How often should fecal egg counts be performed on horses?

Fecal egg counts (FECs) are a crucial part of effective parasite management in horses. They should typically be performed every 6 to 12 weeks, depending on the horse’s individual needs and environmental factors.

What Are Fecal Egg Counts and Why Are They Important?

Fecal egg counts measure the number of parasite eggs in a horse’s manure. This test helps determine the level of parasite infestation and the effectiveness of deworming programs. Regular FECs are essential because they:

• Identify high shedders: Horses with high egg counts may require more frequent deworming.
• Evaluate dewormer efficacy: Post-treatment FECs assess whether the dewormer effectively reduced parasite levels.
• Prevent resistance: Overuse of dewormers can lead to resistance; FECs ensure treatments are necessary.

How Often Should You Perform Fecal Egg Counts?

The frequency of FECs depends on several factors, including the horse’s age, health, and environment. Here are some general guidelines:

• Adult Horses: Perform FECs every 6 to 12 weeks. Adjust frequency based on individual results and environmental conditions.
• Young Horses (under 3 years): Monitor more frequently, as they are more susceptible to parasites.
• High Shedders: Horses with consistently high FEC results may need testing every 4 to 6 weeks.

Factors Influencing FEC Frequency

Several factors influence how often you should conduct FECs:

1. Geographical Location: Areas with warm, humid climates may require more frequent testing due to higher parasite loads.
2. Pasture Management: Horses on well-managed pastures with rotational grazing may need less frequent FECs.
3. Herd Size: Larger herds may increase the risk of parasite transmission, necessitating more frequent FECs.

How to Perform a Fecal Egg Count

Performing a fecal egg count involves collecting a fresh manure sample and sending it to a laboratory for analysis. Here’s a step-by-step guide:

1. Collect Sample: Use a clean container to collect a small amount of fresh manure.
2. Label and Store: Label the container with the horse’s name and date. Keep it cool until you can send it to the lab.
3. Submit to Lab: Send the sample to a veterinary lab for analysis.

Understanding Fecal Egg Count Results

FEC results are typically expressed in eggs per gram (EPG) of manure. Here’s how to interpret the results:

• Low Shedders: Less than 200 EPG
• Moderate Shedders: 200-500 EPG
• High Shedders: More than 500 EPG

Adjusting Deworming Programs Based on Results

• Low Shedders: May require less frequent deworming.
• Moderate Shedders: Monitor closely and adjust deworming as needed.
• High Shedders: Consider more frequent deworming and FECs.

Common Parasites Detected by Fecal Egg Counts

FECs primarily detect strongyle eggs, but they can also reveal other parasites:

• Large Strongyles: Once common, but now less prevalent due to effective dewormers.
• Small Strongyles: The most common parasite in adult horses.
• Ascarids (Roundworms): Primarily affect young horses.

People Also Ask

How Do Fecal Egg Counts Help Prevent Dewormer Resistance?

By identifying horses that need treatment and those that don’t, FECs help reduce unnecessary dewormer use, slowing the development of resistance.

Can Fecal Egg Counts Detect All Types of Parasites?

No, FECs primarily detect strongyle eggs and ascarids. They may not identify tapeworms or other parasites, which require different tests.

What Should I Do If My Horse Has a High Fecal Egg Count?

Consult with a veterinarian to adjust your deworming program. They may recommend a different dewormer or increased frequency of treatments.

Are Fecal Egg Counts Expensive?

FECs are relatively affordable, typically costing between $10 and $30 per test, making them a cost-effective tool for managing equine parasites.

How Soon After Deworming Should I Perform a Fecal Egg Count?

Conduct a FEC 10 to 14 days post-treatment to evaluate the dewormer’s effectiveness.

Conclusion

Regular fecal egg counts are integral to maintaining your horse’s health and preventing parasite resistance. By tailoring your deworming program based on FEC results, you can ensure effective parasite control while minimizing the risk of resistance. For more information on equine health, consider exploring topics such as pasture management and nutrition.