e872a21d_NA_Test_Kit_Acceptable_Samples__These_are_the_ones_to_obtain_
[Excellent Samples] Hocked Loogie $300.00 [These are the ones to obtain.] 
It sounds disgusting, however a large wad of mucus from a person not infected (cold, flu, fever) can be a good source of DNA.
Home DNA Test Kit Acceptable Samples
These are the ones to obtain.