Posted on | May 11, 2011 | 2 Comments
Paternity testing can be done with a number of DNA samples, for example blood, semen or nail clippings. However, the standard sample is a saliva sample collected using an oral or buccal mouth swab.
Perhaps misleading, the terms saliva DNA sample in paternity testing (vaterschaftstest) is not so much about saliva. Using an oral swab and rubbing inside the mouth creates frictions; in our mouth we have cheek cell lining the entire mouth. When friction is created against these cheeks cells they easily rub away by the thousands. So yes, in the end you do collect lots of saliva but saliva is not used for the DNA test as there is no DNA in spit. However, the cheek cells collected have lots of DNA in their nucleus.
Scientists have a procedure for DNA testing known as PCR which they use for extracting DNA in paternity tests and many other types of DNA testing.
If you cannot take a sample with an oral swab, then you can consider other options for your DNA test for paternity, such as using a blood stain or cigarette ends; however you will need to be careful here as not all samples are ideal for extracting DNA. Some DNA sample provides very low chances of extracting a DNA profile to complete paternity testing.