RESUMO
The authors report the first archaeological case of dog ectoparasitosis in Ancient Egypt. The study of a mummified young dog dated to the Roman period suggests a significant infestation by two blood sucking ectoparasites, respectively the brown dog tick Rhipicephalus sanguineus Latreille, 1806 (Acari: Ixodidae), the louse fly Hippobosca longipennis Fabricius, 1805 (Diptera: Hippoboscidae) as well as puparia of sarcosaprophagous flies (Diptera: Sarcophagidae and Calliphoridae), a potential source of myiasis. All of these species are known to be potential vectors of different pathogens which may be responsible for the premature death of the dog.
RESUMO
The mitochondrial genetic variability in European rabbit (Oryctolagus cuniculus) populations present in Europe and North Africa from 11,000 years ago to the present day has been analyzed using ancient DNA techniques. DNA was extracted from 90 rabbit bones found in 22 archaeological sites dated between the Mesolithic and recent times. Nucleotide sequences present in a variable 233-bp domain of the cytochrome b gene were compared to those present in modern-day rabbits. The results show that the structure of ancient populations of wild rabbit exhibited remarkable stability over time until the Middle Ages. At this time, a novel type of mtDNA molecule abruptly appears into most wild populations studied from France. This mtDNA type corresponds to that currently present in the domestic breeds of rabbit examined so far. The relative rapidity by which this mtDNA type established and its absence in all sites examined before 1,700 years ago lend support to the hypothesis that between 2,000 and 1,000 years ago, man may have favored the development, into all regions of France, of animals carrying this particular mtDNA molecule. The origin of such animals has still to be found: animals previously living outside of France or within France but in very restricted areas? This event was concomitant with the documented establishment of warrens after the tenth century A.D. in Europe.
Assuntos
DNA Mitocondrial/genética , Coelhos/genética , África do Norte , Animais , Sequência de Bases , Evolução Biológica , Osso e Ossos/química , Grupo dos Citocromos b/genética , Primers do DNA/química , Europa (Continente) , Genes , Dados de Sequência Molecular , Alinhamento de Sequência , Homologia de Sequência do Ácido NucleicoRESUMO
The European rabbit (Oryctolagus cuniculus) is now widely distributed throughout the world as a result of transportation by man. The original populations, however, were confined to southern France and Spain. In order to investigate the role of human intervention in determining the genetic diversity of rabbit populations, we are studying the origin of rabbits introduced onto a small Mediterranean island (Zembra) near Tunis over 1400 years ago, by examining ancient DNA extracted from rabbit bones found both on Zembra and on the European mainland. Ancient DNA was successfully extracted from rabbit bones found at two archaeological sites dated to at least the Early Bronze Age (more than 3500 years ago) in south-central France, and compared to that found in modern mainland and island populations using a small variable region of the cytochrome b gene. The results confirm that the Zembra Island population is descended from that present over 1400 years ago. The technical aspects of DNA extraction from bones and the implications of this type of research for determining the origin of introduced rabbit populations are discussed.
