Interim ICC Report – May 2019 #01 (01.05.19)

Interim ICC Report – May 2019 #01 (01.05.19) – Report from Various Countries on Atypical Myopathy & Belgium on Streptococcus equi subsp. zooepidemicus

Various Countries

Atypical Myopathy

On 1 May 2019, the University of Liege reported 73 cases of Atypical Myopathy in Belgium, France, Czech Republic, Netherlands and UK since 1 April 2019.


The toxin responsible for atypical myopathy is also contained in sycamore seedlings (Acer pseudoplatanus). Currently, there are large number of sycamore seedlings, therefore, it is imperative to avoid equines (horses, donkeys, zebras) ingesting them. It is important to check your grass to make sure it does not contain these seedlings.


The following points may help manage your pasture:

  • temporarily limit access to pastures containing sycamore maple seedlings (or limit 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 the rotation of pastures to offer exclusively lush grasslands;
  • do not place food (hay or other) on the ground;
  • try to destroy the seedlings as early as possible by mowing, harrowing (cutting/ break the cotyledons of the seedlings should kill them) and/ or burn them. For reasons of environmental protection, avoid chemicals. Be careful, do not offer these pastures right away as it has been shown that even faded seedlings still contain the toxin ( Wait until the seedlings have disappeared and the grass have grown;
  • consider cutting branches 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.

Habyarimana et. al., 2018. Émergence de la toxicité printanière et influence des conditions météorologiques sur les risques de myopathie atypique. In Proceedings: 44ème journée de la Recherche Equine, Paris, Paris, France, mars 2018, pp 157-160.

Renaud et al., 2019.  Myopathie atypique : les sources connues et suspectées d’intoxication.  Pratique vétérinaire équine.  Numéro spécial : les maladies du pâturage. 2019, 201, 6-11.

Votion et. al., 2019. Potential new sources of hypoglycin A poisoning for equids kept at pasture in spring: a field pilot study. Veterinary Record 2019, sous presse, DOI : 10.1136/vr.104424.


Invite your contacts to register to receive alert messages via the official Internet site run by researchers at the University of Liege:


If you are aware of a case, please contact:

– as an owner, via the link :

– as a vet, via the link :



Streptococcus equi subsp. zooepidemicus

On 29 April 2019, EFPB confirmed a case of Streptococcus equi subsp. Zooepidemicus on a premises in West Flanders.  The animal aborted at nine months gestation.  Positive diagnosis was confirmed by PCR on lung and liver tissue.



Kind regards

International Collating Centre