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Geography

Grade 5

Health and well-being

Module 33

Diseases: malaria, tuberculosis, cholera

We shall now take a look at a few serious diseases that are found all over the world. These terrible diseases are often the cause of many deaths.

Malaria

  • Origin and nature:Malaria is a disease that is found in the tropical and subtropical climactic zones (mostly in the northern parts of South Africa). It is caused by a tiny parasite that enters the bloodstream when one is bitten by a certain female mosquito. The parasite spends part of its life cycle in the human body. It multiplies rapidly. It attacks the red blood corpuscles and this makes one very weak indeed. It can also cause death. Many patients suffer from recurrent malaria attacks for years after the first attack.
  • Typical symptoms:
  • severe headaches;
  • bouts of shivering;
  • reddish-brown urine;
  • a high fever and heavy sweating.
  • Treatment:

The patient is taken to hospital immediately, and the area is very carefully inspected for more cases of the disease. If there are many other cases in the same area, one has to look for the mosquitoes’ breeding-place and once it has been found, it must be sprayed with insecticide. The patients’ homes are also fumigated.

  • Prevention:

Activity 1:

To find out more about preventative measures in the prevention of malaria

[lo 1.6]

Tuberculosis (TB)

  • Origin and nature: Tuberculosis (TB) is a very serious, contagious disease that occurs particularly in mines and in areas where people live very close together and where the standard of hygiene is low. It can also be connected to poverty, and it is much more prevalent where people who are vulnerable to this disease do not have enough money to buy sufficient nourishing food.

Are people in your immediate environment exposed to such hazards? Have a group discussion on this issue.

The human body weakens and becomes highly susceptible to diseases such as TB. Often many people from the same area have the same disease, and then we say there is an epidemic of that particular disease. TB germs can spread very swiftly. For example, if someone who is incubating the disease coughs near other people, he or she could infect them quite easily.

  • Typical symptoms:A TB patient:
  • coughs a lot;
  • often complains of a tight chest;
  • has a very poor appetite and eats very little;
  • regularly has a high temperature and perspires a lot at night;
  • loses a lot of weight;
  • has swollen glands.
  • Treatment:

TB patients take tablets as medication. The disease can be cured on condition that the patient takes the tablets regularly as prescribed and continues to do so even when the symptoms have already disappeared.

  • Prevention:

A healthy, nourishing daily diet and good sanitary habits are necessary. Babies should be vaccinated against TB so that their bodies can develop resistance to the disease.

Cholera

  • Origin and nature:This extremely serious disease usually occurs in hot, humid conditions, such as those that are found in the subtropical areas along the east coast of our country. It occurs in areas where there is no fresh running water, tap water or proper sewerage systems (in densely-populated areas and where there are poor sanitary conditions). In such an area human sewage often lands up in streams and dams, and causes contamination of the water.

Questions & Answers

how can chip be made from sand
Eke Reply
is this allso about nanoscale material
Almas
are nano particles real
Missy Reply
yeah
Joseph
Hello, if I study Physics teacher in bachelor, can I study Nanotechnology in master?
Lale Reply
no can't
Lohitha
where is the latest information on a no technology how can I find it
William
currently
William
where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
has a lot of application modern world
Kamaluddeen
yes
narayan
what is variations in raman spectra for nanomaterials
Jyoti Reply
ya I also want to know the raman spectra
Bhagvanji
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
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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