Ying Zhang, MD @JohnsHopkinsSPH talking about different types of treatment that are effective for treatment of persistent Lyme in mouse models & other persistent infections. #LivLymeSummit@liv_lyme
@JohnsHopkinsSPH@liv_lyme Zhang | current IDSA treatment 2-4 weeks of Abx leaves 10-20% (4-36%) of patients with persistent symptoms. "feeling is that a majority is due to persistent infection" In these patients PTLDS = "partially treated Lyme disease syndrome" #LivLymeSummit
@JohnsHopkinsSPH@liv_lyme Zhang | what we've shown in chronic TB infection is we need a combination of drugs to kill the bacteria. "If we treat to short of time we get a high relapse rate." By adding persister drug (PZA) are able to reduce treatment time. #LivLymeSummit
@JohnsHopkinsSPH@liv_lyme Zhang | two lab studies showing essential oils (oregano, cinnamon bark and clove bud) are able to eradicate persister cells in Lyme disease. Moving towards a mouse model to test these in combination with antibiotics -> lymedisease.org/lyme-sci-essen…#LivLymeSummit
@JohnsHopkinsSPH@liv_lyme Zhang | new model for PTLDS proposes that some patients may be infected with persister form of spirochetes at the onset. Divides PTLDS into two groups 1) persister cell/biofilm mediated infection immune response; 2) Late diagnosis Lyme with persister cells. #LivLymeSummit
@JohnsHopkinsSPH@liv_lyme Zhang | Embers study is able to show persistent infection in mouse model by xenodiagnosis (clean tick able to obtain Borrelia from mouse after treatment w/ Abx). Mouse model developed persister combination of drugs that work with 100% effectiveness. Ready for clinical trail.
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@Lymenews The largest study, on which the CDC based its recommendation, showed one thing—a single dose of doxycycline reduced the incidence of rash in a small group of people. That’s it. (Nadelman 2001) 2/
@Lymenews End point: "Erythema migrans occurred at the site of the tick bite in 8 of the 247 subjects in the placebo group (3.2 percent), as compared with 1 of the 235 subjects in the doxycycline group (0.4 percent, P<0.04)" Seven fewer rashes! nejm.org/doi/10.1056/NE…
@Lymenews The ticks in the Nadelman study were identified by an entomologist. As the authors pointed out, patients and clinicians are not skilled at distinguishing I. scapularis from other ticks and arthropods, and even from scabs or debris. (Sood 1997) 4/
"In the USA, B. burgdorferi often disseminates in the blood during the first few weeks of infection in a process that requires the binding of Borrelia surface adhesins to host integrins on the vascular endothelium28–30. " 2/
"As shown in mice, the spread of B. burgdorferi through the vasculature or lymphatics is dependent on the inter-actions of spirochaetal surface molecules and endothe-lial cell membrane proteins." 3/
Thread: A major barrier to progress in understanding the neurologic manifestations of #LymeDisease has been a lack of a tractable laboratory animal model to evaluate the mechanisms of central nervous system pathogenesis.
For decades we have seen study after study of Lyme arthritis. As it turns out the most frequently reported Lyme symptoms are neurological symptoms: memory loss and cognitive impairment, sleep impairment, psychiatric manifestations, headaches, neuropathy and more. 2/
This is the first study, to my knowledge, that shows how Borrelia burgdorferi gets into the central nervous system, how the immune system responds, and how the bacteria adapt to the immune system. #Lyme
Meet the researcher Catherine Brissette, Ph.D. globallymealliance.org/meet-researche…
In an encouraging development yesterday @CDC_NCEZID representative Ben Beard made an important announcement--a new "national strategy" for vector-borne diseases. I'll explain in a thread 1/n lymedisease.org/framework-vect… via @Lymenews
The Kay Hagan Tick Act, passed in 2019, called for @hhs to develop a national strategy to address issues related to vector-borne diseases. The Lyme community fought hard for the passage of the #TICKactlymedisease.org/tick-act-appro… via @Lymenews 2/
The geothermal features in Yellowstone are amongst my top 10 favorite sites on this planet. Here’s a bit of #microbio history on the PCR test I’d like to share.
Pictured: Grand Prismatic at the Midway Geyser Basin @YellowstoneNPS
“Until the 1980s, our ability to study DNA was limited. Things we take for granted today such as DNA fingerprinting to identify criminals, DNA medical diagnoses, DNA-based studies of nature, and genetic engineering did not exist.”
“But in 1985, the polymerase chain reaction (PCR) was invented. PCR is an artificial way to do something that living things do every day—replicate DNA. PCR is the rocket ship of replication, because it allows scientists to make billions of copies of a piece of DNA in a few hours.