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Selected Publication:

Type of publication: Diploma Thesis
Type of document:

Year: 2016

Authors: Aichberger, Franziska

Title: Die geographische Verbreitung von Candidatus Neoehrlichia mikurensis.

Other title: The geographical distribution of Candidatus Neoehrlichia mikurensis

Source: Diplomarbeit, Vet. Med. Univ. Wien, pp. 38.


Brugger Katharina
Rubel Franz

Duscher Georg

Vetmed Research Units:
Institute of Food Safety, Food Technology and Veterinary Public Health, Unit of Veterinary Public Health and Epidemiology

The aim of this study was to demonstrate the geographical distribution of CandidatusNeoehrlichia mikurensis in Eurasia. Candidatus Neoehrlichia mikurensis is a recently-discovered Gram negative, obligate intracellular bacterium (0.5-1.5 ┬Ám in size). It forms a new genus in the family of the Anaplasmataceae and is transmitted by ticks. To date, it has not been successfully cultured, which is why it is still named Candidatus. Geographical references from a total of 64 papers have been extracted and mapped. A map of Europe and Asia illustrating the geographical distribution of Ca. Neoehrlichia mikurensis, as well as its presence in vectors and hosts, has been produced. In Europe, Ca. Neoehrlichia mikurensis has been reported 196 times in 17 European countries, with the majority of verifications determined in the Netherlands (n=39). The bacterium has been isolated most frequently in the tick vector Ixodes ricinus (n=133) and possible reservoir hosts are thought to be mice, hedgehogs and humans. Ca. Neoehrlichia mikurensis vectors in Europe include five tick species: I. trianguliceps, I. ricinus, I. hexagonus, I. frontalis, Dermacentor reticulatus. In Asia, the occurrence of Ca. Neoehrlichia mikurensis has been demonstrated 51 times in four Asian countries, with the highest number of verified reports in China (n=19). It has been identified primarily in mice (n=24) and potential reservoir hosts are mice, rats, and chipmunks.Relevant tick species in Asia are I. persulcatus, I. pavlovskyi, I. ovatus, und I. granulatus, Haemaphysalis concinna.

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