In South Africa, where our horses face a variety of environmental challenges and infectious diseases, vaccinations are important for safeguarding equine health and ensuring the welfare of individual horses and entire herds. Understanding vaccines and vaccination protocols are important to be able to make the most informed decisions for your horses health.
Although most vaccine protocols dictate the same vaccine within the same time intervals for every horse – it is important to consider age, health and exposure risk. Over vaccination can stress the immune system and trigger chronic inflammation.
Are Vaccinations Important?
Vaccinations stimulate the horse’s immune system to produce a protective response against specific diseases. This protection either prevents infection altogether or significantly reduces the severity and spread of illness. In a country like South Africa, where certain diseases are more prevalent due to climate and insect-borne vectors, vaccination is required to reduce fatalities and outbreaks.
Practically speaking vaccinating doesn’t just protect individual horses – it helps build herd immunity. This is especially important in environments where high risk horses are in close proximity to others. Unvaccinated horses increase the risk of spreading preventable high risk diseases that can be fatal or cause long-term damage.
The administration of vaccinations does however require an approach of moderation to ensure that health is maintained, and that any long-term side effects do not lead to compromised health and mortality. First and foremost, an important factor to keep in mind is that over all an uncompromised immune system is necessary for the prevention of diseases.
What are the Side Effects?
Vaccines although widely believed to be safe, can cause mild to more severe reactions – usually appearing within 72 hours while other side effects can manifest weeks later as delayed immune responses.
- Swelling or soreness at the injection site
- Fever or lethargy for a day or two
- Allergic reactions (anaphylaxis)
- Over vaccination can contribute to laminitis, colic, nuerological symptoms, autoimmune issues and organ stress
- Delayed immune responses, including melanoma growth, muscle wastage and chronic fatigue
Always monitor your horse after vaccination and contact your vet if any unusual symptoms arise. Vaccination should always be part of a broader preventative care strategy designed in considereation of the horses long term health. Record Keeping of vaccinations is essential to ensure the most informed vaccine choices at any time – based on previous health and vaccination history.
Never vaccinate an ill or immune compromised horse especially those with:
- Chronic issues such as Heaves, Cushings, Laminitis, IBS or Metabolic Syndrome
- Fever, infection, skin diseases, allergies, eye or gut inflammation
By keeping yourself informed, you ensure that your vaccination program is effective, legal, and tailored to your horse’s needs.
Preventative Care and Recovery
- The standard recommendation after vaccination is to minimize strenuous exercise for 24-48 hours to reduce the risk of adverse reactions
- The best way to support your horse’s overall health and natural waste elimination processes is to provide a balanced diet, constant access to clean water and a low-stress environment
- Avoid de-wormers with vaccinations
- Herbal supplementation can support the bodies detox and recovery process before and after vaccination
Vaccinate Mindfully
South Africa’s unique climate and disease profile require horse owners to be especially proactive and thus the right vaccine protocol can prevent suffering and the spread of disease. However, vaccinating your horse should never be just about compliance – making informed decisions for your horse based on individual needs is vital for their health and wellbeing. Base your vaccination decisions on risk and health and not the calendar. Your horse will thank you for it with a longer, healthier life.
Core Vaccines for Horses in South Africa
1. African Horse Sickness (AHS)
- Frequency: Annual (usually administered in two doses a few weeks apart)
- Why it’s critical: AHS is endemic to South Africa and can be fatal. It’s a viral disease spread by midges. Vaccination is mandatory in many regions, particularly during the high-risk summer season. The AHS vaccine is only available through Onderstepoort Biological Products (OBP) and must be administered under specific regulations.
2. Tetanus
- Frequency: Every 1-3 years (after the initial booster series)
- Why it’s critical: Tetanus can occur after wounds, surgeries, or even hoof abscesses. It’s nearly always fatal if untreated.
3. Equine Influenza
- Frequency: Every 6–12 months depending on exposure risk (especially important for traveling or competition horses)
- Why it’s critical: Equine influenza is highly contagious and can result in severe respiratory illness
4. Equine Herpesvirus (EHV-1 & EHV-4)
- Frequency: Every 6 months for high-risk horses (youngsters, breeding mares, performance horses)
- Why it’s critical: EHV can cause respiratory disease, abortion in pregnant mares, and neurological issues. It spreads easily in stables and training facilities.
Optional or Risk-Based Vaccines
In addition to the core vaccinations, some horses may require additional vaccines depending on their risk profile, location, or activity.
1. Rabies
- Frequency: Annually
- Why it’s important: Although rare in horses, rabies is fatal and transmissible to humans. It’s recommended in high-risk areas or for horses frequently exposed to wildlife.
2. Strangles (Streptococcus equi)
- Frequency: Annually or as advised
- Why it’s important: Strangles is a highly contagious bacterial infection that causes abscesses in the lymph nodes. It spreads rapidly in crowded stables or yards.