Search results for "spill-over"

showing 3 items of 3 documents

The good, the bad and the ugly: Emys trinacris, Placobdella costata and Haemogregarina stepanowi in Sicily (Testudines, Annelida and Apicomplexa)

2016

Endemic Sicilian pond turtles Emys trinacris Fritz, Fattizzo, Guicking, Tripepi, Pennisi, Lenk, Joger et Wink were examined for the presence of haemogregarine parasites. The presence of haemogregarines, occurring mainly in the microgametocyte stage (13.2 ± 0.12 μm in length and 6.4 ± 0.52 μm in width), was observed in approximately 9% of the sampled E. trinacris. Based on the observed morphology and on the sequencing of nuclear 18S rDNA, we identified the parasite as Haemogregarina stepanowi Danilewsky, 1885. Morphometric study of uninfected and infected red blood cells has shown that H. stepanowi induces different changes in erythrocyte shape depending on the infective stage. The different…

0106 biological sciences0301 basic medicineHaemogregarina stepanowiSettore BIO/05 - ZoologiaZoology010603 evolutionary biology01 natural sciencesApicomplexa03 medical and health scienceshaemoprotozoanEucoccidiidaLeechesparasite spill-overRNA Ribosomal 18SAnimalsParasite hostingSicilyPhylogenyEmysbiologyEmys orbicularisItaly; blood parasitism; conservation.; haemoprotozoans; parasite spill-overCoccidiosisEcologyTurtle (syntax)biology.organism_classificationlanguage.human_languageTurtles030104 developmental biologyItalyEmys trinacrisblood parasitismlanguageParasitologyconservation.Sicilian
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The evolution of transmission mode.

2016

This article reviews research on the evolutionary mechanisms leading to different transmission modes. Such modes are often under genetic control of the host or the pathogen, and often in conflict with each other via trade-offs. Transmission modes may vary among pathogen strains and among host populations. Evolutionary changes in transmission mode have been inferred through experimental and phylogenetic studies, including changes in transmission associated with host shifts and with evolution of the unusually complex life cycles of many parasites. Understanding the forces that determine the evolution of particular transmission modes presents a fascinating medley of problems for which there is…

1001infectious disease70complex life cyclesArticlesReview Articlehost shiftsBiological Evolution87Animal DiseasesHost-Parasite InteractionsHost-Pathogen InteractionsAnimalsspill-overPhilosophical transactions of the Royal Society of London. Series B, Biological sciences
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The evolution of transmission mode

2017

This article reviews research on the evolutionary mechanisms leading to different transmission modes. Such modes are often under genetic control of the host or the pathogen, and often in conflict with each other via trade-offs. Transmission modes may vary among pathogen strains and among host populations. Evolutionary changes in transmission mode have been inferred through experimental and phylogenetic studies, including changes in transmission associated with host shifts and with evolution of the unusually complex life cycles of many parasites. Understanding the forces that determine the evolution of particular transmission modes presents a fascinating medley of problems for which there is…

Infectious diseaseSpilloverSettore BIO/05 - ZOOLOGIAinfectious diseasecomplex life cyclesComputingMethodologies_DOCUMENTANDTEXTPROCESSINGHost-shiftsComplex life cycleshost shiftsGeneralLiterature_REFERENCE(e.g.dictionariesencyclopediasglossaries)spill-over
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