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» LymeNet Flash » Questions and Discussion » Medical Questions » VERY interesting stats! Rocking the IDSA/CDC theories

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Author Topic: VERY interesting stats! Rocking the IDSA/CDC theories
Honored Contributor (10K+ posts)
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Can someone please send the IDSA a stack of diapers? And please send some to the CDC too.

With all these studies coming out continuing to prove them wrong, it looks like they may need them!


Ticks Tick Borne Dis. 2011 Sep;2(3):129-36. Epub 2011 Jul 28.

Prospective study on the incidence of infection by Borrelia burgdorferi sensu lato after a tick bite in a highly endemic area of Switzerland.

Huegli D, Moret J, Rais O, Moosmann Y, Erard P, Malinverni R, Gern L.

Institut de Biologie, Laboratoire d'Eco-Epidmiologie, Universit de Neuchtel, 2000 Neuchtel, Switzerland.

The periurban forest of Neuchtel (Switzerland) is a high-risk area for Lyme Borreliosis, due to a high density of infected Ixodes ricinus ticks. In this study, we evaluated the risk of subclinical (seroconversion) and clinical infection after a tick bite in Neuchtel inhabitants from 2003 to 2005.

Inhabitants have been invited, through media, to visit a physician after a tick bite.

A questionnaire was filled out and two blood samples were taken at 8-week interval. EIA screening tests for IgM and IgG (IMX system, Abbott) were applied for paired sera.

In case of a change in antibody titres between both samples, a homemade Western-blot using Borrelia afzelii, B. burgdorferi sensu stricto and B. garinii as antigens was performed.

Participants were included into two groups.

Group one included asymptomatic participants (n=255). Among them, nine (3.5%) seroconverted with seroconversion rates varying between 6.8% in 2003, 2.1% in 2004 and 2.3% in 2005.

Participants who developed clinical symptoms of LB were included into group two (n=14).

Erythema migrans (EM) was reported in 5.2% of participants (5.2%), varying between 7.5% in 2003, 5% in 2004 and 3.4% in 2005.

Ticks obtained from 186 participants were examined for B. burgdorferi infection by PCR/Reverse Line Blotting, and by Real Time PCR and tick attachment duration was estimated.

Among I. ricinus ticks collected from participants, 32.8% were infected by B. burgdorferi sensu lato. B. afzelii predominated among these ticks.

Globally, 65.9% of nymphs remained attached for more than 24h whereas only 38.3% of female ticks remained attached for more than 24h.

We observed that 6.6% and 2.4% of participants bitten by infected and uninfected ticks, respectively, developed EM.


Posts: 20353 | From The Moon | Registered: Jun 2004  |  IP: Logged | Report this post to a Moderator
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Ha ha! 6.6% and 2.4% is waaay low! I 've always wondered about the rash "statistics" that are trotted around. I got Lyme just a fifteen minute drive from Lyme CT and never got a rash! I was WB positive from the get go. And of course I 'm not the only one.

I suppose Dr. Baker and the rest will simply say different "strain" of Bb, won't they? Thanks Tincup!

Posts: 65 | From oregon | Registered: Jun 2011  |  IP: Logged | Report this post to a Moderator

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Another messed up thing is that when they recommend that we take the IDSA prophylactic of a single dose of 200mg doxycycline, we have an 80% chance less of developing the rash, but it doesn't lower our chances of getting the disease! So basically their prophylaxis gives us more of a chance to go undiagnosed.

I took the prophylaxis, and I never got a rash.

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