<prompt> Rabies is diagnosed by ?Hair follicle smearCorneal smearIsolation from bloodNerve biopsy  <response>: Ans. is b i.e., Corneal smear Diagnosis of rabies The diagnosis of rabies is usually made by the detection of rabies virus antigens by immunofluorescence. The specimens collected are : Antemoem Corneal smear Skin biopsy from neck or saliva Postmoem Brain biopsy A definitive pathologic diagnosis of rabies can be based on the finding of Negri bodies in the brain or spinal cord. Other methods for Rabies diagnosis i Rabies virus specific antibodies detection in serum and CSF. But rabies virus-specific antibodies develop relatively late in the clinical course when the patient survives beyond the acute phase. Two methods are used to detect antibodies: Indirect fluorescent antibody test. Rapid fluorescent focus inhibition RFFIT ii Reverse-transcription polymerase chain detection of rabies virus nucleic acid in the saliva. It is done during early CNS infection. 