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Here we report the results of our own survey and literary published data on the ectoparasite fauna and pathogens of the alien bat species, the Kuhl's pipistrelle Pipistrellus kuhlii (Kuhl, 1817) (Chiroptera: Vespertilionidae). This bat is a host of 36 species of parasitic mites, ticks and insects (including accidental findings) and 13 species of pathogens (protozoa, bacteria, viruses). The flea Ischnopsyllus variabilis is re-corded on this host for the first time. We have found that outside of the host ancestral range, the core of the bat parasite fauna is significantly different due to the loss of host species-specific ectoparasites. Particularly, in Russia, only 6 species of parasitic arthropods have been recorded for Kuhl's pipistrelle and all of them are host genus-specific. At the same time, the features of ecology and occasional finds of extrinsic parasites allow to suggest that P. kuhlii has wide contacts with animals which are the reservoirs of zoonotic infec-tions, that in combination with the fact of isolation of several pathogens from this species (including two coronaviruses) points to a possible medical importance of Kuhl's pipistrelle., Competing Interests: Conflict of interest. The authors declare that they have no conflict of interest., (© Pleiades Publishing, Ltd. 2020, ISSN 2075-1117, Russian Journal of Biological Invasions, 2020, Vol. 11, No. 4, pp. 348–362. © Pleiades Publishing, Ltd., 2020.Russian Text © The Author(s), 2020, published in Rossiiskii Zhurnal Biologicheskikh Invazii, 2020, No. 3, pp. 61–76.)