Equine piroplasmosis,
New Zealand
Information received on 29/09/2020 from Dr Tony Zohrab, , Policy and Trade Branch, Ministry for Primary Industries, Wellington , New Zealand
Summary
Report type Follow-up report No. 15
Date of start of the event 22/04/2020
Date of confirmation of the event 22/05/2020
Report date 29/09/2020
Date submitted to OIE 29/09/2020
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
Epidemiological comments As part of routine testing for export a four-year-old mare tested positive on antibody ELISA for Theileria equi. The mare had been previously imported into New Zealand in February 2019. While the horse met import testing requirements, investigations suggest that it was infected with T.equi when it was imported. The infected mare is no longer resident in New Zealand. Transmission of equine piroplasmosis is primarily through a competent tick vector. New Zealand has no confirmed vectors for T.equi. 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. To date, no evidence of transmission of T.equi from the infected mare has been detected.
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 continuing. Weekly follow-up reports will be submitted.