Chiza Symptom

Siskin symptom (Chizha symptom) is a pathognomonic sign that allows one to distinguish infectious psychosis (for example, malarial) from non-infectious mental disorders.

The symptom was first described by the Russian psychiatrist V.F. Chizh in 1905. He observed a patient with malaria who experienced hallucinations and persecutory delusions. However, when the patient recovered, his mental disorders disappeared.

Chizh's symptom is that after recovery from infectious psychosis, the patient retains residual hallucinations or delusions. This symptom is an important diagnostic feature that helps distinguish infectious psychoses from other mental disorders.