The forensiX Evidence Collection Tube and Its Impact on DNA Preservation and Recovery

Table 3

DNA yields for the different storage methods.

Samples	Description of storage of saliva sample	Average DNA yield per swab (ng)	Standard deviation of results (ng)	DNA recovery relative to saliva controls
1–3	Microfuge tube, frozen, and control	455	47.4	100.0%
4–6	forensiX Swabs, frozen	328	75.4	72.0%
7–9	Sarstedt Swabs, frozen	246	20.3	54.0%
10–12	forensiX Swabs, without desiccant	22	4.5	4.8%
13–15	forensiX Swabs with desiccant	431	13.8	95.0%
16–18	Sarstedt Swabs, sealed	4	2.0	0.9%
19–21	Sarstedt Swabs, unsealed	56	3.3	12.3%