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Encyclopedia > Myiasis

Myiasis
Classification & external resources
ICD-10 B87
ICD-9 134.0

Myiasis is an animal or human disease caused by parasitic dipterous fly larvae feeding on the host's necrotic or living tissue. Colloquialisms for Myiasis include "fly-strike" and "fly-blown". The International Statistical Classification of Diseases and Related Health Problems (commonly known by the abbreviation ICD) provides codes to classify diseases and a wide variety of signs, symptoms, abnormal findings, complaints, social circumstances and external causes of injury or disease. ... The following codes are used with International Statistical Classification of Diseases and Related Health Problems. ... The International Statistical Classification of Diseases and Related Health Problems (commonly known by the abbreviation ICD) provides codes to classify diseases and a wide variety of signs, symptoms, abnormal findings, complaints, social circumstances and external causes of injury or disease. ... The following is a list of codes for International Statistical Classification of Diseases and Related Health Problems. ... A parasite is an organism that spends a significant portion of its life in or on the living tissue of a host organism and which causes harm to the host without immediately killing it. ... Suborders Nematocera (includes Eudiptera) Brachycera Diptera (di - two, ptera - wings), or true flies, is the order of insects possessing only a single pair of wings on the mesothorax; the metathorax bears a pair of drumstick like structures called the halteres, the remnants of the hind wings. ... Necrosis (in Greek Νεκρός = Dead) is the name given to unprogrammed death of cells/living tissue (compare with apoptosis - programmed cell death). ... Biological tissue is a collection of interconnected cells that perform a similar function within an organism. ...


German entomologist Fritz Zumpt describes myiasis as "the infestation of live human and vertebrate animals with dipterous larvae, which at least for a period, feed on the host's dead or living tissue, liquid body substances, or ingested food." Fritz Konrad Ernst Zumpt (1908 – 1985) was a German entomologist who worked mainly in Africa . ...

Contents

Classifications

Two different classifications of myiasis can be adopted:

  • The classical classification describes the myiasis by the infected area of the host. This is the classification used by ICD-10. For example: dermal, sub-dermal, cutaneous (B87.0), nasopharyngeal (B87.3), ocular (B87.2), intestinal/enteric (B87.8), or urogenital (B87.8).
  • Another classification is based on the relationship between the host and the parasite and provides insight into the biology of the fly species causing the myiasis and its likely effect. Thus the myiasis is described as either obligatory or facultative or accidental.

The International Statistical Classification of Diseases and Related Health Problems (commonly known by the abbreviation ICD) provides codes to classify diseases and a wide variety of signs, symptoms, abnormal findings, complaints, social circumstances and external causes of injury or disease. ... The dermis is the layer of skin beneath the epidermis that consists of connective tissue and cushions the body from stress and strain. ... This article is about skin in the biological sense. ... An eyepiece, or ocular lens, is a type of lens that is attached to a variety of optical devices such as telescopes and microscopes. ... The intestine is the portion of the alimentary canal extending from the stomach to the anus and, in humans and other mammals, consists of two segments, the small intestine and the large intestine. ... A sex organ, or primary sexual characteristic, narrowly defined, is any of those parts of the body (which are not always bodily organs according to the strict definition) which are involved in sexual reproduction and constitute the reproductive system in an complex organism; namely: Male: penis (notably the glans penis... An obligation can be legal or moral. ... An accidental is a musical notation symbol used to raise or lower the pitch of a note. ...

Flies responsible for Myiasis

There are three main fly families causing economically important myiasis in livestock and also, occasionally, in humans: Suborders Nematocera (includes Eudiptera) Brachycera Diptera (di - two, ptera - wings), or true flies, is the order of insects possessing only a single pair of wings on the mesothorax; the metathorax bears a pair of drumstick like structures called the halteres, the remnants of the hind wings. ...

Other families occasionally involved are: Families  Calliphoridae  Mystacinobiidae  Oestridae  Rhinophoridae  Sarcophagidae  Tachinidae Oestroidea is a superfamily of Calyptratae. ... Subfamilies Calliphorinae Chrysomyiinae The Blowflies are members of the family Calliphoridae of flies (Diptera). ... Subfamilies Miltogramminae Sarcophaginae Fleshflies, family Sarcophagidae, are insects that are often mistaken for common houseflies, although they are somewhat larger in size. ...

The adult flies are not parasitic, but when they lay their eggs in open wounds and these hatch into their larval stage (also known as maggots or grubs), the larvae feed on live and/or necrotic tissue, causing myiasis to develop. They may also be ingested or enter through other body apertures. Common names of piophila casei: Adult: Cheese fly Bacon fly Larva: Cheese skipper Bacon skipper Ham skipper Cheese maggot Cheese hopper Cheese flies are members of the family Piophilidae of flies (Diptera). ... Stratiomyidae, or soldier flies are a family of Diptera Orthorrhapha. ... Genera many genera about 5,000 species The flower flies or hoverflies are a family of flies (Diptera), scientifically termed Syrphidae. ... Superficial bullet wounds In medicine, a wound is a type of physical trauma wherein the skin is torn, cut or punctured (an open wound), or where blunt force trauma causes a contusion (a closed wound). ... Larvae are the plural of larva, juvenile form of animals with indirect development. ... http://www. ... Grub or GRUB can mean: a slang term for food a beetle larva that resembles a worm a distributed commercial search engine: see Grub (search engine) a number of places in Switzerland, Austria and Germany, such as: Grub, canton of Appenzell Outer Rhodes, Switzerland Grub, Germany for the GNU project...


Control Methods - Prevention and Treatment

The first control method is preventive and aims to eradicate the adult flies before they can cause any damage and is called vector control. The second control method is the treatment once the infestation is present, and concerns the infected animals (or humans). Traditionally in medicine, a vector is an organism that does not cause disease itself but which spreads infection by conveying pathogens from one host to another. ...


Prevention

The principal control method of adult populations of myiasis inducing flies involves insecticide applications in the environment where the target livestock is kept. Organophosphorus or organochlorine compounds may be used, usually in a spraying formulation. One alternative prevention method is the SIT (Sterile Insect Technique) where a significant number of artificially reared sterilized (usually through irradiation) male flies are introduced. The male flies compete with wild bred males for females in order to copulate and thus cause females to lay batches of unfertilised eggs which can't develop into the larval stage. An insecticide is a pesticide used against insects in all developmental forms. ... An insecticide is a pesticide used against insects in all developmental forms. ... An insecticide is a pesticide used against insects in all developmental forms. ... El Salvador successfully demonstrated the sterile insect technique eliminating the malaria causing mosquito, from a region for a period of time. ...


Another prevention method involves removing the environment most favourable to the flies. One example of this is the crutching of sheep, which involves the removal of wool from around the tail and between the rear legs, which is a favourable environment for the larvae. Another more permanent practice which is used in some countries is mulesing, where skin is removed from young animals to tighten remaining skin - leaving it less prone to fly attack.[1] PETA have been campaigning to have farmers cease mulesing, they have used celebrities such as Pink, Toni Collette and Chrissie Hynde have also participated in PETA's campaign against the mulesing practice.[2] Crutching is the removal of wool from around the tail and between the rear legs of a sheep. ... Mulesing is the surgical removal of strips of wool-bearing wrinkle skin from around the tail of a sheep. ... Peta can refer to: Peta (prefix), a prefix meaning times 1015 in the International System of Units People for the Ethical Treatment of Animals (PETA), an animal-rights organization People Eating Tasty Animals, a parody of People for the Ethical Treatment of Animals Peta, Greece, a town in the prefecture... Alecia Beth Moore (born on September 8, 1979), known professionally as P!nk or Pink, is a Grammy Award-winning American singer-songwriter who gained prominence in 2000, and has since sold over 20 million albums. ... Toni Collette promoting In Her Shoes Antonia Collette (born November 1, 1972) is an Academy award-nominated Australian actress. ... Image:The Pretenders-Greatest Hits. ...


Treatment

This applies once an infection is underway. First the larvae must be eliminated through pressure around the lesion and the use of forceps. Secondly the wound must be cleaned and disinfected. Further control is necessary to avoid further reinfection.


It is also possible to treat livestock with the use of slow release boluses containing ivermectin which can provide long term protection against the larvae development. Look up bolus in Wiktionary, the free dictionary. ... Ivermectin is an anti-parasite medication and is effective against most common intestinal worms (except tapeworms), most mites, and some lice. ...


Sheep may be dipped, which involves drenching the sheep in insecticide to prevent the growth of the larvae. The term sheep dip refers to a solution of insecticide and fungicide which shepherds may use to protect their sheep from infestation. ...


Use of Myiasitic maggots in Medicine

Through the ages maggots have been used in medicine in order to clean out necrotic wounds. For more information, see Maggot therapy. medicines, see medication and pharmacology. ... Superficial bullet wounds In medicine, a wound is a type of physical trauma wherein the skin is torn, cut or punctured (an open wound), or where blunt force trauma causes a contusion (a closed wound). ... Maggot Therapy (also known as Maggot Debridement Therapy (MDT), larval therapy, larva therapy, or larvae therapy), is the intentional introduction by a health care practitioner of live, disinfected maggots or fly larvae into the non-healing skin and soft tissue wound(s) of a human or other animal for the...


Maggot Therapy (also known as Maggot Debridement Therapy (MDT), larval therapy, larva therapy, or larvae therapy), is the intentional introduction by a health care practitioner of live, disinfected maggots or fly larvae into the non-healing skin and soft tissue wound(s) of a human or other animal for the purpose of selectively cleaning out only the necrotic (dead) tissue within a wound in order to promote wound healing. Maggot Therapy (also known as Maggot Debridement Therapy (MDT), larval therapy, larva therapy, or larvae therapy), is the intentional introduction by a health care practitioner of live, disinfected maggots or fly larvae into the non-healing skin and soft tissue wound(s) of a human or other animal for the...


External links


  Results from FactBites:
 
myiasis - definition of myiasis in Encyclopedia (498 words)
Myiasis is an animal or human disease caused by parasitic dipterous flies.
A clear description of myiasis is "the infestation of live human and vertebrate animals with dipterous larvae, which at least for a period, feed on the host's dead or living tissue, liquid body substances, or ingested food." (Zumpt)
The principal control method of adult populations of myiasis inducing flies is through the use of insecticide applications in the environment where the target livestock is kept.
Intestinal Myiasis -- Washington (914 words)
Editorial Note: Myiasis is the infestation of live human and vertebrate animals with fly (dipterous) larvae, which, at least for a certain period, feed on dead or living tissue or ingested food of the host (1).
Intestinal myiasis occurs when fly eggs or larvae previously deposited in food are ingested and survive in the gastrointestinal tract.
Treatment of all forms of myiasis includes occlusive salves and dressings for cutaneous myiasis (7,8); manual removal of larvae in aural, genitourinary, and nasopharyngeal myiasis (7,9); application of a 15% chloroform in light vegetable oil solution (followed by manual removal) in wound myiasis (8); and administration of a mild cathartic agent in intestinal myiasis (10).
  More results at FactBites »

 

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