Interim ICC Report – April 2019 #02 (02.04.19)
Interim ICC Report – April 2019 #02 (02.04.19) – report from Canada on Equine Infectious Anaemia, France on Atypical Myopathy & Strangles, Netherlands on Equine Influenza & Sweden on EHV-4, Strangles, Equine Influenza, EHV-1 Abortion & Equine Coronavirus
Equine Infectious Anaemia (EIA)
On 29 March 2019, positive EIA results were confirmed by the Canadian Food Inspection Agency (CFIA) national reference laboratory for two horses located on a premises in Clear Hills County, Alberta. The horses had been sampled by an accredited veterinarian to comply with U.S. import conditions. No clinical signs of disease were noted at the time of sampling. A CFIA investigation is underway and as per program policy, a quarantine has been placed on the infected horses and their on-premises contact animals. Initial reports indicate there are several equines on the affected premises. The quarantine will remain until all disease response activities have been completed, including follow-up testing and ordering the destruction of positive cases. Trace-out activities may require the CFIA to undertake actions at additional premises as outlined in the current policy.
Since the beginning of 2019, RESPE has identified 13 cases of Atypical Myopathy by its sentinel veterinarians as follows, Ardèche (one case), Ardennes (two cases), Dordogne (one case), Ille-et-Vilaine (one case), Haute-Marne (two cases), Pas-de-Calais (one case), Haute-Saône (one case), Seine-Maritime (one case), Yvelines ( one case), Tarn (one case) and Vienne (one case). Five of these cases were reported in early April.
On 2 April 2019, RESPE confirmed a case of strangles on a premises in Gironde. The affected animal presented with clinical signs including pyrexia and abscessation. Positive diagnosis was confirmed by PCR on a guttural pouch wash. There are a total of 20 in-contacts with a report of a further case with similar clinical signs.
Equine Influenza (EI)
On 28 March 2019, GD Animal Health provided the attached report on recent outbreaks of EI in the Netherlands (for details click here).
On 1 April 2019, the National Veterinary Institute, Uppsala gave the following updates: Equine Herpes Virus 4 (EHV-4) and Streptococcus zooepidemicusIn the county of Västra Götaland, three horses with pyrexia and mild purulent nasal discharge were evaluated for respiratory viruses (EHV-1, EHV-4, EIV, EAV), Streptococcus equi and Streptococcus zooepidemicus by PCR from nasal swabs and nasopharyngeal washes. One horse was positive for EHV-4 and three were positive for Streptococcus zooepidemicus on 6 March, 2019 by PCR as reported by National veterinary institute. Recommendation for quarantine of the premises was issued.
EHV-4 was also confirmed as follows:
– On 6 March 2019, in a foal in the county of Dalarna
– On 8 March 2019, in a horse in the county of Uppsala
– On 15 March 2019, in a horse in the county of Östergötland
– On 15 March 2019 in a herd of young horses in the county of Dalarna
– On 15 March 2019, in a horse in the county of Gästrikland
Clinical signs in these horses as well as in their in-contacts were pyrexia and nasal discharge. The foal also showed anemia, leukopenia and thrombocytopenia. Positive diagnoses was confirmed by PCR from nasal swabs at National veterinary institute. Recommendations for quarantine of these premises were issued.
On 2 March 2019, one case of strangles was reported in Skåne, with a further case reported on 5 March 2019, in a horse that had been imported three weeks earlier from Ireland. On 7 March 2019, on a premises in Örebro a further case was confirmed in a horse presenting with clinical signs of pyrexia and nasal discharge, but no lymphadenopathy. Positive diagnoses were confirmed by PCR on nasopharyngeal wash samples by National veterinary institute. Recommendations for quarantine of the premises were issued.
Equine Influenza (EI)
Outbreaks of EI were reported as follows:
– On 22 March 2019, EI was confirmed in an unvaccinated pony in the county of Västra Götaland. Several other horses, some of them vaccinated, were also affected at a later stage. Clinical signs included, pyrexia, nasal discharge and coughing, except for one vaccinated horse with respiratory signs but no pyrexia.
– On 27 March 2019, EI was confirmed in the county of Skåne, in a Standardbred trotter, after one week of fluctuating pyrexia and mild hindlimb weakness. The horse was negative for EHV-1 and EHV-4. It had been vaccinated against EI with Equip FT on 2 August 2018.
Positive diagnoses were confirmed by PCR on nasopharyngeal swabs by National veterinary institute in both cases. In both premises, a Swedish riding horse had arrived a few days prior to the index case. One of these premises has a neighbouring premises which offers over-night stabling for long-distance transported horses and they are separated by 50 metres, with separate management. Recommendations for quarantine of the premises were issued.
These are the first cases with presumed domestic EI infections in Sweden in two years, since all other reported cases have been from recently imported horses.
Equine Herpes Virus 1 (EHV-1) Abortion
On 26 March 2019, National veterinary institute confirmed a case of EHV-1 abortion by PCR in the county of Norrbotten. The mare was vaccinated for EHV-1,4 twice during this pregnancy. She was stabled with other pregnant mares and active Standardbred trotting race horses, all vaccinated for EHV-1,4. Recommendations for quarantine of the premises was issued.
On 21 March 2019, National veterinary institute confirmed equine coronavirus in a horse in the county of Norrbotten. They confirmed a further case on 27 March 2019, on a premises in Västra Götaland. Clinical signs included, in-appetence, colic and pyrexia, in the first case, with several in-contacts also affected. Positive diagnoses were confirmed by PCR from fecal swabs by National veterinary institute. We have confirmed several outbreaks of equine coronavirus in connection with similar clinical presentations during the last few winters in Sweden.
International Collating Centre