MICROBIOLOGYPRESENTATION

Prepared by: Balbeer Singh Reg # 1248126 Bio-Science 1 (A) SZABIST, Karachi

What is Dengue Fever ?

Dengue fever is a disease caused by one of a number of Viruses that are carried by mosquitoes (Vector). These Mosquitoes then transmit the virus to humans. (Host)

The word “Host” means an animal including a human being that can be infected with a particular disease.

The word “Vector” means an organism that can carry a particular disease-causing agent.

The Virus that cause Dengue fever is called an Abrovirus which stands for “Arthropod-Borne Virus”.

STRUCTURE OF ARBOVIRUS

Types Of Arboviruses

TogaviridaeFlaviviridae

Bunyaviridae

Reoviridae

TRANSMISSION

How does an Mosquito become a dengue vector?

After a mosquito feeds on the blood of someone infected with a dengue virus, that mosquito become a dengue vector .

Once the virus enters the mosquito’s system in the blood meal, the virus spreads through the mosquito’s body over a period of eight to twelve days.

After this period the infected mosquito can transmit the dengue virus to another person while feeding.

Once infected with dengue, the mosquito will remain infected with the virus for its entire life and can continue transmitting the dengue virus to healthy people.

SYMPTOMS

DIAGNOSIS

Exams and TestsTests that may be done to diagnose

this condition include: Antibody titer for dengue virus

types Complete blood count (CBC) Polymerase chain reaction (PCR)

test for dengue virus types

TREATMENT

There is no specific treatment for dengue.

At best, best rest, fluid and medications to reduce fever can be administered.

Anticoagulants, such as Aspirin should be avoided.

Severe bleeding sometimes be controlled with transfusion of packed red blood cells or platelets.

PRECAUTIONS

When you are in a area with mosquitoes, be sure to wear long trousers, long sleeved shirts and socks.

Use a mosquito net when you go to sleep.

Try to avoid being outside at dawn. Remove stagnant water in your

homes / premises.