🚧 Sensitivity Delvotest® T for cow milk // plates

Detection limits for Delvotest® T plates in cow milk

The table presented below is an indicative list of the sensitivity of the Delvotest® T 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 test, perform one additional test with negative control milk, when the test containing the negative control milk turns yellow read the test result of the other milk. The sensitivity of the test when using a fixed reading incubation time (3hr15) can be decreased.

Delvotest® T is not sensitive to quinolones. Quinolones & fluoroquinolones can only be detected at levels much higher than EU MRLs.

		Maximum Residue Limits (MRL) for bovine milk (ppb)				Delvotest® T Plates 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	10
	Nafcillin	30	*	*	*	3
	Oxacillin	30	*	*	*	3
	Penicillin G	4	5	4	*	1
Tetracyclines	Chlortetracycline	100	300	100	100	150
	Doxycycline	*	*	*	*	50
	Oxytetracycline	100	300	100	100	80
	Tetracycline	100	300	100	100	100
Sulfonamides	Sulfadiazine	100	10	*	10	50
	Sulfadimethoxine	100	10	*	*	40
	Sulfadoxine	100	*	*	*	80
	Sulfamethazine	100	10	25	25	125
	Sulfathiazole	100	10	*	10	30
Cephalosporins	Cefalexin	100	*	*	*	30
	Cefalonium	20	*	*	*	5
	Cefazolin	50	*	*	*	3
	Cefoperazone	50	*	*	*	20
	Cefquinome	20	*	*	10	60
	Ceftiofur	100	100	100	100	20
	Cephapirin	60	20	*	10	5
	Desacelylcephapirin	60	*	*	*	2
	Desfuroylceftiofur	100	100	100	*	80
Macrolides	Erythromycin A	40	50	*	*	200
	Spiramycin	200	*	200	*	2000
	Tilmicosin	50	*	*	*	100
	Tylosin A	50	50	100	*	35
Aminoglycosides	DH Streptomycin	200	125	200	20	800
	Gentamycin	100	30	200	*	100
	Neomycin B	1500	150	1500	1500	140
	Streptomycin	200	*	200	20	1000
Others	Chloramphenicol	*	*	0	*	3500
	Clavulanic Acid	200	*	*	*	800
	Dapsone	*	*	*	*	10
	Lincomycin	150	*	150	150	220
	Pirlimycin	100	400	100	*	300
	Rifaximin	60	*	*	*	40
	Trimethoprim	50	*	*	10	120

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

** CCꞵ detection capability is the lowest concentration where a substance can be detected with 95% probability.

Delvotest® T sensitivity listed as CCβ as determined (according to European legislation) by AFNOR validation study 2020-2021.

Legislation regulation references

EU-MRL EC 37/2010

USA S/TL FDA M-I-18-9 2018

CODEX CX/MRL 2-2018

FSSAI Compedium_Contaminants_Regulation_20_08_2020

SAQs:

What is the sensitivity of T plates?
What antibiotics do T plates detect?
Can Delvotest® T detect fluoroquinolones (antibiotic) in milk?