Published online by Cambridge University Press: 10 May 2018
Beginning in the second decade of the 19th century, Egyptian agriculture began a process of transformation from basin to perennial irrigation. This shift facilitated the practice of year-round agriculture and the cultivation of summer crops including cotton whose temporalities did not match that of the annual Nile flood. One facet of the perennially irrigated landscape was an increase in the prevalence of the parasitic diseases bilharzia (schistosomiasis) and hookworm, the symptoms of which came to constitute normative experiences of the body among those engaged in perennially irrigated agriculture. Male agricultural laborers, who most often performed the work of irrigation, were at the greatest risk of infection. This article considers the significance of agricultural labor in the continuous making and maintenance of perennially irrigated agriculture and the role of parasitic disease in producing temporal experiences of this labor.
Author's note: I would like to thank the anonymous reviewers selected by IJMES, the organizers and participants of the “Medicine and Knowledge in the Middle East” workshop at the Graduate Center, City University of New York, Beth Baron, and Yoav Di-Capua for their thoughtful comments on drafts of this article. The feedback that I received produced a stronger piece of scholarship. Whatever faults remain are my own.
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13 The barrage gave way soon after its completion and was repaired during the British occupation.
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16 At the turn of the 19th century, smaller weirs existed at Zifta, Asyut, where the Nile River split into its two branches in the Nile Delta. Barrages were completed at Esna and Nag Hammadi in the decades that followed.
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18 This irrigation frontier marked a demarcation in areas with access to state-sponsored perennial irrigation. South of the irrigation frontier, in select regions, the Egyptian Sugar Company and large landowners sponsored the construction of private infrastructure to provide perennial irrigation.
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49 Scott, “The Incidence and Distribution of the Human Schistosomes in Egypt,” 598.
50 Following the completion of the Aswan High Dam, infection with Schistosoma mansoni would come to replace Schistosoma haematobium as the most common form of bilharzia in the Nile Delta and its snail host, Biomphalaria alexandrina, spread south throughout the Delta and into the Nile Valley. When this migration began to take place is an open question, but in the 1930s, Scott had already begun to wonder whether the distribution of the Biomphalaria genus of snails—Planorbis in the classification system of the early 20th century—might be shifting: “Explanations for the restrictions of Planorbis snails to the north of Cairo have all been based on the assumption that some environmental factor makes the district to the south of this point unsuitable to them. The alternative is that they can live and may be slowly spreading southward.” Scott, “The Incidence and Distribution of the Human Schistosomes in Egypt,” 611.
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52 “Bilharzia Work in Egypt,” pp. 3–4, Folder 19, Box 2, Series 2, Claude H. Barlow Papers, RAC.
53 M. Khalil, “The Control of Bilharziasis in Egypt,” in Ankylostomiasis and Bilharziasis in Egypt, 100.
54 In the early 1920s, Khalil argued persuasively that there was nothing that agricultural laborers could feasibly do to protect themselves from infection. Ibid., 98–99.
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60 Scott estimated that in regions with Schistosoma mansoni, approximately 35 percent of the population was infected with both species of the organism; Scott, “The Incidence and Distribution of the Human Schistosomes in Egypt,” 608. In his autopsy examinations, Bilharz found worms in the bladders and recta of his patients, indicating the presence of Schistosoma haematobium and Schistosoma mansoni, as the first is usually confined to the bladder, and the second to the intestinal tract. When the Public Health Department sent a team to Saft al-ʿInab in 1922 to investigate the spate of deaths, 73 percent tested positive for infection with Schistosoma haematobium and 34 percent with Schistosoma mansoni; Khalil, “Parasitic Diseases at Saft el Enab Village,” 160–63.
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63 Scott, “The Incidence and Distribution of the Human Schistosomes in Egypt,” 602–5. The 1922 study of the Schistosoma mansoni outbreak in the village of Saft al-ʿInab showed similar results as the percentage of men infected with Schistosoma mansoni, 37 percent, was 9 percent higher than the 28 percent of women infected. Most of those assessed, both men and women, were field laborers and thus likely to be exposed to infection; Khalil, “Parasitic Diseases at Saft el Enab Village,” 165.
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77 The larva of Ancylostoma duodenale develops between twenty and thirty degrees. Ibid., 779.
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