Aztec medicine

Last updated
Drawing accompanying text in Book XII of the 16th-century Florentine Codex (compiled 1540-1585), showing Nahua of conquest-era central Mexico suffering from smallpox. FlorentineCodex BK12 F54 smallpox.jpg
Drawing accompanying text in Book XII of the 16th-century Florentine Codex (compiled 1540–1585), showing Nahua of conquest-era central Mexico suffering from smallpox.

Aztec medicine concerns the body of knowledge, belief and ritual surrounding human health and sickness, as observed among the Nahuatl-speaking people in the Aztec realm of central Mexico. The Aztecs knew of and used an extensive inventory consisting of hundreds of different medicinal herbs and plants. A variety of indigenous Nahua and Novohispanic written works survived from the conquest and later colonial periods that describe aspects of the Aztec system and practice of medicine and its remedies, incantations, practical administration, and cultural underpinnings. Elements of traditional medicinal practices and beliefs are still found among modern-day Nahua communities, often intermixed with European or other later influences.

Contents

Spiritual influences

As with many other Mesoamerican cults, the Aztecs believed that the body contained a balance of three separate entities or souls: the tonalli, the teyolia, and the ihiyotl. This balance affected the health and life of a person. [1] The tonalli, which was commonly attributed with the disease of "soul loss", was located in the upper part of the head. [2] They believed that this life force was connected to a higher power, and the Aztec people had to make sure their tonalli was not lost or did not stray from the head. The teyolia was located in the heart. This entity has been described to be specific to the individual and stood for a person's knowledge and memory. [3] The ihiyotl, which resided in the liver, was strongly attached to witchcraft and the supernatural. It could also leave the body but was always connected through the wind or an individual's breath, “...thus, each individual could affect other people and things by breathing on them.” [1]

The Aztecs used magic to avoid illness and wore amulets as protection from it. Amulet is a small ornament which worn to avoid harm and evil. [4]

Illness from the gods/goddesses

The Aztecs believed in a life after death and heavily influenced by the gods. They believed in Tonatiuh (heaven) on the sun reserved for heroes after death, another heaven (Tlalocan) on earth and the resting place of the dead after dangerous journey in the underworld (Mictlan). The Tonalamatl (religious calendar) had an impactful role on the Aztec belief system. They believed that the Tonalamatl determined everything about the individual except their profession. A person's longevity, luck, sickness, and even their name was determined by the month and day they were born. The Tonalamatl was split into 13 months, each month representing a different god. [5] The Codex Ríos depicts the relationship between human organs and calendar signs, illustrating the magical significance certain organs or body parts held. [6]

Because the calendar had so much authority over a person's life, the day on which someone was born or got sick had great importance and usually gave reference to which god the individual had to pay respect to. It was believed that when you were sick, you were being punished by the gods for your sins in some cases. Specific sicknesses were linked to individual gods and their punishments. [5] Tlaloc, the water god, was responsible for sickness related to wet and cold, such as rheumatic ailments. [2] Tlaloc also was responsible for tremor, delirium and other symptoms of alcoholism for those who abused consuming pulque. To relieve these symptoms, people would travel to mountains and rivers of significance to present the god with offerings. [5]

The flayed god, Xipe Totec, was responsible for skin eruptions and rashes. Common ailments included scabies, boils, and eye diseases. The way to treat this disease was to march in front of others wearing the skins from human sacrifices during the second month. After they did this, Xipe Totec would cure them of their ailments. When people broke vows such as fasting or celibacy, Tezcatlipoca would induce incurable disease. Macuilxochitl (Xochipilli), would send hemorrhoids, boils, and other similar diseases. There were many other gods as well, each connected to their own set of sicknesses. Understanding the reason for the ailments was a primary way of knowing which god sent the punishment. The ailments themselves were often not enough as multiple gods such as the god of pleasure and the god of love used similar punishments. Both would send venereal diseases. The mother of gods (Teteoinam or Toci) was worshiped and followed by those in the medical field. As the goddess of medicine and herbs, her image was always kept in view of medical practitioners. [5]

Ticitl

The word ticitl means "Aztec physician". [7] Alonso de Molina translated ticitl not only as physician, but also as the witch who did horoscope and fortune teller. The medical profession in Aztec society was practiced by both men and women alike. This profession did not have high social standing even though they had to complete special training and have religious and astrological associations. [5] When the illness wasn't serious, the Aztec's priest would often be called upon to take care of the sick. The ticitl had to have great knowledge to treat everyday diseases. Ticitl were also called upon if an illness or injury became serious, such as when a warrior would be wounded in battle. The ticitl were also good at performing surgical procedures by using knives which were made from volcanic glass (obsidian), the Ticitl would use these knives for procedures that involved the removing of tumors and the draining of wounds. Along with these obsidian knives, Ticitl would use different part of plants as tools for their procedures. For example, ticitl would use agave thorns as tools when performing surgeries that involved the eye. Not only did the Ticitl use their skills for medical purposes, their skills were also used for ceremonial purposes, for example, men entering the priesthood would have to be circumcised and the Ticitl were the one who had to perform this procedure due to their surgical skills. [8]

The Ticitl even had a way of classifying different types of wounds and would place them in categories depending on the type of wound. The Ticitl became skilled at treating bone fractures due to them having to heal Aztec warriors that were wounded in battle. They would sew wounds with the help of strong fibers that would come from plants or they would even use strong hair strands from an animal. The Ticitl also had their own methods of stopping a bleeding wound and of relieving pain with the use of plants and even psychedelic mushrooms. [8] Ticitl would also envelope wounds with crushed plants since they believed that the crushed plant can speed up the recovery. [4]

Diagnosis and treatment

Aztecs understood there was a balance between hot and cold in medical practice, bearing resemblance to Humorism. [9] The procedures used by the ticitl were empirical and practical. [10] Ticitl used different parts of plants to make medicines. The plants which were used were sacred to Tlaloc. Yauhtli and iztauhyatl are some plants that were commonly used by the ticitl. Ticitl treat patients by having them inhale, smoke or they would rub the patients by using certain plants. The plants would be ground and mixed to make liquids that would be used as medicines. Sap from the maguey was usually used to treat wounds and other injuries caused by battle. [4]

Some of these treatments were so effective that they are still used in traditional medicine, for example, using maguey or agave sap is still an effective natural treatment because of the antibacterial properties of the maguey sap. Another property that made the use of the sap to be favored and made it an effective treatment is how sticky it is; this property helped the sap absorb moisture and debris from the wound and it would provide a cleansing effect that helped to prevent infection. The Aztec healers also incorporated the use of salt into their treatments because it would help absorb moisture and help decrease inflammation. The Ticitl combined these two ingredients and it improved the effectiveness of treating wounds even further. The addition of salt would draw up moisture even further and this would help promote a faster healing process and it would keep the wound from drying out, which helped to alleviate some of the pain. The Ticitl gained so much knowledge in healing and treating wounds because of how often the Aztecs went to war with other tribes. For example, the Ticitl would use the maguey sap to help cover surgical wounds such as when reattaching severed extremities or stitching back a wound that was obtained during battle. They also found different ways of preparing the maguey sap, for example, using the sap of the same plant at different growing stages or boiling the sap was found to be more effective at treating certain injuries. [11]

Religious treatments were varied based on which god issued the punishment and the ailment itself. [6] During the second month of the Aztec calendar, there is a festival called Tlacaxipehualiztl, honoring "the flayed one". This festival was an important event for those wishing to be cured from the ailments sent by the gods. Those wishing to be cured would cover themselves with agave. Medical practices and treatment consisted of a combination of medical botany and an understanding of the supernatural. Establishing a treatment for any given ailment depended first upon determining the nature of its cause, which could be the result of the supernatural. The presence of a disease could often indicate the existence of a communion with the supernatural world. [5]

Herbal medicine

Aztec Herbal Medicines [12]
Botanical nameNahuatl nameUses
Artemisia mexicana ItztuahyatlWeakness, colic, reduce fever; coughing
Bocconia frutescens CococxihuitlConstipation, abscesses, swelling
Bromelia pinguin Mexocotlheat blisters in the mouth
Carica papaya Chichihualxo-chitlLatex unripe fruit for rash ulcer; ripe fruit digestive
Casimiroa edulis Cochitzapotlsedative
Cassia occidentalis or Cassia alata TotoncaxihuitlAstringent, purgative, anthelmintic, relieves fever, inflammation of rashes
Chenopodium graveolens EpazotlAgainst dysentery, anthelmintic, helps asthmatics breathe
Euphorbia calyculata Cuauhtepatli; chupiriPurgative, skin ailments, mange, skin sores
Helianthus annuus Chilamacatlfever
Liquidambar styraciflua Ocotzotl; xochiocotzotl quanhxihuitlRashes, toothache, tonic for stomach
Montanoa tomentosa CihuapatliDiuretic, oxytocic, cures hydropesia
Passiflora jorullensis CoanenepilliCauses sweating, Diuretic, pain reliever, poisons and snake bites
Perezia adnata PipitzahuacPurgative, cathartic, coughing, sore throat
Persea americana Auacatl; ahuaca quahuitlAstringent, treat sores, remove scars
Pithecolobium dulce QuamochitlAstringent, causes sneezing, cures ulcers and sores
Plantago mexicana AcaxiloticVomit and cathartic
Plumbago pulchella Tlepatli; tletlematil; itzcuinpatliDiuretic, colic, gangrene
Psidium guajava XalxocotlDigestion, dysentery, mange
Rhamnus serrata TlalcapulinDysentery, bloody bowels
Salix lasiopelisQuetzalhuexotlStops blood from rectum, cures fever
Schoenocaulon coulteri; Veratrum frigidum ZoyoyaticCauses sneezing, kills mice/lice/flies
Smilax atristolochiaefolia MecapatliCauses sweating, diuretic, relieves joint pain
Tagetes erecta CempohualxochitlCauses sweating, cathartic, cures dropsy
Talauma mexicana yolloxochitlComforts heart, used against sterility
Theobroma cacao CacahuaquahuitlExcess diarrhea, can cause dizziness

See also

Related Research Articles

<span class="mw-page-title-main">Tláloc</span> Deity in Aztec religion; a god of rain, fertility, and water

Tláloc is the god of rain in Aztec religion. He was also a deity of earthly fertility and water, worshipped as a giver of life and sustenance. This came to be due to many rituals, and sacrifices that were held in his name. He was feared, but not maliciously, for his power over hail, thunder, lightning, and even rain. He is also associated with caves, springs, and mountains, most specifically the sacred mountain where he was believed to reside. Cerro Tláloc is very important in understanding how rituals surrounding this deity played out. His followers were one of the oldest and most universal in ancient Mexico.

<span class="mw-page-title-main">Chacmool</span> Mesoamerican sculpture

A chacmool is a form of pre-Columbian Mesoamerican sculpture depicting a reclining figure with its head facing 90 degrees from the front, supporting itself on its elbows and supporting a bowl or a disk upon its stomach. These figures possibly symbolised slain warriors carrying offerings to the gods; the bowl upon the chest was used to hold sacrificial offerings, including pulque, tamales, tortillas, tobacco, turkeys, feathers, and incense. In Aztec examples, the receptacle is a cuauhxicalli. Chacmools were often associated with sacrificial stones or thrones. The chacmool form of sculpture first appeared around the 9th century AD in the Valley of Mexico and the northern Yucatán Peninsula.

<span class="mw-page-title-main">Aztec mythology</span>

Aztec mythology is the body or collection of myths of the Aztec civilization of Central Mexico. The Aztecs were Nahuatl-speaking groups living in central Mexico and much of their mythology is similar to that of other Mesoamerican cultures. According to legend, the various groups who became the Aztecs arrived from the North into the Anahuac valley around Lake Texcoco. The location of this valley and lake of destination is clear – it is the heart of modern Mexico City – but little can be known with certainty about the origin of the Aztec. There are different accounts of their origin. In the myth, the ancestors of the Mexica/Aztec came from a place in the north called Aztlan, the last of seven nahuatlacas to make the journey southward, hence their name "Azteca." Other accounts cite their origin in Chicomoztoc, "the place of the seven caves", or at Tamoanchan.

<span class="mw-page-title-main">Mayahuel</span>

Mayahuel is the female deity associated with the maguey plant among cultures of central Mexico in the Postclassic era of pre-Columbian Mesoamerican chronology, and in particular of the Aztec cultures. As the personification of the maguey plant, Mayahuel is also part of a complex of interrelated maternal and fertility goddesses in Aztec religion and is also connected with notions of fecundity and nourishment.

<span class="mw-page-title-main">Mictlān</span> Underworld of Aztec mythology

Mictlan is the underworld of Aztec mythology. Most people who die would travel to Mictlan, although other possibilities exist. Mictlan consists of nine distinct levels.

<span class="mw-page-title-main">Centeōtl</span> God of maize in Aztec mythology

In Aztec mythology, Centeōtl is the maize deity. Cintli means "dried maize still on the cob" and teōtl means "deity". According to the Florentine Codex, Centeotl is the son of the earth goddess, Tlazolteotl and solar deity Piltzintecuhtli, the planet Mercury. He was born on the day-sign 1 Xochitl. Another myth claims him as the son of the goddess Xochiquetzal. The majority of evidence gathered on Centeotl suggests that he is usually portrayed as a young man, with yellow body colouration. Some specialists believe that Centeotl used to be the maize goddess Chicomecōātl. Centeotl was considered one of the most important deities of the Aztec era. There are many common features that are shown in depictions of Centeotl. For example, there often seems to be maize in his headdress. Another striking trait is the black line passing down his eyebrow, through his cheek and finishing at the bottom of his jaw line. These face markings are similarly and frequently used in the late post-classic depictions of the 'foliated' Maya maize god.

<span class="mw-page-title-main">Medieval medicine of Western Europe</span>

In the Middle Ages, the medicine of Western Europe was composed of a mixture of existing ideas from antiquity. In the Early Middle Ages, following the fall of the Western Roman Empire, standard medical knowledge was based chiefly upon surviving Greek and Roman texts, preserved in monasteries and elsewhere. Medieval medicine is widely misunderstood, thought of as a uniform attitude composed of placing hopes in the church and God to heal all sicknesses, while sickness itself exists as a product of destiny, sin, and astral influences as physical causes. On the other hand, medieval medicine, especially in the second half of the medieval period, became a formal body of theoretical knowledge and was institutionalized in the universities. Medieval medicine attributed illnesses, and disease, not to sinful behavior, but to natural causes, and sin was connected to illness only in a more general sense of the view that disease manifested in humanity as a result of its fallen state from God. Medieval medicine also recognized that illnesses spread from person to person, that certain lifestyles may cause ill health, and some people have a greater predisposition towards bad health than others.

<span class="mw-page-title-main">Five Suns</span> Creation myth of the Aztecs

In creation myths, the term "Five Suns" refers to the belief of certain Nahua cultures and Aztec peoples that the world has gone through five distinct cycles of creation and destruction, with the current era being the fifth. It is primarily derived from a combination of myths, cosmologies, and eschatological beliefs that were originally held by pre-Columbian peoples in the Mesoamerican region, including central Mexico, and it is part of a larger mythology of Fifth World or Fifth Sun beliefs.

<i>Agave americana</i> Species of flowering plant

Agave americana, commonly known as the century plant, maguey, or American aloe, is a flowering plant species belonging to the family Asparagaceae. It is native to Mexico and the United States, specifically Texas. This plant is widely cultivated worldwide for its ornamental value and has become naturalized in various regions, including Southern California, the West Indies, South America, the Mediterranean Basin, Africa, the Canary Islands, India, China, Thailand, and Australia.

<span class="mw-page-title-main">Aztec Empire</span> Imperial alliance of city states located in central Mexico during the 15th and 16th centuries

The Aztec Empire or the Triple Alliance was an alliance of three Nahua city-states: Mexico-Tenochtitlan, Tetzcoco, and Tlacopan. These three city-states ruled that area in and around the Valley of Mexico from 1428 until the combined forces of the Spanish conquistadores and their native allies who ruled under Hernán Cortés defeated them in 1521.

<span class="mw-page-title-main">Aztec religion</span> Religion used in the Aztec Empire

The Aztec religion is a polytheistic and monistic pantheism in which the Nahua concept of teotl was construed as the supreme god Ometeotl, as well as a diverse pantheon of lesser gods and manifestations of nature. The popular religion tended to embrace the mythological and polytheistic aspects, and the Aztec Empire's state religion sponsored both the monism of the upper classes and the popular heterodoxies.

<span class="mw-page-title-main">Ometochtli</span>

In Aztec mythology, Ometochtli is the collective or generic name of various individual deities and supernatural figures associated with pulque, an alcoholic beverage derived from the fermented sap of the maguey plant. By the Late Postclassic period of Mesoamerican chronology a collection of beliefs and religious practices had arisen in the context of the manufacture and ritualistic consumption of the beverage, known as the "pulque cult" with probable origins in a mountainous region of central Mexico. In Aztec society octli rituals formed a major component of Aztec religion and observance, and there were numerous local deities and classes of sacerdotes ("priests") associated with it.

<span class="mw-page-title-main">Human sacrifice in Aztec culture</span>

Human sacrifice was common in many parts of Mesoamerica, so the rite was nothing new to the Aztecs when they arrived at the Valley of Mexico, nor was it something unique to pre-Columbian Mexico. Other Mesoamerican cultures, such as the Purépechas and Toltecs, and the Maya performed sacrifices as well and from archaeological evidence, it probably existed since the time of the Olmecs, and perhaps even throughout the early farming cultures of the region. However, the extent of human sacrifice is unknown among several Mesoamerican civilizations. What distinguished Aztec practice from Maya human sacrifice was the way in which it was embedded in everyday life. These cultures also notably sacrificed elements of their own population to the gods.

Maya medicine concerns health and medicine among the ancient Maya civilization. It was a complex blend of mind, body, religion, ritual and science. Important to all, medicine was practiced only by a select few, who generally inherited their positions and received extensive education. These shamans acted as a medium between the physical world and spirit world. They practiced sorcery for the purpose of healing, foresight, and control over natural events. Since medicine was so closely related to religion, it was essential that Maya medicine men had vast medical knowledge and skill.

<span class="mw-page-title-main">Medicine in ancient Rome</span>

Medicine in ancient Rome was highly influenced by ancient Greek medicine, but also developed new practices through knowledge of the Hippocratic Corpus combined with use of the treatment of diet, regimen, along with surgical procedures. This was most notably seen through the works of two of the prominent Greek physicians, Dioscorides and Galen, who practiced medicine and recorded their discoveries. This is contrary to two other physicians like Soranus of Ephesus and Asclepiades of Bithynia, who practiced medicine both in outside territories and in ancient Roman territory, subsequently. Dioscorides was a Roman army physician, Soranus was a representative for the Methodic school of medicine, Galen performed public demonstrations, and Asclepiades was a leading Roman physician. These four physicians all had knowledge of medicine, ailments, and treatments that were healing, long lasting and influential to human history.

Tonalli plays a multiplicity of roles; acting as a day sign, body part, and a symbol of the sun's warmth. Ancient Nahua people believed that it was located in the hair and the fontanel area of one's skull, and that the tonalli provided the “vigor and energy for growth and development”. It often overlaps with the force of teyolía which was often considered both an animating force (soul) and the physical heart in various Mesoamerican cultures.

<span class="mw-page-title-main">Prehistoric medicine</span> Medicine in the time before the invention of writing

Prehistoric medicine is any use of medicine from before the invention of writing and the documented history of medicine. Because the timing of the invention of writing per culture and region, the term "prehistoric medicine" encompasses a wide range of time periods and dates.

<span class="mw-page-title-main">Traditional African medicine</span> Traditional medical practices in Africa

Traditional African medicine is a range of traditional medicine disciplines involving indigenous herbalism and African spirituality, typically including diviners, midwives, and herbalists. Practitioners of traditional African medicine claim, largely without evidence, to be able to cure a variety of diverse conditions including cancer, psychiatric disorders, high blood pressure, cholera, most venereal diseases, epilepsy, asthma, eczema, fever, anxiety, depression, benign prostatic hyperplasia, urinary tract infections, gout, and healing of wounds and burns and Ebola.

<span class="mw-page-title-main">History of medicine in the Philippines</span>

The history of medicine in the Philippines discusses the folk medicinal practices and the medical applications used in Philippine society from the prehistoric times before the Spaniards were able to set a firm foothold on the islands of the Philippines for over 300 years, to the transition from Spanish rule to fifty-year American colonial embrace of the Philippines, and up to the establishment of the Philippine Republic of the present. Although according to Dr. José Policarpio Bantug in his book A Short History of Medicine in the Philippines During The Spanish Regime, 1565-1898, there were "no authentic monuments have come down to us that indicate with some certainty early medical practices" regarding the "beginnings of medicine in the Philippines". A historian from the United States named Edward Gaylord Borne described that the Philippines became "ahead of all the other European colonies" in providing healthcare to ill and invalid people during the start of the 17th century, a time period when the Philippines was a colony of Spain. From the 17th and 18th centuries, there had been a "state-of-the-art medical and pharmaceutical science" developed by Spanish friars based on Filipino curanderos that was "unique to the [Philippine] islands."

The consumption of hallucinogenic plants as entheogens goes back to thousands of years. Psychoactive plants contain hallucinogenic particles that provoke an altered state of consciousness, which are known to have been used during spiritual rituals among cultures such as the Aztec, the Maya, and Inca. The Maya are indigenous people of Mexico and Central America that had significant access to hallucinogenic substances. Archaeological, ethnohistorical, and ethnographic data show that Mesoamerican cultures used psychedelic substances in therapeutic and religious rituals. The consumption of many of these substances dates back to the Olmec era ; however, Mayan religious texts reveal more information about the Aztec and Mayan civilization. These substances are considered entheogens because they were used to communicate with divine powers. "Entheogen," an alternative term for hallucinogen or psychedelic drug, derived from ancient Greek words ἔνθεος and γενέσθαι. This neologism was coined in 1979 by a group of ethnobotanists and scholars of mythology. Some authors claim entheogens have been used by priests throughout history, with appearances in prehistoric cave art such as a cave painting at Tassili n'Ajjer, Algeria that dates to roughly 8000 BP. Shamans in Mesoamerica served to diagnose the cause of illness by seeking wisdom through a transformational experience by consuming drugs to learn the crisis of the illness

References

  1. 1 2 Gimmel, Millie (2008). "Reading Medicine in the Codex de la Cruz Badiano". Journal of the History of Ideas. 69 (2): 169–192. doi:10.1353/jhi.2008.0017. JSTOR   30134035. PMID   19127831. S2CID   46457797.
  2. 1 2 de Montellano, Bernard Ortiz (1987). "Caida de Mollera: Aztec Sources for a Mesoamerican Disease of Alleged Spanish Origin". Ethnohistory. 34 (4): 381–399. doi:10.2307/482818. JSTOR   482818.
  3. Maffie, James (December 2000). "'Like a Painting, We Will Be Erased; Like a Flower, We Will Dry Up Here on Earth': Ultimate Reality and Meaning According to Nahua Philosophy in the Age of Conquest". Ultimate Reality and Meaning. 23 (4): 295–318. doi:10.3138/uram.23.4.295. ISSN   0709-549X.
  4. 1 2 3 Kramme, Michael. (1996). Mayan, Incan, and Aztec civilizations (PDF). Lewistown, MO: Mark Twain Media, Inc. p. 106. ISBN   1-58037-051-9. OCLC   35126919.
  5. 1 2 3 4 5 6 Guerra, Francisco (Aug 2012). "AZTEC MEDICINE". Medical History. 10 (4): 315–338. doi:10.1017/S0025727300011455. ISSN   2048-8343. PMC   1033639 . PMID   5331692.
  6. 1 2 Mendoza RG (2003). "Lords of the Medicine Bag: Medical Science and Traditional Practice in Ancient Peru and South America". In Selin H, Hugh S (eds.). Medicine across cultures : history and practice of medicine in non-Western cultures. Science Across Cultures: The History of Non-Western Science. Vol. 3. Dordrecht: Kluwer Academic Publishers. pp. 262–63. doi:10.1007/0-306-48094-8_12. ISBN   0-306-48094-8. OCLC   53984557.
  7. Keoke ED, Porterfield KM (2002). Encyclopedia of American Indian contributions to the world : 15,000 years of inventions and innovations. Porterfield, Kay Marie. New York, NY: Facts on File. pp. 167–68. ISBN   978-1-4381-0990-9. OCLC   241300211.
  8. 1 2 Orozco, Hector (February 2000). "Surgery in Mexico". Archives of Surgery. 135 (2): 266–268. doi:10.1001/archsurg.135.2.226. PMID   10668886 via Ovid.
  9. Barker, Judith C.; Guerra, Claudia; Gonzalez-Vargas, M. Judy; Hoeft, Kristin S. (December 2017). "An ethnographic study of salt use and humoral concepts in a Latino farm worker community in California's Central Valley". Journal of Ethnobiology and Ethnomedicine. 13 (1): 11. doi: 10.1186/s13002-017-0140-4 . ISSN   1746-4269. PMC   5299697 . PMID   28178991.
  10. Seline H (2008). Encyclopaedia of the history of science, technology, and medicine in non-western cultures (2nd ed.). Berlin: Springer. p. 385. ISBN   978-1-4020-4425-0. OCLC   261324840.
  11. Davidson, Judith R. (1983). "The Antibacterial Properties of an Aztec Wound Remedy". Journal of Ethnopharmacology. 8 (2): 149–161. doi:10.1016/0378-8741(83)90051-X. PMID   6645570 via ScienceDirect.
  12. Ortiz de Montellano, Bernard. (1975). Empirical Aztec Medicine. Science. 188. 215-20. 10.1126/science.1090996.

Further reading