Yes, vomit contains DNA. Vomit is made up of stomach contents, including cells that shed from the lining of the stomach and other parts of the digestive system. These cells contain nuclear DNA, which is the genetic material found in the nucleus of a cell. While vomit can be tested for DNA, it may not always be routinely accepted by laboratories for testing.
Here are some additional points to consider:
- Other DNA: Vomit also contains the DNA of bacteria and other microorganisms that live in the digestive system. This is known as mitochondrial DNA.
- Not all vomit samples are suitable for DNA testing. The quality and quantity of DNA in vomit can vary depending on factors like the amount of vomit, the time elapsed since vomiting, and the presence of other substances.
- Practical applications: DNA testing of vomit can be useful in criminal investigations, particularly when other biological evidence is limited. It can help identify individuals present at a crime scene or provide evidence of a specific act.
