Buccal swabs are predominately used in DNA testing for a number of reasons. First and foremost, buccal swabs are easy to use and they are not invasive for the parties being tested. In addition to this buccal swabs have a high DNA extraction rate and a low risk of sample problems. However, there are a number of non-standard or alternative samples used in DNA testing that may not have as high of an extraction rate.
Teeth and bone have the least reliable extraction rate of all the non-standard DNA samples. This is because the process of extracting DNA from teeth and bone is extremely difficult. To improve DNA extraction rate the process must be handled by a special forensic laboratory. Other variables can affect the outcome of DNA extraction form teeth and bone. These factors would include storage conditions, improper handling, and actual presence of DNA. The overall DNA extraction rate for teeth and bone is between 20 to 3o percent.
When you are sending off every day items for DNA extraction you want to consider that success rate. If you send off cigarette butts or a toothbrush the average DNA extraction rate falls somewhere between 50 to 60 percent. However, those rates can be improved or decreased with certain variables. With these two items, the more they are used to more likely DNA extraction will be successful. In addition to this, they have to be gathered from proper sources. This means that you want to ensure the items have not been contaminated by outside elements such as other people’s DNA or the weather.
Any tine you are trying to determine paternity it is best to use a sample that has a high instance of DNA extraction. Blood stains that are fresh and hair samples with attached roots or follicle have the best extraction rate among non-standard DNA samples. Naturally, this hinges on the sample being handled properly when it is collected. However, as long as all procedural guidelines for sample collection are followed hair and blood have an 80 percent or greater DNA extraction rate.
When you need to determine the paternity of a child through DNA testing your best option for accurate results is through professional laboratory collection. Whenever you use non-standard DNA samples you run the risk that extraction may be unsuccessful. For this reason, you should only use this option when you have no alternative. There are many affordable and reliable laboratories that can provide DNA testing that is safe, accurate and non-invasive.