-------------------- --Lymetutu-- Opinions, not medical advice! Posts: 96222 | From Texas | Registered: Feb 2001
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GretaM
Frequent Contributor (1K+ posts)
Member # 40917
posted
Yikes!
Makes sense. Dr. S of CA found some ticks had an average of 1.2 borellia in salivary glands BEFORE feeding.
**edited name of LLMD**
[ 07-15-2013, 08:48 PM: Message edited by: Lymetoo ]
Posts: 4358 | From British Columbia, Canada | Registered: Jun 2013
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just don
Frequent Contributor (1K+ posts)
Member # 1129
posted
Interesting choice of words here. did they MEAN to say "and" in this sentence or should it read as a comma?
excerpt-"( published in the journal Parasites and Vectors found that black legged ticks can infect people with deer tick virus and Powassan encephalitis.)"
Because read as the word 'and' it makes it sound as if its two separate diseases,,,as a comma it would be one,,,just putting a name on it.
-------------------- just don Posts: 4548 | From Middle of midwest | Registered: May 2001
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posted
I don't know. Let's hope the writer wasn't that sloppy.
-------------------- --Lymetutu-- Opinions, not medical advice! Posts: 96222 | From Texas | Registered: Feb 2001
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Ann-OH
Frequent Contributor (5K+ posts)
Member # 2020
posted
Here is the journal article:http://www.parasitesandvectors.com/content/6/1/185
Isolation of deer tick virus (Powassan virus, lineage II) from Ixodes scapularis and detection of antibody in vertebrate hosts sampled in the Hudson Valley, New York State Alan P Dupuis II1, Ryan J Peters1, Melissa A Prusinski2, Richard C Falco3, Richard S Ostfeld4 and Laura D Kramer1,5* Abstract Background Deer tick virus, DTV, is a genetically and ecologically distinct lineage of Powassan virus (POWV) also known as lineage II POWV. Human incidence of POW encephalitis has increased in the last 15 years potentially due to the emergence of DTV, particularly in the Hudson Valley of New York State. We initiated an extensive sampling campaign to determine whether POWV was extant throughout the Hudson Valley in tick vectors and/or vertebrate hosts.
Methods More than 13,000 ticks were collected from hosts or vegetation and tested for the presence of DTV using molecular and virus isolation techniques. Vertebrate hosts of Ixodes scapularis (black-legged tick) were trapped (mammals) or netted (birds) and blood samples analyzed for the presence of neutralizing antibodies to POWV. Maximum likelihood estimates (MLE) were calculated to determine infection rates in ticks at each study site.
Results Evidence of DTV was identified each year from 2007 to 2012, in nymphal and adult I. scapulariscollected from the Hudson Valley. 58 tick pools were positive for virus and/or RNA. Infection rates were higher in adult ticks collected from areas east of the Hudson River. MLE limits ranged from 0.2-6.0 infected adults per 100 at sites where DTV was detected. Virginia opossums, striped skunks and raccoons were the source of infected nymphal ticks collected as replete larvae. Serologic evidence of POWV infection was detected in woodchucks (4/6), an opossum (1/6), and birds (4/727). Lineage I, prototype POWV, was not detected.
Conclusions These data demonstrate widespread enzootic transmission of DTV throughout the Hudson Valley, in particular areas east of the river. High infection rates were detected in counties where recent POW encephalitis cases have been identified, supporting the hypothesis that lineage II POWV, DTV, is responsible for these human infections.
beaches
Frequent Contributor (1K+ posts)
Member # 38251
posted
Text of article:
Monday, July 15, 2013 New Tick Disease In Dutchess County An infected tick bite can cause infection in humans in just 15 minutes.
A new tick disease found in Dutchess and other local counties can cause infection in humans in just 15 minutes. Research by the Cary Institute of Ecosystem studies in Millbrook as part of a paper published in the journal Parasites and Vectors found that black legged ticks can infect people with deer tick virus and Powassan encephalitis. Unlike with Lyme disease where it is thought that it can take a tick 24 hours to infect a person, deer tick virus transmission can occur in just 15 minutes. The virus can cause central nervous system disruption, encephalitis and meningitis. There is a 10-15 percent fatality rate in reported cases. The disease has also been found in Ulster, Orange, Putnam, Sullivan, Rockland and Westchester counties.
Rick Ostfeld, a disease ecologist at the Cary Institute says researchers have found a rise in the illness in New York especially on the east side of the Hudson River.
posted
The virus was discovered a number of years ago, but as with all things tickborne the longer it is in the environment the higher the percentage of ticks that will be infected.
And naturally there is no commercially available test for the virus.
Pretty sure previous cases were in Minnesota and maybe even across the border in Canada.
Bea Seibert
Posts: 7306 | From Martinsville,VA,USA | Registered: Oct 2004
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posted
A quick check of pubmed shows that Powassan virus was around as far back as 1959.
Apparently even today in about 50 percent of cases of viral encephalitis and viral meningitis a cause is never found. Really makes you wonder how often Powassan virus might be the cause.
It has been found in many states -- Minnesota, New York, North Dakota, Connecticut and Tennessee were just a few that were mentioned.
Here is a recent journal article that describes 4 cases and shows the severity of the potential symptoms.
-------------------- --Lymetutu-- Opinions, not medical advice! Posts: 96222 | From Texas | Registered: Feb 2001
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Catgirl
Frequent Contributor (5K+ posts)
Member # 31149
posted
I'm not surprised by this.
The worm's brain is wired differently than people who are open to reason. A lot of people are like this. You can give them all the facts and they just don't believe it (unfortunate for all the rest of us).
-------------------- --Keep an open mind about everything. Also, remember to visit ACTIVISM (we can change things together). Posts: 5418 | From earth | Registered: Mar 2011
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