Does your horse have a natural immunity?

The Test

The Eggzamin kit was designed to make the Fecal Egg Count process quick and easy. Our specialized kits provide everything you need to conduct unlimited McMaster Method Fecal Egg Counts. This common test used by veterinarians and labs all over the world gives you a quantitative (how many?) verses a qualitative (are there eggs?) count of how many parasite eggs are being shed per gram of feces. Our customized equipment and instructions will help you accurately perform the test and identify parasite eggs to make educated deworming protocols.

A Fecal Egg Count (FEC) test uses a microscope to examine parasite eggs in fresh manure. This simple test can indicate which parasites are present and how many are there. Adult parasites lay eggs that are passed through the feces. This is what we are counting.

The Eggzamin Method

Egg Counting Procedures (Quantitative Fecal Analysis)

The most common method of determining Fecal Egg Counts (FEC) is the modified McMaster technique which is used by Eggzamin and many of the leading diagnostic labs around the world and has been the standard for obtaining Fecal Egg Counts in grazing animals for decades. Although there are several variations of how this is done, the basic method uses a weighed fecal sample, a known dilution in the flotation solution, and a specialized counting slide to count the eggs. The principle uses of quantitative FEC’s are to evaluate drug efficacy and potential drug-resistance.

When performing the Eggzamin modified McMaster FEC you are examining 1% of the sample, meaning each egg observed within the grid actually represents 100 eggs in the entire mixture. Since you started with four grams of feces, you must divide this number by four to report the results correctly in eggs per gram – or simply multiply the number of eggs counted by 25.


Here are a few of the labs utilizing the the modified McMaster technique:

IDEXX, Auburn University, University of California, Davis, Texas A&M University at College Station, Penn Veterinary Medicine – PADLS laboratories, Texas Veterinary Medical Diagnostic Laboratory, Kansas State Veterinary Diagnostic Laboratory, University of Florida Veterinary Diagnostic Laboratories, Iowa State University College of Veterinary Medicine, North Carolina Veterinary Diagnostic Laboratory System.


We’ve made it easy – learn how to conduct a Fecal Egg Count with Eggzamin.

Testing Checklist:
  • You have your Eggzamin kit
  • Your flotation solution in your kit is prepared
  • You are familiar with your microscope
  • You have a fresh manure sample
  • You have a workspace and a paper towel handy
  • You are ready to test!

“I never felt right treating something I couldn’t see, and I always suspected my horses didn’t need to be wormed as often as recommended. Now I have my own FEC lab and Eggzamin has helped me learn to do the test and  identify parasites. I can test my horses to determine if they need treatment, and I am finding that they need it much less frequently!”   

~ Lee Posey, Oregon

“Clearly, analyzing fecal samples is now the foundation for evidence-based equine parasite control.”  

Nielsen et al., 2010 Veterinary Parasitology

“To make this easy, a new company has recently developed a FEC kit that contains a good quality inexpensive microscope, all the supplies that are needed, and instructions.  The company is Eggzamin I have actually purchased a microscope from them for my own lab and have been very impressed with it.”

~ Dr. Ray Kaplan, DVM, PhD.

“Although the price of a dewormer syringe is considerably lower than the cost of a fecal analysis, regular monitoring ultimately will save money, and more importantly, preserve anthelmintic efficacy.”

~ Dr. Craig R. Reinemeyer, DVM, PhD.

Understanding the life-cycle of small strongyles is the first step to intervention. By combining good pasture management with a strategic deworming program, small strongyles can be controlled effectively. Remember that “control” is the key word, rather than elimination.

The majority of surveyed farms have drug-resistant parasites. Does yours?