Only samples collected at bedtime have any diagnostic value.
Specimens taken at other times will not be processed , except by special arrangement with the Chemical Pathologist.
Saliva is collected at the patient's usual bedtime, before brushing teeth or flossing.
Two acceptable methods of collection are: using a Salivette (obtainable from the laboratory). The cotton wool swab is removed from the salivette and placed in the mouth until saturated (1 to 3 min), then replaced in the salivette, and capped.
Direct spitting into a wide-mouthed container. At least 2 mL of saliva is required.
The time and date of collection must be noted on the request form.
After collection, the specimen can be kept at room temperature (for up to 24 hours), refrigerated (for up to 72 hours), or frozen if the time before delivery to the laboratory is likely to be longer than 72 hours.