|
| | Adults | Children |
| Antecedent infection (0–2 weeks) | More than 80% of patients; fever, headache, digestive-tract or upper respiratory-tract symptoms | Less common |
| Psychiatric and behavioral symptoms | About 80% of the cases; anxiety, irritability, insomnia, paranoia, aggression, auditory or visual hallucinations, sexual disinhibition, mania, cognitive disorder and psychosis; isolated psychiatric symptoms are rare | Less common |
| Seizures | About 70% of the cases; usually partial in males, and generalized in females; prolonged status epilepticus may occur | Usually partial motor or complex seizures; initially as frequently as psychiatric symptoms |
| Motor dysfunctions | Orofacial dyskinesias, chorea, ballismus, athetosis, rigidity, stereotyped movements, myorhythmia, or opisthotonus | More common; atypical symptoms such as hemiparesis or cerebellar ataxia predominate in this age group |
| Memory dysfunction | Short-term memory loss | Less common |
| Speech disorders | More than 70% of patients; reduction of verbal output or mutism, echolalia (usually with echopraxia), mumbling, or perseveration | |
Decrease in level
of consciousness | 88% of patients during the first 3 weeks | |
| Autonomic dysfunctions | About 70% of the cases; hyperthermia, cardiac dysrhythmias (tachycardia or bradycardia), hypersalivation, hypotension, hypertension, urinary incontinence, and sexual dysfunction | More common; predominantly tachycardia, hyperthermia, and hypertension |
| Central hypoventilation | Approximately 70% of patients | Less common |
|
