Interim ICC Report – January 19 #17 (31.01.19)
Interim Report Jan 19 #17 (31.01.19) – Report from France on EHV-4 REspiratory Infection & Strangles, Germany on Equine Influenza, Sweden on EHV-1 Abortion, EHV-1 Neurological Disease & Strangles Multiple cases of undiagnosed blindness, USA Equine Influenza
Equine Herpes Virus-4 (EHV-4) Respiratory Infection
On 30 January 2019, RESPE reported two separate cases of EHV-4 respiratory infection. The first was on a premises in Calvados. The second case was in Orne. Positive diagnoses were confirmed by PCR on nasopharyngeal swabs by LABEO Frank Duncombe.
On 30 January 2019, RESPE reported two separate cases of strangles. The first was on a premises in Orne. The second was on a premises in Eure-et-Loire. Positive diagnoses were confirmed by PCR on nasopharyngeal swabs by LABEO Frank Duncombe.
On 31 January 2019, Labor Dr. Böse GmbH confirmed three cases of EI on the sames premises in North Rhine-Westphalia. The unvaccinated horses presented with pyrexia and coughing. Diagnoses were confirmed by PCR on a nasopharyngeal swabs.
A further case in one horse on a premises in Schleswig-Holstein was also confirmed by Labor Dr. Böse GmbH. The horse presented with pyrexia and coughing. The vaccination status is currently unknown. Diagnosis was confirmed by PCR on a nasopharyngeal swab.
Equine Herpes Virus-1 (EHV-1) Abortion
On 3 January 2019, Svensk Travsport confirmed a case of EHV-1 abortion in Örnsköldsvik, Västernorrland. Diagnosis was confirmed by PCR. Isolation measures have been recommended.
Equine Herpes Virus-1 (EHV-1) Neurological Disease
On 4 January 2019, Svensk Travsport confirmed an outbreak of EHV-1 neurological disease at a livery yard in Stockholm. Of the 63 horses on the premises, 16 have shown clinical signs, seven of these are confirmed EHV-1 neurological cases and two of the seven have been euthansed. More cases are thought likely. Isolation measures have been recommended.
A further case of EHV-1 neurological disease was confirmed in a private stable in Uppsala on 11 January 2019. Isolation measures have been recommended.
During January 2019, 12 suspected cases of strangles were reported, of which one has been confirmed.
Multiple cases of undiagnosed blindness
Svensk Travsport also want to report on a current unusual, and still unsolved outbreak with many blind horses in a herd in the county of Uppsala. There are no other clinical signs of disease than loss of vision. It is not clear what the cause of this outbreak is, no infectious agent has been isolated and a toxic cause is also plausible. The horses have developed bilateral blindness due to retinal degeneration and rapidly developing cataracts during the last 8 months. Optical neuritis has been observed. Several horses have also presented with elevated hepatic enzymes in their blood, indicating liver affection. Initially, the herd included 54 horses of different breeds (Welsh Mountain ponies, Shetland ponies, Miniature horses and a few Warmblood horses), The first case was an stallion that was imported from the UK in the summer of 2017. The first case was diagnosed in April 2018, two new cases in September2018, followed by new cases every month ever since. 7 horses are now euthanized because of blindness, there are at least 7 more cases affected and more cases showing up. Cases includes horses of all ages, and three different breeds. Birdsfoot trefoil (Lotus corniculatus), is growing really extensively at the field (but not at pastures), and almost 80% of the hay silage consists of this plant. The horses eat this forage during October to May. An infectious cause is a potential differential diagnosis, but we are also investigating toxins or deficiencies. Details of ophthalmologic and pathologic findings are available. We are thankful for ideas in this investigation. Please contact us in the first instance on the above email in this report.
An outbreak of equine influenza has been reported on a premises in Sonoma County, California. The disease has been confirmed in two horses, with several other horses similarly clinically affected but not yet confirmed. The first horse is a two-year-old Lusitano gelding that was noted with a nasal discharge and a cough on 12 January. It is alive though still clinical. The second case is ten-year-old Warmblood gelding. It presented with a cough, nasal discharge and a fever on 15 January. It is alive and doing well.
International Collating Centre