An update for CA:
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CALIFORNIA DEPARTMENT OF FOOD AND AG UPDATE
Equine Herpes Myeloencephalopathy (EHM) Updates:
EHV-1 Quarantine in Santa Clara County
March 11, 2022: One (1) additional horse on the premises, a 21-year-old Thoroughbred gelding, displaying neurological signs was confirmed positive for Equine Herpesvirus Myeloencephalopathy (EHM) secondary to equine herpesvirus-1 (EHV-1 non-neuropathogenic strain) on March 11th. The gelding was euthanized on March 8th due to severity of clinical signs. CDFA is actively monitoring the situation.
March 10, 2022: An 18-year-old Thoroughbred/Percheron cross gelding in Santa Clara county displaying neurological signs was confirmed positive for Equine Herpesvirus Myeloencephalopathy (EHM) secondary to equine herpesvirus-1 (EHV-1 non-neuropathogenic strain). The gelding was euthanized due to severity of clinical signs. CDFA was onsite and the premises with 168 exposed horses were placed under quarantine. CDFA will closely monitor this situation.
Second EHV-1 Quarantine in San Mateo County
March 11, 2022: One (1) additional horse on the premises displaying fever was confirmed positive for EHV-1 on March 11th. To date, there has been one (1) confirmed EHM case (EHV-1 infection with neurological signs) and two (2) positive EHV-1 fever-only or mild clinical cases associated with this incident. CDFA is actively monitoring the situation.
March 9, 2022: A 15-year-old Quarter Horse cross gelding in San Mateo county displaying neurological signs was confirmed positive for Equine Herpesvirus Myeloencephalopathy (EHM) secondary to equine herpesvirus-1 (EHV-1 non-neuropathogenic strain) on necropsy on March 9th. The gelding was euthanized due to severity of clinical signs. One (1) additional horse displaying fever only with no neurological signs was confirmed positive for EHV-1. CDFA was onsite and the premises with fifty-two (52) exposed horses was placed under quarantine. CDFA will closely monitor this situation.
Third EHV-1 Quarantine in Orange County
March 13, 2022: One (1) additional horse on the premises displaying neurological clinical signs was confirmed positive for EHV-1 on March 13th. To date, there have been two (2) confirmed EHM cases (EHV-1 infection with neurological signs) and fourteen (14) positive EHV-1 fever-only or mild clinical cases associated with this incident. CDFA is actively monitoring the situation.
March 11, 2022: Five (5) additional horses on the premises displaying fever or mild clinical signs only were confirmed positive for EHV-1 on March 11th. To date, there have been one (1) confirmed EHM case (EHV-1 infection with neurological signs) and fourteen (14) positive EHV-1 fever-only or mild clinical cases associated with this incident. CDFA is actively monitoring the situation.
March 10, 2022: Three (3) additional horses on the premises displaying fever were confirmed positive for EHV-1 on March 10th. To date, there have been one (1) confirmed EHM case (EHV-1 infection with neurological signs) and nine (9) positive EHV-1 fever-only or mild clinical cases associated with this incident. CDFA is actively monitoring the situation.
March 9, 2022:One (1) additional horse on the premises displaying fever was confirmed positive for EHV-1 on March 9th. To date, there have been one (1) confirmed EHM case (EHV-1 infection with neurological signs) and six (6) positive EHV-1 fever-only or mild clinical cases associated with this incident. CDFA is actively monitoring the situation.
March 8, 2022:Three (3) additional horses on the premises displaying fever or mild clinical signs were confirmed positive for EHV-1 on March 8th. To date, there have been one (1) confirmed EHM case (EHV-1 infection with neurological signs) and five (5) positive EHV-1 fever-only or mild clinical cases associated with this incident. CDFA is actively monitoring the situation.
March 4, 2022: A 10-year-old Warmblood gelding in Orange county displaying neurological signs was confirmed positive for Equine Herpesvirus Myeloencephalopathy (EHM) secondary to equine herpesvirus-1 (EHV-1 non-neuropathogenic strain) on March 4th. Febrile horses were reported on the premises prior to this EHM case confirmation, including two (2) horses that tested positive for EHV-1. CDFA has been onsite and will quarantine any exposed cohorts. There is no known epidemiological link to any other current EHM incidents at an event premises.
Second EHV-1 Quarantine in Orange County
March 13, 2022: One (1) additional horse on the premises displaying fever or mild clinical signs was confirmed positive for EHV-1 on March 13th. To date, there have been two (2) confirmed EHM cases (EHV-1 infection with neurological signs) and fourteen (14) positive EHV-1 fever-only or mild clinical cases associated with this incident. CDFA is actively monitoring the situation.
March 11, 2022: Three (3) additional horses on the premises displaying fever or mild clinical signs were confirmed positive for EHV-1 on March 11th. To date, there have been two (2) confirmed EHM cases (EHV-1 infection with neurological signs) and thirteen (13) positive EHV-1 fever-only or mild clinical cases associated with this incident. CDFA is actively monitoring the situation.
March 8, 2022:Two (2) additional horses on the premises displaying fever or mild clinical signs were confirmed positive for EHV-1 on March 8th. To date, there have been two (2) confirmed EHM cases (EHV-1 infection with neurological signs) and ten (10) positive EHV-1 fever-only or mild clinical cases associated with this incident. CDFA is actively monitoring the situation.
March 5, 2022:Two (2) additional horses on the premises displaying fever or mild clinical signs were confirmed positive for EHV-1 on March 5th. To date, there have been two (2) confirmed EHM cases (EHV-1 infection with neurological signs) and eight (8) positive EHV-1 fever-only or mild clinical cases associated with this incident. CDFA is actively monitoring the situation.
March 3, 2022: A 22-year-old Thoroughbred gelding in Orange county displaying neurological signs starting on February 28th was confirmed positive for Equine Herpesvirus Myeloencephalopathy (EHM) secondary to equine herpesvirus-1 (EHV-1 non-neuropathogenic strain) on March 3rd. Another horse on the premises, a 22-year-old Warmblood gelding displaying neurological signs starting on March 1st was confirmed positive for EHM secondary to EHV-1 on March 3rd. Both geldings were euthanized due to severity of clinical signs. Additionally, six (6) other horses on the same premises displaying fever only or mild clinical signs have positive tests for EHV-1. 350 exposed horses on the home premises have been isolated and quarantined. CDFA will continue to closely monitor this situation.
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