Situated at the crossroads of Africa, Asia and Europe, Egypt is considered one of the two potential cradles of cat domestication. Zooarchaeological evidence points to cat-human relationships as old as the 4th millennium BC. Later, cats were object of a cult dedicated to the goddess Bastet, and from the 1st millennium BC until the 4th century AD were mummified as votive offerings. Previous ancient DNA (aDNA) investigation showed that cats in ancient Egypt possessed two maternal lineages commonly found in modern domestic cats. Haplotype-C, which spread all over the Old World since Classical Antiquity from Northern Africa, and haplotype-A, which was associated with an earlier cat dispersal from the Levant during the Neolithic. DNA from cat mummies represents a key tool to unravel the role of Egypt as a possible independent centre of domestication, even though the retrieval of aDNA from mummified tissues has greatly been challenged by DNA preservation. Here, we show the preliminary results of aDNA analyses conducted on more than 50 Egyptian cat mummies from Beni Hassan and Gourna (Luxor), dated to the Greco-Roman period. By comparing different methods (e.g. single and double stranded genomic library construction), we provide an extensive case for screening DNA preservation in arid regions, and within different tissues, such as hair, claws, and petrous bones. We also explore the potential to gain novel insights on the dispersal of domestic cats from Egypt in Classical Antiquity through mitochondrial and genome-wide data.
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RBINS Staff Publications 2023
The growing interest in paleopathogenomics and microbial archaeology of the last decade offered the chance to investigate the complex relationships between human hosts and microorganisms, making it possible to identify and characterize the etiologic agents of epidemics in our past [1]. The spread of zoonotic disease in human history was associated with the progressively closer contact with domestic animals[1]. However, the role of animal hosts in the emergence of zoonoses has been only marginally explored, the main focus of paleopathogenomic research being primarily on human hosts. Due to their pivotal role as pest control agents and their long-standing relationship with humans, cats are hosts of several zoonotic diseases representing a threat for human health. Here we present the results of the metagenomic screening for ancient pathogen identification on more than 100 ancient cat remains from different geographic locations (Europe, North Africa and Southwest Asia) spanning several millennia from prehistory to historical times. Various bone substrates (teeth, postcranial skeletal elements, and petrous bones) were analyzed via shotgun sequencing and metagenomic screening with Kraken 2[2] and MetaPhlAn 4[3]. By applying strict authentication guidelines, we provide a framework of ancient microbial DNA preservation in cat remains across time and space, discussing the identification of potential zoonotic candidates. The identification of zoonotic microorganisms in ancient animals represents a yet overlooked field of research, which may offer unprecedented insights into zoonotic epidemics and inter-species transmissibility.
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RBINS Staff Publications 2023