Equine Flu January 2019

Outbreaks

5. Lincolnshire
On 30 January 2019, Rossdales confirmed a case of EI on a premises 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 none developed clinical signs. Virus isolation and sequencing analysis is currently underway at the AHT and details will be made available soon.

4. Lincolnshire
On 17 January 2019, Rossdales confirmed a case of EI on a premises in Lincolnshire. The laboratory confirmed positive is an unvaccinated 12-year-old Shetland Pony that presented with coughing and nasal discharge. There are a total of seven unvaccinated in contacts and four of these are also demonstrating clinical signs consistent with EI. The positive diagnosis was confirmed by PCR on a nasal swab. Virus isolation and sequencing analysis has been carried out at the AHT and confirms that the virus belongs to clade 1 of the Florida sub-lineage of H3N8 equine influenza. The haemagglutinin (HA) and neuraminidase (NA) gene sequences have been made available on the GISAID EpiFlu database (www.gisaid.org).

3. Derbyshire
On 7 January 2019, AHT confirmed a case of EI on a premises in Derbyshire. The affected horse is an unvaccinated 11-year-old Irish Draft that presented with a harsh cough, nasal discharge and pyrexia. The positive diagnosis was made by PCR on a nasopharyngeal swab. There are a total of 14 in contacts, of which 12 are vaccinated. Virus isolation and sequencing analysis has been carried out at the AHT and confirms that the virus belongs to clade 1 of the Florida sub-lineage of H3N8 equine influenza. The haemagglutinin (HA) and neuraminidase (NA) gene sequences will be made available on the GISAID EpiFlu database soon (www.gisaid.org).

2. Cheshire
On 3 January 2019, AHT confirmed a case of EI on a premises in Cheshire. The affected horse was an unvaccinated six-year-old that presented with coughing, moderately increased respiratory effort, mucoid nasal discharge and pyrexia. There are a total of 10 in contacts. The positive diagnosis was made by PCR on a nasopharyngeal swab. Virus isolation is currently underway at the AHT and preliminary sequencing analysis shows that the virus belongs to clade 1 of the Florida sub-lineage of H3N8 equine influenza.

1. Essex
On 2 January 2019, AHT confirmed a case of equine influenza (EI) on a premises in Essex. The affected horse was a recently acquired, unvaccinated five-year-old that presented with coughing and mucopurulent nasal discharge. The positive diagnosis was made by PCR on a nasopharyngeal swab. Virus isolation and sequencing analysis has been carried out at the AHT and confirms that the virus belongs to clade 1 of the Florida sub-lineage of H3N8 equine influenza. The haemagglutinin (HA) and neuraminidase (NA) gene sequences have been made available on the GISAID EpiFlu database (www.gisaid.org).