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HomeHorse BreedingTitle: Equine Herpesvirus Outbreak in Sonoma County: Mare Euthanized, 36 Horses Quarantined On...

Title: Equine Herpesvirus Outbreak in Sonoma County: Mare Euthanized, 36 Horses Quarantined


On June 3, a 23-year-old pony mare in Sonoma County, California, tested positive for equine herpesvirus myeloencephalopathy (EHM) secondary to equine herpesvirus-1 (EHV-1). The mare initially became ataxic on June 1. She was euthanized, and 36 potentially exposed horses on the home premises are under quarantine.

EDCC Health Watch is an Equine Network marketing program that utilizes information from the Equine Disease Communication Center (EDCC) to create and disseminate verified equine disease reports. The EDCC is an independent nonprofit organization that is supported by industry donations in order to provide open access to infectious disease information.

EHV 101

Herpesvirus is highly contagious among horses and can cause a variety of ailments in equids, including rhinopneumonitis (a respiratory disease usually found in young horses), abortion in broodmares, and EHM.

In many horses, the first or only sign of EHV-1 infection is fever, which can go undetected. In addition to fever, other common signs of EHV-1 infection in young horses include cough, decreased appetite, depression, and a nasal discharge. Pregnant mares typically show no signs of infection before they abort, and abortions usually occur late in gestation (around eight months) but can be earlier. Abortions can occur anywhere from two weeks to several months following infection with EHV-1.

Horses with EHM usually have a fever at the onset of the disease and might show signs of a respiratory infection. A few days later, neurologic signs such as ataxia (incoordination), weakness or paralysis of the fore- and hind limbs, urine retention and dribbling, loss of tail tone, and recumbency (inability to rise) develop.

Herpesvirus is easily spread by nose-to-nose or close contact with an infectious horse; sharing contaminated equipment including bits, buckets, and towels; or clothing, hands, or equipment of people who have recently had contact with an infectious horse. Routine biosecurity measures, including hygiene and basic cleaning and disinfection practices, should be in place at all times to help prevent disease spread.

Current EHV-1 vaccines might reduce viral shedding but are not protective against the neurologic form of the disease. Implementing routine biosecurity practices is the best way to minimize viral spread, and the best method of disease control is disease prevention.

On June 3, a 23-year-old pony mare in Sonoma County, California, was euthanized after testing positive for equine herpesvirus myeloencephalopathy (EHM) linked to equine herpesvirus-1 (EHV-1). The mare exhibited ataxia on June 1, prompting quarantine measures for 36 potentially exposed horses on the premises.

Equine herpesvirus is highly contagious and can lead to various health issues in horses, including respiratory diseases, abortions in pregnant mares, and EHM. Initial signs of EHV-1 infection often include fever, which may go unnoticed, along with respiratory symptoms in young horses. Pregnant mares may not show symptoms before experiencing late-term abortions.

EHM typically begins with fever and respiratory signs, followed by neurological symptoms such as incoordination and paralysis. The virus spreads easily through close contact and contaminated equipment, underscoring the importance of routine biosecurity measures to prevent outbreaks. While current vaccines can reduce viral shedding, they do not protect against the neurological form of the disease, making prevention critical.

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Title: "NSW Farmers Face Tough Conditions Amid Natural Disasters and Rising Costs"


The biannual NSW Farmers Business Sentiment Survey revealed 56 per cent of farmers are experiencing deteriorating business conditions in 2025 thanks to natural disasters, input costs, and global trade headwinds.

Insurance was another major concern for farmers, with the number of respondents concerned about accessing insurance jumping by 10 per cent in the last year alone.

“What we’re seeing is the impact of drought on one hand, and floods and severe weather on the other — with both extremes driving those really tough business conditions for farmers in many parts of the state,” NSW Farmers principal economist Samuel Miller said.

As communities grappled with the compound effects of multiple disasters, Mr. Miller said meaningful support for farmers dealing with flood and drought was essential.

Backing Women at AWiA

The agricultural industry is facing some of its toughest seasons yet, from devastating floods and prolonged drought to rising financial and emotional pressures. That’s why Australian Women in Agriculture is calling on individuals, businesses, and community groups to sponsor a place at the 2026 AWiA National Conference in Adelaide, South Australia.

By donating a ticket, you’re giving a woman in agriculture, who otherwise couldn’t attend, the opportunity to connect, learn, and be empowered among peers who understand her journey.

You can donate a ticket online at awia.org.au/conference or if you’d like to donate more than one ticket, email [email protected].

Concerns About Wage Increase

The NFF has acknowledged the Fair Work Commission’s decision to increase the National Minimum Wage and modern award rates by 3.5 per cent.

“Australian farmers continue to face rising input costs, acute workforce shortages, and significant exposure to global market volatility,” NFF chief executive Troy Williams said.

“As price takers, farm businesses have limited capacity to absorb higher labour costs without a corresponding uplift in productivity. Without this link, wage growth risks undermining the viability of many small and family-run farm operations.”

NFF believes the Fair Work Commission must continue to ensure that wage decisions reflect productivity trends and regional conditions to protect rural employment and business sustainability.

Young Farmers Scholarship

Agriculture Minister Ros Spence announced the opening of the 2025 Upskill and Invest Young Farmers Scholarship Program. The program offers scholarships of up to $10,000 for farmers aged 18 to 40, including up to $5,000 for training or study, and another $5,000 to apply those skills on-farm through practical investments.

Applications are now open to young farmers who have been working in a farm business for at least three days a week for the past three months, with a minimum of two years’ total on-farm experience. Applications close at 5pm on Wednesday, July 23.

To apply, visit: vic.gov.au/youngfarmers.

Horse Breeding Worth $1.68b

The Australian thoroughbred breeding industry, the second largest in the world, delivered a solid economic performance in 2022-23, contributing $1.68 billion to the national economy.

The report provides the most comprehensive and up-to-date snapshot of the industry’s impact — equipping breeders and state-based associations with critical data to support long-term planning, funding applications, and policy engagement.

“These results confirm what many of us in the industry already know — thoroughbred breeding is not just thriving, it’s a major economic engine for regional Australia,” Thoroughbred Breeding Australia president Basil Nolan said.

“This research gives us the facts we need to advocate confidently — for funding, infrastructure, and recognition of the vital role breeding plays in Australia’s racing ecosystem and rural prosperity.”

New Website Helps Farmers

A Charles Sturt University-led project strengthens Australian farmers’ cybersecurity management with free web-based resources for Australian producers and producer groups.

The Farmers’ Guide to Cybersecurity consists of evidence-based resource materials developed by a research project team from four Australian universities. The guide’s new website helps farmers understand what they need to know about cybersecurity and what to do to protect their farming businesses.

What’s available online at tinyurl.com/9ua33p4e includes:

  • An interactive ‘jump-in jump-out’, study-at-your-own-pace practical training module about cybersecurity.
  • Downloadable infographics/facts sheets.
  • Video content to raise awareness of the need to address cybersecurity, which can be shared or put on your website.
  • Links to other useful cybersecurity resources.
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