Non-PRO English to Chinese Medical Medical (general) pathology

Neutropenia
(Agranulocytosis; Granulocytopenia)
Neutropenia is a reduction in the blood neutrophil (granulocyte) count.
If it is severe, the risk and severity of bacterial and fungal infections increase.
Focal symptoms of infection may be muted, but fever is present during most serious infections.
Diagnosis is by WBC count, but evaluation requires identification of the cause.


Please help understand the last sentence. Does it mean "the final evaluation of the case(patient) requires identification of the cause of the disease?" Can anyone help in Chinese? thank you.