<unk>  infection is rarely diagnosed as a cause of encephalitis; however, when it is,<unk>  encephalitis is severe, and neurologic sequelae are common.<unk>  encephalitis has symptoms compatible with acute disseminated encephalomyelitis, oftentimes making it difficult to diagnose.<unk>  encephalitis is a challenge to diagnose because there are only a few laboratories that offer testing, the most effective being serologic testing. There are currently no medications or approved vaccines to treat or prevent the POWV. People affected by<unk>  generally first show symptoms 1 to 3 weeks after infection. The initial symptoms include fever, headache, nausea, occasional confusion, and weakness. With severe<unk>  illnesses the victims should be hospitalized, because the symptoms do worsen. If not treated, symptoms could extend to meningoencephalitis, which may include: seizures, aphasia, cranial nerve palsies, paresis and altered mental status. Currently, the best ways to treat POWV illnesses include medications to reduce brain swelling, respiratory support and intravenous fluids. About 10% of POWV encephalitis cases are fatal and half the survivors have permanent symptoms that affect their brain. There were 33 confirmed cases of<unk>  infection in the U.S. between 2001 and 2010. A rare case of a five-month-old Connecticut infant boy contracting<unk>  infection was published in 2017. He survived with normal motor and verbal development on follow-up at the age of 10 months, but a head MRI showed severely abnormal brain conditions, including scarring (gliosis) and softening (encephalomalacia) in the thalamus and basal ganglia on both sides, and volume loss and early mineralization in the left basal ganglia. On October 28, 2019, former U.S. Senator Kay Hagan died after contracting<unk>  in 2016. She was 66 years old.
Powassan virus
Limestone Canyon virus
Hendra virus
Playa de Oro virus
Sepik virus
Human bocavirus
Yaba monkey tumor virus
Caño Delgadito orthohantavirus