25231 - Chikungunya DR.I.SELVARAJ IRMS B.Sc., M.B.B.S.,(M.D...

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Chikungunya DR.I.SELVARAJ IRMS Sr.D.M.O ( SELECTION GRADE) INDIAN RAILWAYS
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Chikungunya is a relatively rare form of viral fever ( "debilitating non- fatal viral illness." ) caused by an alphavirus that is spread by mosquito bites from the Aedes aegypti mosquito.
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EPIDEMIOLOGY
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Chikungunya was first described in  Tanzania, Africa in  1952.  An outbreak of chikungunya was discovered  in Port Klang  in Malaysia in 1999  affecting 27 people.  In  February 2005 , an outbreak was recorded on the  French island of Réunion  in the Indian Ocean. As of  May  18, 2006, 258,000  residents have been hit by the virus in  the past year (out of a population of about 777,000). 219  official deaths have been associated with chikungunya.  In neighboring  Mauritius,   3,500 islanders  have been hit in  2005 . There have also been cases in  Madagascar, Mayotte and  the Seychelles.
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The name is derived from the   Makonde word  meaning  "that  which bends up"   in reference to the stooped posture  developed as a result of the arthritic symptoms of the  disease.   The disease was   first described by Marion Robinson and  W.H.R. Lumsden in 1955,   following an outbreak on the   Makonde Plateau,   along the border between Tanganyika  and Mozambique, in 1952.   Chikungunya is closely related to   O'nyong'nyong virus.  Chikungunya is not considered to be fatal. However in  2005-2006 200 deaths   have been associated   with  chikungunya   on Réunion island.
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—  first reported in  India in 1963  — had returned after a three-decade  dormancy and 121 districts across seven States were affected by it  with a total of 9,74,541 suspected cases. Of the 10,611 samples sent  to laboratories, 992 tested positive.  In 2006 , there was a  big outbreak in the Andhra Pradesh  state in India.  Nearly 200,000 people were affected by this disease in the districts of  Praksham and Nellore  in this state.  In Bangalore , the state capital of Karnataka (India), there seems to be  an  outbreak of CHIK now (May 2006)  with arthralgia/arthritis, rashes.  In the 
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25231 - Chikungunya DR.I.SELVARAJ IRMS B.Sc., M.B.B.S.,(M.D...

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