Does saliva contain DNA?

For an adult, the daily saliva secretion is about 1.5 liters, and saliva also plays a role in the human oral cavity that cannot be ignored. For example, food eaten into the mouth will be transferred along with the saliva, so that different tastes can be perceived. At the same time, saliva also contains a large amount of bactericidal and disinfecting substances, so saliva can effectively prevent oral diseases. And if you want to do a paternity test, does saliva contain DNA?

Saliva can be used for paternity testing. Generally, fetal paternity testing requires samples from the mother, amniotic fluid, and a sample from the suspected father. Standard samples include blood, blood stains, hair with hair follicles, oral mucosal cells, etc.

Suggestions: It is recommended that you make a careful consideration before making a decision, pay attention to getting more rest, relaxing your mind, and improving your nutrition. I wish you good health.

1. Preparation for paternity testing

Personnel preparation: 1. The persons to be identified should consist of mother-son-suspected father or parents-son. If only father and son or mother and son are identified, the identification person is generally required to explain the reasons for the identification; 2. Adult persons to be identified should voluntarily agree to the identification, and adolescents over 14 years old should be appropriately asked for their opinions on the identification; 3. The persons to be identified should understand whether they or their close relatives have a history of genetic diseases, so as to provide a reference for the identification. Those with a history of genetic diseases are prone to gene mutations; 4. It is generally better for the children to be identified to be over half a year old.

Documents required: 1. ID card or work permit of the person being identified, marriage and divorce certificate, child's birth certificate or household registration, and other documents proving their identity and their relationship; 2. If the identification is commissioned by a public security, procuratorial or judicial organ, a paternity identification letter of authorization issued by the court, procuratorate, public security department or law firm should be provided, indicating the name, address, ID card of the parents and child, as well as the reason for the application.

According to relevant regulations on forensic identification, a family of three often needs to have a certain amount of blood drawn. Generally 1-2 ml, theoretically one drop of blood is enough. In special circumstances, oral exfoliated cells, hair, embryos and other tissues can also be taken as samples. The cost of judicial paternity testing is generally RMB 4,000-5,000, and the fees charged by each testing agency vary.

2. Anyone can request a paternity test

Whether to do DNA paternity testing or individual and family genetic mapping is entirely your personal decision and does not require the consent of any other relevant departments. However, if it involves a criminal or civil case, a judicial appraisal report with legal effect is required. In accordance with the relevant national judicial procedures, you must produce a letter of authorization from the public security, procuratorate, court and other agencies or law firms.

DNA is an efficient and convenient scientific and technological means, and of course its accuracy rate is also very high, so it is used as a standard for various judgments. For many people in need, in addition to blood draws, hair, body fluids and other items related to body cells can be used for DNA testing. Therefore, there is no need to worry about whether saliva can be used to produce DNA, the answer is yes.