Interim ICC Report – February 2019 #06 (11.02.19)

Interim ICC Report Feb 19 #06 (11.02.19) report from France on EHV-1 Respiratory Infection, EHV-4 Respiratory Infection, UK on Equine Influenza & USA on Strangles


Equine Herpes Virus-1 (EHV-1) Respiratory Infection

On 8 February 2019, RESPE reported a case of EHV-1 respiratory infection on a premises in Haute-Garonne. The affected horse was vaccinated and presented with lethargy. The positive diagnosis was made by PCR on a nasopharyngeal swab by LABEO Frank Duncombe and the sample was also positive for EHV-4. The affected horse has been isolated.


Equine Herpes Virus-4 (EHV-4) Respiratory Infection

On 8 February 2019, RESPE reported a case of EHV-4 respiratory infection on a premises in Loire. The affected horses was a 13-year-old Connemara pony that presented with lethargy and nasal discharge. There are a total of 4 in contacts.


On 11 February 2019, RESPE confirmed a case of EHV-4 respiratory infection on a premises in Oise. There are two positives confirmed by PCR on nasopharyngeal swabs by LABEO Frank Duncombe.



Equine Influenza

On 10 February 2019, AHT confirmed an outbreak of EI on a racing yard in Suffolk. There have been a total of four laboratory confirmed infections by PCR on nasopharyngeal swabs. All horses on this premises were sampled as part of tracings being performed following confirmed cases in a racing yard in Cheshire last week. One horse on this premises that had run at Newcastle on 5 February has tested negative. All horses are vaccinated and the positive cases have been reported to be displaying no clinical signs to date.


On 8 February 2019, AHT confirmed a new case of EI on a premises in Middlesex. The affected horse is a non-Thoroughbred that had recently moved from another premises in southeast England and which had only received the first dose of a primary vaccination course several days before being diagnosed with EI. The animal presented with pyrexia and inappetence, coughing and profuse mucopurulent nasal discharge. Positive diagnoses were made by PCR on a nasopharyngeal swab.


On 8 February 2019, additional information was made available regarding the outbreak of EI in six unvaccinated non-Thoroughbreds in Suffolk (ICC Feb 2019 #03). Five days after diagnosis and despite continual veterinary care, one animal deteriorated into respiratory distress and negative energy balance due to inappetence and when laminitis developed the decision was taken to euthanase on humane grounds. The five remaining animals continue to show gradual improvements, under veterinary care and will be retested at the end of a strict isolation period, to demonstrate freedom from infection before being moved from isolation.


On 9 February 2019, AHT confirmed two additional cases of EI on a premises in Suffolk. The affected horses are vaccinated two-year-old Thoroughbreds among a group of around 20 animals. They presented with raised temperatures and nasal discharges. This premises is a separate part of the same complex where eight cases among a group of 15 horses have previously been diagnosed on 4 February 2019 (ICC Feb 2019 #03). No details are yet available as to the specifics of the animals’ vaccination histories. Positive diagnoses was made by PCR on a nasopharyngeal swab.


Equine Influenza – amendment

Please note the following amendment – On 30 January 2019, ICC reported that Rossdales had confirmed a case of EI on a premises in Leicestershire (ICC Feb 2019 #04). Please note, that this premises is actually located in Lincolnshire. The affected horse was a vaccinated five-year-old non-Thoroughbred gelding that presented with coughing, nasal discharge and transient pyrexia (for 24 hours). There were a total of six vaccinated in contacts. All in contacts were closely monitored and all have remained clinically healthy as confirmed today (11 February 2019).




The Washington State Department of Agriculture has confirmed strangles on a premises in Pierce County.  Two horses are affected with the disease which was first noted on the 4 February.  Both have a nasal discharge and are alive but still clinical.


Kind regards

International Collating Centre