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Coprophagia (//) or coprophagy (//) is the consumption of feces. The word is derived from the Greek κόπρος copros, "feces" and φαγεῖν phagein, "to eat". Coprophagy refers to many kinds of feces-eating, including eating feces of other species (heterospecifics), of other individuals (allocoprophagy), or one's own (autocoprophagy) – those once deposited or taken directly from the anus.
In humans, coprophagia has been described since the late nineteenth century in individuals with mental illnesses and in unconventional sexual acts. Some animal species eat feces as a normal behavior, in particular lagomorphs who do so to allow tough plant materials to be digested more thoroughly by passing twice through the digestive tract. Other species may eat feces under certain conditions.
As a medical treatmentEdit
Centuries ago, physicians tasted their patients' feces, to better judge their state and condition.
Lewin reported that "... consumption of fresh, warm camel feces has been recommended by Bedouins as a remedy for bacterial dysentery; its efficacy (probably attributable to the antibiotic subtilisin from Bacillus subtilis) was anecdotally confirmed by German soldiers in Africa during World War II".
As a mental disorderEdit
Coprophilia is a paraphilia, a psychosexual disorder (DSM-5) where the object of sexual interest is feces, and may be associated with coprophagia. Coprophagia is sometimes depicted in pornography, usually under the term scat (from scatology). A notorious example of this is the pornographic shock video 2 Girls 1 Cup.  The 120 Days of Sodom, a 1785 novel by Marquis de Sade is full of detailed descriptions of erotic sadomasochistic coprophagia. The Austrian actor and pornographic director Simon Thaur created the series "Avantgarde Extreme" and "Portrait Extrem", which explores coprophagy, coprophilia, and urolagnia. GG Allin, an American shock rock singer-songwriter, often featured coprophagy in his performances.
François Rabelais, in his classic Gargantua and Pantagruel, often employs the expression mâche-merde or mâchemerde, meaning shit-chewer. This in turn comes from the Greek comedians Aristophanes and particularly Menander, who often use the term skatophagos (σκατοϕφάγος).
Modern Russian writer Vladimir Sorokin's novel Norma describes a society where coprophagia is institutionalised and mandatory.
Coprophagous insects consume and redigest the feces of large animals. These feces contain substantial amounts of semi-digested food, particularly in the case of herbivores, owing to the inefficiency of the large animals' digestive systems. Two feces-eating insects are certain species of fly and the dung beetle. Dung beetles feed on the microorganism-rich liquid component of mammals' dung, and lay their eggs in balls composed mainly of the remaining fibrous material.
Termites eat one another's feces as a means of obtaining their hindgut protists. Termites and protists have a symbiotic relationship (e.g. with the protozoan that allows the termites to digest the cellulose in their diet). For example, in one group of termites, there is a three-way symbiotic relationship: termites of the family Rhinotermitidae, cellulolytic protists of the genus Pseudotrichonympha in the guts of these termites, and intracellular bacterial symbionts of the protists.
Domesticated and wild mammals are sometimes coprophagic, and in some species this forms an essential part of their method of digesting tough plant material.
Species within the Lagomorpha (rabbits, hares, and pikas) produce two types of fecal pellets: hard ones, and soft ones called cecotropes. Animals in these species reingest their cecotropes, to extract further nutrients. Cecotropes derive from chewed plant material that collects in the cecum, a chamber between the large and small intestine, containing large quantities of symbiotic bacteria that help with the digestion of cellulose and also produce certain B vitamins. After excretion of the soft cecotrope, it is again eaten whole by the animal and redigested in a special part of the stomach. The pellets remain intact for up to six hours in the stomach; the bacteria within continue to digest the plant carbohydrates. This double-digestion process enables these animals to extract nutrients that they may have missed during the first passage through the gut, as well as the nutrients formed by the microbial activity. This process serves the same purpose within these animals as rumination (cud-chewing) does in cattle and sheep.
Cattle in the United States are often fed chicken litter. There are concerns that the practice of feeding chicken litter to cattle could lead to bovine spongiform encephalopathy (mad-cow disease) because of the crushed bone meal in chicken feed. The U.S. Food and Drug Administration regulates this practice by attempting to prevent the introduction of any part of a cow's brain or spinal cord into livestock feed. Other countries, like Canada, have banned chicken litter for use as a livestock feed.
The young of elephants, giant pandas, koalas and hippos eat the feces of their mothers or other animals in the herd, in order to obtain the bacteria required to properly digest vegetation found in their ecosystems. When such animals are born, their intestines are sterile and do not contain these bacteria. Without doing this they would be unable to obtain any nutritional value from plants.
Hamsters, guinea pigs, chinchillas, hedgehogs and naked mole-rats eat their own droppings, which are thought to be a source of vitamins B and K, produced by gut bacteria.  On rare occasions gorillas have been observed consuming their feces, possibly out of boredom, a desire for warm food, or to reingest seeds contained in the feces.
- "Coprophagia". Dictionary.com. September 2, 2012.
- Hirakawa, H (2001). "Coprophagy in leporids and other mammalian herbivores". Mammal Review. 31 (1): 61–80. doi:10.1046/j.1365-2907.2001.00079.x.
- Alison M. Moore, Coprophagy in Nineteenth-Century Psychiatry, Microbial Ecology in Health and Disease, Volume 30 (1), 2019, 1-12. DOI: 10.1080/16512235.2018.1535737.
- "Korean Poo Wine". VICE Japan. August 19, 2013.
- notes to The Works of Francis Rabelais, Volume II, Volume 2, p. 56
- Lewin, Ralph A. (2001). "More on merde". Perspectives in Biology and Medicine. 44 (4): 594–607. doi:10.1353/pbm.2001.0067. PMID 11600805.
- Holmes, Ronald M. Sex Crimes: Patterns and Behavior. Thousand Oaks: Sage Publications. p. 244. ISBN 0-7619-2417-5. OCLC 47893709.
- "2 Girls, 1 Cup: The Real Poop". The Smoking Gun. November 30, 2007. Archived from the original on January 2, 2010. Retrieved December 7, 2007.
- le Marquis de Sade (1785) Les 120 journées de Sodome, ou L'École du Libertinage
- Harada KI, Yamamoto K, Saito T (2006). "Effective treatment of coprophagia in a patient with schizophrenia with the novel atypical antipsychotic drug perospirone". Pharmacopsychiatry. 39 (3): 113. doi:10.1055/s-2006-941487. PMID 16721701.
- Rose, E.A.; Porcerelli, J.H. & Neale, A.V. (2000). "Pica: Common but commonly missed". The Journal of the American Board of Family Practice. 13 (5): 353–358. PMID 11001006.
- Rabelais, Book 1, ch. 40 and Book 3 chap. 25
- Thomas Pynchon (1973) Gravity's Rainbow, Part 2, episode 4.
- Nichols, E.;Spector, S.;Louzada, J.;Larsen, T.;Amezquita, S.;Favila, M.E. "Ecological functions and ecosystem services provided by Scarabaeinae dung beetles". Biological Conservation.141(6).1461–1474.
- Noda, S.; Kitade, O.; Inoue, T.; Kawai, M.; Kanuka, M.; Hiroshima, K.; Hongoh, Y.; Constantino, R.; Uys, V.; Zhong, J.; Kudo, T. & Ohkuma, M. (2007). "Cospeciation in the triplex symbiosis of termite gut protists (Pseudotrichonympha spp.), their hosts, and their bacterial endosymbionts". Molecular Ecology. 16 (6): 1257–1266. doi:10.1111/j.1365-294x.2006.03219.x. PMID 17391411.
- Brogan, Jacob (4 November 2016). "Everyone Poops. Some Animals Eat It. Why?". Smithsonian. Retrieved 10 November 2016.
- "rabbit". Encyclopædia Britannica (Standard ed.). Chicago: Encyclopædia Britannica, Inc. 2007.
- The Private Life of the Rabbit, R. M. Lockley, 1964. Chapter 10.
- FDA Urged to Ban Feeding Chicken Litter to Cattle, 2009-11-02, L.A. Times
- "Feeding of Poultry Manure to Cattle Prohibited". Canadian Food Inspection Agency.
- "BBC Nature — Dung eater videos, news and facts". Bbc.co.uk. Retrieved 2011-11-27.
- "Journal The Cornell Veterinarian". Retrieved 2019-09-29.
- "Nutritional Aspects of the Diet of Wild Gorillas" (PDF). Retrieved 2013-06-29.
- "BBC - Earth News - Giant meat-eating plants prefer to eat tree shrew poo".
- "How Hungry Pitcher Plants Get the Poop They Need".