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About 90% of cases of herpes encephalitis are caused by herpes simplex virus-1 (HSV-1), the same virus that causes cold sores. According to a 2006 estimate, 57% of American adults were infected with HSV-1, [ 3 ] which is spread through droplets, casual contact and sometimes sexual contact, though most infected people never have cold sores.
The number of cases of encephalitis has not changed much over time, with about 250,000 cases a year from 2005 to 2015 in the US. Approximately seven per 100,000 people were hospitalized for encephalitis in the US during this time. [34] In 2015, encephalitis was estimated to have affected 4.3 million people and resulted in 150,000 deaths worldwide.
Neonatal herpes simplex, or simply neonatal herpes, is a herpes infection in a newborn baby, caused by the herpes simplex virus (HSV). It occurs mostly as a result of vertical transmission of the HSV from an affected mother to her baby. [ 2 ]
It's the same story for many children's hospitals. "We had more cases of RSV in October of 2022 than we've had in the last couple of years," said Dr. Mel St. Germain of Children's Hospital and ...
HSV-1 can lead to potentially fatal cases of herpes simplex encephalitis. [84] Herpes simplex viruses have also been studied in the central nervous system disorders such as multiple sclerosis, but research has been conflicting and inconclusive. [85] Following a diagnosis of genital herpes simplex infection, patients may develop an episode of ...
For some forms of viral encephalitis, such as Eastern equine encephalitis and Japanese encephalitis, there may be a significant amount of necrosis of nerve cells. Following encephalitis caused by arboviruses, calcification may occur in the CNS, especially among children. Herpes simplex encephalitis tends to produce necrotic lesions in the CNS. [1]
Herpes simplex virus is a rare cause of meningitis, occurring only 0.165 in 10,000 live births in the UK and 0.2-5 in 10,000 live births in the US [2] [4] [19] Both HSV-1 and HSV-2 can cause neonatal meningitis, however, HSV-2 accounts for 70% of the cases. [citation needed] Herpes simplex virus is transmitted to neonates mainly during delivery ...
About 30% of encephalitis cases caused by EEE result in death. "I think the mortality risk if one were to contract dengue or West Nile virus would be very low. For EEE, it's the opposite; it's ...