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.2021;13(7):115.
doi: 10.1007/s12520-021-01350-z. Epub 2021 Jun 14.

The elusive parasite: comparing macroscopic, immunological, and genomic approaches to identifying malaria in human skeletal remains from Sayala, Egypt (third to sixth centuries AD)

Affiliations

The elusive parasite: comparing macroscopic, immunological, and genomic approaches to identifying malaria in human skeletal remains from Sayala, Egypt (third to sixth centuries AD)

Alvie Loufouma Mbouaka et al. Archaeol Anthropol Sci.2021.

Abstract

Although malaria is one of the oldest and most widely distributed diseases affecting humans, identifying and characterizing its presence in ancient human remains continue to challenge researchers. We attempted to establish a reliable approach to detecting malaria in human skeletons using multiple avenues of analysis: macroscopic observations, rapid diagnostic tests, and shotgun-capture sequencing techniques, to identify pathological changes,Plasmodium antigens, andPlasmodium DNA, respectively. Bone and tooth samples from ten individuals who displayed skeletal lesions associated with anaemia, from a site in southern Egypt (third to sixth centuries AD), were selected.Plasmodium antigens were detected in five of the ten bone samples, and traces ofPlasmodium aDNA were detected in six of the twenty bone and tooth samples. There was relatively good synchronicity between the biomolecular findings, despite not being able to authenticate the results. This study highlights the complexity and limitations in the conclusive identification of thePlasmodium parasite in ancient human skeletons. Limitations regarding antigen and aDNA preservation and the importance of sample selection are at the forefront of the search for malaria in the past. We confirm that, currently, palaeopathological changes such as cribraorbitalia are not enough to be certain of the presence of malaria. While biomolecular methods are likely the best chance for conclusive identification, we were unable to obtain results which correspond to the current authentication criteria of biomolecules. This study represents an important contribution in the refinement of biomolecular techniques used; also, it raises new insight regarding the consistency of combining several approaches in the identification of malaria in past populations.

Supplementary information: The online version contains supplementary material available at 10.1007/s12520-021-01350-z.

Keywords: Immunoassays; Malaria; Palaeopathology; Shotgun-capture sequencing; aDNA.

© The Author(s) 2021.

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Conflict of interest statement

Conflict of interestThe authors declare no competing interests.

Figures

Fig. 1
Fig. 1
Map location of Sayala, Egypt (C. Kurtze, ÖAI @ ÖAW)
Fig. 2
Fig. 2
Top image: an example of cribraorbitalia (stage 1) (EURAC 2235, 2236 — CIII/20) (photo: M. Gamble, with permission from the NHM, Vienna). Bottom images: an example of a bone and a tooth from Sayala skeletal material and from the same individual (EURAC 2235, 2236 — CIII/20) (photo: A. Loufouma Mbouaka, with permission of the NHM, Vienna)
Fig. 3
Fig. 3
Examples of the CO observed on the skeletal material from Sayala. Both the right and left images are from the inferior-anterior aspect with the superior aspect of the cranium to the top of the image. Left photo: superior aspect of orbits from cemetery III, grave 20 (EURAC 2235, 2236) with stage 1 CO. Right photo: superior aspect of orbits from cemetery I, grave 20 (EURAC 2245, 2246) with stage 4 CO (photo: M.Gamble, with permission of the NHM, Vienna)
Fig. 4
Fig. 4
Example of the porosity observed at the femoral necks (left) and popliteal surface/distal metaphyses (right) of the femora from cemetery III, grave 8, individual 2 (EURAC 2229, 2230). Left photo: proximal end of the right and left femora, medial-anterior view. Right photo: distal end of the left and right femora, posterior view (photo: M.Gamble, with permission of the NHM, Vienna)
See this image and copyright information in PMC

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