Volume 22, Number 9—September 2016
CME ACTIVITY - Research
Use of Testing for West Nile Virus and Other Arboviruses
Table 4
West Nile virus testing and results for patients with meningitis and encephalitis, Houston, Texas, USA
Variable | Patients, no. (%) |
---|---|
Testing requested, n = 281 | |
Serum IgM and IgG | 168 (60) |
Only cerebrospinal fluid IgM | 44 (16) |
Only serum IgM | 40 (14) |
Serum IgM and cerebrospinal fluid IgM | 17 (6) |
Serum WNV IgM, IgG and cerebrospinal fluid IgM | 4 (1) |
Only cerebrospinal fluid, by reverse transcription PCR | 3 (1)* |
Only serum IgG | 2 (1) |
Unknown |
3 (1) |
Results for patients with acute West Nile virus infection, n = 32 | |
Serum IgM + / serum IgG – | 12 (38) |
Serum IgM + / serum IgG + | 8 (25) |
Serum IgM + / cerebrospinal fluid IgM + | 4 (12) |
Only cerebrospinal fluid IgM + | 4 (12) |
Only serum IgM + | 3 (9) |
Serum IgM + / cerebrospinal fluid IgM – | 1 (3) |
*All 3 samples had negative test results.