Efficacy of Cygro? 10G (maduramicin ammonium‐α) for turkeys

coccidiostats and histomonostats, Cygro? 10G, maduramicin ammonium‐α, turkeys, efficacy
First published in the EFSA Journal
21 April 2020
19 March 2020
Scientific Opinion


Following a request from the European Commission, the Panel on Additives and Products or Substances used in Animal Feed (FEEDAP) was asked to deliver a scientific opinion on the efficacy of Cygro? 10G. The active substance of Cygro? 10G is the polyether ionophore maduramicin ammonium‐α, a coccidiostat intended to be used in feed for turkeys for fattening. In a former opinion, the FEEDAP Panel concluded that the efficacy of Cygro? 10G in turkeys for fattening had not been sufficiently demonstrated. In the present submission, new efficacy studies have been provided by the applicant. A positive effect of Cygro? 10G in preventing coccidiosis in turkeys was shown in three anticoccidial sensitivity tests (ASTs). However, owing to the lack of floor pen studies showing a positive effect, the FEEDAP Panel is not in the position to conclude on the efficacy of Cygro? 10G for turkeys for fattening.

Maduramicin ammonium
Cas: 84878-61-5
Inchi: InChI=1S/C47H80O17.H3N/c1-23-18-24(2)45(9,51)61-36(23)31-19-32(58-35-20-30(53-10)40(55-12)28(6)57-35)42(59-31)44(8)15-14-33(60-44)43(7)16-17-46(64-43)21-29(48)25(3)37(62-46)26(4)38-41(56-13)39(54-11)27(5)47(52,63-38)22-34(49)50;/h23-33,35-42,48,51-52H,14-22H2,1-13H3,(H,49,50);1H3/t23-,24+,25+,26+,27-,28-,29-,30-,31+,32-,33+,35?,36-,37-,38-,39-,40-,41-,42+,43-,44-,45-,46+,47+;/m0./s1
Iupac: azane; 2-[(2R,3S,4S,5R,6S)-6-[(1R)-1-[(2S,5R,7S,8R,9S)-2-[(2R,5S)-5-[(2R,3S,5R)-3-[(2R,4S,5S,6S)-4,5-dimethoxy-6-methyloxan-2-yl]oxy-5-[(2S,3S,5R,6S)-6-hydroxy-3,5,6-trimethyloxan-2-yl]oxolan-2-yl]-5-methyloxolan-2-yl]-9-hydroxy-2,8-dimethyl-1,6-dioxaspiro[4.5]decan-7-yl]ethyl]-2-hydroxy-4,5-dimethoxy-3-methyloxan-2-yl]acetic acid
Panel on Additives and Products or Substances used in Animal Feed
feedap [at] efsa.europa.eu
EFSA Journal 2020;18(4):6079
Question Number
On request from
European Commission