SNAPduo ST Plus Test

Detects more beta-lactam and tetracycline residues including cephalexin at or below established maximum residue limits.

Test cold milk right from the truck, refrigerator or bulk tank
Robust and flexible
Cow, Goat, Sheep, Mare, Buffalo, Camel
Variety of milk types (Normal, UHT, Sterilised, reconstituted milk powder, thawed, skimmed)
Read results after 6–8 minutes
ILVO validated
Lowest rate of false positives

* Availability / Distribution: Worldwide

All IDEXX ST tests are submitted for ILVO validation.

Contact us

Test details

Part numbers and sizes

99-0009837 (30 tests)

Sensitivity Table

Drug	European MRL	SNAPduo ST Plus Detection Level (at or below), ppb
Penicillins
Penicillin G (Benzylpenicillin)	4 ppb	2 ppb
Ampicillin	4 ppb	4 ppb
Amoxicillin	4 ppb	3 ppb
Oxacillin	30 ppb	3 ppb
Cloxacillin	30 ppb	4 ppb
Dicloxacillin	30 ppb	4 ppb
Nafcillin	30 ppb	3 ppb
Cefalosporins
Ceftiofur	100 ppb	8 ppb
Cephapirin	60 ppb^†	30 ppb
Desacetylcephapirin	60 ppb^†	≤60 ppb
Desfuroylceftiofur	100 ppb	25 ppb
Cefquinome	20 ppb	16 ppb
Cefalonium	20 ppb	14 ppb
Cefazolin	50 ppb	20 ppb
Cefacetrile	125 ppb	50 ppb
Cephalexin	100 ppb	30 ppb
Cefoperazone	50 ppb	35 ppb
Cefuroxime	-	8 ppb
Tetracyclines
Tetracycline	100 ppb	16 ppb
Oxytetracycline	100 ppb	18 ppb
Chlortetracycline	100 ppb	40 ppb
Doxycycline	-	25 ppb

^†MRL is established for cephapirin as the sum of cephapirin and desacetylcephapirin

Questions & Answers

About SNAP ST tests

Note: IDEXX SNAP ST tests are not available in the U.S. or Canada.

What is the difference between the SNAP Beta-Lactam ST Plus Test or the SNAPduo ST Plus Test and other IDEXX SNAP tests?

The SNAP Beta-Lactam ST Plus Test and the SNAPduo ST Plus Test contain a proprietary reformulated conjugate pellet that accurately and reliably detects beta-lactam and tetracycline antibiotic residues including cephalexin without heat or incubation, allowing you to test cold milk directly from the truck, refrigerator or bulk tank. The IDEXX SNAP Beta-Lactam ST Plus Test performance has been validated by an independent lab (ILVO).

How long does it take to run a SNAP ST PLus test?

SNAP ST Plus tests are completed in less than 7 minutes.

What happens if I use a heater block?

To achieve optimal results close to the Maximum Residue Limits, using a heater block is not recommended. If a heater block is used by mistake, follow the prescribed protocol to retest the sample without the heater block.

Can tests be returned to the refrigerator if not used that day?

Tests that were taken out of refrigeration to be used during the day may be returned to refrigeration as long as the room temperature during the day did not exceed 30°C.

Must the SNAP device be on a level surface to run properly?

For optimal results, run the test on a flat, level surface.

How should I store my SNAP tests?

Refrigerate all SNAP test materials at 2–8°C (36–46°F). Tests can be kept at 15-30°C (59-86°F) during the day of use. SNAP ST Plus tests may be stored at 15–22°C (59–72°F) for up to 30 days. Check labeling for test-specific instructions. Remove only the number of tests to be used for the day.

Do SNAP tests need to be brought to room temperature before testing?

Yes, the test is designed for use under normal ambient conditions (15–30°C). Remove the number of devices needed for the day from refrigeration and allow them to warm to room temperature for at least 15 minutes before using.
Before you test:

Verify that the SNAP device has coloured spots in the results window and activation circle.
Make sure the pellet is moving freely in the bottom of the sample tube.

How important is the activation time of the SNAP test?

After the reagent pellet has dissolved, pour the entire contents of the sample tube into the sample well of the SNAP device. Remain with the device and watch the sample flow across the results window toward the blue activation circle. When the blue activation circle begins to disappear, press the activator firmly until the device "snaps" and the activator is flush with the body of the SNAP device. Activate (snap) the device when the edge of the circle nearest the sample begins to turn from dark blue to white. Do not let the circle completely disappear.

SNAP technical top - When to "SNAP"

Ordering and shipping

How can I order from IDEXX?

You can place your order with our Customer Service department by calling 00800-727-43399 (Monday through Friday, 8:00 to 18:00 ET). Orders can also be sent via email to dairysnap@idexx.com .

How long will it take to receive my order?

Please contact your local IDEXX customer service for any order.

What if I need to change or cancel an order or have other questions?

In most cases, we process orders the same day we receive them. To ensure we receive any changes as soon as possible, please call one of our customer service representatives at 00800-727-43399 (Monday through Friday, 8:00 to 18:00 ET).

Still have questions?
IDEXX backs all tests with a dedicated team of professionals available to answer your product, regulatory and dairy-industry questions. Call IDEXX Technical Services at 00800-727-43399, Monday through Friday, 8:00 to 17:00 ET. ET; or complete the contact form .