Dengue And Aedes Mosquito

INTRODUCTION

Dengue fever is an arboviral disease complex which include :
        a. Dengue Fever
        b. Dengue haemorrhagic
        c. Dengue shock syndrome

TRANSMISSION OF DENGUE VIRUS

• Virus transmitted to human in mosquito saliva
• Virus replicates in target organs
• Virus infects white blood cells and lymphatic tissues
• Virus released and circulates in blood
• Second mosquito ingests virus with blood
• Virus replicates in mosquito midgut and other organs, infects salivary glands
• Virus replicates in salivary glands

SIGN AND SYMPTOM DENGUE FEVER

1. High fever
2. Severe headache
3. Pain behind the eyes
4. Muscle and joint feel pain
5. Rash
6. Skin heamorrhagic such as a positive tourniquest test

SIGN AND SYMPTOM DENGUE HEAMORRHAGIC FEVER

1. High fever
2. Heamorrhagic phenomena
3. Hepatomegaly
4. Often circulatory failure

DIFFERENT OF AEDES MOSQUITOES

1. Aedes mosquito has 2 type :

• Aedes Aegypti 
• Aedes Albopictus

AEDES AEGYPTI

• There are 2 white stripes shaped like a sail and a pair of white stripes in the middle of the mesothorox (rear center)
• Breeding places in the house and likes to bite people who were in the house
• Very dengerous because it can carried the virus that causes dengue haemorrhagic fever (DHF) in the body. It can cause casualty.

AEDES ALBOPICTUS

• There are 1 white stripe shaped like a sail in the middle of the mesothorox (rear center)
• Usually spawn and reproduce outside the house. Its like to relax and often bite their victim out of the house
• Its carrying the virus that causes dengue fever is not bleeding inside body.

LIFE CYCLE OF AEDES MOSQUITOES

 

EGGS

• Exposure to high humidity at the water line for 2-3 days is required for larvae to hatch from their eggs.
• They are resistant to desiccation and can survive for upward of six or more month
• Aedes mosquitoes can lay about 60-70 eggs
• The eggs will hatch within a day or perhaps even within minutes 

LARVAE

• The larvae stages take only 5-10 days for development.

PUPAE

  

• Transformation from the larvae stage to the pupae stage generally take 2-3 days
• Under the most favorable climatic and environmental condition, the entire immature or aquatic cycle (i.e from egg to adults) can occur in as little as 10 days.

ADULTS

• The life span for adults is between 2 weeks to a month
• It can fly in range 50-100 metres

AS A CONCLUSION