confused about HIV

About microscopic forms of life, including Bacteria, Archea, protozoans, algae and fungi. Topics relating to viruses, viroids and prions also belong here.

Moderators: honeev, Leonid, amiradm, BioTeam

User avatar
opuntia
King Cobra
King Cobra
Posts: 538
Joined: Wed Jun 15, 2005 6:39 am
Location: Maldives(the chain of islands)

confused about HIV

Post by opuntia » Tue Oct 25, 2005 7:01 pm

I'm kind of confused about the HIV, Could it be possible to show the prsence of HIv in the human body during the asymptomatic period of it? If so what kind of a test would prove it?
"The roots of education is bitter, but the fruit is sweet" Aristotle

User avatar
MrMistery
Inland Taipan
Inland Taipan
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)
Contact:

Post by MrMistery » Tue Oct 25, 2005 7:09 pm

If you get infected with HIV you may test positive after 3 months, but you need to wait 9 months to be totally sure. You can also have a flase positive at anytime. I know they can not test for the virus itself so they test for antibodies but aside from that, nothing..
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter

User avatar
opuntia
King Cobra
King Cobra
Posts: 538
Joined: Wed Jun 15, 2005 6:39 am
Location: Maldives(the chain of islands)

Post by opuntia » Tue Oct 25, 2005 7:11 pm

So during the early days of infection it cannot be detected?
"The roots of education is bitter, but the fruit is sweet" Aristotle

User avatar
canalon
Inland Taipan
Inland Taipan
Posts: 3909
Joined: Thu Feb 03, 2005 2:46 pm
Location: Canada

Post by canalon » Tue Oct 25, 2005 7:40 pm

As Andrew said, the VIH cannot be detected directly, so the tests are directed toward the antibodies. Depending on the sensitivity of the test (ELISA is the most sensitive, but needs a completely equipped laboratory and it is long so some less sensitive test easier to carry out or faster are often used) the detection is possible from 3 weeks to 6 months after infection, the silent period is called 'window period' and ends with what is called the seroconversion.

Hence if you think that you may have been infected (risky sexual behavior or accident) you have to wait before being tested, but if it is available and you have serious reason to fear infection a shock treatment can be prescribed immediately (probably depends on local health policies too...).

As Andrew said, since test are selected for high sensitivity (as little false negative as possible), there is a probability for false positivity, therefore if tested positive a second test carried out with another protocol should be used to confirm the result.

Hope this helps.
Patrick

Science has proof without any certainty. Creationists have certainty without
any proof. (Ashley Montague)

User avatar
opuntia
King Cobra
King Cobra
Posts: 538
Joined: Wed Jun 15, 2005 6:39 am
Location: Maldives(the chain of islands)

Post by opuntia » Wed Oct 26, 2005 12:37 pm

Ok, thanks very much. :D
"The roots of education is bitter, but the fruit is sweet" Aristotle

User avatar
MrMistery
Inland Taipan
Inland Taipan
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)
Contact:

Post by MrMistery » Thu Oct 27, 2005 7:00 pm

Oh yea, i remembered another thing. because they do know that a false positive is possible, in our country they actually do the test again(probably with a different procedure, as patrick said) without even telling you...
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter

User avatar
opuntia
King Cobra
King Cobra
Posts: 538
Joined: Wed Jun 15, 2005 6:39 am
Location: Maldives(the chain of islands)

Post by opuntia » Fri Oct 28, 2005 9:17 am

If it's possible, could you please give some details about how the test is carried out?

Thank you once again. :D
"The roots of education is bitter, but the fruit is sweet" Aristotle

User avatar
MrMistery
Inland Taipan
Inland Taipan
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)
Contact:

Post by MrMistery » Fri Oct 28, 2005 6:55 pm

I can't because i have no idea. Google it. If you come up empty maybe Patrick can help out..
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter

User avatar
opuntia
King Cobra
King Cobra
Posts: 538
Joined: Wed Jun 15, 2005 6:39 am
Location: Maldives(the chain of islands)

Post by opuntia » Sat Oct 29, 2005 6:40 pm

hehe, i found loads...here is a good one that has everything i need HIV testing
"The roots of education is bitter, but the fruit is sweet" Aristotle

User avatar
MrMistery
Inland Taipan
Inland Taipan
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)
Contact:

Post by MrMistery » Sun Oct 30, 2005 11:04 am

I told you: Google is your best friend
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter

User avatar
opuntia
King Cobra
King Cobra
Posts: 538
Joined: Wed Jun 15, 2005 6:39 am
Location: Maldives(the chain of islands)

Post by opuntia » Sun Oct 30, 2005 11:32 am

yeah, but i forgot that.
"The roots of education is bitter, but the fruit is sweet" Aristotle

User avatar
ESTRANGED
Garter
Garter
Posts: 5
Joined: Wed Nov 09, 2005 8:49 pm

Post by ESTRANGED » Fri Dec 02, 2005 12:03 am

the VIH cannot be detected directly, so the tests are directed toward the antibodies.


i thought it was HIV. why it cannot be detected? what is an antibody?
:oops: sorry :oops:

Post Reply

Who is online

Users browsing this forum: No registered users and 6 guests