NAHMS Internal Parasite Report Example

National Animal Health Monitoring System
(NAHMS) Internal Parasite Report
Date of report: 11/1/2019
Parasite test results for NAHMS ID: 99999
Dear Participant,
Thank you for participating in the parasite portion of the NAHMS Goat 2019 Study. This report
contains the results of the internal parasite testing performed on the goats at your operation.
Consider sharing these results with your veterinarian so that they can assist you in determining
if you a need to modify your deworming protocols.
If you have questions about the accuracy of your results, please contact Dr. Alyson Wiedenheft,
the NAHMS biologics coordinator, at (970) 494-7290 or Alyson.M.Wiedenheft@aphis.usda.gov.

Overview of Parasite Testing:

Control of internal parasite infection in goats is considered an essential aspect of routine
management. Internal parasite control is based both on good husbandry and the use of
anthelmintics. The first step in an effective deworming program is to determine the level of
infection and the type of internal parasites on the goat operation. Trichostrongyles (a family of
stomach worms, including Haemonchus contortus- the “Barber Pole Worm”) are considered the
most important internal parasites in goats industry. Specifically, Haemonchus contortus
infections are especially dangerous to goats.

Fecal Egg Count (FEC), Egg Culture, and Interpretation:

These results describe a baseline (pre-deworming) and post-treatment (post-deworming) fecal
egg count (FEC) for trichostrongyles reported as eggs per gram (EPG) at the animal level. An
FEC is calculated for each individual animal, and is used to estimate the parasitic load. For this
study, a low FEC is considered to be less than 300 EPG, a moderate FEC is between 300-1000
EPG, and a high FEC is greater than 1000 EPG. The pre-deworming samples were also
cultured to differentiate the trichostrongyles eggs.

Fecal Egg Count Reduction Test (FECRT) and Interpretation:

A reliable method for determining the efficacy of anthelmintics on internal worm parasites in
goats is the fecal egg count reduction test (FECRT). The FECRT given in this report is
calculated at the operation level by comparing the average of all the goats on the operation with
a moderate or high pre-deworming FEC and with their average post-deworming FEC. The
calculated FECRT percentage reflects the effectiveness of the dewormer used at your
operation.

TRICHOSTRONGYLE RESULTS:
Individual Goats Results:
Sample
#

Goat
name/ID

Baseline FEC
(EPG)

1

Patty

0

2

Alice

5

3

Jackie

1000

4

Willa

2490

5

Jane

1435

6

Bonnie

5

7

Samantha

8

Baseline Culture
NA

Post treatment
FEC (EPG)
0

0

Haemonchus
contortus
Haemonchus
contortus
Haemonchus
contortus
Haemonchus
contortus
Haemonchus
contortus
NA

0

Cammie

0

NA

0

9

Jill

0

10

Suzy

5

11

Mel

2004

12

Jasper

0

13

Katie

1035

14

Fannie

5

15

Helen

16

NA

Haemonchus
contortus
NA
NA

0
0
0
0
0

0
0
0
0

0

Haemonchus
contortus
Haemonchus
contortus
NA

0

Lemon

0

NA

0

17

Rascal

0

NA

0

18

Trisha

5

19

Vicki

10

20

Wendy

0

Haemonchus
contortus
Haemonchus
contortus
NA

21

Apple

0

NA

0
0

0
0
0
0

Dewormer
used
Ivermectin
Paste 1.87%
Ivermectin
Paste 1.87%
Ivermectin
Paste 1.87%
Ivermectin
Paste 1.87%
Ivermectin
Paste 1.87%
Ivermectin
Paste 1.87%
Ivermectin
Paste 1.87%
Ivermectin
Paste 1.87%
Ivermectin
Paste 1.87%
Ivermectin
Paste 1.87%
Ivermectin
Paste 1.87%
Ivermectin
Paste 1.87%
Ivermectin
Paste 1.87%
Ivermectin
Paste 1.87%
Ivermectin
Paste 1.87%
Ivermectin
Paste 1.87%
Ivermectin
Paste 1.87%
Ivermectin
Paste 1.87%
Ivermectin
Paste 1.87%
Ivermectin
Paste 1.87%
Ivermectin
Paste 1.87%

Operation Results:

Pre- and post-deworming FEC results were used to calculate your operation level FECRT
percentage.
Trichostrongyles FECRT: 100%
FECRT Interpretation (EFFECTIVE(>95%)): Deworming using the product listed was
effective in reducing trichostrongyles egg counts based on fecal egg count reduction test
results across all the tested goats from which samples were submitted.
FECRT Interpretation (SUSPECT (85-95%)): Deworming using the product listed was
suspect ineffective in reducing trichostrongyles egg counts based on fecal egg count
reduction test results across all the tested goats from which samples were submitted.
Lowered efficacy of the deworming procedure could be due to under dosing, failure of the
goat to consume the dose of dewormer given, inadequate storage conditions of product,
expiration of product or due to resistance of the trichostrongyles on your operation to the
product used. You may want to share these results with your veterinarian so they can advise
you on deworming protocols for your goat.
FECRT Interpretation (INEFFECTIVE (>85%)): Deworming using the product listed was
ineffective in reducing trichostrongyles egg counts based on fecal egg count reduction test
results across all the tested goats from which samples were submitted. Lowered efficacy of
the deworming procedure could be due to under dosing, failure of the goat to consume the
dose of dewormer given, inadequate storage conditions of product, expiration of product or
due to resistance of the trichostrongyles on your operation to the product used. You may
want to share these results with your veterinarian so they can advise you on deworming
protocols for your goat.
FECRT Interpretation (Inconclusive): Because the pre-deworming fecal egg counts were
very low on all/most of the goats from which samples were submitted, the efficacy of the
current product used could not be calculated. In order to calculate a reliable fecal egg
reduction test result, the pre-deworming egg count on at least several of the goats needs to
be above 300 eggs per gram.
FECRT Interpretation (Inconclusive): Because several different deworming products were
used on the sampled goats, we were unable to determine the effectiveness of each product
used. Testing using the Fecal Egg Count Reduction Test (FECRT) using a similar product
on all tested goats in the future may allow for interpretation of the efficacy of the product
used.