Tick-induced mammalian meat allergy has become an emergent allergy world-wide after van Nunen et al. first described the association between tick bites and the development of mammalian meat allergy in 2007. Cases of mammalian meat allergy have now been reported on all 6 continents where humans are bitten by ticks, in 17 countries - Australia, United States of America (USA), Europe (France, Spain, Germany, Belgium, Switzerland, Sweden, United Kingdom, Italy, and Norway), Asia (Korea and Japan), Central America (Panama), South America (Brazil), and Africa (South Africa and Ivory Coast). To date, in each of these countries, bites from only a single tick species have been linked to the development of mammalian meat allergy: <i>Ixodes holocyclus</i> (Australia), <i>Amblyomma americanum</i> (USA), <i>Ixodes ricinus</i> (Europe), and <i>Ixodes cajennense</i> (Panama) are confirmed as culprits, and <i>Ixodes nipponensis</i> (Japan and Korea), <i>Amblyomma sculptum</i> (Brazil), <i>Amblyomma variegatum</i> (Ivory Coast), and <i>Haemaphysalis longicornis</i> (Japan) suspected of provoking mammalian meat allergy after tick bite. Other tick species remain to be formally identified (South Africa). Identification of tick species associated with development of mammalian meat allergy is crucial to the uptake of public health measures to prevent tick bites from culprit tick species, for both individuals living in these tick-endemic areas and those who choose to visit these regions. We report a tick associated with the enhancement of mammalian meat anaphylaxis after tick bite which is novel for both Australia and the world and establishes <i>Ixodes</i> (<i>Endopalpiger</i>) <i>australiensis</i> as a second tick species associated with mammalian meat allergy in Australia.

Red meat is the muscle meat of mammals like beef, lamb, and pork that is red due to the abundance of myoglobin pigment and becomes even darker when cooked. The global average per capita consumption of meat and the total amount of meat consumed is rising, and there has been a particularly marked increase in the global consumption of chicken and pork. The consumption of red meat has always been a contentious issue, with data suggesting benefits in terms of nutritional value and at the same time linking its consumption to major health disorders such as endocrine abnormalities, gastrointestinal issues, cancers, and cardiovascular diseases (CVDs). Despite being normalized by major food franchises, red meat consumption may lead to adverse cardiovascular outcomes such as atherosclerosis, ischemic heart disease, stroke, and cardiac failure. Given the evidence that indicates the consumption of red and processed meat as a risk factor for cardiovascular diseases and all-cause mortality, it is important to review the effects of red meat on the risk of cardiovascular diseases.

Immunology. "Alpha-gal and Red Meat Allergy." Accessed June 10, 2025. Healio. "Alpha-gal in health products triggers anaphylaxis in half of alpha-gal syndrome Alpha-gal syndrome (AGS), also known as alpha-gal allergy or mammalian meat allergy (MMA), is an acquired allergy to the epitope of the carbohydrate molecule galactose-alpha-1,3-galactose ("alpha-gal"). Reactions can be life-threatening, and typically either begin rapidly after exposure from intravenous therapy, or 2–8 hours after ingesting foods and medicines. Reactions can also occur from skin c Reactions to alpha-gal in food or medicine typically have a delayed onset, beginning 2–8 hours after consumption. After the delayed onset, the allergic response is like most IgE-mediated food allergies, including severe whole-body itching, hives, angioedema, gastrointestinal upset, and possible anaphylaxis. Anaphylactic reactions are seen in approximately 60% of afflicted individuals. Some cases feature gastrointestinal symptoms without pruritus, hives, or other skin involvement. This presentation is not typical of food allergies, which can make the initial suspicion of alpha-gal syndrome less likely. It can lead to misdiagnosis of irritable bowel syndrome. American guidelines published in 2023 recommended physicians suspect alpha-gal syndrome in cases with abdominal pain and GI symptoms, but without traditional allergy symptoms like hives. In 70% of cases, the reaction is accompanied by respiratory distress and is particularly harmful to those with asthma. The severity of reaction to alpha-gal has been found to correlate with the amount of alpha-gal in the ingested food or drug. However, for many patients, not every exposure to alpha-gal results in an allergic reaction. Symptoms and sensitivity to reactions vary greatly among individuals. Other factors, including exercise and alcohol consumption, can affect an individual's symptoms and reactivity to alpha-gal. Alpha-gal is a natural component of food ingredients made from mammals such as beef, pork, lamb, venison, rabbit, gelatin, and milk. Individuals with an alpha-gal allergy may still consume reptile meats, insects, poultry, and seafood that naturally do not contain alpha-gal. The alpha-gal molecule can also be found in certain seaweeds. Carrageenan is the name for a group of linear sulfated polysaccharides that are extracted from red algae, or red seaweed. Carrageenan contains the alpha-gal epitope that some people with alpha-gal syndrome react to. Carrageenan is used for gelling, thickening, and stabilizing, as well as for clarifying beer, juice, and wine. Carrageenan is also sprayed on fruit and vegetables, and applied to fish to help them retain water. It can also be found in medications, medical…

<h4>Background</h4>Meat allergies, though less common than other food allergies, can be difficult to diagnose due to cross-reactivity among different types of meat and varying immunological responses. Alternative protein sources, including plant-based and nonmammalian animal proteins, are being explored as safer dietary options for individuals with meat allergies.<h4>Objective</h4>The purpose of this study is to comprehensively examine the characteristics of allergic reactions to chicken, beef, and pork meat and evaluate the effectiveness of alternative protein sources in improving the diagnosis and management of meat allergies.<h4>Methods</h4>The study covers various clinical manifestations of allergies, including skin rashes, respiratory symptoms (such as shortness of breath and rhinitis), and gastrointestinal disorders. The analysis of the immunological mechanisms underlying these reactions is conducted, with special emphasis on specific proteins that can cause allergic reactions in predisposed people.<h4>Results and conclusion</h4>The results show that proteins such as Gal d1, present in chicken meat, have a high ability to cause IgE-mediated reactions, leading to sensibilization and the appearance of allergic symptoms. It is also determined that patients with allergies to chicken or beef may have cross-reactivity to proteins of other types of meat, which makes it difficult to accurately diagnose. In particular, patients with chicken allergies may also show a reaction to proteins present in pork and beef, which indicates the need for a more detailed approach to diagnosis. Investigating alternative protein sources, including plant proteins and proteins derived from other animals shows their potential to reduce the frequency and severity of allergic manifestations. These protein sources are considered as possible replacements that can reduce the risk of allergic reactions and facilitate dieting for patients with meat allergies. The study also highlights the need for a personalized approach to the diagnosis and treatment of meat allergies, which is an important aspect of developing more effective allergy management strategies aimed at improving the quality of life of patients.