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heng7844 · Oct 7, 2007, 05:29 AM

Hello anyone. I'm a newbie here, hope to find some help here. I'm a student taking degree in biomedical science. I'm required to produce a research project in order to get my degree. I'm interested in forensic science so I choose it to be my field of research. I wonder how a real crime scene investigator is going to check if a blood sample or blood stain in the crime scene is a human blood or animal blood? Does crime scene investigator has a specific chemical (such as lumino for human blood detection) to do that?

Fr_Chuck · Oct 7, 2007, 07:35 AM

I am sorry, if you are taking biomedical science you would or at least should know all about blood testing, DNA testing of the blood, The make up is just totally different. At the scene the investigator may not know, they send it to the lab to be tested.

Also you should know that lumino only shows traces of blood, not the type

heng7844 · Oct 8, 2007, 01:50 AM

Originally Posted by Fr_Chuck

I am sorry, if you are taking biomedical science you would or at least should know all about blood testing, DNA testing of the blood, The make up is just totally different. At the scene the investigator may not know, they send it to the lab to be tested.

Also you should know that lumino only shows traces of blood, not the type

Ya, I do know about the blood testing and DNA testing. But what I want is the test that is similar to the lumino test which can give immediate response. That's why I give lumino as an example. The tests you mentioned require a period to be done, so I think it is not good enough for the crime scene investigation which need immediate result on the spot. This is why the lumino test is created, I think, right? What I want to know is that is there any chemical that the CSI currently use to differentiate between human blood and animal blood on the spot at the crime scene?

Anyway, thanks for your reply, and if you do know the answer, please reply me, thanks

firmbeliever · Oct 8, 2007, 06:08 AM

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Glossary Of Forensics Terminology II
Luminol - A chemical reagent that makes invisible blood flouresce in darkness; capable of detecting blodstains diluted up to 10,000 times. Luminol is used to identify blood that has been removed from a given area. It is an invaluable tool for investigators at altered crime scene.
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You might also like to look at this link BLUESTAR Forensic - Chemistry and history
And this one too.
FORENSICS

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Forensic Files
Ouchterlony Test
A test that determines if a blood stain is human or animal.
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heng7844 · Oct 8, 2007, 11:47 AM

Originally Posted by firmbeliever

------------------
Glossary Of Forensics Terminology II
Luminol - A chemical reagent that makes invisible blood flouresce in darkness; capable of detecting blodstains diluted up to 10,000 times. Luminol is used to identify blood that has been removed from a given area. It is an invaluable tool for investigators at altered crime scene.
---------------------------------

You might also like to look at this link BLUESTAR Forensic - Chemistry and history
and this one too.
FORENSICS

------------------------
Forensic Files
Ouchterlony Test
A test that determines if a blood stain is human or animal.
-------------------------------

Thank you so much for your reply, it is really helping
I can even get other information that I need from the site you gave, really thanks.

firmbeliever · Oct 8, 2007, 01:12 PM

You are welcome!

heng7844 · Oct 9, 2007, 08:52 AM

Originally Posted by firmbeliever

You are welcome!

Do you know any biochemical test which can give the same effect like Precipitin (Blood) Test or ouchterlony test on determining a blood stain. I ask this because my college only provides some chemicals used in biochemical test, I don't think they will provide me with the materials needed to perform those test. Thanks

firmbeliever · Oct 9, 2007, 09:43 AM

I am no expert in these things,
I will have to check around the internet and find what I could come up with.
In the meantime try the same links I gave and see if there any possibilities.

I will try and let you know what I come up with.

Sugarnojutsu · Oct 28, 2008, 11:46 AM

Originally Posted by heng7844

Hello anyone. I'm a newbie here, hope to find some help here. i'm a student taking degree in biomedical science. I'm required to produce a research project in order to get my degree. I'm interested in forensic science so i choose it to be my field of research. i wonder how a real crime scene investigator is going to check if a blood sample or blood stain in the crime scene is a human blood or animal blood? does crime scene investigator has a specific chemical (such as lumino for human blood detection) to do that?

This is done by bones and bloodstains from the animals. You can also use a blind test, the blind test uses protein radioimmunoassay (pRIA), this is used to identify the species of six bone fragments lacking morphological specificy and 43 bloodstaned lithic tools, then soacked in blood of known animals and human origin. The bone fragments and the bloodtained tools list a number of possible species. The pRIA technique shows a high degree of accuracy in idenifying an animal from a human.

Sugarnojutsu · Oct 28, 2008, 11:47 AM

This is done by bones and bloodstains from the animals. You can also use a blind test, the blind test uses protein radioimmunoassay (pRIA), this is used to identify the species of six bone fragments lacking morphological specificy and 43 bloodstaned lithic tools, then soacked in blood of known animals and human origin. The bone fragments and the bloodtained tools list a number of possible species. The pRIA technique shows a high degree of accuracy in idenifying an animal from a human.
Source:Elsevier Article Locator

Charart · Nov 8, 2008, 02:46 AM

There is a simple presumptive test that can be done at scenes to determine if it is animal or human, however it does produce some false positives, such as with rabbit blood. I can not think at the moment what it is called (acronym is something like MBA?). If you Google 'presumptive test for blood type you may gte an answer

Charart · Nov 8, 2008, 02:48 AM

They are called ABA cards

medgen · Dec 13, 2008, 06:02 PM

There is a very simple test we perform in our lab that looks and works very much like a pregnancy test. You drop some of the diluted blood on the card -- two bands it's human, one band it is not. It is called the ABAcard hematrace. Other companies make similar cards.

http://www.tetrasoc.com/human-blood-...2%AE-p-81.html

Oops -- sorry, I see that this was already answered somewhat in November. I'll just add one little thing -- cross-reactivity is pretty rare and limited to higher apes and a few other unexpected ones. Ferrets are one of these, although rarely involved in much crime!

martinvoss · Jul 10, 2009, 09:42 PM

You may want to check out Hemascein by Abacus Diagnostics that does both i.e. reveals blood stains and identifies if the stain is of human origin.