Metagenomic analysis reveals mixed Mycobacterium tuberculosis infection in a 18th century Hungarian midwife - 21/11/22
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Abstract |
The Vác Mummy Collection comprises 265 well documented mummified individuals from the late 16th to the early 18th century that were discovered in 1994 inside a crypt in Vác, Hungary. This collection offers a unique opportunity to study the relationship between humans and pathogens in the pre-antibiotic era, as previous studies have shown a high proportion of tuberculosis (TB) infections among the individuals. In this study, we recovered ancient DNA with shotgun sequencing from a rib bone sample of a 18th century midwife. This individual is part of the collection and shows clear skeletal changes that are associated with tuberculosis and syphilis. To provide molecular proof, we applied a metagenomic approach to screen for ancient pathogen DNA. While we were unsuccessful to recover any ancient Treponema pallidum DNA, we retrieved high coverage ancient TB DNA and identified a mixed infection with two distinct TB strains by detailed single-nucleotide polymorphism and phylogenetic analysis. Thereby, we have obtained comprehensive results demonstrating the long-time prevalence of mixed infections with the sublineages L4.1.2.1/Haarlem and L4.10/PGG3 within the local community in preindustrial Hungary and put them in context of sociohistorical factors.
Le texte complet de cet article est disponible en PDF.Keywords : Ancient DNA, Metagenomics, Mixed infection, Single nucleotide polymorphisms, Phylogeny
Plan
Vol 137
Article 102181- décembre 2022 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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