Thursday, July 5, 2018

PRO/AH/EDR> Equine herpesvirus - North America (24): USA (CA) equine

EQUINE HERPESVIRUS - NORTH AMERICA (24): USA (CALIFORNIA) EQUINE
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Date: Mon 2 Jul 2018
Source: The Horse [edited]
<https://thehorse.com/159185/cdfa-confirms-ehm-ehv-1-cases/>


Veterinarians confirmed a 15-year-old pony mare displaying neurologic
signs of equine herpesvirus myeloencephalopathy (EHM) on 27 Jun 2018.
The mare originated from a San Mateo county facility, and an
additional horse originating from the same property -- a 24-year-old
Tennessee walking horse mare -- displayed a fever and tested positive
for equine herpesvirus-1 (EHV-1).

Authorities have isolated and placed both mares under quarantine, and
enhanced biosecurity is in effect. Exposed horses will be monitored
for clinical signs, and temperatures will be taken twice daily. Any
horse displaying a fever or compatible clinical signs will be tested.
The California Department of Food and Agriculture (CDFA) will continue
to monitor the situation and release new information as it becomes
available.

Equine herpesvirus infection in horses can cause respiratory disease,
abortion in mares, neonatal foal death, and neurologic disease. EHM
might be caused by damage to blood vessels of the brain and spinal
cord associated with EHV-1 infection. It's often due to the
neuropathogenic strain of EHV-1 but can occasionally be caused by the
non-neuropathogenic strain of the virus.

EHV-1 spreads easily and typically has an incubation period between
2-10 days. Respiratory shedding of the virus generally occurs for 7-10
days but can persist longer in infected horses. For this reason,
veterinarians recommend a 21-day isolation period of
confirmed-positive EHM cases, along with stringent biosecurity
protocols. Like herpesviruses in other species, the latent form of
EHV-1 can reactivate later but generally with a low viral load, posing
a low risk of infecting other horses. Humans are not at risk of
contracting the virus; however, humans can act as indirect modes of
transmission.

[Byline: Michelle Anderson]

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Communicated by:
ProMED-mail
<promed@promedmail.org>

[Unfortunately there is not a vaccine for this nasty disease.
Biosecurity is required to keep this disease from spreading, which it
can, easily. Wash your hands often. One water bucket per horse. If you
think you may have been around an infected horse, then changing your
clothes before contacting your animals may be a wise safety
precaution. Do not share grooming or tack with other animals.

Perhaps some day there will be prevention for this disease. - Mod.TG

HealthMap/ProMED-mail map
California, United States: <http://healthmap.org/promed/p/4015>
California county map:
<https://geology.com/county-map/california-county-map.gif>]

[See Also:
Equine herpesvirus - North America (23): USA (WA) equine
http://promedmail.org/post/20180617.5860603
Equine herpesvirus - North America (22): USA (ME)
http://promedmail.org/post/20180601.5832085
Equine herpesvirus - North America (21): USA (TX, ND) equine
http://promedmail.org/post/20180531.5831485
Equine herpesvirus - North America (20): USA (VA, ND) equine
http://promedmail.org/post/20180522.5812573
Equine herpesvirus - North America (19): USA (SD, TX, WA) equine
http://promedmail.org/post/20180512.5793912
Equine herpesvirus - North America (18): USA (WY, SD) equine
http://promedmail.org/post/20180507.5787687
Equine herpesvirus - North America (16): USA (CO, WY) equine
http://promedmail.org/post/20180430.5775616
Equine herpesvirus - North America (15): USA (GA, CA, ND) equine
http://promedmail.org/post/20180425.5769112
Equine herpesvirus - North America (14): (CA, CO) equine
http://promedmail.org/post/20180419.5758431
Equine herpesvirus - North America (13): (WA, SD) equine
http://promedmail.org/post/20180414.5746149
Equine herpesvirus - North America (12): USA (NJ, MI) equine
http://promedmail.org/post/20180408.5732655
Equine herpesvirus - North America (11): USA (NJ, VA) equine
http://promedmail.org/post/20180326.5712134
Equine herpesvirus - North America (10): USA (MD, WY, NJ)
http://promedmail.org/post/20180318.5693959
Equine herpesvirus - North America (09): USA (AZ, ID, KY, NY)
http://promedmail.org/post/20180218.5634901
Equine herpesvirus, equine (02): EHV-8, poss. association with
abortion in mares http://promedmail.org/post/20180215.5630695
Equine herpesvirus, equine: EHV-8, poss association with abortion in
mares http://promedmail.org/post/20180212.5622069
Equine herpesvirus - North America (08): USA (OH) equine
http://promedmail.org/post/20180211.5622002
Equine herpesvirus - North America (07): USA (WA, VA, ID, WY, KY)
equine http://promedmail.org/post/20180209.5618528
Equine herpesvirus - North America (06): USA (PA,GA,OR) equine
http://promedmail.org/post/20180201.5598618
Equine herpesvirus - North America (05): USA (NY) equine
http://promedmail.org/post/20180127.5589165
Equine herpesvirus - North America (04): (MD) equine
http://promedmail.org/post/20180126.5585559
Equine herpesvirus - North America (03): USA (PA)
http://promedmail.org/post/20180124.5580197
Equine herpesvirus - North America (02): USA (PA, VA) equine
http://promedmail.org/post/20180121.5572164
Equine herpesvirus - North America: USA (NY) equine
http://promedmail.org/post/20180111.55532842017
2017
----
Equine herpesvirus - North America (15): USA (CA) equine
http://promedmail.org/post/20170505.5014770
Equine herpesvirus - North America (10): USA (CA) equine
http://promedmail.org/post/20170215.4841823]
.................................................sb/tg/mj/jh
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