🚧 Sensitivity Delvotest® SP NT for cow milk // ampoules

Detection limits for Delvotest® SPNT ampoules in cow milk

The table presented below is an indicative list of the sensitivity of the Delvotest® SPNT at control time for the most used antibiotics in the world. This list is not exhaustive. The test is sensitive to many more antibiotic drugs and sulfonamides. Values presented in this list are ppb (parts per billion) equaling μg/Kg or ng/gram.

The best sensitivity is reached when using control time (CT). To test at control time, additionally to the milk you would like to sample, perform one additional test with negative control milk, when the test containing the negative control milk turns yellow, read the test result of the sample milk. The sensitivity of the test when reading at fixed incubation time (3h for cow milk) can be decreased.

		Maximum Residue Limits (MRL) for bovine milk (ppb)				*Delvotest® SPNT ampoules CCß ppb**
Antibiotic class	Antibiotic	EU	USA S/TL	CODEX	India FSSAI	Cow milk
Penicillins	Amoxicillin	4	10	4	*	2
	Ampicillin	4	10	*	10	2
	Cloxacillin	30	10	*	10	12
	Oxacillin	30	*	*	*	4
	Penicillin G	4	5	4	*	2
Tetracyclines	Chlortetracycline	100	300	100	100	300
	Doxycycline	*	*	*	*	150
	Oxytetracycline	100	300	100	100	300
	Tetracycline	100	300	100	100	300
Sulfonamides	Sulfadiazine	100	10	*	10	65
	Sulfadimethoxine	100	10	*	*	50
	Sulfamethazine	100	10	25	25	75
	Sulfathiazole	100	10	*	10	40
Cephalosporins	Cefalexin	100	*	*	*	45
	Cefoperazone	50	*	*	*	30
	Cefquinome	20	*	*	10	65
	Ceftiofur (pur)*	100	100	100	100	20
	Cephapirin	60	20	*	10	2
Macrolides	Erythromycin A	40	50	*	*	90
	Tilmicosin	50	*	*	*	30
	Tylosin A	50	50	100	*	35
Aminoglycosides	DH Streptomycin	200	125	200	20***	700
	Gentamycin	100	30	200	*	90
	Kanamycin	150	*	*	*	1700
	Neomycin B	1500	150	1500	1500	115
	Spectinomycin	200	*	200	*	2000
Others	Chloramphenicol	*	*	0	*	3000
	Dapsone	*	*	*	*	2
	Lincomycin	150	*	150	150	170
	Rifaximin	60	*	*	*	50
	Trimethoprim	50	*	*	10	160

* not listed, legislation regulation normally restricts the use: not to be used for lactating animals.

**CCß (detection capability) is the lowest concentration where substance can be detected 95% of the time.

***Ceftiofur with metabolites has a detection limit about 4 times higher.

**** for cattle 20ppb, for sheep milk 200ppb

Data based on internal and external studies collected June 2017.

SAQs:

What is the sensitivity of SPNT ampoules?
What antibiotics do SPNT ampoules detect?