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- From: dfield@zeus.calpoly.edu (InfoSpunj (Dan Field))
- Newsgroups: sci.med
- Subject: Re: What homing device does a virus use?
- Message-ID: <1992Nov20.030156.135846@zeus.calpoly.edu>
- Date: 20 Nov 92 03:01:56 GMT
- References: <17491@pitt.UUCP> <lgihacINN6hm@peaches.cs.utexas.edu> <lgilbnINN61a@news.bbn.com>
- Organization: California Polytechnic State University, San Luis Obispo
- Lines: 60
-
- In article <lgilbnINN61a@news.bbn.com> levin@bbn.com (Joel B Levin) writes:
- >In <lgihacINN6hm@peaches.cs.utexas.edu> Russell Turpin says:
- >|In article <17491@pitt.UUCP> geb@cs.pitt.edu (Gordon Banks) writes:
- >|> The same way that plant seeds distinguish soil from rocks: they don't, ...
- >|
- >|For once, you lose me. Seeds clearly do distinguish soil from
- >|rocks: they grow in the former and die on the latter.
- >
- >I liked the way Gordon phrased it; I suspect he answered a question
- >different from what you meant to ask. He says (if I may presume to
- >interpret) that the organisms don't "home in" on the particular areas
- >they infect; rather that, like seeds scattered in the wind, they show
- >up everywhere but only find conditions suitable for growth (soil) in
- >these particular areas and fail to thrive everywhere else.
- >
- >| Now ... What are the mechanisms in the case
- >|of the question I posed?
- >
- >Now -- if you are asking why the viruses grow in certain areas and not
- >in others, that is a different question. I assume it has to do with
- >availability of warmth, moisture, absence of direct exposure to air,
- >etc.; one of the doctors or scientists will have to answer that
- >question, which I don't think was exactly what you asked.
-
- Doesn't the herpes virus remain in the nerve at the end of which it was
- first innoculated? I've heard that it CAN infect other body parts, like
- hands, if it has an opportunity to contact a skin break there.
-
- Contact from an infected body part to certain other body parts is
- more likely than to certain others (such as genital-genital, lip-lip
- contact, and various combinations thereof). Once infection occurs
- at one site, however, I don't think it can infect other parts on
- the same person; for example, a person orally infected with one of the
- types of the herpes virus won't have genital lesions unless a separate
- infection has occurred there. Am I correct? I've also heard reference
- to "self transmission," or transmission to other body parts by the
- same patient.
-
- So here's my rephrasing of what I got out of the original question:
- what mechanism (or lack thereof) prevents the herpes virus from
- launching a systemic attack, or of any apparent navigation at all
- inside the body of it's host?
-
- My personal speculation (uninformed) is that it would be related to the
- difficulty in developing an effective herpes vaccine; even if you have
- antibodies to the herpes virus, they're not going to do much in the
- bloodstream if the virus is not appreciably circulating in the blood
- anyway, but rather in your nervous system. The antibidies would,
- I would imagine, be able to interfere with the ability of the virus
- to infect other parts of the body by attacking it in the bloodstream and
- lymph.
-
- Is this correct? Also, any info on vaccine development for herpes
- would be interesting. Please add it to this discussion if you have
- it!
-
- --
-
- -Daniel R. Field
- dfield@nike.calpoly.edu
-