破伤风 in Horses: Lockjaw Prevention
Tetanus is almost always fatal in horses. Vaccination is cheap insurance against this devastating disease.
破伤风是由破伤风梭菌引起的，它会产生一种强效的神经毒素。这种毒素会攻击神经系统，导致僵硬性瘫痪。马是最容易感染的家畜，如果不进行强化治疗，这种疾病几乎总是致命的。通过疫苗接种进行预防简单、廉价且高效。
要点
- Horses are the most susceptible domestic animal to tetanus
- The bacterium enters through wounds, especially deep punctures or necrotic tissue
- Signs include stiffness, muscle spasms, 'sawhorse' stance, and third eyelid prolapse
- Treatment requires antitoxin, antibiotics, muscle relaxants, and intensive nursing
- Even with treatment, mortality rates exceed 75%
- Vaccination with toxoid is highly effective; boosters are needed annually or after wounds
How Tetanus Develops
Clostridium tetani is an anaerobic bacterium found in soil and feces. It enters through wounds — especially deep punctures, lacerations, or areas with dead tissue where oxygen is low. The bacterium isn't invasive; it stays at the wound site and produces tetanospasmin, one of the most potent toxins known. The toxin travels up nerves to the spinal cord and brain, blocking inhibitory neurotransmitters. This causes uncontrolled muscle contraction and spastic paralysis.
Prevention Through Vaccination
Vaccination with tetanus toxoid is highly effective. Primary series: two doses 4-6 weeks apart. Annual boosters maintain immunity. Give a booster at the time of any wound if vaccination status is uncertain. Foals receive primary series starting at 3-4 months. Pregnant mares are vaccinated 4-6 weeks before foaling to pass immunity to the foal via colostrum. Tetanus toxoid is one of the safest and most effective vaccines available.
何时立即去看兽医
- Your horse shows stiffness, muscle spasms, or a sawhorse stance
- The third eyelid is prolapsed across the eye
- The jaw is locked and the horse cannot eat or drink
- There's a recent wound, especially a deep puncture
- The horse is unvaccinated or vaccination status is unknown
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