Intestinal parasites in the Roman Empire, their regional distribution and ecosocial determinants

As one of the main categories of pathogens, an understanding of parasitic infection in the past is essential to understanding disease in past populations. Evidence for parasites in the human past is steadily growing with examples from many different continents and time periods. Studies have been done in the Roman period however, this evidence does not cover all regions of the Roman empire. At its greatest extent the empire covered much of Europe, North Africa, and parts of the Middle East and different regions had strong cultural influences, not only from pre-existing cultural groups, but also from connections outside the empire. For these reasons there are likely to be variations in disease presence regionally. One of the main aims of this dissertation is to illuminate possible regional variations in parasitic infection in the Roman empire and compare this to earlier and later time periods in order to consider possible explanations for parasite taxonomic diversity in the empire. Archaeological sediments were collected from Roman period sites in previously understudied regions, such as Italy, Turkey, and the frontier regions, as well as pre-Roman and post-Roman time periods that had limited or no data. These samples were analysed for preserved parasite eggs and cysts using microscopy and enzyme-linked immunosorbent assay (ELISA). In the Roman period, predominately soil-transmitted helminths were found in samples from the Mediterranean region while those from northern Europe had additional zoonotic taxa. In the pre-Roman period the taxonomic diversity found was much higher, especially at the Bronze Age site of Must Farm in the marshes of Britain. The parasites found in the post-Roman sites studied here were very similar to that in the Roman period. A consideration of sanitation infrastructure presence, design, and use based on archaeological and historical evidence points to some potential reasons for the consistent presence of roundworm and whipworm across the Roman empire. Additionally, differences in diet, cooking practices, animal husbandry, and climate are considered as contributors to taxonomic diversity in different regions of the empire

Tracing zoonotic parasite infections throughout human evolution

Parasites are useful pathogens to explore human-animal interactions because they have diverse life cycles that often rely on both as hosts. Moreover, some species are not host specific and are transmitted between animals and humans. Today most emerging infections are zoonoses. Here, we take a specific look at the emergence and re-emergence of zoonotic parasites throughout hominin evolution and consider evolutionary, cultural, and ecological factors involved in this. We combine genetic studies focused on molecular phylogenetic reconstructions, most often using the ribosomal RNA gene unit and mitochondrial genes from modern parasites, archaeological evidence in the form of preserved parasite eggs and antigens in skeletal and mummified remains, and modern epidemiological data to explore parasite infections throughout hominin evolution. We point out the considerably ancient origins of some key zoonotic parasites and their long coevolutionary history with humans, and discuss factors contributing to the presence of many zoonotic parasites in the past and today including dietary preferences, urbanization, waste disposal, and the population density of both humans and domesticated animals.This work was supported by a Social Sciences and Humanities Research Council of Canada Doctoral Award (752-2016-2085), The Cambridge Commonwealth, European and International Trust, and Trinity Hall College, University of Cambridge

Intestinal Parasites in an Ottoman Period Latrine from Acre (Israel) Dating to the Early 1800s CE.

The aim of this study is to determine the species of parasites that affected the inhabitants of the city of Acre on the coast of the eastern Mediterranean during the Ottoman Period. This is the first archaeological study of parasites in the Ottoman Empire. We analysed sediment from a latrine dating to the early 1800s for the presence of helminth eggs and protozoan parasites which caused dysentery. The samples were examined using light microscopy and enzyme-linked immunosorbent assay (ELISA) kits. We found evidence for roundworm (Ascaris lumbricoides), whipworm (Trichuris trichiura), fish tapeworm (Dibothriocephalus sp.), Taenia tapeworm (Taenia sp.), lancet liver fluke (Dicrocoelium dendriticum), and the protozoa Giardia duodenalis and Entamoeba histolytica. The parasite taxa recovered demonstrate the breadth of species present in this coastal city. We consider the effect of Ottoman Period diet, culture, trade and sanitation upon risk of parasitism in this community living 200 years ago

A comparative study of parasites in three latrines from Medieval and Renaissance Brussels, Belgium (14th-17th centuries).

The aim of this study is to determine the species of parasite that infected the population of Brussels during the Medieval and Renaissance periods, and determine if there was notable variation between different households within the city. We compared multiple sediment layers from cesspits beneath three different latrines dating from the 14th–17th centuries. Helminths and protozoa were detected using microscopy and enzyme-linked immunosorbent assay (ELISA). We identified Ascaris sp., Capillaria sp., Dicrocoelium dendriticum, Entamoeba histolytica, Fasciola hepatica, Giardia duodenalis, Taenia sp. and Trichuris sp. in Medieval samples, and continuing presence of Ascaris sp., D. dendriticum, F. hepatica, G. duodenalis and Trichuris sp. into the Renaissance. While some variation existed between households, there was a broadly consistent pattern with the domination of species spread by fecal contamination of food and drink (whipworm, roundworm and protozoa that cause dysentery). These data allow us to explore diet and hygiene, together with routes for the spread of fecal–oral parasites. Key factors explaining our findings are manuring practices with human excrement in market gardens, and flooding of the polluted River Senne during the 14th–17th centuries

Intestinal parasites at the Late Bronze Age settlement of Must Farm, in the fens of East Anglia, UK (9th century B.C.E.).

Little is known about the types of intestinal parasites that infected people living in prehistoric Britain. The Late Bronze Age archaeological site of Must Farm was a pile-dwelling settlement located in a wetland, consisting of stilted timber structures constructed over a slow-moving freshwater channel. At excavation, sediment samples were collected from occupation deposits around the timber structures. Fifteen coprolites were also hand-recovered from the occupation deposits; four were identified as human and seven as canine, using fecal lipid biomarkers. Digital light microscopy was used to identify preserved helminth eggs in the sediment and coprolites. Eggs of fish tapeworm (Diphyllobothrium latum and Diphyllobothrium dendriticum), Echinostoma sp., giant kidney worm (Dioctophyma renale), probable pig whipworm (Trichuris suis) and Capillaria sp. were found. This is the earliest evidence for fish tapeworm, Echinostoma worm, Capillaria worm and the giant kidney worm so far identified in Britain. It appears that the wetland environment of the settlement contributed to establishing parasite diversity and put the inhabitants at risk of infection by helminth species spread by eating raw fish, frogs or molluscs that flourish in freshwater aquatic environments, conversely the wetland may also have protected them from infection by certain geohelminths

Intestinal parasites from public and private latrines and the harbour canal in Roman Period Ephesus, Turkey (1st c. BCE to 6th c. CE)

To improve our knowledge of the parasite species affecting the inhabitants of Roman period Asia Minor, we analysed faecal material from Ephesus, Turkey. Mineralised material from the drain from a private house latrine (3rd c. CE), sediment samples from the sewer drain of a public communal latrine (6th c. CE), and sediment from the harbour canal (ca. 1st c. BCE to ca. 6th c. CE) were studied for the presence of intestinal parasites. Samples were viewed by light microscopy for helminth eggs, and commercial enzyme-linked immunosorbent assay (ELISA) kits were used to test for protozoal parasites that cause dysentery. Eggs of roundworm were found in the public latrine, whipworm in the house latrine, and both whipworm and roundworm in the harbour canal. Sequential sampling of the harbour core suggests that whipworm was by far the most common parasite throughout the Roman period, and there was no clear evidence for change in parasite species over the centuries. Whipworm and roundworm are both spread by the contamination of food and drink by human faeces. Despite the large number of travellers to Ephesus, as the capital of its province and a major port city in the Roman Empire, there was a surprising lack of diversity in parasite species found. This is especially apparent when we consider that ten species of intestinal parasite have been found across the Roman Empire. This is the first Roman site to be directly assessed for differences between infection in individuals using private latrines, public latrines, and mixed town effluent (in the harbour) at the same site

Intestinal Parasitic Infection in the Eastern Roman Empire During the Imperial Period and Late Antiquity

While there have been numerous studies investigating intestinal parasitic infection in the Roman period, much of this work has been focused in northern Europe, with major gaps in the eastern empire. In order to further elucidate regional patterns in parasitic infection in the Roman empire, we looked for evidence for parasites in sites from Anatolia and the Balkans. Sediment samples from drains as well as coprolites were studied to find evidence for intestinal parasites in the Roman cities of Viminacium (Serbia) and Sardis (Turkey), and results were combined with previous work in these regions. Each sample was tested for preserved helminth (worm) eggs using microscopy and for intestinal protozoa that cause diarrhea, using enzyme-linked immunosorbent assay (ELISA). Our analysis revealed a predominance of species spread by the contamination of food and water by human feces, namely roundworm and whipworm. The identification of these parasites (which are linked to sanitation and hygiene) in Roman cities in Anatolia and the Balkans is contrasted with the range of zoonotic species found elsewhere in the empire. It appears that variations in cooking practices, diet, urbanization, and climate throughout the empire may have contributed to differences in gastrointestinal diseases in different regions.(1

Parasite infection at the early farming community of Çatalhöyük

The early village at Çatalhöyük (7100–6150 BC) provides important evidence for the Neolithic and Chalcolithic people of central Anatolia. This article reports on the use of lipid biomarker analysis to identify human coprolites from midden deposits, and microscopy to analyse these coprolites and soil samples from human burials. Whipworm (Trichuris trichiura) eggs are identified in two coprolites, but the pelvic soil samples are negative for parasites. Çatalhöyük is one of the earliest Eurasian sites to undergo palaeoparasitological analysis to date. The results inform how intestinal parasitic infection changed as humans modified their subsistence strategies from hunting and gathering to settled farming

A multidisciplinary analysis of cesspits from late medieval and post-medieval Brussels, Belgium : diet and health in the fourteenth to seventeenth centuries

The fill of two late and post-medieval cesspits in Brussels was analyzed using a multidisciplinary approach, including the study of macrobotanical and faunal remains, pollen, and parasite eggs. These show that in the diet plant foods were dominated by cereals while the animal remains document the consumption of mainly fish and birds. The presence of foods that were luxuries at that time would indicate that these were affluent households, although with an admixture of meals related to those of lower socioeconomic status. Seven species of helminth and protozoal parasites were identified, with dominance of those species spread by poor sanitation