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Vet. Sci. 2018, 5(2), 45; https://doi.org/10.3390/vetsci5020045

In Vitro Activity of 30 Essential Oils against Bovine Clinical Isolates of Prototheca zopfii and Prototheca blaschkeae

1
Dipartimento di Scienze Veterinarie, Università di Pisa, 56124 Pisa PI, Italy
2
Scuola Cimi Roma, 00153 Roma RM, Italy
3
Dipartimento di Farmacia, Università di Pisa, 56126 Pisa PI, Italy
4
Istituto Zooprofilattico Sperimentale della Lombardia e dell’Emilia, Sezione di Lodi, 26900 Lodi LO, Italy
*
Author to whom correspondence should be addressed.
Received: 19 March 2018 / Revised: 17 April 2018 / Accepted: 18 April 2018 / Published: 24 April 2018
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Abstract

Protothecal mastitis poses an emergent animal health problem in dairy herds, with a high impact on dairy industries, causing heavy economic losses. Current methods of treating protothecal infections are ineffective, and no drug is licensed for use in cattle. The aim of the present study was to check the antialgal activity of 30 chemically defined essential oils (EOs) against Prototheca zopfii and Prototheca blaschkeae isolated from the milk of dairy cows with mastitis. A microdilution test was carried out to estimate the antialgal effectiveness of the selected chemically defined EOs. The microdilution test showed different degrees of inhibition among the examined Prototheca species. The activity of some of the examined EOs seem interesting. In particular, Citrus paradisi yielded the lowest minimal inhibitory concentration values (0.75%) for both algal species. P. zopfii appeared to be more sensitive to EOs in comparison to P. blaschkeae. The present study investigated the in vitro susceptibility of P. zopfii and P. blaschkeae to a wide range of EOs, obtained from different botanical families. Further investigations are necessary to evaluate the efficacy of EO-based formulations intended for the disinfection of both udder and milking products. View Full-Text
Keywords: Prototheca zopfii; Prototheca blaschkeae; cattle; mastitis; treatment; essential oils; microdilution Prototheca zopfii; Prototheca blaschkeae; cattle; mastitis; treatment; essential oils; microdilution
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Nardoni, S.; Pisseri, F.; Pistelli, L.; Najar, B.; Luini, M.; Mancianti, F. In Vitro Activity of 30 Essential Oils against Bovine Clinical Isolates of Prototheca zopfii and Prototheca blaschkeae. Vet. Sci. 2018, 5, 45.

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