Allergies

Allergies to mice and rats are a common issue, especially in lab settings or homes where these animals are kept as pets. Allergens from mice and rats—present in their urine, dander, and saliva—can become airborne and cause allergic reactions in sensitive individuals.

Mouse-Rat

Timothy grass pollen allergy is a condition caused by an immune reaction to the pollen from Timothy grass, a common grass species found in temperate regions and frequently used in hay. This allergy is a form of seasonal allergic rhinitis, with symptoms typically occurring during the grass’s pollination season, usually in late spring and early summer.

Timothy grass (pollen)

Pollen from ribwort plantain, a type of plant that can trigger respiratory allergies, especially in summer.

Ribwort plantain pollen

Wasp venom allergy is a condition that occurs when the body has an allergic reaction to a wasp sting. This allergy can cause symptoms ranging from localized pain and swelling to severe anaphylaxis. Unlike bee stings, wasp stings can be more dangerous because wasps can sting multiple times, increasing the risk of a serious allergic reaction.

Wasp venom

Crayfish allergy is an allergic reaction to proteins found in crayfish, a type of shellfish. Symptoms can range from mild to severe and, in some cases, can be life-threatening. People with a crayfish allergy may react not only from eating crayfish but also from inhaling steam released during cooking.

Crayfish

Cottonwood trees are known for producing fluffy, cotton-like seeds and pollen that can trigger seasonal allergies. In spring, their pollen becomes airborne — especially on windy days — and may cause symptoms such as sneezing, nasal congestion, and itchy eyes in sensitive individuals.

Cottonwood

Japanese hop (Humulus japonicus) is an invasive climbing vine that blooms in late summer, releasing pollen that can cause allergic reactions. This pollen significantly contributes to seasonal allergies, especially for those sensitive to it, with symptoms often becoming worse in urban areas where the plant is more common.

Japanese Hop

Acacia trees are ornamental plants that produce allergenic pollen. They usually bloom from late winter through spring, releasing pollen that can trigger seasonal allergy symptoms. People living in areas with many acacia trees may experience increased allergic reactions during these blooming periods.

Acacia

Dermatophagoides farinae (D. farinae), also known as the American house dust mite, is a common allergen found in household dust. These mites are widespread in carpets, bedding, and upholstered furniture, where they feed on human skin cells. Their fecal matter and body fragments can trigger allergic reactions year-round, often contributing to allergic rhinitis and asthma.

Dermatophagoides farinae (D. farinae)

Pollen from wormwood plants, known to cause hay fever and exacerbate asthma during its blooming season.

Wormwood ambrosia pollen

Plantain weed is a common allergen found in grassy areas and should not be confused with the banana-like fruit. Its small, inconspicuous flowers release pollen that can trigger seasonal allergy symptoms. While it does not produce as much pollen as other weeds, plantain can still cause problems for individuals with specific sensitivities.

Plantain

Grass pollen that triggers many seasonal allergies, causing hay fever and asthma symptoms during its season.

Timothy grass pollen

Common ragweed is a plant known for causing fall allergies. As one of the most prolific pollen producers, ragweed can affect people even miles away from where it grows. Its high pollen levels are a leading cause of seasonal allergic rhinitis, impacting many individuals as summer turns into autumn.

Common Ragweed

Pollen from birch trees, a common trigger of hay fever, asthma, and other respiratory allergies in the spring.

Birch (pollen)

Alternaria alternata is a mold that releases spores into the air, triggering allergic reactions. It grows on a variety of plants and materials, thriving in warm, moist environments. People sensitive to this mold may experience symptoms during dry, windy conditions when spore levels peak.

Alternaria Alternata

Mold that can cause respiratory problems and exacerbate asthma, prevalent in damp environments.

Cladosporium herbarum Mold

Shellfish that is a common allergen, causing symptoms such as hives, swelling, and anaphylaxis.

King crab

Almond allergy is a condition that involves the immune system’s response to proteins found in almonds, a type of tree nut. It is one of the more common tree nut allergies and can cause symptoms ranging from mild irritation to severe, potentially life-threatening reactions.

Almond

Bermuda grass pollen allergy is an allergic reaction to the pollen produced by Bermuda grass, a common grass species found in warmer climates and frequently used in lawns, parks, and golf courses. This allergy is a type of seasonal allergic rhinitis, usually occurring during the grass pollination periods in late spring and summer.

Bermuda grass (pollen)

Pollen from ash trees, which is a common allergen during springtime. Can induce respiratory symptoms in allergic individuals.

Ash (pollen)

Penicillium notatum is a common mold known for its role in producing penicillin. In indoor environments, it can cause allergic reactions, especially in damp areas. Exposure to this mold may trigger respiratory symptoms and allergies in sensitive individuals, particularly those prone to mold-related reactions.

Penicillium notatum

Alder pollen is a common early spring allergen released by alder trees during their blooming season. This pollen can cause allergic reactions such as hay fever (allergic rhinitis) in sensitive individuals. Symptoms often worsen on dry, windy days when pollen dispersal is at its peak.

Alder

Dust mite allergen, which is a common indoor allergen causing respiratory issues and skin reactions.

Mite

Eel meat intolerance is a condition characterized by difficulty digesting eel meat, a type of seafood commonly enjoyed in various cuisines, especially in Asia and Europe. Unlike an eel meat allergy, which triggers an immune response, intolerance primarily causes digestive discomfort such as stomach pain or upset after eating eel or dishes containing it.

Russian thistle, also known as tumbleweed, is a plant whose pollen can cause seasonal allergic reactions. Its pollen is a common allergen, especially in dry regions. During blooming seasons, the lightweight pollen can travel long distances, affecting many people. Symptoms are typical of hay fever and include sneezing, itchy eyes, and a runny nose.

Russian thistle

Sheep wool allergy refers to an allergic reaction often caused not by the wool fibers themselves, but by sensitivity to lanolin (wool grease) or other substances present in the wool. These allergens can trigger symptoms when wearing clothing made from sheep’s wool or coming into contact with wool-containing products.

Sheep Wool

House dust allergies are caused by various components of dust—including dust mites, pet dander, mold spores, and pollen. These allergens can trigger symptoms that impact daily life, making it important to minimize exposure and manage the home environment effectively.

House Dust

Cheddar cheese allergy is a reaction related to cow’s milk allergy, since cheddar is made from cow’s milk. It is caused by milk proteins such as casein and whey. Recognizing the symptoms and understanding how to manage the allergy are important for those affected.

Cheddar cheese

Bee venom allergy is a condition in which the immune system overreacts to proteins in bee venom after a sting. This allergic reaction can cause symptoms ranging from mild local swelling to severe systemic effects, including life-threatening anaphylaxis. Recognizing and understanding these signs is crucial for effective management and treatment.

Bee venom

Cacao, the primary ingredient in chocolate, is enjoyed by many but can also cause allergic reactions in some individuals. An allergy to cacao can lead to various symptoms, ranging from mild skin or digestive issues to respiratory problems, and in rare cases, anaphylaxis. Understanding your body’s reaction to cacao and related products is essential for maintaining overall health and well-being.

Cacao

Walnut intolerance is a condition characterized by difficulty digesting walnuts, leading to gastrointestinal discomfort. Unlike a walnut allergy, which triggers an immune system response and can cause severe, immediate symptoms, walnut intolerance typically causes digestive problems after consuming walnuts.

Walnut

Insect allergen from cockroaches, which can contribute to respiratory issues and trigger asthma.

Cockroach

Dandelions are often seen as weeds or used as herbal remedies, but they can also trigger allergic reactions or sensitivities in some individuals. These reactions typically occur from contact with dandelion pollen or the plant itself. Being aware of this potential allergy is especially important during their peak blooming period.

Dandelion

Meat allergy is a condition in which the immune system mistakenly identifies certain proteins in meat as harmful. This triggers an allergic reaction that can range from mild to severe. Unlike food intolerances that primarily affect digestion, meat allergies may cause symptoms involving the skin, respiratory system, and overall health.

Meat (pork, beef, chicken, lamb)

Japanese cedar (Cryptomeria) is known for producing highly allergenic pollen. This pollen can trigger a condition called "cedar fever," which causes intense allergic reactions. The pollen is typically released from winter through early spring and can be especially strong in areas where these trees are common, impacting many people.

Japanese Cedar

Guinea pig allergy is a reaction caused by proteins found in the animal’s dander, saliva, and urine. People with this allergy may develop symptoms after contact with guinea pigs or their living environments. These symptoms can occur immediately or develop gradually with repeated exposure.

Guinea Pig

Cultivated rye releases pollen, a well-known trigger of seasonal allergies. Its pollen season can overlap with the grass pollen season, worsening symptoms for people who are allergic to grass pollen. When rye fields are flowering, nearby communities may notice an increase in hay fever symptoms.

Cultivated Rye

Hazel trees are early bloomers that mark the start of allergy season for many people. Their catkins release large amounts of pollen as early as winter or spring, which can cause significant allergic reactions in individuals sensitive to tree pollen.

Hazel

Shrimp allergy is a common shellfish allergy caused by an immune reaction to proteins found in shrimp. It is one of the most common food allergies in adults and can cause symptoms ranging from mild to severe, including anaphylaxis. This allergy is typically lifelong and may be triggered by eating shrimp or even inhaling steam while cooking.

Shrimp

Perennial ryegrass (Lolium perenne) is a cool-season grass commonly used for lawns, pastures, and turf because of its fast growth and durability. It is part of the Poaceae family and is a well-known source of seasonal allergens. During its pollination period—usually late spring to early summer—it releases airborne pollen that can cause allergic reactions such as hay fever and asthma in sensitive individuals. The allergenic potential of perennial ryegrass makes it an important component in inhalant allergy testing panels.

Perennial Ryegrass

Lenscale refers to microscopic particles of shed skin, hair, or feathers from animals, mainly pets like cats and dogs. These particles can become airborne, settle on furniture, bedding, or carpets, and trigger allergic reactions in sensitive individuals. Unlike larger clumps of fur, lenscale is extremely light and often invisible to the naked eye, making it a persistent allergen indoors even in clean environments.

Allergic reactions to lenscale are caused by specific proteins found in the skin secretions or saliva of animals, which stick to these fine particles. Even without direct contact with animals, people can experience symptoms if they are exposed to contaminated environments.

Lenscale

Lamb's quarters (Chenopodium album) is a common wild plant found in many temperate regions around the world. While it is sometimes eaten as a leafy green in foraging and traditional cuisines, it is also known to produce airborne allergens. The plant releases fine, powdery pollen during the summer, which can become airborne and trigger allergic reactions such as hay fever, nasal congestion, and asthma symptoms in sensitive individuals. Due to its widespread presence and allergenic potential, lamb's quarters is frequently included in inhalant allergy testing panels.

Lamb's Quarters

Johnson grass (Sorghum halepense) is a fast-growing perennial grass native to the Mediterranean region but now widespread in many parts of the world, especially in warm and temperate climates. It is considered both an agricultural weed and a significant source of airborne allergens. Its pollen is released during the warm months and can trigger allergic reactions in susceptible individuals, particularly those with seasonal allergic rhinitis or asthma. Johnson grass belongs to the Poaceae (grass) family, which includes many cross-reactive species.

Johnson Grass

False ragweed (Parthenium hysterophorus), also known as parthenium weed, is an invasive plant species native to the Americas but now found in many parts of the world. It belongs to the Asteraceae family and is a significant allergen due to its highly potent airborne pollen. The plant typically blooms in late summer and fall, releasing pollen that can cause allergic rhinitis, asthma, and contact dermatitis in sensitive individuals. Inhalant allergy tests often include false ragweed because of its growing prevalence and strong allergenic properties.

False Ragweed

Cultivated oat grass (Avena sativa) is a common cereal crop grown extensively across temperate regions. Besides its agricultural uses, it is recognized as an airborne allergen. During its pollination period, oat grass releases pollen that can become airborne and inhaled, potentially causing allergic reactions in sensitive individuals. Symptoms may include sneezing, nasal congestion, itchy eyes, and respiratory irritation. It is one of many grasses whose pollen can contribute to seasonal allergic rhinitis, also known as hay fever.

Cultivated Oat Grass

Cucumber intolerance is a condition where the body struggles to digest cucumber, often causing gastrointestinal discomfort. Unlike a cucumber allergy, which triggers an immune response and may lead to more severe reactions, cucumber intolerance usually results in digestive symptoms after eating cucumber.

Cucumber

Citrus mix allergy refers to an allergic reaction to a combination of citrus fruits without specifying individual types. This category often includes oranges, lemons, limes, grapefruits, and may also involve tangerines, pomelos, and related varieties. The reaction is triggered by proteins common to these fruits, which can cause a range of allergy symptoms.

Citrus mix

Aspergillus fumigatus is a common mold found in soil, decaying organic material, and sometimes indoor environments. It is a significant allergen that can cause respiratory issues such as allergic bronchopulmonary aspergillosis (ABPA) in vulnerable individuals, particularly those with asthma or cystic fibrosis.

Aspergillus Fumigatus

Lobster and Pacific squid are seafood delicacies enjoyed by many but can cause allergic reactions in some individuals. These allergies may result in symptoms ranging from mild discomfort to severe, potentially life-threatening reactions. Recognizing and managing allergies to lobster and Pacific squid is important for those at risk.

Lobster/Pacific squid

White pine trees are conifers with long, slender needles and can contribute to pollen allergies. Although their pollen is less potent than that of some other trees, it may still cause symptoms in sensitive individuals, especially during peak pollen season in the spring.

White Pine

Oak trees produce abundant pollen and are a common cause of seasonal spring allergies. When they release pollen, sensitive individuals can experience significant allergic reactions. The oak pollen season is often linked to increased allergy and asthma symptoms due to higher pollen levels in the air.

Allergies to almonds, pine nuts, and sunflower seeds are immune system reactions caused by proteins found in these nuts and seeds. These reactions can result in various symptoms, and understanding, identifying, and managing these allergies is crucial for ensuring safety and overall health.

Almond, Pine Nut, Sunflower Seed

Vegetable widely used in culinary dishes. Tomato allergy can cause oral allergy syndrome and digestive issues.

Tomato

Pollen from hazelnut trees, known to cause respiratory allergies during its pollination period.

Hazelnut pollen

The role of Cross-reactive Carbohydrate Determinants (CCDs) involves the impact of complex sugar structures found on the surfaces of plant and animal proteins in allergy testing. These structures can cause cross-reactivity, resulting in false-positive outcomes. Understanding CCDs is crucial for accurate allergy diagnosis and preventing misinterpretation of test results.

CCD (Cross-reactive Carbohydrate Determinants)

Allergenic protein found in the skin, saliva, and urine of dogs, leading to respiratory issues and skin reactions.

Dog dander

Barley is a commonly used grain found in a variety of foods and drinks — from bread and cereals to beer. For some people, barley can trigger an allergic reaction because of its protein content. It’s important for those affected to recognize the symptoms and manage a barley allergy properly.

Barley

Goldenrod is a flowering plant often mistaken as the cause of hay fever, but the real culprit is usually ragweed, which blooms at the same time and produces highly allergenic pollen. Goldenrod’s pollen is heavy and sticky, making it less likely to become airborne. While allergic reactions to goldenrod can occur, they are uncommon and usually involve symptoms similar to hay fever.

Goldenrod

Total IgE testing measures the overall level of Immunoglobulin E (IgE) antibodies in the blood, which are produced in response to allergens. Elevated levels may indicate increased allergic sensitivity but do not identify specific allergens.

Total IgE

Hamster allergies are caused by allergens found in a hamster’s dander, saliva, and urine. These allergens can trigger reactions in people through direct contact with the animal or from exposure to airborne particles. Such allergic responses are common in households with hamsters or in pet care settings.

Hamster

Maple leaf sycamore is a tree species whose pollen is a common trigger for springtime allergies. Exposure can cause seasonal allergic rhinitis in sensitive individuals, with symptoms often worsening on warm, sunny, and windy days when pollen levels are highest.

Maple Leaf Sycamore

White ash (Fraxinus americana) pollen is a major contributor to seasonal pollen levels, especially in the spring when these trees bloom. The airborne pollen from white ash can cause allergic reactions in sensitive individuals, adding to the variety of tree pollens present during allergy season.

White Ash

Ox-eye daisy is a perennial plant that can cause allergic reactions in sensitive individuals. While its pollen is generally less allergenic than that of many other plants, it can still trigger hay fever symptoms in those who are predisposed.

Ox-eye Daisy

Silkworm pupa allergy is a condition caused by an immune reaction to proteins found in silkworm pupae, which are used in various dishes and as a source of silk. This allergy can trigger symptoms in some people, making it important to recognize the signs, avoid contact, and understand how to manage the allergy effectively.

Silkworm pupa

Garlic and onion, members of the Allium family, are commonly used ingredients in cuisines worldwide. However, for some people, these foods can cause allergic reactions because of their unique compounds. Understanding and managing garlic and onion allergies is essential for maintaining a healthy, symptom-free diet.

Garlic-Onion

Willow tree pollen is an indicator of the early spring release of pollen from willow trees. The light, easily spread pollen can cause allergic reactions in sensitive people, contributing to seasonal allergy symptoms. Exposure may cause discomfort, even during what is usually a pleasant time of year.

Willow

Buckwheat intolerance is a condition where the body struggles to digest buckwheat, causing digestive symptoms. Unlike a buckwheat allergy, which triggers an immune response and can lead to severe reactions, intolerance typically results in gastrointestinal discomfort only.

Buckwheat

Allergenic protein found in the skin, saliva, and urine of cats, which can cause respiratory issues and asthma.

Cat dander

Allergenic animal dander that can cause respiratory symptoms and skin reactions

Horse

Allergies to seafood such as plaice, anchovy, and Alaska pollock occur when the immune system reacts to specific proteins in these fish. These reactions can cause a range of symptoms and may significantly impact diet and lifestyle. Understanding the triggers, symptoms, and management strategies is important for those living with these allergies.

Plaice/Anchovy/Alaska Pollock

Pollen from olive trees, typically causing hay fever and other respiratory allergies during blooming periods.

Olive pollen

Pollen from rye grass, a significant cause of hay fever and respiratory allergies during its pollen season.

Rye pollen

Fish commonly consumed and used in various culinary dishes. Cod allergies can provoke digestive symptoms and anaphylaxis.

Grass pollen that is a significant cause of seasonal allergies, especially in late spring and early summer.

Bahia grass pollen

Tyrophagus putrescentiae, also known as the mold mite, is a species commonly found in stored foods and household dust. These mites thrive in environments with high humidity and can cause allergic reactions when their waste or body parts become airborne and are inhaled, leading to various allergy symptoms in sensitive individuals.

Tyrophagus Putrescentiae

Common pigweed is a widespread plant known for its highly allergenic pollen. Its pollen can trigger hay fever and other allergic reactions, especially in late summer and fall. People sensitive to pigweed may experience symptoms during its peak pollination season.

Common Pigweed

Apple allergy is an allergic reaction to proteins found in apples, often associated with Oral Allergy Syndrome (OAS). It typically affects individuals allergic to birch pollen, as similar proteins in apples can cause cross-reactivity. Symptoms range from mild oral irritation to more noticeable reactions, although severe cases are rare.

Apple

Pollen from cypress trees, prevalent in the spring and fall. Known to cause hay fever and asthma symptoms.

Cypress pollen

Stone fruit that can cause allergies ranging from oral allergy syndrome to severe reactions like anaphylaxis.

Peach

Grass pollen allergies indicate sensitivity to various types of grass—including sweet vernal, orchard grass, common reed, and bent grass. These allergens can significantly impact individuals who are prone to allergic reactions, affecting respiratory health, causing eye irritation, and reducing overall well-being. Understanding these allergies, recognizing the symptoms, and using effective management strategies can help lessen discomfort and enhance quality of life during peak pollen seasons.

Sweet Vernal

Acarus siro, commonly known as the flour mite, is a species frequently found in stored grains and flour. These mites can thrive in kitchen cupboards and pantries, especially in humid environments. For sensitive individuals, exposure may cause allergic reactions and can be particularly problematic for those with preexisting respiratory issues.

Acarus siro

Fruit allergies, such as those to kiwi, mango, and banana, are increasingly recognized and result from the body's immune response to specific proteins in these fruits. These allergies can cause a variety of symptoms, ranging from mild discomfort to severe reactions, making it essential to identify and manage them effectively to maintain health and well-being.

Kiwi, Mango, Banana

Tuna and salmon are popular fish choices worldwide, known for their flavor and nutritional benefits. However, some people may have allergic reactions to these fish — a condition that can range from mild discomfort to severe, life-threatening reactions. Understanding the symptoms, triggers, and management strategies for tuna and salmon allergies is essential for those affected.

Tuna Salmon

Dermatophagoides pteronyssinus (D. pteronyssinus), commonly known as the European house dust mite, is a common indoor allergen. These microscopic organisms thrive in warm, humid environments and feed on organic matter such as shed human skin flakes. Their body fragments and waste products can trigger allergic reactions and asthma in sensitive individuals.

Dermatophagoides pteronyssinus (D. pteronyssinus)

Shellfish allergies are a type of food allergy that affect both adults and children. This allergy often includes a variety of shellfish such as blue mussel, oyster, clam, and scallop. Because allergic reactions can be severe, it is important for those affected to understand how to recognize and manage a shellfish allergy.

Blue Mussel, Oyster, Clam, Scallop

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Almond

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