By Sonia Isaacs
MALENY has emerged as Queensland’s leading hotspot for a little-known but potentially life-threatening tick-related allergy that leaves sufferers unable to eat red meat and also may increase their risk of heart disease.
New national research has identified the Maleny Kenilworth region as having the highest rate in the state of Mammalian Meat Allergy (MMA), also known as alpha-gal syndrome.
When adjusted for population, the hinterland community ranks as the third-worst hotspot in Australia.
The study, led by Senior Research Scientist Dr Alex Gofton from the CSIRO, analysed a decade of alpha-gal blood test results from four major pathology providers across the country.
Almost 300 cases have been recorded from the Maleny postcode alone.
Dr Gofton said the findings confirmed what many local GPs had already observed.
“We’re finding distinct geographic hotspots. The Sunshine Coast hinterland, specifically the Maleny Kenilworth area, is one of the largest we’ve identified,” he said.
MMA is a unique allergy triggered exclusively by tick bites most commonly from the paralysis tick, which is widespread along Australia’s east coast.
Unlike most food allergies, which typically develop in childhood, alpha-gal syndrome usually appears in adulthood, sometimes years after repeated tick exposure.
Tick saliva can effectively “reprogram” the immune system, sensitising it to a sugar molecule known as alpha-gal.
This molecule is found in mammalian meats including beef, lamb, pork, as well as in some dairy products, gelatine and certain medications.
Reactions are delayed, typically occurring six to eight hours after consumption.
A person might eat a steak for dinner and wake during the night with hives, severe abdominal pain, vomiting or, in some cases, full anaphylaxis.
“We more often see people on the severe side of the spectrum,” Dr Gofton said. “Many end up in emergency with respiratory or cardiovascular symptoms.”
Testing for alpha-gal began in 2014 and remained relatively steady until 2020, when case numbers began rising sharply.
Preliminary findings suggest national MMA cases have increased by around 22 per cent annually since 2020.
Unlike Lyme disease or tick typhus, MMA is not caused by bacteria or viruses.
It is an immune response to alpha-gal, a sugar found in most mammals but not in humans or primates. Once sensitised, sufferers can react to even small amounts of mammalian products.
Symptoms range from hives and swelling of the lips, face or throat to severe gastrointestinal distress, breathing difficulties and anaphylaxis.
Adding to growing concern, researchers from the University of Sydney have identified a strong association between alpha-gal antibodies and increased cardiovascular disease, including more severe heart attacks and heart attacks in younger patients.
“A large Australian study of more than 1,000 people found that those who had heart attacks were 12 times more likely to carry alpha-gal antibodies than healthy individuals,” Dr Gofton said.
“Most patients weren’t even aware they carried these antibodies, yet their immune system was responding to alpha-gal.”
CSIRO is now working with Australian Red Cross Lifeblood to test blood donors in hotspot regions such as Maleny to determine how many Australians may unknowingly carry alpha-gal antibodies and face elevated cardiovascular risk.
“With no cure and no simple labelling to avoid alpha-gal in food and medicines, prevention is critical,” Dr Gofton said.
He urged residents to be “tick aware” when in bushy tick habitats, wearing insect repellent, and choosing long sleeves and light-coloured clothing to spot ticks early.
“A tick bite is not just an annoyance. It could carry serious health implications down the track.”
Maleny resident Tor Smith is among a growing number of locals adapting to life with alpha-gal syndrome.
Her young daughter was first diagnosed after years of unexplained stomach pain and disrupted sleep.
Removing mammalian meats and dairy from her diet brought immediate relief. Soon after, Ms Smith herself was diagnosed.
The family has since removed all mammalian products from their home.
“What is striking is how common alpha-gal seems around Maleny,” she said. “My daughter has four or five friends with the condition, and about six households in our immediate neighbourhood are affected. It’s widely talked about here, even as many outside the region remain unaware of the syndrome.”
CSIRO’s ongoing research aims to establish whether tick exposure is a hidden driver of cardiovascular disease and whether broader alpha-gal screening could help identify people at risk.
For more information, on tick-bite prevention visit www.tiara.org.au or email csiroenquiries@csiro.au