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Addressing the constraints of Tritrichomonas foetus sample collection in remote areas: lyophilized modified Diamond's media as a substitute for liquid medium

  • Gemma Rush (a1), Michael William Reynolds (a1), Nichola Eliza Davies Calvani (a1) and Jan Šlapeta (a1)

Abstract

Bovine trichomoniasis is a notifiable, reproductive disease of cattle caused by the parasite Tritrichomonas foetus. Culturing with modified Diamond's medium (MDM) is required to increase the low number of organisms received from a preputial sample, but is limited in application to remote areas as it requires continuous cold chain storage. This study utilized lyophilization to sustain the viability of MDM during transport in lieu of a continuous cold chain. All lyophilized MDM was able to sustain T. foetus after storage for 42 days at 24 °C, and the results demonstrated that lyophilized MDM was equally as viable as refrigerated liquid MDM. Storage of lyophilized MDM at room temperature for 1 and 7 days did not impact T. foetus yield, both with and without exposure to light. A limitation of the lyophilized MDM was demonstrated with a significant decrease in T. foetus yield when the media was stored at 37 and 58 °C. The lyophilization of MDM provides a robust method of transporting and storing medium prior to reconstitution and inoculation, for use in T. foetus diagnosis and surveillance in remote areas.

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Corresponding author

Author for correspondence: Jan Šlapeta, E-mail: jan.slapeta@sydney.edu.au

References

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