Re: Can DNA be found in urine or saliva?

Neil,

The simple answer to your question is, yes.  Any body fluid or secretion 
that contains nucleated cells contains DNA that can be isolated and 
analyzed.  Even secretions such as tears and ear wax contain nucleated 
cells.  DNA in urine comes from epithelial cells that line the bladder and 
ureters.  A small number of cells are fluffed off every day, and with the 
techniques that are available for DNA typing today, especially PCR, DNA 
profiles can be obtained from a very few number of cells.


Sincerely,

Dale Laux
Forensic Scientist