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Geography

Grade 5

Health and well-being

Module 34

Diseases: hiv/aids

HIV / AIDS

Activity 1:

To define a concept

[LO 1.1]

  • After a thorough group discussion, briefly define a definition for HIV as well as for Aids , so that the difference between the two is clear.

This disease has an impact on millions of people on our continent alone, as well as on people all over the world. The fact that there is still no cure for Aids makes it a greatly feared disease.

The HI virus causes the disease Aids

Acquired

Immune

Deficiency

Syndrome

  • Origin and nature:The human body has a built-in immune system that protects it against disease and infection. The HI virus attacks this system and prevents it from functioning successfully. The virus is present in human bodily fluids. It weakens the immune system to such an extent that the body finds it difficult to combat diseases such as TB, pneumonia and diarrhoea. It is only through a blood test that one can determine whether someone has been infected with the virus.As is the case with many other diseases, Aids is spread more readily in densely populated areas, and particularly where people do not eat wholesome food. The HI virus can be transmitted from one person to the other in the following ways:
  • When someone who is infected with the virus has unprotected sex (without a condom) with someone, and the semen or vaginal fluid mixes with that of the other person.
  • When an infected person’s blood mixes with someone else’s blood. This can happen if infected blood is accidentally transfused, or if contaminated injection needles or razor blades are used.
  • A pregnant woman who is infected with the virus can transmit it to her unborn child.

This dreaded disease has spread very rapidly since it was first diagnosed round about 1980.

Activity 2:

To represent statistics by means of a graph

[LO 1.1, 1.7]

  • Use the following statistical information and compile a block graph to represent the increase in the cases of HIV between 1990 and 1999.
Year Percentage of the total population that are estimated to have been infected with HIV
1990 0,7%
1991 1,7%
1992 2,2%
1993 4%
1994 7,6%
1995 10,4%
1996 14,2%
1997 17%
1998 22,8%
1999 22,4%

(Remember to provide clear axis calibration and labels as well as an explanatory caption for your graph.)

  • Typical symptom:
  • a weakened body that is highly susceptible to other diseases.
  • Treatment:

Although Aids is still an incurable disease, sufferers can take certain medication to alleviate the symptoms. However, this type of medication is very expensive.

  • Breakthrough:

The HI virus is a very cunning rogue that penetrates the body silently and then assumes the characteristics of the other cells of the body. In this way it can move around in the body and infect the human immunity cells without being detected. Researchers at the Pasteur Institute in France believe that they are very close to a breakthrough.

Read the newspaper report printed below and have a group discussion on its contents.

breakthrough in fight against aids may be close

(SAPA-AFP)

In what is seen as a possible breakthrough in the fight against HIV/Aids, antibodies have been stimulated that could possibly prevent the HI virus from infecting human immunity cells, French researchers disclosed recently.

Questions & Answers

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Social sciences: geography grade 5. OpenStax CNX. Sep 23, 2009 Download for free at http://cnx.org/content/col10986/1.2
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