Interim ICC Report – April 2019 #06 (08.04.19)
Interim ICC Report – April 2019 #06 (08.04.19) – Interim Report from Various Countries on Atypical Myopathy, Australia on EHV-1 Abortion, France on EHV-1 Infection & Rotavirus, Germany on Equine Influenza and Ireland on Piroplasmosis, Senegal on Equine Influenza & USA on EHV-1 Neurological Disease
The number of cases of atypical myopathy has increased in the previous few days. As far as possible it is suggested that you:
- Temporarily limit access to pastures containing Sycamore maple seedlings (or grazing to avoid areas where seedlings are present in large numbers)
- Limit pasture time to a few hours a day (the majority of cases grazed> 6h / day)
- Whenever possible, feed the animals before putting them in the meadow
- Organize rotation of pastures to offer exclusively grasslands provided
- Do not place food (hay or other) on the ground
- Try to destroy the seedlings as early as possible (mower, grinder, mowing machine could possibly kill the seedlings, possibly burn them).
- For reasons of environmental protection, avoid chemicals.
- Do not graze these pastures right away because it has been shown that even faded seedlings still contain the toxin.
- Wait until the seedlings break down and the grass grows; –
- Consider the size of maple trees near pastures to avoid the production of flowers and seeds.
For more information of a practical nature, we invite you to consult:
- González-Medina et al., 2019. Atypical myopathy-associated hypoglycin A toxin remains in sycamore seedlings despite mowing, herbicidal spraying or storage in hay and silage. Equine Vet J. doi: 10.1111 / evj.13070. https://www.ncbi.nlm.nih.gov/pubmed/30629759
- Habyarimana and. al., 2018. Emergence of spring toxicity and influence of weather conditions on the risks of atypical myopathy. In Proceedings: 44th Day of Equine Research, Paris, Paris, France, March 2018, pp 157-160. http://hdl.handle.net/2268/233808 Renaud et al., 2019.
- Atypical myopathy: known and suspected sources of intoxication. Veterinary practice equine. Special issue: pasture diseases. 2019, 201, 6-11. https://www.lepointveterinaire.fr/editorial/pve.html Votion and. al., 2019.
- Potential new sources of hypoglycin A poisoning for equids kept at pasture in spring: a field pilot study. Veterinary Record 2019, in press (coming soon), DOI: 10.1136 / vr.104424.
If you know of a case, please let us know via the link http://labos.ulg.ac.be/myopathie-atypique/questionnaire-proprietaire/ – as a veterinarian, via the link http://labos.ulg.ac.be/myopathie-atypique/veterinaire/formulaire-veterinaire/
Equine Herpes Virus-1 (EHV-1) Abortion
On 5 April 2019, ProMED reported a case of EHV-1 abortion during the previous week on a premises in Hunter Valley, New South Wales. During the 2018 breeding season, a number of EHV-1 abortion cases were reported to Hunter Local Land Services (LLS).
Equine Herpes Virus-1 (EHV-1) Infection
On 5 April 2019, RESPE confirmed a case of EHV-1 infection on a premises in Haute Savoie. Positive diagnosis was confirmed by PCR on a nasopharyngeal swab by LABEO Frank Duncombe.
On 5 April 2019, RESPE confirmed a case of rotavirus on a premises in Calvados. Positive diagnosis was confirmed by PCR on a rectal swab by LABEO Frank Duncombe.
Equine Influenza (EI)
On 8 April 2019, Labor Dr. Böse GmbH confirmed an outbreak of EI affecting five unvaccinated Icelandic horses on one premises in Baden-Württemberg. Clinical signs included pyrexia and coughing. Positive diagnoses were confirmed by PCR on nasopharyngeal swabs
Piroplasmosis (Babesia caballi) – update to ICC interim report April 19 #05
A previous ICC was issued regarding this case in February (Feb 19 #15), with further details on the case. The mare in question had foaled (one day before due date) on 16 Feb 2019. The foal was born with premature detachment of the placenta (red bag presentation) and died within three minutes of birth. On 17 Feb 2019, the foal was submitted to a private laboratory for post mortem examination. Tissue samples taken from the foal tested PCR positive for Babesia caballi on 17 Feb 2019. Further retrospective testing of two separate blood samples taken for other reasons from the mare that had been taken on 5 and 9 Feb 2019 were confirmed ELISA and PCR positive for Babesia caballi. The conclusion of the post mortem examination and test results showed lesions consistent with a degree of placental insufficiency, a red bag presentation, and infection of the foal with Babesia caballi on [27 Feb 2019].
Equine Influenza (EI)
On 8 April 2019, the OIE reported two outbreaks of EI in Dakar and Diourbel. There have been 3,651 cases reported and two deaths out of a susceptible populate of 130,253. It was thought that the source of the outbreak was either:
- Contact with infected animal(s) at grazing/watering
- Fromites (humans, vehicles, feed, etc.)
- Airborne spread
Stray donkeys are the main animals affected and are reported to play a role in spreading the disease as well as the groupings at weekly markets and watering points. Confirmation of the serotype is pending. Positive diagnoses were confirmed by Reverse Transcription-PCR. The following control measures are in place:
- Surveillance outside containment and/or protection zone
- Surveillance within containment and/or protection zone
- Ante and post-mortem inspections
- Vaccination permitted (if a vaccine exists)
- No treatment of affection animals
- Movement control inside the country
Equine Herpes Virus-1 (EHV-1) Neurological Disease
The Wyoming Livestock Board confirmed a case of EHV-1 neurological disease in a 15-year-old Quarter Horse Mare on a premises in Johnson County on 5 April. The affected animal presented with neurological signs including hind-end weakness on 3rd April. A strain of the A2254 genotype (non-neuropathogenic strain) of the virus was implicated. The horse is still alive though it remains clinical. It had a history of having been vaccinated against EHV-1. The horse has been isolated and 19 in-contacts have been placed under quarantine. While it is uncertain where the horse had been exposed to infection, it had attended college rodeo events on 15 and 16 March at the Complex in Gillette, Wyoming and on 21-to 24 March at the Goshen County Fairgrounds in Torrington, Wyoming. Any horse attending either of these events should be considered potentially exposed and appropriate precautionary measures taken.
International Collating Centre