Ants of medical importance

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Most ants are capable of biting, stinging, and spraying irritant chemicals. [1] However, only relatively few species can harm humans; among which some can cause significant injury or, in rare cases, death. Like wasps, individual ants are capable of stinging multiple times as they do not lose their stingers. [2]

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Fire ants

Red imported fire ant, Solenopsis invicta Fire ants02.jpg
Red imported fire ant, Solenopsis invicta

The fire ants are a group of 20 species of New World ants which are reputed after their aggressiveness and painful stings. Four species are considered of relevant medical importance: Solenopsis invicta , Solenopsis richteri , Solenopsis geminata , and Solenopsis saevissima . The Red Imported Fire Ant S. invicta is the best studied among them, and reputed as the most dangerous species. S. invicta is expanding in range around the world and thus it is most often involved in medical emergencies. A person typically encounters problems with fire ants by inadvertently stepping onto one of their mounds, which causes the ants to swarm up the person's legs, attacking en masse. The ants quickly respond to alarm pheromones that are released by the first disturbed ants, causing a swarm followed by aggressive stinging. Fire ant stings are typically accompanied by burning and urticaria, followed by a welt formation. The welts often develop into white pustules that should not be scratched, as to avoid secondary infections. A few individuals are sensitive to the venom, and can, on rare occasions, die of anaphylaxis. [3] In a survey of 29,300 physicians in the United States of America (in 1989), reports of 83 fatalities were obtained. [4] Some fire ant attacks on humans confined to beds have also been noted; in some locations, fire ants can be a particular threat in medical facilities since they can have nesting colonies inside human habitations. [5]

It has been demonstrated that, whilst the burning sensation and pustule formation is an effect of the sting injecting insoluble venom alkaloids, the more serious allergic reactions are caused by venom protein allergens. [6]

Other species

Argentine ant Linepithema Argentine ant.jpg
Argentine ant

Apart from Solenopsis invicta and Solenopsis richteri , serious allergic reactions are known from ants belonging to 6 different subfamilies (Formicinae, Myrmeciinae, Ponerinae, Ectatomminae, Myrmicinae, and Pseudomyrmecinae) and 10 genera ( Solenopsis , Formica , Myrmecia , Tetramorium , Pogonomyrmex , Pachycondyla , Odontomachus , Rhytidoponera , Pseudomyrmex , and Hypoponera ). [7]

The Argentine ant, Linepithema humile is found in Argentina, Southern Europe, Southern US and California. They are small and are found in human habitations. They often kill other ant species. [8] They have been noted as having the potential to carry pathogens in hospital environments. [9]

The pharaoh ant, Monomorium pharaonis is found around the world. It is not known for its sting, but has been involved in respiratory allergies [10]

Red bulldog ant Red bull ant.jpg
Red bulldog ant

Bulldog ants, from the genus Myrmecia, are native to Australia, with all but one of the ninety or so species found on the continent. Belonging to the ant subfamily Myrmeciinae, they are among the most primitive extant ants in the world. This species is known to cause some fatalities in sensitive humans. [11]

Bullet ant Paraponera clavata MHNT.jpg
Bullet ant

Bullet ants, from the genus Paraponera, are found from Nicaragua southward to the Amazon Basin. They are and close relatives of the genus Dinoponera , which are New World ponerines known for their painful stings. [12]

Driver ants Safari ants.jpg
Driver ants

Driver ants, from the genus Dorylus , are found in the Old World, especially West Africa and the Congo Basin. Unlike the army ants of the New World, Old World army ants have a functional sting but rarely use it, preferring their razor-sharp, falcate mandibles for defense instead. Dorylus spp. colonies also reach larger sizes than Eciton .

The Pogonomyrmex maricopa , found in Western US, are bright red myrmicine ants whose venom is the most potent of any ant species. [13]

See also

Related Research Articles

<i>Paraponera clavata</i> Species of ant

Paraponera clavata, commonly known as the bullet ant, is a species of ant named for its extremely painful sting. It inhabits humid lowland rainforests in Central and South America.

<span class="mw-page-title-main">Fire ant</span> Genus of red ants

Fire ants are several species of ants in the genus Solenopsis, which includes over 200 species. Solenopsis are stinging ants, and most of their common names reflect this, for example, ginger ants and tropical fire ants. Many of the names shared by this genus are often used interchangeably to refer to other species of ant, such as the term red ant, mostly because of their similar coloration despite not being in the genus Solenopsis. Both Myrmica rubra and Pogonomyrmex barbatus are common examples of non-Solenopsis ants being termed red ants.

<span class="mw-page-title-main">Red imported fire ant</span> Species of ant

Solenopsis invicta, the fire ant, or red imported fire ant (RIFA), is a species of ant native to South America. A member of the genus Solenopsis in the subfamily Myrmicinae, it was described by Swiss entomologist Felix Santschi as a variant of S. saevissima in 1916. Its current specific name invicta was given to the ant in 1972 as a separate species. However, the variant and species were the same ant, and the name was preserved due to its wide use. Though South American in origin, the red imported fire ant has been accidentally introduced in Australia, New Zealand, several Asian and Caribbean countries, Europe and the United States. The red imported fire ant is polymorphic, as workers appear in different shapes and sizes. The ant's colours are red and somewhat yellowish with a brown or black gaster, but males are completely black. Red imported fire ants are dominant in altered areas and live in a wide variety of habitats. They can be found in rainforests, disturbed areas, deserts, grasslands, alongside roads and buildings, and in electrical equipment. Colonies form large mounds constructed from soil with no visible entrances because foraging tunnels are built and workers emerge far away from the nest.

<span class="mw-page-title-main">Black imported fire ant</span> Species of ant

The black imported fire ant, or simply BIFA, is a species of ant in the genus Solenopsis. It was long thought to either be a subspecies or a color variation of Solenopsis invicta, but is now recognized as its own species with a demonstratively different range and living habits. BIFA seem to be more tolerant of cold and a less dominant species than RIFA. Due to the BIFA higher body content of water than the RIFA conclusions demonstrate the certain factor plays a role in their differences of living regions. 

<i>Myrmecia</i> (ant) Genus of ants

Myrmecia is a genus of ants first established by Danish zoologist Johan Christian Fabricius in 1804. The genus is a member of the subfamily Myrmeciinae of the family Formicidae. Myrmecia is a large genus of ants, comprising at least 93 species that are found throughout Australia and its coastal islands, while a single species is only known from New Caledonia. One species has been introduced out of its natural distribution and was found in New Zealand in 1940, but the ant was last seen in 1981. These ants are commonly known as bull ants, bulldog ants or jack jumper ants, and are also associated with many other common names. They are characterized by their extreme aggressiveness, ferocity, and painful stings. Some species are known for the jumping behavior they exhibit when agitated.

<i>Dicistroviridae</i> Family of viruses

Dicistroviridae is a family of viruses in the order Picornavirales. Invertebrates, including aphids, leafhoppers, flies, bees, ants, and silkworms, serve as natural hosts. There are 15 species in this family, assigned to three genera. Diseases associated with this family include: DCV: increased reproductive potential. extremely pathogenic when injected with high associated mortality. CrPV: paralysis and death.

<span class="mw-page-title-main">Pharaoh ant</span> Species of ant

The pharaoh ant is a small (2 mm) yellow or light brown, almost transparent ant notorious for being a major indoor nuisance pest, especially in hospitals. A cryptogenic species, it has now been introduced to virtually every area of the world, including Europe, the Americas, Australasia and Southeast Asia. It is a major pest in the United States, Australia, and Europe.

<span class="mw-page-title-main">Jack jumper ant</span> Species of ant endemic to Australia

The jack jumper ant, also known as the jack jumper, jumping jack, hopper ant, or jumper ant, is a species of venomous ant native to Australia. Most frequently found in Tasmania and southeast mainland Australia, it is a member of the genus Myrmecia, subfamily Myrmeciinae, and was formally described and named by British entomologist Frederick Smith in 1858. This species is known for its ability to jump long distances. These ants are large; workers and males are about the same size: 12 to 14 mm for workers, and 11 to 12 mm for males. The queen measures roughly 14 to 16 mm long and is similar in appearance to workers, whereas males are identifiable by their perceptibly smaller mandibles.

Insect sting allergy is the term commonly given to the allergic response of an animal in response to the bite or sting of an insect. Typically, insects which generate allergic responses are either stinging insects or biting insects. Stinging insects inject venom into their victims, whilst biting insects normally introduce anti-coagulants into their victims.

Solenopsin is a lipophilic alkaloid with the molecular formula C17H35N found in the venom of fire ants (Solenopsis). It is considered the primary toxin in the venom and may be the component responsible for the cardiorespiratory failure in people who experience excessive fire ant stings.

<i>Monomorium</i> Genus of ants

Monomorium is a genus of ants in the subfamily Myrmicinae. As of 2013 it contains about 396 species. It is distributed around the world, with many species native to the Old World tropics. It is considered to be "one of the more important groups of ants," considering its widespread distribution, its diversity, and its variety of morphological and biological characteristics. It also includes several familiar pest species, such as the pharaoh ant and the flower ant.

<i>Solenopsis geminata</i> Species of fire ant

Solenopsis geminata or tropical fire ant is a species of fire ants, described by Fabricius in 1804, in the tribe Solenopsidini; it was originally placed in the Atta genus. This species has a pan-tropical distribution.

<span class="mw-page-title-main">Ant venom</span> Medical condition

Ant venom is any of, or a mixture of, irritants and toxins inflicted by ants. Most ants spray or inject a venom, the main constituent of which is formic acid only in the case of subfamily Formicinae.

<i>Solenopsis saevissima</i> Species of ant

Solenopsis saevissima, commonly known in Brazil as formiga de fogo, formiga-vermelha, or formiga-lava-pes, is one of more than 185 species in the genus Solenopsis. It, along with 13 other species, is also a member of the Solenopsis saevissima species group which are popularly known as fire ants.

<span class="mw-page-title-main">Red imported fire ants in the United States</span>

The red imported fire ant, or simply RIFA, is one of over 280 species in the widespread genus Solenopsis. It is native to South America but it has become both a pest and a health hazard in the southern United States as well as a number of other countries.

<i>Myrmecia nigrocincta</i> Species of ant

Myrmecia nigrocincta, commonly known as the jumper ant or jumping jack, is an ant of the genus Myrmecia. The species was first described by Frederick Smith in 1858. Colonies of this ant are abundant in eastern Australia. Ants of this species are known for their ability to jump up to 10 centimetres, and they also have a powerful, venomous sting. Rather than foraging on the ground, M. nigrocincta prefer to forage in trees where they are known to pollinate certain flowers.

The toxicology of fire ant venom is relatively well studied. The venom plays a central role in the biology of Red imported fire ants, such as in capturing prey, and in defending itself from competitors, assailants, and diseases. Some 14 million people are stung annually in the United States, suffering reactions that vary from mild discomfort, to pustule formation, swelling, and in rare cases, systemic reactions followed by anaphylactic shock. Fire ant venoms are mainly composed (>95%) of a complex mixture of insoluble alkaloids added to a watery solution of toxic proteins. For the Red imported fire ant Solenopsis invicta Buren there are currently 46 described proteins, of which four are well-characterised as potent allergens.

In ecology, a tramp species is an organism that has been spread globally by human activities. The term was coined by William Morton Wheeler in the bulletin of the American museum of natural history in 1906, used to describe ants that “have made their way as well known tramps or stow-aways[sic] to many islands The term has since widened to include non-ant organisms, but remains most popular in myrmecology. Tramp species have been noted in multiple phyla spanning both animal and plant kingdoms, including but not limited to arthropods, mollusca, bryophytes, and pteridophytes. The term "tramp species" was popularized and given a more set definition by Luc Passera in his chapter of David F William's 1994 book Exotic Ants: Biology, Impact, And Control Of Introduced Species.

<span class="mw-page-title-main">Ant supercolony</span> Exceptionally large ant colony

An ant supercolony is an exceptionally large ant colony, consisting of a high number of spatially separated but socially connected nests of a single ant species, spread over a large area without territorial borders. Supercolonies are typically polygynous, containing many egg-laying females. Workers and queens from different nests within the same supercolony can freely move among the nests, and all workers cooperate indiscriminately with each other in collecting food and care of the brood, and show no apparent mutual aggressive behavior.

References

  1. Touchard A, Aili SR, Fox EG, Escoubas P, Orivel J, Nicholson GM, Dejean A (January 2016). "The Biochemical Toxin Arsenal from Ant Venoms". Toxins. 8 (1): 30. doi: 10.3390/toxins8010030 . PMC   4728552 . PMID   26805882.
  2. O'Rourke FJ (1956). "The medical and veterinary importance of the formicidae". Insectes Sociaux. 3 (1): 107–118. doi:10.1007/BF02230671. S2CID   27064350.
  3. Rupp MR, deShazo RD, Rupp MR, deShazo RD (March 2006). "Indoor fire ant sting attacks: a risk for frail elders". The American Journal of the Medical Sciences. 331 (3): 134–8. doi:10.1097/00000441-200603000-00005. PMID   16538074. S2CID   3005745.
  4. Rhoades RB, Stafford CT, James FK (August 1989). "Survey of fatal anaphylactic reactions to imported fire ant stings. Report of the Fire Ant Subcommittee of the American Academy of Allergy and Immunology". The Journal of Allergy and Clinical Immunology. 84 (2): 159–62. doi:10.1016/0091-6749(89)90319-9. PMID   2760357.
  5. deShazo RD, Kemp SF, deShazo MD, Goddard J (June 2004). "Fire ant attacks on patients in nursing homes: an increasing problem". The American Journal of Medicine. 116 (12): 843–6. doi:10.1016/j.amjmed.2004.02.026. PMID   15178500.
  6. Zamith-Miranda D, Fox EG, Monteiro AP, Gama D, Poublan LE, de Araujo AF, Araujo MF, Atella GC, Machado EA, Diaz BL (September 2018). "The allergic response mediated by fire ant venom proteins". Scientific Reports. 8 (1): 14427. doi:10.1038/s41598-018-32327-z. PMC   6158280 . PMID   30258210.
  7. Klotz JH, deShazo RD, Pinnas JL, Frishman AM, Schmidt JO, Suiter DR, Price GW, Klotz SA (November 2005). "Adverse reactions to ants other than imported fire ants". Annals of Allergy, Asthma & Immunology. 95 (5): 418–25. doi:10.1016/S1081-1206(10)61165-9. PMID   16312163.
  8. Harris RJ (2002). "Potential impact of the Argentine ant (Linepithema humile) in New Zealand and options for its control" (PDF). Science for Conservation. New Zealand Department of Conservation. 196.
  9. Fowler HG, Bueno OC, Sadatsune T, Montelli AC (June 1993). "Ants as potential vectors of pathogens in hospitals in the state of São Paulo, Brazil". International Journal of Tropical Insect Science. 14 (3): 367–70. doi:10.1017/s1742758400014879. S2CID   86582422.
  10. Kim CW, Choi SY, Park JW, Hong CS (February 2005). "Respiratory allergy to the indoor ant (Monomorium pharaonis) not related to sting allergy". Annals of Allergy, Asthma & Immunology. 94 (2): 301–6. doi:10.1016/S1081-1206(10)61312-9. PMID   15765749.
  11. McGain F, Winkel KD (August 2002). "Ant sting mortality in Australia". Toxicon. 40 (8): 1095–100. doi:10.1016/s0041-0101(02)00097-1. PMID   12165310.
  12. Haddad Junior V, Cardoso JL, Moraes RH (2005). "Description of an injury in a human caused by a false tocandira (Dinoponera gigantea, Perty, 1833) with a revision on folkloric, pharmacological and clinical aspects of the giant ants of the genera Paraponera and Dinoponera (sub-family Ponerinae)". Revista do Instituto de Medicina Tropical de Sao Paulo. 47 (4): 235–8. doi: 10.1590/S0036-46652005000400012 . hdl: 11449/30504 . PMID   16138209.
  13. Meyer WL (May 1996). "Chapter 23: Most Toxic Insect Venom". University of Florida Book of Insect Records. Gainesville, Florida: University of Florida. Archived from the original on 2009-02-08.