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dsimpson1990 dsimpson1990
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12 years ago Edited: 12 years ago, dsimpson1990
Im currently doing a report on a murder investigation and i'm looking at the pathologists notes and have some queries;

The notes say that when swabs have been taken from the hands and neck of the victim that there was a dry swab taken and wet swab taken- I was wondering why this is?

There were also rectal swabs, perineal swabs, vulval swabs and vaginal swabs taken, it states that there were 2 swabs taken of each of these so I was also wondering why that is?

If anyone could also give me any idea of how these swabs would have been taken it would be a big help such as the equiptment used, what they are stored in etc.

It also says that samples of the pubic hair were taken and that one sample was combed, the other pulled- why would you need both?

Thanks  Slight Smile
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wrote...
Staff Member
Educator
12 years ago
Here's the thing about combing versus pulling. Combing is used to collect any loose hairs that landed on the victim. This hair could be used to identify the suspect. Recall that combing gathers up loose hair whereas pulling (or plucking) will give you a rich source of DNA and information about the victim. The root of a hair can tell an investigator whether the hair in question has been pulled out or shed naturally. There are three stages of hair growth. The first stage is the Anagen stage in which the hair is actively growing. If a hair is pulled out during this stage the root bulb will appear flame shaped. Hairs forcibly removed during this stage of grow will have follicular tissue (clear tissue just above root bulb) adhering to it. This is the richest source of DNA. DNA from an Anagen hair can provide nuclear DNA. Nuclear DNA can be analyzed to create a profile of the donor unique to that individual. DNA profiles can help match a suspect or victim hair sample to known samples. The Anagen stage of growth lasts for up to six years.

The second stage of growth is the Catagen stage. In this stage the root becomes elongated. This is the end stage of growth. The root pulls back and can easily be dislodged. The Catagen stage lasts for several weeks. The final stage is the Telagen phase which can last up to 6 months. In this stage the root is club shaped and the hair is naturally shed.
Mastering in Nutritional Biology
Tralalalala Slight Smile
wrote...
Staff Member
Educator
12 years ago
Here's the second part to the question about swabs Slight Smile I scanned it from a book.
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Mastering in Nutritional Biology
Tralalalala Slight Smile
wrote...
12 years ago
Thanks padre great answer
wrote...
Staff Member
12 years ago
Please mark this as solved, dsimpson1990.
- Master of Science in Biology
- Bachelor of Science
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