The tragic death of 16-year-old Jeremy, the first officially recorded fatality from tick-induced mammalian meat allergy (MMA) globally, serves as a stark warning about a condition that is often misdiagnosed and poses an underestimated threat, particularly when intertwined with asthma. His story underscores the critical need for increased awareness, improved diagnostic protocols, and understanding of this stealthy allergen.
The passing of Jeremy, a vibrant 16-year-old, from tick-induced mammalian meat allergy (MMA) marks a somber milestone as the first officially recorded death attributed to this condition worldwide. His mother, Myfanwy Webb, carries the profound weight of regret, looking back at her son’s 15th birthday party five years prior as a pivotal, missed opportunity. Hours after a celebratory restaurant lunch, Jeremy experienced severe breathing difficulties and vomiting, prompting an emergency call. At the hospital, doctors suspected a meat allergy but ultimately attributed the episode to his pre-existing asthma, sending him home the following day. Myfanwy now reflects on that decision, wishing she had insisted on further testing, which might have revealed the true nature of his anaphylactic reaction and potentially equipped him with a life-saving EpiPen. Just over a year later, in June 2022, Jeremy tragically died after consuming a beef sausage during a camping trip with friends near Sydney.
Initially, his death was attributed solely to asthma. However, a coroner’s inquest, tirelessly pursued by his grieving family, delivered a groundbreaking ruling in February: Jeremy’s fatal anaphylaxis and subsequent asthma attack were directly triggered by tick-induced mammalian meat allergy, also known as alpha-gal syndrome. This ruling not only provided clarity for his family but also elevated MMA from a rare and perplexing condition to a potentially lethal global health concern.
Mammalian meat allergy (MMA) is an allergic reaction to alpha-gal, a sugar molecule found in most mammalian meat (such as beef, pork, lamb, and venison) and mammalian products. Unlike most food allergies that manifest almost immediately, MMA symptoms often appear hours after consumption, making diagnosis particularly challenging. Symptoms can vary widely in severity, from mild skin rashes, hives, and swelling to more severe gastrointestinal issues like stomach cramps and vomiting, and critically, life-threatening anaphylaxis. Myfanwy Webb had long harbored suspicions about her son’s meat sensitivity, noting his nausea after eating meat or even inhaling the fumes from roast meat since he was around 10 years old – an episode she believes may have triggered the reaction after his birthday party. He had also been hospitalized after eating marshmallows, which frequently contain gelatin derived from animal parts. However, without formal diagnosis, the family was unaware of the potentially fatal implications. Myfanwy describes it, in retrospect, as "like a ticking time bomb," emphasizing that early research available to her did not suggest anything beyond a food intolerance.
The scientific understanding of MMA began nearly two decades ago with Professor Sheryl van Nunen, an Australian allergist. Working in her Sydney clinic, she observed a curious correlation among her patients and subsequently discovered the groundbreaking link between tick bites and the development of MMA. The eastern paralysis tick, prevalent on Australia’s east coast, specifically in regions north of Sydney, is the primary culprit in Australia. Professor van Nunen explains that after just two bites from this tick, 50% of individuals develop antibodies to alpha-gal, a sugar molecule present in the tick’s saliva. Of those, 15 to 20% then become allergic to mammalian meat. "If only people knew what a tick could do," she laments, highlighting the preventable nature of this condition. Jeremy, having grown up surrounded by dense bushland at his family home north of Sydney, had been bitten by ticks since early childhood, unknowingly predisposing him to this silent threat.
Australia’s east coast, particularly areas north of Sydney, stands out as one of the world’s two major MMA hotspots, with the other being in the United States. In some Australian localities, the prevalence can exceed 700 sufferers per 100,000 people. Dr. Alex Gofton, a tick expert who spearheaded a recent study on the allergy, posits several hypotheses for this concentrated occurrence. He suggests that increased human-tick interaction is a significant factor, driven by a dramatic rise in population in these tick-endemic areas over the past two to three decades. Furthermore, the period between 2020 and 2023 saw consecutive La Niña years, creating wet conditions highly favorable for tick proliferation. Coinciding with this, the COVID-19 pandemic spurred a demographic shift, with more people relocating from urban centers to bushland environments, further escalating exposure. Dr. Gofton also notes that the high rate of diagnosis—a 22% annual increase in cases since 2020—is likely influenced by heightened public awareness and improved testing capabilities. Based on laboratory data, he estimates over 5,000 suspected MMA cases in Australia, a figure he believes still underrepresents the true prevalence.
Despite growing awareness, diagnosing MMA remains a complex challenge. A key factor is the delayed onset of symptoms, often occurring several hours after an evening meal, making it difficult for individuals to connect their discomfort to food. For those with asthma, the symptoms can easily be confused, leading to misdiagnosis. Professor van Nunen aptly describes MMA as "an anytime but not an every time allergy," emphasizing its unpredictable nature. Symptoms may not appear consistently, and their severity can be influenced by a multitude of factors, including the type and preparation of meat, the presence of spices, alcohol consumption, post-meal exercise, and even sleep deprivation. The spectrum of triggers extends beyond direct meat consumption. Highly sensitive individuals can react to various mammalian products, such as milk, or derivatives found in everyday items like beauty products and laundry softeners containing lanolin, or even supermarket plastic bags with stearic acid. Inhalation of barbecue fumes or petting cats and dogs can also provoke allergic reactions.
The lived experience of MMA sufferers is fraught with anxiety and significant lifestyle adjustments. Elizabeth Rowley, a mother of three from Hannam Vale, New South Wales, endured years of dismissive medical consultations for a mystery illness that began in 2006. Her symptoms were debilitating, ranging from memory loss and brain fog to chest pain, numbness in her arms, full-body aches, and breathing difficulties that frequently caused her to lose consciousness. She recalls doctors telling her, "’You’re turning into a bit of a hypochondriac – it’s not anaphylaxis – get over it’." The mental toll of seeking answers and feeling invalidated was immense, leading her to create a Facebook support group for fellow sufferers. "It’s just mentally horrendous more than anything, just trying to find out what it was," she shares. "I thought I was going crazy." Remy Williams, a 23-year-old psychology student from Sydney’s Northern Beaches, diagnosed with MMA as a child, found that the constant vigilance required for her diet escalated into an eating disorder. However, the profound impact, she notes, was witnessing her mother, also an MMA sufferer, twice experience severe anaphylactic attacks on airplanes. "It was incredibly scary," Remy recounts, describing how her mother "literally almost died in front of me."
Navigating daily life with so many potential triggers presents formidable challenges. Elizabeth Rowley struggled to secure employment as a bookkeeper, as many workplaces proved unsuitable due to allergen exposure. Shopping centers were off-limits due to restaurant fumes, and even in smaller office environments, colleagues’ eating habits could affect her. She recalls one boss’s morning toast habit becoming a daily ordeal: "As soon as the butter hits it, I just go…" she groans, frustrated by the impossibility of constantly asking colleagues to alter their routines. Social gatherings, often centered around food, become minefields. "You can’t do barbecues," Rowley states, "Can’t do some restaurants either, or most restaurants."
Professor van Nunen’s most pressing concern revolves around the vast majority—an estimated 85%—of individuals who have developed alpha-gal antibodies but remain unaware of their allergy because they haven’t yet reacted to meat. This demographic represents a significant hidden danger, as MMA can manifest unexpectedly, potentially triggered by medical treatments. Many pharmaceuticals, including certain vaccines containing gelatin and specific drugs like cetuximab used for colon cancer, contain animal-derived products. There are documented cases of fatalities linked to these medical exposures, including at least one person who died from anaphylaxis after receiving cetuximab and another after a blood transfusion. Professor van Nunen asserts that there have been more MMA-related deaths than officially recognized, with the best-documented cases being Jeremy’s and that of an American airline pilot who died hours after eating a hamburger in 2024. A critical takeaway from Jeremy’s death, she emphasizes, is that 94.8% of people who die from food allergy anaphylaxis do so because it triggers their asthma. This interaction can rapidly lead to "status asthmaticus," a severe, prolonged asthma attack that, without intubation within minutes, can result in respiratory arrest and irreversible brain damage.
In the wake of her son’s death, Myfanwy Webb has found strength in Jeremy’s "positive spin" on life, his determination to "fit everything into it, wouldn’t waste a minute." This ethos now fuels her resolve to raise awareness about MMA and advocate for improved treatment protocols, aiming to spare other families from similar heartbreak. Beyond speaking publicly about Jeremy’s story, Webb has actively collaborated with the hospital where he was treated to develop comprehensive training on MMA for medical staff. She is also co-authoring a paper with Professor van Nunen, slated for presentation at an upcoming conference. "Now [Jeremy’s] positive spin is actually helping people, even though he’s passed," she reflects. "I think he’d be really pleased with us."
How to avoid tick bites:
To prevent tick bites and reduce the risk of MMA, it is crucial to take precautions, especially when in tick-prone areas such as bushland, tall grass, or dense vegetation.
- Wear protective clothing: When outdoors, wear long-sleeved shirts and long pants, tucking pants into socks or boots.
- Use insect repellent: Apply repellents containing DEET, picaridin, or permethrin (on clothing, not skin) according to product instructions.
- Stay on marked trails: Avoid walking through tall grass and dense undergrowth where ticks are more likely to reside.
- Check for ticks: After spending time outdoors, thoroughly check your body, hair, and clothing for ticks. Pay close attention to warm, moist areas like armpits, groin, behind the knees, and scalp.
- Shower soon after coming indoors: Showering within two hours of coming indoors can help wash off unattached ticks.
- Remove ticks safely: If you find a tick, remove it promptly and carefully using fine-tipped tweezers, grasping it as close to the skin’s surface as possible and pulling upward with steady, even pressure. Avoid crushing, twisting, or irritating the tick.
- Be aware of pets: Check pets regularly for ticks, as they can bring ticks into the home.
