81. BBC NEWS | Health | Medical Notes | Encephalitis Insectborne diseases are spreading around the world - find out about some of the most common infections. http://news.bbc.co.uk/2/hi/health/medical_notes/460907.stm

NEWS SPORT WEATHER WORLD SERVICE ... A-Z INDEX SEARCH You are in: Health: Medical notes News Front Page Africa ... Programmes SERVICES Daily E-mail News Ticker Mobile/PDAs Text Only ... Help EDITIONS Change to UK Wednesday, 29 September, 1999, 15:30 GMT 16:30 UK Encephalitis Encephalitis - inflammation of the brain - is most commonly caused by a viral infection, which can be contracted through insect bites, food, drink or skin contact. Once the virus is in the bloodstream it localises in the brain, which is swamped with white blood cells attempting to fight of the infection. This causes the swelling and can lead to nerve and brain damage, and bleeding within the brain. St Louis Encephalitis Named after the town where it was first classified in 1933, St Louis encephalitis (SLE) is the most common viral encephalitis in the US. It is thought to occur naturally in birds and is spread by mosquitoes. It produces flu-like symptoms such as fever, headaches and lethargy, and in severe cases high fever and convulsions. The elderly are most at risk from the virus, with 30% of those infected dying as a result. However, most people who pick it up show no symptoms.

82. Western Equine Encephalitis Facts Features cause, symptoms, risk factors, diagnosis, treatment, and prevention. http://www.astdhpphe.org/infect/wee.html

Western Equine Encephalitis Western equine encephalitis is a viral disease that is spread by infected mosquitoes. It is one of several mosquito-borne virus diseases that can affect the central nervous system and cause severe complications and death. Western equine encephalitis is found mainly in the plains regions of the western and central United States. There is no specific treatment for western equine encephalitis. Prevention centers on controlling mosquitoes and avoiding mosquito bites. What is western equine encephalitis? Western equine encephalitis is a disease that is spread to horses and humans by infected mosquitoes. It is one of a group of mosquito-borne virus diseases that can affect the central nervous system and cause severe complications and even death. Other similar diseases are eastern equine encephalitis, St. Louis encephalitis, and LaCrosse encephalitis. What is the infectious agent that causes western equine encephalitis? Western equine encephalitis is caused by the western equine encephalitis virus, an arbovirus. Arbovirus is short for ar thropod- bo rne virus . Arboviruses are a large group of viruses that are spread by certain invertebrate animals, mainly blood-sucking insects. In the United States, arboviruses are usually spread by infected mosquitoes. Birds are often the source of infection for mosquitoes, which can sometimes spread the infection to horses, other animals, and, in rare cases, people.

83. BBC NEWS | Health | Medical Notes | Japanese Encephalitis Japanese encephalitis is a disease caused by a virus transmitted by mosquitoes in severe cases it leads to a deadly inflammation of the brain. http://news.bbc.co.uk/2/hi/health/medical_notes/307709.stm

NEWS SPORT WEATHER WORLD SERVICE ... A-Z INDEX SEARCH You are in: Health: Medical notes News Front Page Africa ... Programmes SERVICES Daily E-mail News Ticker Mobile/PDAs Text Only ... Help EDITIONS Change to UK Tuesday, 30 March, 1999, 11:32 GMT 12:32 UK Japanese encephalitis The disease is spread by mosquitoes The deadly disease Japanese Encephalitis occurs mainly in the rural areas of China and Korea, but is also found in most countries of South and East Asia. Japanese encephalitis is a viral disease spread by mosquitoes, which transfer the virus from infected animals - usually pigs and wading birds - to humans. What causes the disease? Japanese encephalitis is caused by a Flaviviridae virus, which is transmitted by mosquitoes. Transmission of the disease is most likely during the summer months in temperate areas and during the rainy season and early dry season in tropical areas, when the mosquito populations are the highest. What are the symptoms? Most people who are infected show only mild symptoms or no symptoms at all. However, at advanced stages, the disease may be fatal.

84. Encephalitis Primary encephalitis. This occurs when a virus directly invades your brain and It can happen to people at any time of the year (sporadic encephalitis), http://www.cnn.com/HEALTH/library/DS/00226.html

International Edition MEMBER SERVICES The Web CNN.com Home Page World U.S. Weather ... Autos SERVICES Video E-mail Newsletters Your E-mail Alerts RSS ... Contact Us SEARCH Web CNN.com In association with: INFECTIOUS DISEASE Viral Illnesses Chickenpox Viral gastroenteritis Shingles Meningitis ... Hand-foot-and-mouth disease INFORMATION CENTERS: Pick a category Health Centers Family Health Men's Health Women's Health Children's Health Seniors' Health Working Life Pain Management Condition Centers Immune System Allergy Alzheimer's Arthritis Respiratory System Cancer Endocrine System Digestive System Heart and Blood Infectious Disease Mental Health Note: All links within content go to MayoClinic.com Diseases and Conditions Encephalitis From MayoClinic.com Special to CNN.com Overview "Encephalitis" means "inflammation of the brain," but it usually refers to brain inflammation caused by a virus. This severe and potentially life-threatening disease is rare. Seeing your doctor and receiving timely treatment is important because the course of the disease is unpredictable. Signs and symptoms Drowsiness Confusion and disorientation Seizures Sudden fever Severe headache Nausea and vomiting Tremor or convulsions Bulging in the soft spots (fontanels) of the skull in infants Urgent signs and symptoms may include altered levels of consciousness. In infants, the key signs are a stiff neck and a bulging in the soft spots of the skull. In older children, watch for severe headaches, lethargy, confusion and sensitivity to light. In adults, mental disturbances may be more prominent.

85. CNN - Bird Migration Could Spread Rare Encephalitis Strain - September 29, 1999 The investigation into a rare strain of encephalitis that has killed five people in The St. Louis strain of encephalitis was originally blamed for the http://www.cnn.com/HEALTH/9909/29/west.nile.virus/

MAIN PAGE WORLD U.S. LOCAL ... daily almanac MULTIMEDIA: video video archive audio multimedia showcase ... more services E-MAIL: Subscribe to one of our news e-mail lists. Enter your address: document.write(' '); Or: Get a free e-mail account E-MAIL DISCUSSION: message boards chat feedback CNN WEB SITES: AsiaNow Svenska Norge Danmark ... Italian FASTER ACCESS: europe japan TIME INC. SITES: Go To ... Time.com People Money Fortune EW CNN NETWORKS: more networks transcripts SITE INFO: help contents search ad info ... jobs WEB SERVICES: health > story page Bird migration could spread rare encephalitis strain The deaths of 20 Bronx Zoo birds were caused by the West Nile virus September 29, 1999 Web posted at: 2:20 p.m. EDT (1820 GMT) In this story: 43 people infected in New York Symptoms, risk Mosquito-borne disease Ticks tested, too ... RELATED STORIES, SITES NEW YORK (CNN) As birds head south for the winter, are they bringing a potentially deadly virus with them? The investigation into a rare strain of encephalitis that has killed five people in New York is growing, with experts testing dead birds along the East Coast to find out whether the mosquito-borne virus has spread. The West Nile virus, seen before in Africa, Asia, and Europe, but never before recorded in the Western Hemisphere, could have come to the United States from an infected bird smuggled into the country.

86. Encephalitis encephalitis is an inflammation (irritation and swelling) of the brain, usually caused by infections. See also . http://www.healthcentral.com/ency/408/001415.html

Dr. Dean TV Specials Newsletters Home ... Health Tools Search Choose a Health Topic * All Health Topics * Acne Addictions AIDS/HIV Alcohol Abuse Allergies Alternative Medicine Alzheimer's Arthritis Asthma Attention Deficit Disorder (ADHD) Backache Bipolar Affective Disorder Birth Control Blood Blood Pressure Bone/Joint/Tendon Bowel Brain Breast cancer Cancer Cerebral Palsy Cholesterol Cramps Crohn's Disease Cysts Dental/Oral Depression Diabetes Diet, Fitness, Looks Disabled/Special Needs Drug Abuse Ear/Nose/Throat Eating/Appetite Eczema Encephalitis Eye/Vision Fatigue Fever Flu Food Poisoning Foot Gallbladder Gastrointestinal Genetic/Congenital GERD/Heartburn Hair Loss Hair/Scalp Headache Hearing Heart Disease, Stroke Heat/Sunstroke Hepatitis Hernia Herpes High Blood Pressure Hormonal Immune Disorders Immunizations/Vaccines Impotence Incontinence/Bladder Infections Injuries Kidney/Urinary Kids Learning Disabilities Liver Lung Cancer Men Menopause, Postmenopause Migraine Mobility/Balance Multiple Sclerosis Muscle Neural Nosebleeds Pain Parasites Pituitary PMS Pregnancy Prostate Cancer Prostate Disorders Psoriasis Psychological Raynaud's Disease Respiratory Reye Syndrome Rheumatoid Arthritis Schizophrenia Seniors Sensory Sexually Transmitted Disease Skin Sleep Speech Disorders Spinal Thyroid Trauma Weight Loss Women Yeast Infections Home Health Encyclopedia Encephalitis Encephalitis Injury Disease Nutrition Poison ... Prevention Encephalitis Definition: Encephalitis is an inflammation (irritation and swelling) of the brain, usually caused by infections. See also

87. Herpes Encephalitis bullet, Adult HSV encephalitis can reflect primary infection, bullet, It has been suggested that up to 20% of HSV encephalitis cases may take this http://neuroland.com/id/herpes_ence.htm

Information for health care professionals click on brain to return to index page Neuroland Search site Neuro Med Neuro Note Texas Dr ... YSL Herpes Encephalitis Overview caused by Herpes simplex virus (HSV-1) Two thousand cases occur each year in the United States Adult HSV encephalitis can reflect primary infection, reinfection, or reactivation of latent agent Can affect any age group, but most common in those under 20 and over 40. Exposure to infected saliva or respiratory secretions, ascend along the olfactory nerve into the limbic lobe, or from reactivation of virus from Trigeminal ganglion 90% of patients show evidence of temporal lobe involvement Symptoms Followed by behavioral changes, seizures (40%), hemiparesis (33%), and depressed level of consciousness. Atypical cases include patients without focal features, and patients who show a slowly progressive course. It has been suggested that up to 20% of HSV encephalitis cases may take this atypical form. This has led to the recommendation that CSF PCR studies for HSV (both types 1 and 2) be carried out in any febrile, encephalopathic patient with an unclear etiology for their syndrome. Tests EEG often abnormal: Diffuse slowing or Uni or bilateral temporal periodic discharges or Slow wave complexes at 2-3/second interval.

88. Virtual Hospital: Infectious Diseases Of The Central Nervous System: Parenchymal Herpes simplex encephalitis arises sporadically and does not necessarily occur Clinically, herpes encephalitis is characterized by rapid onset of fever, http://www.vh.org/adult/provider/pathology/CNSInfDisR2/Text/PInf.VHS.html

Infectious Diseases of the Central Nervous System Parenchymal Infections: Herpes Simplex Gary Baumbach, M.D., Department of Pathology, University of Iowa College of Medicine Peer Review Status: Internally Peer Reviewed Herpes simplex, a DNA virus, is carried by a majority of the human population. The virus is harbored in the trigeminal ganglia, and produces lesions in the oral mucosa when activated by stress. Herpes simplex encephalitis arises sporadically and does not necessarily occur in people with a history of oral lesions. Clinically, herpes encephalitis is characterized by rapid onset of fever, chills, restlessness, and signs of increased intracranial pressure. The mortality rate of herpes encephalitis is at least 25%. This gross photo shows the characteristic gross appearance of herpes encephalitis - edema, hemorrhages and necrosis confined primarily to the temporal lobes. The degree of edema is evidenced by the medial displacement of the uncal gyri. The involvement may be bilateral as shown here, or may be unilateral as shown on the next slide. This section of brain shows the late sequelae in a case of unilateral herpes encephalitis. The right temporal lobe is atrophic and ragged. Also, note that the disease process extended into the adjacent cingulate gyrus. In the acute stages, microscopic examination reveals vascular destruction with infiltrates of neutrophils and lymphocytes as shown on this slide

89. MVE & KUN This page is devoted to Murray Valley encephalitis and Kunjin encephalitis, the disease and its prevention. http://medent.usyd.edu.au/fact/murray valley encephalitis and kunjin.htm

Department of Medical Entomology Overview Natural History Symptoms Laboratory Diagnosis ... bottom of page Overview Natural History The term 'Australian encephalitis' (AE) has been used to indicate encephalitis induced by infection with either Murray Valley encephalitis (MVE) and/or Kunjin (KUN) virus. However, they are different viruses, with slightly different clinical symptoms and so the infections should be named after the causative virus (i.e. MVE disease/KUN disease). The first reports of disease that might be attributed to MVE infection in humans in Australia occurred in southeastern Australia in 1917, 1918 and 1925 (114, 67 and 10 cases respectively), and were described under the title of "Australian 'X' disease". A virus, designated Murray Valley encephalitis virus, was later isolated from fatal cases in an epidemic in 1951, when there were 48 cases (and 19 deaths), and this virus has been accepted as the causal agent of the earlier Australian 'X' disease outbreaks. The next major outbreak occurred in 1974; although 42 cases were recorded in the southeast (primarily in the Murray Valley region), human infections occurred in all mainland states, with a national total of 58 cases and 13 fatalities. Serological studies indicated that some non-fatal cases were due to KUN virus infection, although only MVE virus was associated with fatal cases. Since 1974, cases have occurred sporadically in northern Australia and in the northwest of WA in particular, but there have been no cases of MVE recorded in southeastern Australia. However, in 1984 there was a case of non-fatal KUN encephalitis in northeastern Victoria and KUN infections were reported from two other areas in the Murray Valley, and in 1991 there were two KUN infections reported in southwestern NSW.

90. Encephalitis And Meningitis - Health And Medical Information Produced By Doctors Doctorproduced health and medical information written for you to make informed decisions about your health concerns. http://www.medicinenet.com/encephalitis_and_meningitis/article.htm

document.writeln(''); MedicineNet Home > Encephalitis and Meningitis search help Printer-Friendly Format FREE Newsletters Email to a Friend ... Next Encephalitis and Meningitis What is encephalitis? What are symptoms of encephalitis? What is meningitis? What are symptoms of meningitis? ... Are there vaccines against meningitis? What is encephalitis? Encephalitis is an inflammation of the brain. There are many types of encephalitis, most of which are caused by infection with viruses. What are symptoms of encephalitis? Symptoms of encephalitis include sudden fever, headache , vomiting, abnormal visual sensitivity to light, stiff neck and back, confusion, drowsiness, clumsiness, unsteady gait, and irritability. Symptoms that require emergency treatment include loss of consciousness, poor responsiveness, seizures, muscle weakness, sudden severe dementia , memory loss, withdrawal from social interaction, and impaired judgement. Anyone experiencing symptoms of encephalitis should see a doctor immediately. What is meningitis?

91. West Nile Virus Causes, Symptoms, Diagnosis And Treatment On MedicineNet.com West Nile encephalitis is an infection of the brain that is caused by a virus West Nile virus also is called West Nile fever or West Nile encephalitis. http://www.medicinenet.com/west_nile_encephalitis/article.htm

document.writeln(''); MedicineNet Home > West Nile Encephalitis search help Printer-Friendly Format FREE Newsletters Email to a Friend ... Next West Nile Virus What is West Nile virus? Where did the West Nile virus come from? How do people get West Nile virus? How do mosquitoes get infected with the West Nile virus? ... West Nile Virus At A Glance What is West Nile virus? "Encephalitis" means inflammation of the brain. One of the causes of encephalitis is viral and bacterial infections, including viral infections transmitted by mosquitoes. West Nile encephalitis is an infection of the brain that is caused by a virus known as the West Nile virus. This virus was first identified in Uganda in 1937. It is commonly found in Africa, West Asia, and the Middle East. West Nile virus had not been previously reported in the U.S. prior to an outbreak in New York in September, 1999. No reliable estimates are available for the number of cases that occur internationally. West Nile virus also is called West Nile fever or West Nile encephalitis. Where did the West Nile virus come from?

92. Viral Encephalitis Viral encephalitis is inflammation of the brain caused by a virus. The major risk is permanent brain damage. Children aged one year or less and adults aged http://www.betterhealth.vic.gov.au/bhcv2/bhcarticles.nsf/pages/Viral_encephaliti

93. Encephalitis Detailed information on the most common types of encephalitis, including Japanese encephalitis, tickborne encephalitis, and arbovirus encephalitis. http://www.healthsystem.virginia.edu/uvahealth/adult_travel/encephal.cfm

[ Skip Navigation ] Health System Home For Health Answers Healthcare Professionals ... Advanced Search Health System Search Search for Information People UVa Home Health System News Health System Events (all) Health System Publications ... Making a Gift Topics All About Cancer Blood Disorders Bone Disorders Breast Health Cancer Cardiovascular Disease Dermatology Diabetes Digestive Disorders Endocrinology Environmental Medicine Eye Care Glossary Gynecological Health Infectious Diseases Kidney Disease Men's Health Mental Health Nervous System Disorders Non-Trauma Emergency Oral Health Orthopaedics Otolaryngology Pathology Pediatrics, General Health Prostate Health Radiology Respiratory Disorders Skin Cancer Surgical Care Urology Women's Health UVa Health Topics A to Z FIND A DOCTOR Center for Global Health MAKE AN APPOINTMENT CALENDAR OF EVENTS ... WHY CHOOSE UVA Search This Site Encephalitis What is encephalitis? Encephalitis is an inflammation caused by a viral infection. The specific viruses involved may vary and although exposure to viruses can occur through insect bites, food or drink, or skin contact, travelers are most at risk to exposure from insect bites. In rural areas, arboviruses that are carried by mosquitoes or ticks are the most common cause of infection. While there have been outbreaks in recent years in the United States of several forms of encephalitis, such as West Nile encephalitis and St. Louis encephalitis, travelers abroad are most at risk for Japanese encephalitis and tickborne encephalitis.

94. LaCrosse Encephalitis - Minnesota Dept. Of Health LaCrosse encephalitis Basics LaCrosse encephalitis information. Including transmission, prevention, signs and symptoms, and answers to frequently asked http://www.health.state.mn.us/divs/idepc/diseases/lacencephalitis/

dqmcodebase = "http://www.health.state.mn.us/script/" LaCrosse Encephalitis LaCrosse Encephalitis Home Basics Statistics Mosquito-Transmitted Diseases Mosquito-Transmitted Diseases Home Diseases West Nile Virus (WNV) LaCrosse Encephalitis (LAC) ... For Health Professionals More From MDH Infectious Diseases A-Z Infectious Diseases by Category External Links Metropolitan Mosquito Control District CDC: Division of Vector-Borne Infectious Diseases University of Minnesota College of Veterinary Medicine LaCrosse Encephalitis (LAC) LaCrosse encephalitis is a viral illness that is transmitted to people through the bite of an infected mosquito. LaCrosse Encephalitis Basics LaCrosse encephalitis information. Including transmission, prevention, signs and symptoms, and answers to frequently asked questions. LaCrosse Encephalitis Statistics LaCrosse encephalitis is reported every year in Minnesota. If you have questions or comments about this page, contact

95. Encephalitis Information System Information on encephalitis and Arboviruses. http://eis.ifas.ufl.edu/

96. What Is Encephalitis? Information on encephalitis and Arboviruses. encephalitis is an inflamation of the brain and spinal cord usually caused by viral infection. http://eis.ifas.ufl.edu/what.htm

What is Encephalitis? E ncephalitis is an inflamation of the brain and spinal cord usually caused by viral infection. Diseases such as rabies, polyomelitis, and herpes encephalitis are all caused by virus infections that affect the brain and spinal cord and are transmitted in a variety of ways. Arboviral encephalitis refers to similar maladies that are transmitted by arthropods, mainly mosquitoes. Although the majority of cases of arboviral encephalitis infection are asymptomatic or have only very mild symptoms, the disease can sometimes damage nerves and can cause lasting damage and even death. Symptoms include sudden fever, headache, vomiting, unusual visual sensitivity to light, stiff neck and back, confusion, drowsiness, clumsiness, difficulty walking, and irritability. A rboviral encephalitides are maintained in nature in complex life cycles involving a nonhuman primary vertebrate host and a primary arthropod vector and which usually do not include humans. Humans and domestic animals can contract the disease when the virus escapes the cycle and infects a secondary host. This can happen because of ecological or demographic changes, or due to population changes in the primary vector, host, or both. Many arboviruses that cause encephalitis have a variety of different vertebrate hosts and some are transmitted by more than one vector. T here are five major types of arboviral encephalitis in the United States: St. Louis encephalitis (SLE)

97. Questions Regarding Eastern Equine Encephalitis And Horses - FS737 Eastern equine encephalitis, commonly referred to as EEE, The overt to inapparent ratio of encephalitis in New Jersey is estimated at I overt case for http://www.rci.rutgers.edu/~insects/heee.htm

Questions Regarding Eastern Equine Encephalitis and Horses by Wayne J. Crans, Associate Research Professor in Entomology Rutgers Cooperative Extension Fact Sheet # FS737 Eastern equine encephalitis, commonly referred to as EEE, is a virus disease of wild birds that is transmitted to horses and humans by mosquitoes. The virus is found near wetland habitats along the eastern seaboard from New England to Florida. New Jersey represents a major focus for the infection with some form of documented viral activity nearly every year. Horse cases are most common in the southern half of New Jersey because the acid water swamps that produce the major mosquito vectors are especially prevalent on the southern coastal plain. The virus responsible for EEE attacks the central nervous system of its host and horses are particularly susceptible to the infection. Onset is abrupt and horse cases are almost always fatal. Symptoms include unsteadiness, erratic behavior and a marked loss of coordination. There is no effective treatment and seizures resulting in death usually occur within 48-72 hours of an animal's first indications of illness. EEE is not new to New Jersey, but the disease is poorly understood by the average horse owner. A vaccine is available, but a surprisingly high number of valuable animals go unvaccinated each year. This fact sheet has been designed to answer the most commonly asked questions regarding EEE and its potential impact on New Jersey's horse industry. For additional information on the subject, contact your County Agricultural Agent, your County Mosquito Control Agency, the New Jersey Agricultural Experiment Station and the New Jersey Department of Agriculture - Division of Animal Health.

98. Encephalitis - Wikipedia, The Free Encyclopedia EUROPEAN TICK BORNE encephalitis Travel Medicine Program European tick-borne encephalitis is the most important recognized arboviral illness in Europe. Widely scattered areas of Europe have reported cases of http://en.wikipedia.org/wiki/Encephalitis

Wikimedia needs your help in the final days of its fund drive. See our fundraising page Over US$225,000 has been donated since the drive began on 19 August. Thank you for your generosity! Encephalitis From Wikipedia, the free encyclopedia. Encephalitis Encephalitis is an acute inflammation of the brain, commonly caused by a viral infection . Sometimes, encephalitis can result from a bacterial infection, such as bacterial meningitis , or it may be a complication of other infectious diseases like rabies (viral) or syphilis (bacterial). Certain parasitic protozoal infestations, like by toxoplasma , can also cause encephalitis in people with compromised immune systems. Contents Features Aetiology Diagnosis Treatment ... edit Features Patients with encephalitis suffer from fever headache , vomiting, confusion, drowsiness and photophobia . The symptoms of encephalitis are caused by the brain's defense mechanisms activating to get rid of infection (brain swelling, small bleedings and cell death). edit Aetiology Victims are usually exposed to viruses resulting in encephalitis by insect bites or food and drink. The most frequently encountered agents are arboviruses (carried by mosquitoes or ticks ) and enteroviruses coxsackievirus poliovirus and echovirus ). Some of the less frequent agents are

99. St. Louis Encephalitis - Material Safety Data Sheets (MSDS) Material Safety Data Sheets (MSDS), regulated under Workplace Hazardous Materials Information System (WHMIS) legislation, for chemical products have been http://www.phac-aspc.gc.ca/msds-ftss/msds174e.html

Home Material Safety Data Sheets - Infectious Substances MATERIAL SAFETY DATA SHEET - INFECTIOUS SUBSTANCES SECTION I - INFECTIOUS AGENT NAME: St. Louis encephalitis SYNONYM OR CROSS REFERENCE: SEV, SELV, Mosquito-borne encephalitis, arbovirus, viral encephalitis CHARACTERISTICS: Family Flaviviridae (formerly Togaviridae), Flavivirus genus; 40-50 nm diameter, enveloped, positive sense ssRNA; Member of Japanese encephalitis (JE) antigenic complex SECTION II - HEALTH HAZARD PATHOGENICITY: Acute inflammatory disease of short duration involving brain, spinal cord and meninges; most infections are asymptomatic; severe infections marked by acute onset, headache, high fever, nausea, myalgia, and malaise, followed by meningeal signs, stupor, coma, convulsions and paralysis; children may develop urinary tract symptoms; severity increases with age, over 60 has the highest rate of acute encephalitis; fatality rate of 2-22%; HIV infection may be a risk factor; 30-50% of severe cases have prolonged convalescence. EPIDEMIOLOGY: St. Louis encephalitis occurs in Northern, Southern and Central America; cases occur in temperate latitudes in summer and early fall and are commonly limited to areas and years of high temperature and many mosquitoes

100. Encephalitis Most cases of encephalitis in the northeast occur from June through September, Because there is no cure for encephalitis, doctors can only react to http://www.lifespan.org/Services/Infectious/Enceph/default.htm

Lifespan Home Page Infectious Diseases Specific Diseases Encephalitis Topics: EEE West Nile Virus Reduce Your Risk Viral Encephalitis In the eastern United States, eastern equine encephalitis (EEE) and West Nile Virus have been transmitted from mosquitoes to people. Most cases of encephalitis in the northeast occur from June through September, when mosquitoes are most active. The viruses commonly live in the insect’s salivary glands and are injected into the person or animal when the insect bites. People can develop diseases from the viruses, but usually can’t pass the virus on to other people or animals. Symptoms The majority of people infected with the viruses have no symptoms and may not even develop the disease. Symptoms may come on slowly or suddenly and might include: fever headache muscle aches Treatment Because there is no cure for encephalitis, doctors can only react to problems the virus causes, such as loss of the ability to breathe involuntarily, and treat complications like bacterial pneumonia. Because encephalitis causes swelling in the brain, it can result in permanent neurological problems and sometimes death. Only a small proportion of people who are infected develop the disease. Reduce your risk More about EEE and West Nile Virus Back Home Search ... Site Map Web site design by Lifespan By using this website, you accept the

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