases.
- How does the CD4 counting
act to monitor the HIV
infection? What is another
laboratory method to follow
up the disease?
The CD4 counting test is done from ablood sample the HIV. In this test the number of CD4of a person infected by (^)
cells is counted. If that number
(concentration) is ameans immunodeficiency and thebnormally low it
patient usually must be treated with
antiretroviralto follow up the infection is the viral drugs. The other test used
load test. In this test the number of HIV
virus is estimateindicating whether the treatmed from a blood samplent
(control) of the disease has been
successful or not.
- What are the main
opportunistic diseases that
can affect AIDS patients?
Among the opportunistic diseases thataffect HIV infected people during the
AIDS stage some are: mucocutaneous
and systemicsarcoma (blood vessel tum candidiasis, Kaposi’sors that (^)
result in darkened spots on the skin and
internal ocytomegalovirus inrgans), tuberculosis,fection, pneumonia (^)
by the fungus P. Carinii (pneumocystis
pneumonia), toxoplamosis, heSome other opportunistic diseases arrpes, etc.e:
salmonellosis, histoplasmosis,
aspergillosis,isosporiasis, lymphomas. cryptococcosis,
- How long is the incubation
period of the HIV? What is
meant by acute AIDS?
The incubation petime interval between the infection riod of the HIV (theand (^)
the beginning of the immunodeficiency
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