Login

Join for Free!
112321 members


MOSQUITO AND AIDS

Debate and discussion of any biological questions not pertaining to a particular topic.

Moderator: BioTeam

MOSQUITO AND AIDS

Postby sonawanes61 » Sat Mar 08, 2008 9:04 am

if a mosquito bites an AIDS patient and again bites some other person then why do other person not get infected by AIDS?
sonawanes61
Garter
Garter
 
Posts: 27
Joined: Fri Mar 07, 2008 11:37 am

Postby MrMistery » Sat Mar 08, 2008 9:59 am

i'm guessing they would, if there would be direct blood transfer. Unlike malaria, the AIDS virus does not need a mosquito to reproduce however
"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
MrMistery
Inland Taipan
Inland Taipan
 
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)

Re: MOSQUITO AND AIDS

Postby sonawanes61 » Sat Mar 08, 2008 12:03 pm

i did not understood
sonawanes61
Garter
Garter
 
Posts: 27
Joined: Fri Mar 07, 2008 11:37 am


Postby MrMistery » Sat Mar 08, 2008 6:07 pm

if a mosquito were to transfer HIV-infected blood from one person to another it would indeed bring about AIDS in the second person. But this is not the way it is normally transmitted. Malaria, for instance, can only be transmitted through a mosquito bite.
"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
MrMistery
Inland Taipan
Inland Taipan
 
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)

Postby sonawanes61 » Sun Mar 09, 2008 5:34 am

thts wht i m asking
why???????
sonawanes61
Garter
Garter
 
Posts: 27
Joined: Fri Mar 07, 2008 11:37 am

Re: MOSQUITO AND AIDS

Postby MichaelXY » Sun Mar 09, 2008 6:10 am

This From CDC

Can I get HIV from mosquitoes?

No. From the start of the HIV epidemic there has been concern about HIV transmission from biting and bloodsucking insects, such as mosquitoes. However, studies conducted by the CDC and elsewhere have shown no evidence of HIV transmission from mosquitoes or any other insects - even in areas where there are many cases of AIDS and large populations of mosquitoes. Lack of such outbreaks, despite intense efforts to detect them, supports the conclusion that HIV is not transmitted by insects.


http://www.cdc.gov/hiv/resources/qa/qa32.htm

This from Wiki on malaria

The parasite's primary (definitive) hosts and transmission vectors are female mosquitoes of the Anopheles genus. Young mosquitoes first ingest the malaria parasite by feeding on an infected human carrier and the infected Anopheles mosquitoes carry Plasmodium sporozoites in their salivary glands. A mosquito becomes infected when it takes a blood meal from an infected human. Once ingested, the parasite gametocytes taken up in the blood will further differentiate into male or female gametes and then fuse in the mosquito gut. This produces an ookinete that penetrates the gut lining and produces an oocyst in the gut wall. When the oocyst ruptures, it releases sporozoites that migrate through the mosquito's body to the salivary glands, where they are then ready to infect a new human host. This type of transmission is occasionally referred to as anterior station transfer.[43] The sporozoites are injected into the skin, alongside saliva, when the mosquito takes a subsequent blood meal.


http://en.wikipedia.org/wiki/Malaria
User avatar
MichaelXY
King Cobra
King Cobra
 
Posts: 885
Joined: Fri Jun 15, 2007 7:03 pm
Location: San Diego, Ca

Postby MrMistery » Sun Mar 09, 2008 8:25 pm

I am apparently wrong. I did say at the beginning that i never heard of such a case. However, i still don't see exactly why.
"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
MrMistery
Inland Taipan
Inland Taipan
 
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)

Re: MOSQUITO AND AIDS

Postby Darby » Mon Mar 10, 2008 4:43 pm

There are a couple of reasons -

First, HIV is not a very stable virus, and just being in the mosquito's digestive system would disrupt it.

Second, mosquitoes don't transfer blood from one victim to the next. Agents that use mosquitoes have to be able to get out of the mosquito's gut and into its salivary glands - they "spit" an anticoagulant saliva through their mouthparts when they start a bite. That's how malaria and West Nile virus work.

Because of the first problem, it's unlikely that HIV will transfer through any kind of biting insect, even ones with simpler transfer systems.
Darby
Viper
Viper
 
Posts: 1262
Joined: Thu Mar 02, 2006 5:29 pm
Location: New York, USA

Postby MrMistery » Mon Mar 10, 2008 6:54 pm

i was thinking of blood being left on the mosquito`s mouth, although that is highly improbable. And since the HIV virus does dye when exposed to air, i can see why it wouldn't occur.
Thanks.
"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
MrMistery
Inland Taipan
Inland Taipan
 
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)

Postby Darby » Tue Mar 11, 2008 4:27 pm

The mosquito is pumping blood into its pharynx - I'm not even sure they have a mouth with a space blood could stay in.
Darby
Viper
Viper
 
Posts: 1262
Joined: Thu Mar 02, 2006 5:29 pm
Location: New York, USA

Postby MrMistery » Tue Mar 11, 2008 10:23 pm

the part that it stings you with, I'm not sure what that's called in English - that is what i was referring to when i said mouth
"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
MrMistery
Inland Taipan
Inland Taipan
 
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)

Re: MOSQUITO AND AIDS

Postby Darby » Wed Mar 12, 2008 8:16 pm

Yeah, the "straw" they use is actually several mouthparts brought together - there isn't really a permanent space in it.
Darby
Viper
Viper
 
Posts: 1262
Joined: Thu Mar 02, 2006 5:29 pm
Location: New York, USA

Next

Return to General Discussion

Who is online

Users browsing this forum: No registered users and 8 guests

cron