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Table 2 Investigations

From: Case report: a case of diffuse unilateral subacute neuroretinitis (DUSN) in a child

Serology
 Full blood count Normal
 Urea and electrolytes Normal
 Liver function test Normal
 Erythrocyte sedimentation rate (ESR) Normal
 C-Reactive protein (CRP) Normal
 Anti-nuclear antibodies Positive
 Anti-Streptolysin O titre 200 units/ml (Normal)
 IgG/IgM Toxoplasma Negative
 IgG/IgM Toxocara Negative
 IgG/IgM B.burgdorferi Negative
 IgM Herpes simplex virus Negative
 IgM Cytomegalovirus Negative
 IgM Varicella zoster virus Negative
 IgM Parvovirus B19 Negative
Imaging
 MRI brain Normal
 Magnetic Resonance Venogram brain Normal
 Magnetic Resonance Angiogram brain Normal
 Chest X-ray Normal
CSF Analysis
 White cell count < 1 × 106 /L)
 Total protein 0.26 g/L
 Glucose 2.9 mmol/L
 Culture Negative
 Polymerase Chain Reaction (PCR) for herpes simplex virus Negative
 PCR for Enterovirus Negative
 PCR for Parechovirus Negative
 PCR for Streptococcus pneumoniae Negative
 PCR for Haemophilus influenza Negative
 PCR for Cytomegalovirus Negative
 PCR for Bartonella Negative
 PCR for Treponema palladium Negative
Other
 Mantoux Positive (but had BCG vaccine)
 Quantiferon Negative
 Gastric washings No acid-fast bacilli