Equine piroplasmosis,
New Zealand
Information received on 08/10/2020 from Dr Tony Zohrab, , Policy and Trade Branch, Ministry for Primary Industries, Wellington , New Zealand
Summary
Report type Follow-up report No. 16 (Final report)
Date of start of the event 22/04/2020
Date of confirmation of the event 22/05/2020
Report date 08/10/2020
Date submitted to OIE 08/10/2020
Date event resolved 29/05/2020
Reason for notification First occurrence of a listed disease
Manifestation of disease Sub-clinical infection
Causal agent Theileria equi
Nature of diagnosis Laboratory (basic), Laboratory (advanced)
This event pertains to the whole country
Related reports Immediate notification (22/05/2020)
Follow-up report No. 1 (29/05/2020)
Follow-up report No. 2 (08/06/2020)
Follow-up report No. 3 (16/06/2020)
Follow-up report No. 4 (25/06/2020)
Follow-up report No. 5 (03/07/2020)
Follow-up report No. 6 (12/07/2020)
Follow-up report No. 7 (21/07/2020)
Follow-up report No. 8 (28/07/2020)
Follow-up report No. 9 (05/08/2020)
Follow-up report No. 10 (13/08/2020)
Follow-up report No. 11 (21/08/2020)
Follow-up report No. 12 (03/09/2020)
Follow-up report No. 13 (11/09/2020)
Follow-up report No. 14 (21/09/2020)
Follow-up report No. 15 (29/09/2020)
Follow-up report No. 16 (08/10/2020)
Outbreaks There are no new outbreaks in this report
Epidemiology
Source of the outbreak(s) or origin of infection
  • Introduction of new live animals
  • Legal movement of animals
Epidemiological comments As part of routine testing for export a four-year-old mare tested positive on antibody ELISA for Theileria equi. The mare was then confirmed positive for T.equi following molecular testing and sequencing. The mare had been previously imported into New Zealand in February 2019, after meeting New Zealand import testing requirements. The mare was subsequently exported from New Zealand on the 26th June 2020. While present in New Zealand the affected mare was resident at two sites, and then held at an isolation area. Sampling and testing of horses present on the mare's primary and secondary place of residence has been completed with negative results. Tracing and testing of horses that were resident on the two properties and subsequently moved off since the arrival of the infected mare on those sites has also now been completed with negative results. The investigation has concluded that the introduction was limited to one imported mare. Transmission of equine piroplasmosis is primarily through a competent tick vector. New Zealand has no confirmed vectors for T.equi. Appropriate surveillance has been completed to demonstrate that T.equi has been eradicated. This event is closed and a self-declaration from New Zealand of its status as a country free from T.equi as of 8 October 2020 will be sent to the OIE.
Control measures
Measures applied
  • Traceability
  • Vaccination permitted (if a vaccine exists)
  • No treatment of affected animals
Measures to be applied
  • No other measures
Future Reporting
The event is resolved. No more reports will be submitted.