| Test | Specimen Requirements |
| Weil-Felix (Rickettsia Ag) | 10 mL GEL (white / yellow). |
| White Cell Count Including 5 part differential | 4mL EDTA (purple) |
| White Cell Count only | 4mL EDTA (purple) |
| Whooping Cough (Bordatella pertussis)* Serology or by PCR assay | 10 mL GEL (white / yellow). Swab sample. |
| Widal Test | 10 mL GEL (white / yellow). |
| Widal/Weil-Felix Test | 10 mL GEL (white / yellow). |
| Wound Swab Micro & culture includes gram stain and culture for aerobic and anaerobic organisms | Swab collected onto gel transport medium. |