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  • Academic Explanatory, Classical History (600 BCE-600 CE), Environmental History, Explanatory Article, World History
  • November 3, 2016

The Invisible Traveler: Disease on the Silk Roads

Silk Road Map
Silk Road Map
Jeanette Wimberly

Jeanette Wimberly

If we go back to the second and third centuries C.E. and to the trade routes of the Silk Roads, we find the Chinese Han Dynasty and the Roman Empire suffering large-scale outbreaks of epidemic disease.1 The most destructive of these diseases were probably smallpox and measles, and epidemics of bubonic plague may also have erupted.2 Although these diseases are the most well-known, there were many others. We have long suspected that disease traveled via the Silk Roads; and now we have the proof. Piers Mitchell, a paleopathologist at the University of Cambridge states, “This is the earliest evidence for the spread of infectious diseases along the Silk Road, and the first to find evidence at an archaeological site along the Silk Road itself.”3 Without the technology and medicinal techniques we practice today, the fatalities that these populations suffered were devastating.

Xuanquanzhi Site
Xuanquanzhi excavation Site | Courtesy of Journal of Archaeological Science

The silk roads were an extensive series of trade routes that linked much of Eurasia and north Africa.4 The Xuanquanzhi relay station was a well known area along the Silk Roads that housed travelers and relayed messages. It was located in the town of Dunhuang, a key stopping point on the Silk Road within the Hexi Corridor.5 Not only were necessities exchanged here, but so were religions, cultures, and the many diseases. Through a study in China conducted by Doctors Hui-Yuan Yeh, Ruillin Mao, Hui Wang, Wuyun Qi, and Piers D. Mitchell, they were able to prove that Chinese liver fluke, roundworm, whipworm, and tapeworm were spread along the Silk Roads.6

The study took place in Gansu Province, located in north-west China, which contains the Hexi Corridor.7 This corridor formed a section of the Silk Road, an ancient network of thoroughfares extending 4000 miles.8

Hygiene stick found in excavation
Hygiene stick found in excavation, Courtesy of Journal of Archaeological Science

Hygiene sticks were excavated from the latrines at the Xuanquanzhi site in 1992. These sticks were made of wood or bamboo wrapped with cloth, to be used as personal hygiene sticks for wiping.9 Out of the many sticks that were collected, seven of them had remnants of fecal matter still attached. The samples were then mixed with distilled water and trisodium phosphate in order for the parasites to be isolated. The most significant finding was the Chinese liver fluke, as it could not have been endemic at Dunhuang, as the parasite requires a wet marshy environment for its life cycle.10 Due to the discovery of this specific parasite, it proves the argument that the Silk Roads were partly to blame for the mass distribution of diverse diseases. Although there are various ways for diseases to be distributed all over the world, travelers along the Silk Roads provided an easy way for some of the most deadly diseases to travel great distances to devastate two of the largest empires of the ancient world: the Chinese Han Dynasty and the Roman Empire.

  1.  Jerry H. Bentley, Herbert F. Ziegler, and Heather E. Streets-Salter, Traditions & Encounters: A Brief Global History: Volume 1: To 1500, Fourth Edition, vol. 1 (New York, New York: McGraw-Hill Education, 2014), 166. ↵
  2. Bentley, Ziegler, and Streets-Salter, Traditions & Encounters: A Brief Global History, 166. ↵
  3.  Charles Q. Choi,  “Silk Road Gave Infectious Disease a Route, Ancient Poop Shows,” Live Science, July 21, 2016, accessed October 25, 2016, http://www.livescience.com/55505-silk-road-human-feces-infectious-disease.html. ↵
  4. Bentley, Ziegler, and Streets-Salter, Traditions & Encounters: A Brief Global History, 161. ↵
  5.  Hui-Yuan Yeh et al., “Early Evidence for Travel with Infectious Diseases along the Silk Road: Intestinal Parasites from 2000 Year-Old Personal Hygiene Sticks in a Latrine at Xuanquanzhi Relay Station in China,” Journal of Archaeological Science: Reports 9 (October 2016): 759. ↵
  6.  Hui-Yuan Yeh et al., “Early Evidence for Travel with Infectious Diseases along the Silk Road: Intestinal Parasites from 2000 Year-Old Personal Hygiene Sticks in a Latrine at Xuanquanzhi Relay Station in China,” Journal of Archaeological Science: Reports 9 (October 2016): 758. ↵
  7.  Hui-Yuan Yeh et al., “Early Evidence for Travel with Infectious Diseases along the Silk Road: Intestinal Parasites from 2000 Year-Old Personal Hygiene Sticks in a Latrine at Xuanquanzhi Relay Station in China,” Journal of Archaeological Science: Reports 9 (October 2016): 759. ↵
  8.  Hui-Yuan Yeh et al., “Early Evidence for Travel with Infectious Diseases along the Silk Road: Intestinal Parasites from 2000 Year-Old Personal Hygiene Sticks in a Latrine at Xuanquanzhi Relay Station in China,” Journal of Archaeological Science: Reports 9 (October 2016): 759. ↵
  9.  Hui-Yuan Yeh et al., “Early Evidence for Travel with Infectious Diseases along the Silk Road: Intestinal Parasites from 2000 Year-Old Personal Hygiene Sticks in a Latrine at Xuanquanzhi Relay Station in China,” Journal of Archaeological Science: Reports 9 (October 2016): 759. ↵
  10.  Hui-Yuan Yeh et al., “Early Evidence for Travel with Infectious Diseases along the Silk Road: Intestinal Parasites from 2000 Year-Old Personal Hygiene Sticks in a Latrine at Xuanquanzhi Relay Station in China,” Journal of Archaeological Science: Reports 9 (October 2016): 761. ↵

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  • Ancient Epidemic Diseases, Silk Roads

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Jeanette Wimberly

Jeanette Wimberly

Author Portfolio Page

Indo-European Language: The Origin

Communication among humans is essential, and as we evolved, we have come to master the art

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This Post Has 34 Comments

  1. Avatar
    Elizabeth Guardiola 9 Oct 2019 Reply

    I had not heard much about The Silk Road but this article was very insightful! It is interesting to think that after all this time, we were able to discover the cause of the disease outbreaks and epidemics that occurred so long ago. It also further demonstrates the importance of medical and technological advancements for today’s day and age, without it, we would still have those fatal disease outbreaks!

  2. Abigale Carney
    Abigale Carney 22 Aug 2019 Reply

    Very interesting article! The Silk Road was a lifeline for trade among people, which gives me an uneasy feeling that the exchanges carried life necessities as well as diseases. After reading Alexander’s comment, I agree it is shocking that most people believed these illnesses were brought by bad spirits rather than poor hygiene. It is unfortunate that so many people were affected by these diseases, but at least it encouraged people to start practicing better hygiene and led to productive growth within the field of health.

  3. Alexander Manibusan
    Alexander Manibusan 18 Nov 2018 Reply

    The Silk Roads were not only prosperous trade routes, but they were also the paths for how disease can spread with ease. As many know, diseases can spread rapidly, especially when there is a concentrated population. However, it saddens me how back then many thought diseases were caused by bad spirits or bad air, rather than poor hygiene. Great article.

  4. Avatar
    Bictor Martinez 11 Nov 2018 Reply

    With all the exchanging of goods, spices, clothing, etc. between the Silk Road, people did not know what else they were exchanging. It is kinda of crazy to think that these people that were exchanging goods carried diseases that can wipe out possible a whole empire. Thanks to our advanced technology we have today, we were able to see where the deadly diseases originate from. Great article.

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