What does a shrimp allergy look like
The following description refers mainly to the external anatomy of the common European shrimp, Crangon crangon, as a typical example of a decapod shrimp. The body of the shrimp is divided into two main parts: the head and thorax which are fused together to form the cephalothorax, and a endless narrow abdomen. The shell which protects the cephalothorax is harder and thicker than the shell elsewhere on the shrimp and is called the carapace. The carapace typically surrounds the gills, through which water is pumped by the action of the mouthparts. The rostrum, eyes, whiskers and legs also issue from the carapace.
The rostrum, from the Latin rōstrum meaning beak, looks love a beak or pointed nose at the front of the shrimp’s head. It is a rigid forward extension of the carapace and can be used for attack or defense. It may also stabilize the shrimp when it swims backward. Two bulbous eyes on stalks sit either side of the rostrum. These are compound eyes which own panoramic vision and are extremely excellent at detecting movement. Two pairs of whiskers (antennae) also issue from the head.
One of these pairs is extremely endless and can be twice the length of the shrimp, while the other pair is fairly short. The antennae own sensors on them which permit the shrimp to feel where they touch, and also permit them to «smell» or «taste» things by sampling the chemicals in the water. The endless antennae assist the shrimp orient itself with regard to its immediate surroundings, while the short antennae assist assess the suitability of prey.
Eight pairs of appendages issue from the cephalothorax.
The first three pairs, the maxillipeds, Latin for «jaw feet», are used as mouthparts. In Crangon crangon, the first pair, the maxillula, pumps water into the gill cavity. After the maxilliped come five more pairs of appendages, the pereiopods. These form the ten decapod legs. In Crangon crangon, the first two pairs of pereiopods own claws or chela. The chela can grasp food items and bring them to the mouth. They can also be used for fighting and grooming. The remaining four legs are endless and slender, and are used for walking or perching.
The muscular abdomen has six segments and has a thinner shell than the carapace.
Each segment has a separate overlapping shell, which can be transparent. The first five segments each own a pair of appendages on the underside, which are shaped love paddles and are used for swimming forward. The appendages are called pleopods or swimmerets, and can be used for purposes other than swimming. Some shrimp species use them for brooding eggs, others own gills on them for breathing, and the males in some species use the first pair or two for insemination. The sixth segment terminates in the telson flanked by two pairs of appendages called the uropods. The uropods permit the shrimp to swim backward, and function love rudders, steering the shrimp when it swims forward. Together, the telson and uropods form a splayed tail fan.
If a shrimp is alarmed, it can flex its tail fan in a rapid movement. This results in a backward dart called the caridoid escape reaction (lobstering).
There are numerous variations in the ways diverse types of shrimp glance and act. Even within the core group of caridean shrimp, the little delicate Pederson’s shrimp (above) looks and behaves fairly unlike the large commercial pink shrimp or the snapping pistol shrimp. The caridean family of pistol shrimp are characterized by large asymmetrical claws, the larger of which can produce a noisy snapping sound.
The family is diverse and worldwide in distribution, consisting of about 600 species. Colonies of snapping shrimp are a major source of noise in the ocean and can interfere with sonar and underwater communication. The little emperor shrimp has a symbiotic relationship with sea slugs and sea cucumbers, and may assist hold them clear of ectoparasites.
Most shrimp are omnivorous, but some are specialised for specific modes of feeding.
Some are filter feeders, using their setose (bristly) legs as a sieve; some scrape algae from rocks. Cleaner shrimp feed on the parasites and necrotic tissue of the reef fish they groom. Some species of shrimp are known to cannibalize others as well if other food sources are not readily available. In turn, shrimp are eaten by various animals, particularly fish and seabirds, and frequently host bopyrid parasites.
Females of the freshwater shrimp Caridina ensifera are capable of storing sperm from multiple partners, and thus can produce progeny with diverse paternities. Reproductive success of sires was found to correlate inversely with their genetic relatedness to the mother. This finding suggests that sperm competition and/or pre- and post-copulatory female choice occurs.
Female choice may increase the fitness of progeny by reducing inbreeding depression that ordinarily results from the expression of homozygous deleterious recessive mutations.
Shrimp and prawn
From Raymond Bauer in Remarkable Shrimps:
- Shrimp is characteristically used to refer to those crustaceans with endless antennae, slender legs, and a laterally compressed, muscular abdomen that is highly adapted for both forward swimming and a backward (retrograde) escape response.
- Prawn is often used as a synonym of shrimp for penaeoidean and caridean shrimp, especially those of large size.
From the English Oxford Dictionaries:
- Shrimp: a little free-swimming crustacean with an elongated body, typically marine and frequently of commercial importance as food.
- Prawn: a marine crustacean which resembles a large shrimp.
Shrimp are swimming crustaceans with endless narrow muscular abdomens and endless antennae.
Unlike crabs and lobsters, shrimp own well developed pleopods (swimmerets) and slender walking legs; they are more adapted for swimming than walking. Historically, it was the distinction between walking and swimming that formed the primary taxonomic division into the previous suborders Natantia and Reptantia. Members of the Natantia (shrimp in the broader sense) were adapted for swimming while the Reptantia (crabs, lobsters, etc.) were adapted for crawling or walking. Some other groups also own common names that include the expression «shrimp»; any little swimming crustacean resembling a shrimp tends to be called one.
|Differences between shrimp, lobsters and crabs|
|Shrimp are slender with endless muscular abdomens.
They glance somewhat love little lobsters, but not love crabs. The abdomens of crabs are little and short, whereas the abdomens of lobsters and shrimp are large and endless. The lower abdomens of shrimp support pleopods which are well-adapted for swimming. The carapaces of crabs are wide and flat, whereas the carapaces of lobsters and shrimp are more cylindrical. The antennae of crabs are short, whereas the antennae of lobsters and shrimp are generally endless, reaching more than twice the body length in some shrimp species.
|Clawed lobsters(pictured left) and spiny lobsters(pictured right) are an intermediate evolutionary development between shrimp and crabs.
They glance somewhat love large versions of shrimp. Clawed lobsters own large claws while spiny lobsters do not, having instead spiny antennae and carapace. Some of the biggest decapods are lobsters. Love crabs, lobsters own robust legs and are highly adapted for walking on the seafloor, though they do not stroll sideways. Some species own rudimentary pleopods, which give them some ability to swim, and love shrimp they can lobster with their tail to escape predators, but their primary mode of locomotion is walking, not swimming.
|Crabs evolved from early shrimp, though they do not glance love shrimp.
Unlike shrimp, their abdomens are little, and they own short antennae and short carapaces that are wide and flat. They own prominent grasping claws as their front pair of limbs. Crabs are adapted for walking on the seafloor. They own robust legs and generally move about the seafloor by walking sideways. They own pleopods, but they use them as intromittent organs or to hold egg broods, not for swimming. Whereas shrimp and lobsters escape predators by lobstering, crabs cling to the seafloor and burrow into sediment.
Compared to shrimp and lobsters, the carapaces of crabs are particularly heavy, hard and mineralized.
In 1991, archeologists suggested that ancient raised paved areas near the coast in Chiapas, Mexico, were platforms used for drying shrimp in the sun, and that adjacent clay hearths were used to dry the shrimp when there was no sun. The evidence was circumstantial, because the chitinous shells of shrimp are so thin they degrade rapidly, leaving no fossil remains.
In 1985 Quitmyer and others found direct evidence dating back to 600 AD for shrimping off the southeastern coast of North America, by successfully identifying shrimp from the archaeological remains of their mandibles (jaws). Clay vessels with shrimp decorations own been found in the ruins of Pompeii. In the 3rd century AD, the Greek author Athenaeus wrote in his literary work, Deipnosophistae; «… of every fish the daintiest is a young shrimp in fig leaves.»
In North America, indigenous peoples of the Americas captured shrimp and other crustaceans in fishing weirs and traps made from branches and Spanish moss, or used nets woven with fibre beaten from plants.
At the same time early European settlers, oblivious to the «protein-rich coasts» every about them, starved from lack of protein. In 1735 beach seines were imported from France, and Cajun fishermen in Louisiana started catching white shrimp and drying them in the sun, as they still do today. In the mid nineteenth century, Chinese immigrants arrived for the California Gold Rush, numerous from the Pearl River Delta where netting little shrimp had been a tradition for centuries.
Some immigrants starting catching shrimp local to San Francisco Bay, particularly the little inch endless Crangon franciscorum. These shrimp burrow into the sand to hide, and can be present in high numbers without appearing to be so. The catch was dried in the sun and was exported to China or sold to the Chinese community in the United States. This was the beginning of the American shrimping industry. Overfishing and pollution from gold mine tailings resulted in the decline of the fishery. It was replaced by a penaeid white shrimp fishery on the South Atlantic and Gulf coasts. These shrimp were so abundant that beaches were piled with windrows from their moults.
Modern industrial shrimping methods originated in this area.
«»For shrimp to develop into one of the world’s most favorite foods, it took the simultaneous development of the otter trawl… and the internal combustion engine.» Shrimp trawling can capture shrimp in huge volumes by dragging a net along the seafloor. Trawling was first recorded in England in 1376, when King Edward III received a request that he ban this new and destructive way of fishing. In 1583, the Dutch banned shrimp trawling in estuaries.
In the 1920s, diesel engine were adapted for use in shrimp boats.
Power winches were connected to the engines, and only little crews were needed to rapidly lift heavy nets on board and empty them. Shrimp boats became larger, faster, and more capable. New fishing grounds could be explored, trawls could be deployed in deeper offshore waters, and shrimp could be tracked and caught circular the year, instead of seasonally as in earlier times. Larger boats trawled offshore and smaller boats worked bays and estuaries. By the 1960s, steel and fibreglass hulls further strengthened shrimp boats, so they could trawl heavier nets, and steady advances in electronics, radar, sonar, and GPS resulted in more sophisticated and capable shrimp fleets.
As shrimp fishing methods industrialised, parallel changes were happening in the way shrimp were processed.
«In the 19th century, sun dried shrimp were largely replaced by canneries. In the 20th century, the canneries were replaced with freezers.»
In the 1970s, significant shrimp farming was initiated, particularly in China. The farming accelerated during the 1980s as the quantity of shrimp demand exceeded the quantity supplied, and as excessive bycatch and threats to endangered sea turtle became associated with trawling for wild shrimp. In 2007, the production of farmed shrimp exceeded the capture of wild shrimp.
Although there are thousands of species of shrimp worldwide, only about 20 of these species are commercially significant.
The following table contains the principal commercial shrimp, the seven most harvested species. Every of them are decapods; most of them belong to the Dendrobranchiata and four of them are penaeid shrimp.
|Principal commercial shrimp species|
|Group||Common name||Scientific name||Description||Max length (mm)||Depth (m)||Habitat||FAO||WoRMS||2010 production (thousand tonnes)|
|Dendrobranchiata||Whiteleg shrimp||Litopenaeus vannamei(Boone, 1931)||The most extensively farmed species of shrimp.||230||0–72||marine, estuarine||||||1||2721||2722|
|Giant tiger prawn||Penaeus monodonFabricius, 1798||336||0–110||marine, estuarine||||||210||782||992|
|Akiami paste shrimp||Acetes japonicusKishinouye, 1905||Most intensively fished species. They are little with black eyes and red spots on the uropods. Only a little quantity is sold unused, most is dried, salted or fermented.||30||shallow||marine||||||574||574|
|Southern rough shrimp||Trachysalambria curvirostris(Stimpson, 1860)||Easier to catch at night, and fished only in waters less than 60 m (200 ft) deep. Most of the harvest is landed in China.||98||13–150||marine||||||294||294|
|Fleshy prawn||Fenneropenaeus chinensis(Osbeck, 1765)||Trawled in Asia where it is sold frozen.
Exported to Western Europe. Cultured by Japan and South Korea in ponds.
|Banana prawn||Fenneropenaeus merguiensis(De Man, 1888)||Typically trawled in the wild and frozen, with most catches made by Indonesia. Commercially significant in Australia, Pakistan and the Persian Gulf. Cultured in Indonesia and Thailand. In India it tends to be confused with Fenneropenaeus indicus, so its economic status is unclear.||240||10–45||marine, estuarine||||||93||20||113|
|Caridea||Northern prawn||Pandalus borealis(Krøyer, 1838)||Widely fished since the early 1900s in Norway, and later in other countries following Johan Hjort’s practical discoveries of how to locate them.
They own a short life which contributes to a variable stock on a annually basis. They are not considered overfished.
Lai CK, Beasley R, Crane J, Foliaki S, Shah J, Weiland S, et al.
Global variation in the prevalence and severity of asthma symptoms: phase three of the International Study of Asthma and Allergies in Childhood (ISAAC). Thorax. 2009;64(6):476–83.CrossRef Scholar
Dahlman-Hoglund A, Renstrom A, Larsson PH, Elsayed S, Andersson E. Salmon allergen exposure, occupational asthma, and respiratory symptoms among salmon processing workers. Am J Ind Med. 2012;55(7):624–30.CrossRef Scholar
Rona RJ, Keil T, Summers C, Gislason D, Zuidmeer L, Sodergren E, et al.
The prevalence of food allergy: a meta-analysis. J Allergy Clin Immunol. 2007;120(3):638–46.CrossRef Scholar
Savage J, Johns CB. Food allergy: epidemiology and natural history. Immunol Allergy Clin N Am.
Venter C, Arshad SH. Epidemiology of food allergy. Pediatr Clin N Am. 2011;58(2):327–49.CrossRef Scholar
Liu AH, Jaramillo R, Sicherer SH, Wood RA, Bock SA, Burks AW, et al. National prevalence and risk factors for food allergy and relationship to asthma: results from the National Health and Nutrition Examination Survey 2005–-2006. J Allergy Clin Immunol. 2010;126(4):798–806.CrossRef Scholar
Arabkhazaeli A, Vijverberg SJ, van Erp FC, Raaijmakers JA, van der Ent CK, van der Maitland Zee AH.
Characteristics and severity of asthma in children with and without atopic conditions: a cross-sectional study. BMC Pediatr. 2015;15:172.CrossRef Scholar
Illi S, von Mutius E, Lau S, Nickel R, Niggemann B, Sommerfeld C, et al. The pattern of atopic sensitization is associated with the development of asthma in childhood. J Allergy Clin Immunol. 2001;108(5):709–14.CrossRef Scholar
Wang J, Visness CM, Sampson HA. Food allergen sensitization in inner-city children with asthma.
J Allergy Clin Immunol. 2005;115(5):1076–80.CrossRef Scholar
Schroeder A, Kumar R, Pongracic JA, Sullivan CL, Caruso DM, Costello J, et al. Food allergy is associated with an increased risk of asthma. Clin Exp Allergy. 2009;39(2):261–70.CrossRef Scholar
Hill DA, Grundmeier RW, Ram G, Spergel JM. The epidemiologic characteristics of healthcare provider-diagnosed eczema, asthma, allergic rhinitis, and food allergy in children: a retrospective cohort study.
BMC Pediatr. 2016;16:133.CrossRef Scholar
Roberts G, Lack G. Relevance of inhalational exposure to food allergens. Curr Opin Allergy Clin Immunol.
Tariq SM, Matthews SM, Hakim EA, Arshad SH. Egg allergy in infancy predicts respiratory allergic disease by 4 years of age. Pediatr Allergy Immunol. 2000;11(3):162–7.CrossRef Scholar
Spergel JM, Paller AS. Atopic dermatitis and the atopic march. J Allergy Clin Immunol. 2003;112(6 Suppl):S118–27.CrossRef Scholar
Rhodes HL, Sporik R, Thomas P, Holgate ST, Cogswell JJ. Early life risk factors for adult asthma: a birth cohort study of subjects at risk.
J Allergy Clin Immunol. 2001;108(5):720–5.CrossRef Scholar
Meyer R, Fleming C, Dominguez-Ortega G, Lindley K, Michaelis L, Thapar N, et al. Manifestations of food protein induced gastrointestinal allergies presenting to a single tertiary paediatric gastroenterology unit. World Allergy Organ J. 2013;6(1):13.CrossRef Scholar
•• Tsakok T, Marrs T, Mohsin M, Baron S, du Toit G, Till S, et al. Does atopic dermatitis cause food allergy? A systematic review. J Allergy Clin Immunol. 2016;137(4):1071–8.
This paper comprises a systematic analysis and review out of 66 research studies. It was concluded that there is a strong association between atopic dermatitis, food sensitization and food allergy.CrossRef Scholar
Flohr C, Perkin M, Logan K, Marrs T, Radulovic S, Campbell LE, et al. Atopic dermatitis and disease severity are the main risk factors for food sensitization in exclusively breastfed infants. J Invest Dermatol. 2014;134(2):345–50.CrossRef Scholar
Guillet G, Guillet MH.
Natural history of sensitizations in atopic dermatitis. A 3-year follow-up in 250 children: food allergy and high risk of respiratory symptoms. Arch Dermatol. 1992;128(2):187–92.CrossRef Scholar
Lack G. Epidemiologic risks for food allergy. J Allergy Clin Immunol. 2008;121(6):1331–6.CrossRef Scholar
Abo-Zaid G, Sharpe RA, Fleming LE, Depledge M, Osborne NJ. Association of baby eczema with childhood and adult asthma: analysis of data from the 1958 birth cohort study. Int J Environ Res Public Health. 2018;15(7).CrossRef Scholar
Bergmann RL, Edenharter G, Bergmann KE, Forster J, Bauer CP, Wahn V, et al. Atopic dermatitis in early infancy predicts allergic airway disease at 5 years.
Clin Exp Allergy. 1998;28(8):965–70.CrossRef Scholar
Bao Y, Chen Z, Liu E, Xiang L, Zhao D, Hong J. Risk factors in preschool children for predicting asthma during the preschool age and the early school age: a systematic review and meta-analysis. Curr Allergy Asthma Rep. 2017;17(12):85.CrossRef Scholar
Hourihane JO, Dean TP, Warner JO. Peanut allergy in relation to heredity, maternal diet, and other atopic diseases: results of a questionnaire survey, skin prick testing, and food challenges. BMJ. 1996;313(7056):518–21.CrossRef Scholar
Sicherer SH, Furlong TJ, Maes HH, Desnick RJ, Sampson HA, Gelb BD.
Genetics of peanut allergy: a twin study. J Allergy Clin Immunol. 2000;106(1 Pt 1):53–6.CrossRef Scholar
Irvine AD, McLean WH, Leung DY. Filaggrin mutations associated with skin and allergic diseases. N Engl J Med. 2011;365(14):1315–27.CrossRef Scholar
Ziyab AH, Karmaus W, Zhang H, Holloway JW, Steck SE, Ewart S, et al. Allergic sensitization and filaggrin variants predispose to the comorbidity of eczema, asthma, and rhinitis: results from the Isle of Wight birth cohort.
Clin Exp Allergy. 2014;44(9):1170–8.CrossRef Scholar
Marks GB, Mihrshahi S, Kemp AS, Tovey ER, Webb K, Almqvist C, et al. Prevention of asthma during the first 5 years of life: a randomized controlled trial. J Allergy Clin Immunol. 2006;118(1):53–61.CrossRef Scholar
Woods RK, Thien F, Raven J, Walters EH, Abramson M. Prevalence of food allergies in young adults and their relationship to asthma, nasal allergies, and eczema.
Ann Allergy Asthma Immunol. 2002;88(2):183–9.CrossRef Scholar
Best KP, Sullivan TR, Palmer DJ, Gold M, Martin J, Kennedy D, et al. Prenatal omega-3 LCPUFA and symptoms of allergic disease and sensitization throughout early childhood — a longitudinal analysis of long-term follow-up of a randomized controlled trial. World Allergy Organ J. 2018;11(1):10.CrossRef Scholar
Yepes-Nunez JJ, Brozek JL, Fiocchi A, Pawankar R, Cuello-Garcia C, Zhang Y, et al. Vitamin D supplementation in primary allergy prevention: Systematic systematic review of randomized and non-randomized studies.
Allergy. 2018;73(1):37–49.CrossRef Scholar
Kramer MS, Matush L, Vanilovich I, Platt R, Bogdanovich N, Sevkovskaya Z, et al. Effect of prolonged and exclusive breast feeding on risk of allergy and asthma: cluster randomised trial. BMJ. 2007;335(7624):815.CrossRef Scholar
Koplin JJ, Osborne NJ, Wake M, Martin PE, Gurrin LC, Robinson MN, et al. Can early introduction of egg prevent egg allergy in infants?
A population-based study. J Allergy Clin Immunol. 2010;126(4):807–13.CrossRef Scholar
•• Perkin MR, Logan K, Tseng A, Raji B, Ayis S, Peacock J, et al. Randomized trial of introduction of allergenic foods in breast-fed infants. N Engl J Med. 2016;374(18):1733–43. This is a RCT in young children in which they show that early introduction of peanut and egg at the age of 3 months results in a reduction of peanut and egg allergy at a later age.CrossRef Scholar
Calvani M, Cardinale F, Martelli A, Muraro A, Pucci N, Savino F, et al. Risk factors for severe pediatric food anaphylaxis in Italy. Pediatr Allergy Immunol. 2011;22(8):813–9.CrossRef Scholar
Summers CW, Pumphrey RS, Woods CN, McDowell G, Pemberton PW, Arkwright PD.
Factors predicting anaphylaxis to peanuts and tree nuts in patients referred to a specialist middle. J Allergy Clin Immunol. 2008;121(3):632–8.CrossRef Scholar
Pumphrey RS, Roberts IS. Postmortem findings after fatal anaphylactic reactions. J Clin Pathol. 2000;53(4):273–6.CrossRef Scholar
van Erp FC, Knulst AC, Kentie PA, Pasmans SG, van der Ent CK, Meijer Y. Can we predict severe reactions during peanut challenges in children? Pediatr Allergy Immunol. 2013;24(6):596–602.CrossRef Scholar
•• Pettersson ME, Koppelman GH, Flokstra-de Blok BMJ, Kollen BJ, Dubois AEJ.
Prediction of the severity of allergic reactions to foods. Allergy. 2018;73(7):1532–40. This study underwrites that the severity of double blind placebo controlled food challenges remains largely unpredictable.CrossRef Scholar
Hill DJ, Firer MA, Shelton MJ, Hosking CS. Manifestations of milk allergy in infancy: clinical and immunologic findings. J Pediatr. 1986;109(2):270–6.CrossRef Scholar
Bock SA, Munoz-Furlong A, Sampson HA. Fatalities due to anaphylactic reactions to foods.
J Allergy Clin Immunol. 2001;107(1):191–3.CrossRef Scholar
James JM, Eigenmann PA, Eggleston PA, Sampson HA. Airway reactivity changes in asthmatic patients undergoing blinded food challenges. Am J Respir Crit Care Med. 1996;153(2):597–603.CrossRef Scholar
• Krogulska A, Dynowski J, Jedrzejczyk M, Sardecka I, Malachowska B, Wasowska-Krolikowska K. The impact of food allergens on airway responsiveness in schoolchildren with asthma: A a DBPCFC study. Pediatr Pulmonol. 2016;51(8):787–95. This study shows that food allergens may enhance non-specific bronchial hyperresponsiveness.CrossRef Scholar
Ortolani C, Ispano M, Pastorello E, Bigi A, Ansaloni R.
The oral allergy syndrome. Ann Allergy. 1988;61(6 Pt 2):47–52.PubMed Scholar
Tuft L, Blumstein G. Studies in food allergy — sensitization to unused fruits: clinical and experimental observations. J Allergy Ther. 1942;13:574–8.CrossRef Scholar
Webber CM, England RW. Oral allergy syndrome: a clinical, diagnostic, and therapeutic challenge. Ann Allergy Asthma Immunol. 2010;104(2):101–8; quiz 9–10, 17.CrossRef Scholar
Amlot PL, Kemeny DM, Zachary C, Parkes P, Lessof MH. Oral allergy syndrome (OAS): symptoms of IgE-mediated hypersensitivity to foods. Clin Allergy. 1987;17(1):33–42.CrossRef Scholar
van Ree R, Antonicelli L, Akkerdaas JH, Pajno GB, Barberio G, Corbetta L, et al.
Asthma after consumption of snails in house-dust-mite-allergic patients: a case of IgE cross-reactivity. Allergy. 1996;51(6):387–93.CrossRef Scholar
Farioli L, Losappio LM, Giuffrida MG, Pravettoni V, Micarelli G, Nichelatti M, et al. Mite-induced asthma and IgE levels to shrimp, mite, tropomyosin, arginine kinase, and Der p 10 are the most risk factors for challenge-provenshrimp allergy. Int Arch Allergy Immunol. 2017;174(3–4):133–43.CrossRef Scholar
Roberts G, Golder N, Lack G.
Bronchial challenges with aerosolized food in asthmatic, food-allergic children. Allergy. 2002;57(8):713–7.CrossRef Scholar
Comstock SS, DeMera R, Vega LC, Boren EJ, Deane S, Haapanen LA, et al. Allergic reactions to peanuts, tree nuts, and seeds aboard commercial airliners. Ann Allergy Asthma Immunol. 2008;101(1):51–6.CrossRef Scholar
•• Baur X. A compendium of causative agents of occupational asthma. J Occup Med Toxicol. 2013;8(1):15. A comprehensive overview of agents that may induce occupational asthma.CrossRef Scholar
Salvatori N, Reccardini F, Convento M, Purinan A, Colle R, De Carli S, et al.
Asthma induced by inhalation of flour in adults with food allergy to wheat. Clin Exp Allergy. 2008;38(8):1349–56.CrossRef Scholar
Campbell CP, Yates DH. Lupin allergy: a hidden killer at home, a menace at work; occupational disease due to lupin allergy. Clin Exp Allergy. 2010;40(10):1467–72.CrossRef Scholar
Leser C, Hartmann AL, Praml G, Wuthrich B. The «“egg-egg»” syndrome: occupational respiratory allergy to airborne egg proteins with consecutive ingestive egg allergy in the bakery and confectionery industry. J Investig Allergol Clin Immunol.
Q: I own shellfish allergy, which I found out in college. I began noticing reactions to shrimp, lobster, mussels and clams. These allergies were confirmed with allergy testing. What I’m not clear on: would it be safe for me to eat calamari? I did used to eat it before my other reactions over the past three years.
Dr. Sharma: Since seafood allergy is the most common food allergy in adults, there are undoubtedly numerous others who share your question.
For those allergic to shellfish, it’s significant first to understand the categories of shellfish.
These include crustaceans (crab, shrimp, lobster, prawns and crawfish) and mollusks (squid or calamari, snails, and bivalves such as mussels, clams, oysters and scallops).
Several types of shellfish may own similarities in their chemical structure due to a shared protein called tropomysin. This makes it possible for the immune system to “see” these diverse kinds of shellfish as similar.
Reacting to More Than 1 Kind
Based on a few limited studies, about 40 percent of people with allergy to crustaceans may react to other crustaceans. Meantime, 50 percent of those allergic to mollusks report reactions to more than one mollusk.
A smaller population, between 10 to 15 percent, are allergic to both crustaceans and mollusks.
Given this information, numerous allergists will recommend avoidance of every shellfish if someone has had a life-threatening reaction to any helpful of shellfish.
Tolerating Calamari, or Not
For those who own had non-life-threatening reactions to a specific shellfish, an allergist might act out testing, such as skin and blood testing, to the other shellfish.
Based on the results of such tests, the allergist is capable to decide whether to pursue an oral food challenge to assess whether other shellfish may be tolerated.
In your case, you own reacted to both crustaceans and mollusks, suggesting a high likelihood that you might also react to calamari, a mollusk. But be certain to discuss with your allergist whether testing to squid is indicated based on your specific history.
Lastly, even if you are not allergic to some types of shellfish, you will need to be careful to avoid cross-contact with your allergens in restaurants and fish markets.
Sharma is an allergist, clinical researcher and associate professor of pediatrics. He is Chief of the Division of Allergy and Immunology at Children’s National Medical Middle in Washington D.C. and Director of the Food Allergy Program. He co-authors “The Food Allergy Experts” column in Allergic Living e-magazine. Questions submitted will be considered for answer in the magazine.
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What is a Food Allergy? There Are Diverse Types of Allergic Reactions to Foods
Shrimp are widespread, and can be found near the seafloor of most coasts and estuaries, as well as in rivers and lakes. There are numerous species, and generally there is a species adapted to any specific habitat. Most shrimp species are marine, although about a quarter of the described species are found in unused water. Marine species are found at depths of up to 5,000 metres (16,000 ft), and from the tropics to the polar regions.
Although shrimp are almost entirely fully aquatic, the two species of Merguia are semi-terrestrial and spend a significant part of their life on land in mangrove.
There is little agreement among taxonomists concerning the phylogeny of crustaceans. Within the decapods «every study gives totally diverse results. Nor do even one of these studies match any of the rival morphology studies». Some taxonomists identify shrimp with the infraorder Caridea and prawns with the suborder Dendrobranchiata. While diverse experts give diverse answers, there is no disagreement that the caridean species are shrimp. There are over 3000 caridean species. Occasionally they are referred to as «true shrimp».
Traditionally decapods were divided into two suborders: the Natantia (or swimmers), and the Reptantia (or walkers).
The Natantia or swimmers included the shrimp. They were defined by their abdomen which, together with its appendages was well adapted for swimming. The Reptantia or walkers included the crabs and lobsters. These species own little abdominal appendages, but robust legs well adapted for walking. The Natantia was thought to be paraphyletic, that is, it was thought that originally every decapods were love shrimp.
However, classifications are now based on clades, and the paraphyletic suborder Natantia has been discontinued. «On this basis, taxonomic classifications now divide the order Decapoda into the two suborders: Dendrobranchiata for the largest shrimp clade, and Pleocyemata for every other decapods.
The Pleocyemata are in turn divided into half a dozen infra-orders»
- The taxonomists De Grave and Fransen, 2011, recognise four major groups of shrimp: the suborder Dendrobranchiata and the infraorders Procarididea, Stenopodidea and Caridea». This group is identical to the traditional Natantia group, and contains decapods only.
- All shrimp of commercial interest belong to the Natantia.
The FAO determine the categories and terminology used in the reporting of global fisheries. They define a shrimp as a «decapod crustacean of the suborder Natantia».
- According to the Codex Alimentarius Commission of the FAO and WHO: «The term shrimp (which includes the frequently used term prawn) refers to the species covered by the most recent edition of the FAO listing of shrimp, FAO Species Catalogue, Volume 1, Shrimps and prawns of the world, an annotated catalogue of species of interest to fisheries FAO Fisheries Synopsis No.
125.» In turn, the Species Catalogue says the highest category it deals with is «the suborder Natantia of the order Crustacea Decapoda to which every shrimps and prawns belong».
|Major shrimp groups of the Natantia|
|Order||Suborder||Infraorder||Image||Extant species ||Description|
A particularly significant family in this suborder is the Penaeidae, often referred to as penaeid shrimp or penaeid prawn.
Most commercially significant species are in this family. See below.
The species in this suborder tend to be larger than the caridean shrimp species under, and numerous are commercially significant. They are sometimes referred to as prawns. Dendrobranchiata, such as the giant tiger prawn pictured, typically own three pairs of claws, though their claws are less conspicuous than those of other shrimp. They do not brood eggs love the caridean, but shed them directly into the water.
Their gills are branching, whereas the gills of caridean shrimp are lamellar. The segments on their abdomens are even-sized, and there is no pronounced bend in the abdomen.
|Pleocyemata||Caridea||3438||The numerous species in this infraorder are known as caridean shrimp, though only a few are commercially significant. They are generally little, nocturnal, hard to discover (they burrow in the sediment), and of interest mainly to marine biologists. Caridean shrimp, such as the pink shrimp pictured, typically own two pairs of claws.
Female carideans attach eggs to their pleopods and brood them there. The second abdominal segment overlaps both the first and the third segment, and the abdomen shows a pronounced caridean bend.
|Procarididea||6||A minor sister group to the Caridea (immediately above)|
|Stenopodidea||71||Known as boxer shrimp, the members of this infraorder are often cleaner shrimp. Their third pair of walking legs (pereiopods) are greatly enlarged.
The banded coral shrimp(pictured) is favorite in aquariums. The Stenopodidea are a much smaller group than the Dendrobranchia and Caridea, and own no commercial importance.
Other decapod crustaceans also called shrimp, are the ghost or mud shrimp belonging to the infra-order Thalassinidea. In Australia they are called yabbies. The monophyly of the group is not certain; recent studies own suggested dividing the group into two infraorders, Gebiidea and Axiidea.
A shrimp seems to be almost any crustacean that isn’t a lobster, barnacle, or crab
– Greg Jensen 
A wide variety of non-decapod crustaceans are also commonly referred to as shrimp.
This includes the brine shrimp, clam shrimp, fairy shrimp and tadpole shrimp belonging to the branchiopods, the lophogastridan shrimp, opossum shrimp and skeleton shrimp belonging the Malacostraca; and seed shrimp which are ostracods. Numerous of these species glance fairly unlike the commercial decapod shrimp that are eaten as seafood. For example, skeleton shrimp own short legs and a slender tail love a scorpion tail, fairy shrimp swim upside below with swimming appendages that glance love leaves, and the tiny seed shrimp own bivalved carapaces which they can open or close.Krill resemble miniature shrimp, and are sometimes called «krill shrimp».
|Other species groups commonly known as shrimp|
|Branchiopoda||Branchiopoda comes from the Greek branchia meaning gills, and pous meaning feet. They own gills on their feet or mouthparts.|
|brine shrimp||8||Brine shrimp belong to the genus Artemia.
They live in inland saltwater lakes in unusually high salinities, which protects them from most predators. They produce eggs, called cysts, which can be stored in a dormant state for endless periods and then hatched on demand. This has led to the extensive use of brine shrimp as fish feed in aquaculture. Brine shrimp are sold as novelty gifts under the marketing name Sea-Monkeys.
|clam shrimp||150||Clam shrimp belong to the group Conchostraca. These freshwater shrimp own a hinged bivalved carapace which can open and shut.|
|fairy shrimp||300||Fairy shrimp belong to the class Anostraca.
These 1–10 cm endless freshwater or brackish shrimp own no carapace. They swim upside below with their stomach uppermost, with swimming appendages that glance love leaves. Most fairy shrimp are herbivores, and eat only the algae in the plankton. Their eggs can survive drought and temperature extremes for years, reviving and hatching after the rain returns.
|tadpole shrimp||20||Tadpole shrimp belong to the family Notostraca. These living fossils own not much changed since the Triassic.
They are drought-resistant and can be found preying on fairy shrimp and little fish at the bottom of shallow lakes and temporary pools. The longtail tadpole shrimp(pictured) has three eyes and up to 120 legs with gills on them. It lives for 20–90 days. Diverse populations can be bisexual, unisexual or hermaphroditic.
|Malacostraca||Malacostraca comes from the Greek malakós meaning soft and óstrakon meaning shell. The name is misleading, since normally the shell is hard, and is soft only briefly after moulting.|
|Lophogastrida||56||These marine pelagic shrimp make up the order Lophogastrida.
They mostly inhabit relatively deep pelagic waters throughout the world. Love the related opossum shrimp, females lophogastrida carry a brood pouch.
|mantis shrimp||400||Mantis shrimp, so called because they resemble a praying mantis, make up the order Stomatopoda. They grow up to 38 cm (15 in) endless, and can be vividly coloured. Some own powerful spiked claws which they punch into their prey, stunning, spearing and dismembering them. They own been called «thumb splitters» because of the severe gashes they can inflict if handled carelessly.|
|opossum shrimp||1,000||Opossum shrimp belong to the order Mysida.
They are called opossum shrimp because the females carry a brood pouch. Generally less than 3 cm endless, they are not closely related to caridean or penaeid shrimp. They are widespread in marine waters, and are also found in some brackish and freshwater habitats in the Northern hemisphere. Marine mysids can form large swarms and are an significant source of food for numerous fish. Some freshwater mysids are found in groundwater and anchialine caves.
|skeleton shrimp||Skeleton shrimp, sometimes known as ghost shrimp, are amphipods.
Their threadlike slender bodies permit them to virtually vanish among fine filaments in seaweed. Males are generally much larger than females. For a excellent account of a specific species, see Caprella mutica.
|Ostracoda||Ostracod comes from the Greek óstrakon meaning shell. In this case, the shells are in two parts, love those of bivalves or clams.|
|seed shrimp||13,000||Seed shrimp make up the class Ostracoda.
This is a class of numerous little crustacean species which glance love seeds, typically about one millimetre (0.04 in) in size. Their carapace looks love a clam shell, with two parts held together by a hinge to permit the shell to open and shut. Some marine seed shrimp drift as pelagic plankton, but most live on the sea floor and burrow in the upper sediment layer. There are also freshwater and terrestrial species. The class includes carnivores, herbivores, filter feeders and scavengers.
Some mantis shrimp are a foot endless, and own bulging eyes, a flattened tail and formidable claws equipped with clubs or sharp spikes, which it can use to knock out its opponents.