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Dengue Fever and virus

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Shae Harrison

on 9 August 2013

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Transcript of Dengue Fever and virus

Dengue Fever &
Dengue Virus

What is Dengue Fever?
Dengue fever is a tropical disease
(also known as breakbone fever), is an
infectious tropical disease caused by the
dengue virus.
Watch the video...
Map of Where Dengue Fever Spread During Epidemics
Dengue fever is caused by any one of four dengue viruses spread by mosquitoes that thrive in and near human lodgings. When a mosquito bites a person infected with a dengue virus, the virus enters the mosquito. When the infected mosquito then bites another person, the virus enters that person's bloodstream and that person becomes contaminated with the disease.
How does it spread?
Dengue virus is a virus that passes through the blood, so, like any other blood disease, it can be passed through the sharing of blood e.g. organ transfusions, blood donations etc. But, Dengue virus is primarily transmitted by mosquitoes, particularly A.aegypti (a specific type of mosquito). When a mosquito carrying dengue virus bites a person, the virus enters the skin together with the mosquito's saliva. It binds to and enters white blood cells, and reproduces inside the cells while they move throughout the body. The white blood cells respond by producing a number of signalling proteins, which are responsible for many of the symptoms.
Some of the symptoms that occur when you have the Dengue virus are things like,
a fever,
many flu-like symptoms
severe pains.
If someone were to have a severe infection, the rate of the virus spreading inside the body is greatly increased, and many more organs (e.g. the liver and bone marrow) can be affected.
Fluid in your bloodstream leaks through the wall of small blood vessels into body cavities due to endothelial dysfunction (the swelling of a blood vessel). Because of this, less blood circulates in the blood vessels, and the blood pressure becomes so low that it cannot supply enough blood to vital organs.

In some cases people with dengue fever don't have symptoms; but most have mild symptoms that appear anywhere from 4 days to 2 weeks after being bitten by an infected mosquito. Symptoms usually last for 2 to 7 days. Once people have had the fever, they become immune to that particular type of the virus (although they can still be infected by any of the other three types e.g. yellow fever).
Because dengue fever is caused by a virus, there is no specific medicine to treat it. For typical dengue fever, the treatment is normally to help with relief of the symptoms. Rest and fluid intake for adequate hydration is important. Panadol (or any other pain relief) and anti-inflammatory’s should only be taken if prescribed by a doctor because of the possibility of worsening bleeding complications. Codeine can be taken for headaches and muscle pain.

If the case is serious though, treatments such as medical care by physicians and nurses experienced with the effects and progression of the disease need to be taken. The most important thing is maintenance of the patient's body fluid volume is critical to severe dengue care.
A vaccine has been developed to prevent dengue fever but it is still under trial. It is not yet available in the market. Scientific progress is likely to help in prevention of dengue fever by vaccination in the years to come.
It does seem that the places that the virus hit, has a sort of pattern. The virus has mainly hit in places that can reach very high, tropical, temperatures. The Dengue fever is a tropical virus, so, this is probably why it hit in these certain places.
The more serious cases have hit in the countries and continents that hit higher temps. e.g. South America and Florida and South Africa. The Islands and the top of Australia has had the virus yet thier cases have not been so widely spread and/or serious
What if not treated?
In normal cases of dengue fever, it will usually simmer down by itself and then go away. The pain can sometimes get too serious to handle and that is usually when medication is needed.

In rare cases, dengue fever can lead to more serious forms of the disease. These conditions, called dengue haemorrhagic fever(Dengue virus) and dengue shock syndrome, can cause shock and death and need immediate medical treatment.
(as seen on past slide)

What could be done to reduce the effect Dengue Disease has on people?
Some ways to reduce the effects of Dengue fever are
-Spreading information about Dengue Fever
-Informing people about ways to prevent Dengue fever
-And setting up programmes for people with Dengue fever and tell them how to reduce the symptoms

All of these thing are possible to do, the ideas would just need sufficiant funding. The only way to get funding would be to spread the word and hope that people have a better understanding of the isk they are in of catching the virus.

If people new how much risk their was of catching the virus and how bad it could get, maybe their would be better treatments for the disease, and maybe their would be funding for such trials as vaccines that could fight against the virus and save a large amount of the population from being at risk.

I think that the reason not manty people know about the disease is because the people that do, don't know how dangerous it really is. This is a virus that can KILL people, at any age. It is not a targeted virus, rich, poor, young, old, no-one is safe. f the information was spread... we wouldn't have this problem.
What effect does the amount of money you or your country has, have on Dengue Fever?
Dengue fever is not a virus that targets rich or poor. It is more targeting of the environment that you live in and the temperature that you live in. The climate that you have is all that matters.

Catching the disease is not where money comes in, treatment is where the money is... literally. In places like Queensland and other wealthy countries that can catch the virus can get treatment/medication for free. The poorer countries like South Africa and South America are in most cases to poor to get hold of such medicine and are usually left to deal with the pain using herbal, homemade medicines. These homemade techniques of healing can be bad if not recomended by doctors as they can cause inflamation and/or make symptoms work.

What needs to be done worldwide to reduce the virus spreading and the effect it has?
The spreading of the disease is unfixable (unless we kill off all mosquitos, which i doubt will happen) so i think the best thing we can do would to set up special funds and charities to help spread information about Dengue fever and to help those with the virus.

The money raised by those foundations and charities could be spent by setting up wards in hospitals in targeted areas fr dengue fever specifically for treatment for Dengyue fever. This could mean less deaths as it would be easier to get to hospitals and get treatments.

The funds raised could also be used to buy and give out treatments (under nuse supervision) to those with the virus so that they would not have to suffer the pains.
Things like free checks for the virus could also be done to prevent serious cases.
(n.d.). Retrieved July 30, 2013, from Centres fpr Disease Conrtol and Prevention (CDC).

Dengue fever. (2013, 7/ 17/). Retrieved 7/ 30/, 2013, from Wikipedia: http://en.wikipedia.org/wiki/Dengue_fever

Dengue Fever Symptoms, Causes, Treatments. (n.d.). Retrieved 7 31, 2013, from Medicine Net.com: http://www.medicinenet.com/dengue_fever/page4.htm#what_is_the_treatment_for_dengue_fever

Infectious Diseases Related To Travel (Vol. Chapter 3). (n.d.).

for videos-http//www.youtube.com/watch?v=0PUsdv1kDTc
Thanks for watching
Dance for Dengue Fever
Performed by inmates...
Full transcript