noun
suspected case (of a disease)
Medical term used when a patient shows symptoms that suggest a particular disease but a definitive diagnosis has not yet been made.
彼は新型インフルエンザの疑似症として隔離された。
He was isolated as a suspected case of the new influenza.
疑似症の段階では確定診断はできない。
A definitive diagnosis cannot be made at the suspected-case stage.
疑い is a general word for suspicion or doubt, whereas 疑似症 is a specific medical term for a suspected disease case.
Compound of 疑似 (giji, 'pseudo-; suspected') and 症 (shō, 'symptom; condition'). The term is used in medical contexts to describe a case that appears to be a particular disease but lacks confirmation.