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Thursday, 9 June 2011

Viral Fever

                                                                            Viral Fever



Viral fever refers to a broad specrum of conditions where viral infections are associated with elevation of body terms, any fever caused as a result of viral infection is a viral fever. These Viral infections may show generalised symptoms, but may target specific organs. The course and duration of the fever does not follow any set of pattern and is frequently accompanied by, though not always, by all of them, generalised body ache, runing nose, cough, shivering, skin rash and irritability. VIRAL infections may affect any age group, and are seen worldwide. They require only symptomatic treatment. Some are highly contagious, but some can progress rapidly leading to death.

 The cause: Most viral infections are spread by the intake of contaminated water or food, or by direct contact. The infectionns then spread locally and, thereafter, enters into the body stream or lymph channels. Some of the viral infections can be transmitted sexually or by direct inoculation into the blood stream. The duration of the disease is usually a consequence of the virus multiplying at the specific site.
 The symptoms: Once the virus enters the body, there is an incubation period when the virus multiplies to a level high enough to cause infection. This is followed by a phase of fatigue and body and muscle aches that may lead to the onset of fever. The fever may low grade or high grade. Inflamation of the throat, a runing nose, nasal congestion, headache, redness of the eyes, cough, muscle and joint pains and a skin rash could be present. Fatigue and body pain could be disproportionate to the level of fever, and lymph glands and cough may persist for a few weeks. Sometimes pneumonia, vomiting and diarrhoea, jaundice or arthristis (joint swelling) may complicate the initial viral fever. Some viral fevers are spread by insects, for eg. arbovirus, and can cause bleeding from the skin and several other internal organs and can be fatal.

Chikungunya fever
Chikungunya fever is a viral disease transmitted to humans by the bite of infected mosquitoes. Chikungunya virus(CHIKV) is a member of the genus Alphavirus, in the family Togaveridae. Aedes aegypti (the yellow fever mosquito), a household cotainer breeder and aggresive daytime biter which is attracted to humans, is the primary vector vector of CHIKV infections can cause a debiliting illness, most often charecterised by fever, headache, fatigue, nausea, vomiting, muscle, rash, and joint pain. The term 'chikungunya' is Swahili for 'that which bends up'. The incubation period (time from infection to illness) can be 2-12 days, but is usually 3-7 days. Treatment is symptomatic-rest, fluids, and medicines that may relieve symptoms of fever and aching.
 Prevention: The best  way to avoid CHIKV infection is to prevent mosquito bites. Infected persons should be further protected from mosquito bites so that they can't contribute to the transmission cycle. Get rid of mosquito breeding sites by empting standing water from flower pots, buckets and barrels.

 Dengue hemorrhagic feverDengue hemorrhagic fever is a severe, potential fatal infection that occurs when someone with immunity to one type of Dengue Virus is infected by a different type. It is spread by certain mosquitoes (Aedes aegypti) that bite priparily during the day.
 Four different Dengue viruses have been implicated in both Dengue fever and Dengue hemorrhagic fever. Dengue contracts a different Dengue virus after previous infection(s) by another type. Prior immunity to a different Dengue virus is important in the production of this severe disease. World-wide, more than 100 million cases of dengue fever occur every year. A small percenr of these develop into Dengue hemorrhagic fever.

 The Zika virus It is spread by mosquitoes, it produces an itchy rash, pinkey, joint pain and fever. Since its discovery 60 years ago in an ill monkey in the Zika forest in Uganda, it has cause rare cases and outbreaks in Africa and Southeast Asia. While Zika does not seem to be fatal, it is posing unusual challenges to the specific treatment or vaccine. There is no specific treatment or vaccine a big fuss in Micronesia.

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