Virus | Transmission | Age | Season | Associated syndromes | Frequency | Pathway to CNS |
Piconavirus-enterovirus | Person to person:
| All ages More common in children | Summer Fall | Encephalitis Myocarditis Neonatal sepsis Poliomyelitis | Common | Blood |
Coxsackievirus Echovirus | ||||||
Arboviruses | Direct inoculation by vectors:
| All ages | Summer Fall | Encephalitis | Common | Blood |
Rabies | Direct population by bite of a rabid animal, transplant or inhalation | All ages | No seasonal pattern | Rare | Neuronal | |
Influenza | Person to person:
| All ages | Winter | Encephalitis | Infrequent | Unknown |
Herpesviridae | Person to person | No seasonal pattern | ||||
Herpes simplex | Vertical or horizontal | More common in neonates | Meningo-encephalitis | Common | Blood Neuronal | |
Varicella-zoster | Respiratory | Any age following primary infection | Cerebellitus Encephalitis Myelitis | Infrequent | ||
Epstein-Barr virus | Encephalitis Myelitis Guillain-Barre | Rare | ||||
Adenoviridae | Human | No seasonal pattern | Encephalitis | Rare | Blood | |
Adenovirus |
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