Archive for the ‘Ticks’ Category

Lyme Disease Prevalence: Does Sex Matter?

https://www.lymedisease.org/lyme-disease-prevalence-gender-bias/

Gender bias is now a widely recognized problem in research. Sometimes this happens because women haven’t been studied in the first place. Even when they have been included in the research, their results may not be analyzed separately from those of men. Because of this, we don’t know much about how women differ from men in how they contract a disease, are diagnosed, or respond to treatment.

Is this an issue in Lyme disease? Are women more likely to get Lyme disease, more difficult to diagnose, or more prone to treatment failure? We decided to launch a research study using data from the MyLymeData patient registry. To kick off the study, we asked Dr. Raphael Stricker to explain how males and females with Lyme disease might differ. His video presentation is included below.

Lyme Disease Gender Differences

Dr. Stricker identified four major areas in Lyme disease where males and females are not alike:

  • Women may attract more ticks and have more atypical Lyme rashes than men (Josek 2019).
  • Commercial two-tier Lyme testing favors men over women, because men have more positive ELISA tests and more positive Western blots (Feder 1992, Rebman 2015, Schwarzwalder 2010).
  • Women have an exaggerated response to Borrelia infection, with more inflammatory and inhibitory cytokines than men. This may promote the evolution of chronic Lyme disease. (Jarefors 2006).
  • Women may have a higher treatment failure rate.

Lyme Tests Are Biased To Detect More Males

The CDC Western blot criteria requires that 5 of 10 bands react for a lab test to be considered positive. A study by Feder, showed that men tend to have 6 positive bands, while women have only 4 positive bands. These women will not test positive for Lyme disease or receive the timely diagnosis and treatment needed to get well (Stricker, Johnson 2009).

Lyme Disease Prevalence — Almost Twice As Many Females As Males

According to the CDC, most reported surveillance cases are male—58% males vs 42% females. The CDC statistics also show a bimodal distribution of Lyme disease — with children and adults over 50 reporting the most cases. Both of these assumptions have recently been called into question by other big data studies.

For example, FAIR Health, one of the largest insurance claims data bases, recently released a report on Lyme disease that shows more insurance claim lines with Lyme disease diagnoses were submitted for females than males and females do not have a bimodal age distribution. In fact, between the ages of 23-50, there were almost twice as many females as males with Lyme disease. (FAIR Health 2019).

Lyme Disease Prevalence - for some ages (23-50), there were almost twice as many females as males with Lyme disease

Tick-Bite Victim Slowly Recovering, Thankful For Community Support

https://www.fredericksburg.com/news/local/update-tick-bite-victim-slowly-recovering-thankful-for-community-support/article

COMMUNITY COMES TO THE AID OF LOCAL MAN

UPDATE: Tick-bite victim slowly recovering, thankful for community support

Disease-Causing Tick Common Along Gulf Coast Is Now In Indiana, IU Experts Say

https://www.indystar.com/story/news/health/2019/12/23/gulf-coast-tick-now-indiana/

Disease-causing tick common along Gulf Coast is now in Indiana, IU experts say

Indiana University researchers have found a Gulf Coast tick in southern Indiana.

As the name suggests, this species of arachnid is primarily found in states that border the Gulf of Mexico. Its presence in Indiana could signify an expanded range, and for Hoosiers that would mean an increased risk of contracting a nasty disease.

Tidewater fever, or rickettsia parkeri, is a form of Rocky Mountain spotted fever. Both illnesses can result in fever, headache, rash and muscle aches.

“It’s not as bad as Rocky Mountain spotted fever, but it’s something you don’t want to get, for sure,” said Keith Clay, IU distinguished professor emeritus of biology.

Clay recently left IU after more than three decades to become chair of the Department of Ecology and Evolutionary Biology at Tulane University. He still leads IU’s Project Vector Shield, an initiative started in 2018 that collects ticks and mosquitoes from sites throughout Indiana.

The goal is to provide early warning for disease vectors that pose a threat to people and livestock. The project is part of IU’s Prepared for Environmental Change Grand Challenge initiative.

IU study: We have more ticks here that carry Lyme disease than thought

Tick season: What you need to know to keep yourself, and your dog, safe

Ticks and mosquitoes are collected during the growing season — roughly April through October — at 10 sites scattered across southern Indiana. Researchers regularly perform what’s known in the tick world as dragging or flagging at each site during the growing season, Clay said.

This technique consists of slowly dragging a heavy, white corduroy cloth across an area of vegetation. If ticks are present, they will instinctively grab onto the cloth, thinking it’s a deer, a dog or some other creature that could provide a blood meal.

“Maybe you get none, maybe one or two, and sometimes you hit a hot spot and get 500 on a cloth,” Clay said. “It’s kind of like fishing.”

When ticks are found on a cloth, they’re collected with tweezers and placed in sample tubes with 70% ethanol. This kills the ticks instantly while preserving them until they can be analyzed at an IU lab. There, the ticks are sorted by species, sex and life stage.

When Clay started looking at ticks in the late 1990s, the dog tick was the only species found in this area. Since then, the lone star tick population has exploded. It’s by far the most common species found in Indiana today, Clay said.

Recently, the blacklegged deer tick, which transmits Lyme disease, has become more common, particularly in the southern part of the state.

A student who was sorting ticks in the IU lab recently noticed one that looked different. Clay thought it was a Gulf Coast tick, but he wanted to be sure. High-resolution photos of the bug were taken and sent to the U.S. National Tick Collection at Georgia Southern University.

“It took an expert about 10 seconds to identify it,” Clay said.

At first, Vector Shield researchers thought this was the first Gulf Coast tick found in Indiana. This was based on the Centers for Disease Control and Prevention maps of tick distribution, Clay said.

It turned out the Indiana State Department of Health had previously found a Gulf Coast tick in Gibson County. That’s just north of Posey County, the source of the tick IU researchers discovered.

“Two ticks don’t make for an invasion, but it’s at least plausible that there’s a lot more of them out there,” Clay said.

It’s not exactly clear what’s causing the increase of tick diversity in Indiana. Climate change is one likely factor. Winters aren’t as severe and don’t last as long, Clay said. This extends the growing season and the time that ticks — along with other animals they may latch on to — are active.

Changing landscapes could also play a role. Southern Indiana was once all forest, Clay said. Development and farming has transformed the region into more of a patchwork. Grasslands and scrubby areas are where ticks tend to thrive, he said.

Like other animals, ticks tend to follow their food. The deer population, as well as livestock, has increased dramatically over the past 300 years, Clay said.

Of course, both of the Gulf Coast ticks found in Indiana could be random occurrences in which the bugs latched on to someone or something that traveled north from the southern U.S.

“Maybe they don’t persist and form a viable population,” Clay said, “but it certainly warrants a closer look.”

Integrated Tick Management Reduces Ticks by 93% Study Finds

https://www.ncbi.nlm.nih.gov/pubmed/31853763

2019 Dec 18. doi: 10.1007/s10493-019-00452-7. [Epub ahead of print]

Evaluating the effectiveness of an integrated tick management approach on multiple pathogen infection in Ixodes scapularis questing nymphs and larvae parasitizing white-footed mice.

Abstract

We investigated the effectiveness of integrated tick management (ITM) approaches in reducing the burden of infection with Borrelia burgdorferi, Babesia microti, and Anaplasma phagocytophilum in Ixodes scapularis. We found a

  • 52% reduction in encountering a questing nymph in the Metarhizium anisopliae (Met52) and fipronil rodent bait box treatment combination as well as a
  • 51% reduction in the combined white-tailed deer (Odocoileus virginianus) removal, Met52, and fipronil rodent bait box treatment compared to the control treatment.
  • The Met52 and fipronil rodent bait box treatment combination reduced the encounter potential with a questing nymph infected with any pathogen by 53%.
  • Compared to the control treatment, the odds of collecting a parasitizing I. scapularis infected with any pathogen from a white-footed mouse (Peromyscus leucopus) was reduced by 90% in the combined deer removal, Met52, and fipronil rodent bait box treatment and by
  • 93% in the Met52 and fipronil rodent bait box treatment combination.
Our study highlights the utility of these ITM measures in reducing both the abundance of juvenile I. scapularis and infection with the aforementioned pathogens.

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For more:  https://madisonarealymesupportgroup.com/2019/04/12/tick-prevention-2019/

https://madisonarealymesupportgroup.com/2019/07/18/frequent-prescribed-fires-can-reduce-risk-of-tick-borne-diseases/

https://madisonarealymesupportgroup.com/2018/04/03/fire-good-news-for-tick-reduction/

https://madisonarealymesupportgroup.com/2018/05/27/study-conforms-permethrin-causes-ticks-to-drop-off-clothing/

https://madisonarealymesupportgroup.com/2019/06/16/study-shows-effectiveness-of-factory-treated-permethrin-impregnated-clothing-works/

https://madisonarealymesupportgroup.com/2019/08/09/military-eyes-bug-repellent-coating-to-replace-permethrin-in-uniforms/

 

After 4 Painful Years, CNY Woman’s Mystery Illness Finally Traced to Rare Tick-borne Bacteria (which isn’t rare)

https://www.syracuse.com/health/2019/12/after-four-painful-years-a-cny-womans-mystery-illness-finally-solved.html

After 4 painful years, CNY woman’s mystery illness finally traced to rare tick-borne bacteria

Rare tick borne disease ravaged young woman’s health

“It was like the flu, but for only four days straight,” recalled Allyn, 22, of Skaneateles. “They would test for strep, they would test for mono, and everything would be negative. We thought it was just some weird virus.”

Every few months, the fever returned and disappeared after four days. Until the fall of 2017, when Allyn was a junior at Colgate. This time, the fever stayed, and brought along fatigue and excruciating pain in her joints and muscles.

“You know when you have the flu and your body aches? It was like that times a million,” said Allyn, who was a runner in high school. “I was an extreme athlete, and I couldn’t walk up my stairs to my room anymore. We could tell something was terribly wrong.”

The quest to understand what was wrong, and how to cure it, has consumed Allyn’s life. Since that first fever, Allyn has suffered severe migraines, tingling in her arms and legs that felt like bugs crawling beneath her skin, extreme fatigue, heart palpitations, shortness of breath so constricting that she gasped for air after a flight of stairs, inability to concentrate, and anxiety attacks that convinced her she was dying.

Allyn has seen neurologists, Lyme disease specialists, acupuncturists and chiropractors. She’s been diagnosed with strep throat, chronic fatigue syndrome and Lyme disease. She took dozens of supplements and antibiotics, drank celery juice every morning for four months, and even shut herself inside a claustrophobic hyperbaric chamber in Florida.

Nothing worked.

No one could understand what had turned a star high school athlete into a young woman so sick she couldn’t climb the 10 stairs to her childhood bedroom, or why she wasn’t getting better.

“Those are the darkest days, when you’re trying everything and nothing is working,” said Allyn’s mother, Meg O’Connell. “As a parent you want to shake the doctors and say, ‘You have to take care of my child right now!’”

Finally, this summer, Allyn got a definitive answer. She was diagnosed as one of the first two people in Central New York to contract an emerging tick-borne disease called miyamotoi.

Miyamotoi is so new that, unlike Lyme disease, it doesn’t have a common name, but is referred to simply the species of the bacterium that causes it. It’s in the same genus as the Lyme bacterium, but is more closely related to a group of diseases known as tick-borne relapsing fever.

Tick populations are increasing in Upstate New York, and they are bringing debilitating disease to tens of thousands of people. If it wasn’t bad enough that deer ticks already carried six bacteria and viruses, they and miyamotoi have now evolved to add a new weapon to the arsenal.

Miyamotoi infections were first found in humans in 2011 and confirmed in the Northeast in 2013. Scientists are still studying how it’s transmitted, and many doctors are unfamiliar with the disease, said Brian Leydet, a professor and tick expert at SUNY College of Environmental Science and Forestry, in Syracuse.

“That’s what’s terrifying about it: knowing so little about it, and it’s in our back yard,” Leydet said.

Like many people suffering from tick-borne diseases, Allyn doesn’t remember being bitten. She suspects she picked up the tick while hiking or running trails, and that it hid beneath her long blond hair. Ticks seek out hard-to-see places on the body, like the scalp or behind the knees, and then attach to the skin for 24 to 48 hours, sucking blood and disgorging pathogens.

Allyn also doesn’t remember the date of the first fever, but she lucidly recalls the day the illness took over her life: Oct. 6, 2017, a date she mourns each year. She was walking down the long hill from Colgate to the village of Hamilton when she was overcome with pain and massive fatigue.

“I had to sit down because I didn’t think I could walk the rest of the way home,” she recalled. “I was just having shooting pain all through my muscles and knees and elbows. It felt like everything was breaking in my body.”

She couldn’t focus enough to drive, so her parents brought her home to Skaneateles. She saw a nurse practitioner in Syracuse whom Allyn had worked for, Carolyn Christie-McAuliffe. She drew 30 vials of blood, Allyn recalled.

Allyn returned to Colgate, hoping it was just a case of mononucleosis that would go away so she could finish her junior year. Then the test results came in. The first one, Allyn recalled, counted the markers of inflammation in her body.

“The normal range is about 40 to 60. Mine was 800,” she said. “Carolyn called me and said, ‘You have to go home immediately. Something is really wrong.’”

Allyn took a medical leave from Colgate and returned home yet again. Three days later McAuliffe called with a diagnosis: Lyme disease. There was something odd about the test results, though, that would later become an important clue. While the initial screening test was positive for Lyme, the confirmatory test, called the Western blot, was abnormal, but negative for Lyme, Allyn said.

Allyn went on a four-week course of doxycycline, the standard regimen for Lyme patients. She only felt worse; now the disease was enveloping her brain in a fog.

“I would wake up every morning and not remember what I did,” she recalled. “I’d be watching a TV show I’d been watching for years and I wouldn’t know what was happening. I couldn’t read because I couldn’t concentrate, and I couldn’t really understand words. Most of the days I would lay awake in bed staring at the wall.”

The shattering knee and elbow pain returned. She had “horrible migraines.” She was short of breath and her heart started skipping beats. Her legs and arms tingled with pins and needles. Sitting home alone, Allyn developed paranoia and panic attacks, calling her parents in the middle of the day to say she was dying.

O’Connell remembers her own pain watching her daughter’s.

“It’s just so sad to see someone struggle for two-plus years,” said O’Connell, executive director of the Allyn Foundation. “When you have an ill child, you just want to take that burden from them. You ask, ‘Why couldn’t that have happened to me instead?’”

O’Connell had joined the CNY Lyme and Tick-Borne Disease Alliance. At an early meeting of the alliance, O’Connell met Dr. Kris Paolino, a new physician at Upstate Medical University who specialized in Lyme cases. Paolino, an infectious disease specialist, had helped develop vaccines for Ebola and malaria at the Walter Reed Army Institute of Research in Washington, D.C.

“I happened to say to him that my daughter has Lyme and we can’t get rid of these fevers,” O’Connell recalled. “He said, ‘Make an appointment and come see me.’”

At that first appointment, Allyn recounted her frustrating and painful journey.

“The main thing I try to do is to listen to the patient’s story first,” said Paolino, hired in 2016 as part of Upstate’s battle against the growing threat of tick-borne disease. “In many cases you’re trying to figure out what’s real and what’s not.”

As Allyn’s story unfolded, Paolino noted the clues that raised doubt about the Lyme diagnosis: the relapsing fevers, the neurological symptoms, and that ambiguous Western blot test.

Those suggested miyamotoi. Another round of tests confirmed it.

“I’m not sure if she had ever had Lyme,” Paolino said. “I think it was probably miyamotoi all this time.”

It’s not hard to understand why doctors would suspect Lyme over miyamotoi. The abnormal Western blot test result after a positive Lyme test can be confounding, and miyamotoi is almost unheard of. Just 10 cases of miyamotoi were reported to the state health department from 2001 to 2016, compared to nearly 80,000 cases of Lyme disease.

Paolino said he has now four miyamotoi patients.

“I think there’s probably more people that are undiagnosed than we think,” he said. “It is a fairly new emerging pathogen in the region.”

Paolino prescribed an intense regimen of intravenous antibiotics for Allyn. First doctors inserted a thin tube that ran from Allyn’s upper right arm to her heart. Every night for seven weeks, she said, she spent a half hour pumping two syringes of the antibiotic ceftriaxone into the tube.

The treatment seems to be helping, Allyn and O’Connell said.

“As Dr. Paolino said, ‘Don’t go out and run a marathon yet,’ but we have been really encouraged,” O’Connell said. “She has not had a fever, her blood work is better, her glands are not swollen. She can take longer walks. It will still be another six to 12 months to build up her body because all of it’s been through, but I would say we’re hopefully optimistic.”

No one knows yet if Allyn is cured, what damage the years of treatments might have caused, or if her symptoms will linger even if the bacteria are gone. Paolino said there’s reason for optimism because relapsing fever diseases similar to miyamotoi can be cured by antibiotics. Miyamotoi is so new, however, there’s little research on how patients fare if the disease has been left untreated for years.

“The longer the symptoms are present, you see more damage to the nerves and more damage to the joints that could be more of an irreversible process,” Paolino said. “The hope is that she’ll continue to feel well and she won’t relapse, but I don’t have a definitive answer.”

Fatigue remains a constant presence, Allyn said, but she is slowly regaining strength. She can take her 8-month-old German shepherd, Oaklie, for two walks a day now. She has been attending Colgate part-time, and can do homework in the morning before she gets too tired.

“I’ve gotten a little bit better, but how much better will I get?” she wonders.

It’s time, she said, to find out. On Saturday, she and her boyfriend moved to Boulder, Colorado, where Allyn has an aunt and uncle. She plans to complete her Colgate degree in education and cellular neuroscience by taking her final three classes at the University of Colorado. She’s not ready for a 9-to-5 job, and doesn’t know when she will be, but she hopes to start part-time in a café or bakery. And as she gets stronger, Allyn hopes to put on skis and hiking boots again.

“Life is so short and you could get sick any day,” she said. “Why not go for a hike or go skiing?”

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For more:  https://madisonarealymesupportgroup.com/2018/08/17/borrelia-miyamotoi-found-to-occur-nationwide-in-japan/

https://madisonarealymesupportgroup.com/2018/02/15/b-miyamotoi-in-ca-ticks-for-a-long-time/The following article explains that Borrelia Miyamotoi is not new to California.  

First considered nonpathogenic, it wasn’t even reported until 2011 in Russia.  http://www.nejm.org/doi/full/10.1056/NEJMc1215469  Diagnosis relies on PCR testing during acute infection and two-tiered testing for Lyme will not pick it up. 

It is not a reportable illness so prevalence is pure conjecture.  

Dr. Horowitz states clinicians should be vigilant for clinical pictures that look like viral infections such as high fever, headache, and muscle and joint pain.  

In publications, only 16% of patients presenting with BMD were seropositive for IgG and/or IgM antibody to B. miyamotoi rGlpQ, so PCR should also be considered in patients with a history of tick bites and appropriate clinical manifestations.

This is also an important reminder that new strains and species are being discovered continually, so nothing about Tick Borne Illness should be set in stone and open minds are a must.

https://madisonarealymesupportgroup.com/2018/02/14/borrelia-miyamotoi-in-ca-serodiagnosis-is-complicated-by-multiple-endemic-borrelia-species/ (Study found here)

https://www.lymedisease.org/lyme-sci-study-finds-lots-b-miyamotoi-california-ticks/