Migraine

                                                                            Migraine

Introduction:-

                          Migraine is a chronic neurological disorder characterized by recurrent moderate to severe headaches often in association with a number of autonomic nervous system symptoms. The word derives from the Greek (hemikrania), "pain on one side of the head from  (hemi-), "half", and  (kranion), "skull" Typically the headache is unilateral (affecting one half of the head) and pulsating in nature, lasting from 2 to 72 hours 

Definition:-

                               A migraine headache can cause intense throbbing or a pulsing sensation in one area of the head and is commonly accompanied by nausea, vomiting, and extreme sensitivity to light and sound. Migraine attacks can cause significant pain for hours to days and be so severe that all you can think about is finding a dark, quiet place to lie down. Some migraines are preceded or accompanied by sensory warning symptoms (aura), such as flashes of light, blind spots, or tingling in your arm or leg.

Dengue fever

       Dengue Fever

What is Dengue fever:-

Dengue fever also known as breakbone fever, is an infectious tropical disease caused by the dengue virus.  And this virus is transmitted by mosquitoes.

Dengue goes by other names, including "breakbone" or "dandy fever."

 Dengue (pronounced DENgee) fever is a painful, debilitating mosquito-borne disease caused by any one of four closely related dengue viruses. These viruses are related to the viruses that cause West Nile infection and  yellow fever.

Dengue virus has been recognised since the latter part of the 18th century ascausing epidemics in tropical and subtropical parts throughout the world.Dengue was first recognised in Townsville late in the 19th century and early in the 20th century. Outbreaks occurred in an area from the coast of Western Australia to the Northern Territory and down through high rainfall areas of Queensland and New South Wales. At that time Aedes aegypti mosquitoes were widely distributed in northern Australia and occurred as far south as the Victorian border in eastern Australia and south of Perth in Western Australia. By the 1970s Aedes aegypti were restricted to a small area of northern Queensland. Epidemic dengue returned to north Queensland in 1981–82. Other outbreaks occurred there in the 1990s, a time when Aedes aegypti mosquitoes were spreading westwards from Queensland to the Northern Territory border and towards the New South Wales border.

Dengue fever virus (DENV) is an RNA VIRUS of the family Flaviviridae; genus Flavivirus. Other members of the same genus include yellow fever virus, West Nile virus, St. Louis encephalitis virus, Japanese encephalitis virus, tick-borne encephalitis virus, Kyasanur forest disease virus, and Omsk hemorrhagic fever virus.Most are transmitted by arthropods(mosquitoes or ticks), and are therefore also referred to as arboviruses (arthropod-borne viruses).