Evaluation of ionophore sensitivity of Eimeria acervulina and Eimeria maxima isolated from the Algerian to Jijel province poultry farms.
The present study represents the first description of ionophore resistance in recovered from commercial Algerian (Jijel-Algeria) broiler farms. Microscopy and intervening transcribed sequence 1 PCR (ITS1 PCR) revealed only 2 Eimeria species present in litter from these farms- namely Eimeria acervulina and Eimeria maxima. A pool of these isolates were evaluated in broiler chickens (Cobb 500) for sensitivity to 5 anticoccidial compounds-diclazuril (1ppm), lasalocid (125ppm), monensin (125ppm), narasin (70ppm) and salinomycin (60ppm). As indicated by anticoccidial sensitivity profiles based on lesion scores and anticoccidial index (ACI), complete resistance to monensin and narasin, partial resistance to salinomycin and lasalocid, and complete sensitivity to diclazuril was observed. While lack of sensitivity to monensin is not surprising given its use for years as the sole anticoccidial compound, the resistance to monoether (narasin) and polyether (lasalocid) ionophores suggests that cross-resistance has developed in a segment of the Eimeria population. The fairly uniform Eimeria species composition among all poultry farms suggests that E. acervulina and E. maxima more rapidly develop resistance to ionophore drugs.
Laboratory, P.A.D.E.S.C.A, University of Constantine, Algeria. Electronic address: djemaiamersamir@gmail.com.
Samir
S
Djemai
Laboratory, P.A.D.E.S.C.A, University of Constantine, Algeria.
Abdeslam
A
Mekroud
Animal Parasitic Diseases Laboratory, Beltsville Agricultural Research Center, ARS, USDA, Beltsville, MD 20705, USA. Electronic address: mark.jenkins@ars.usda.gov.
Mark C
MC
Jenkins
D000462:Algeria; D000818:Animals; D003048:Coccidiosis / Q000469:parasitology / Q000662:veterinary*; D003049:Coccidiostats / Q000494:pharmacology*; D004351:Drug Resistance; D004539:Eimeria / Q000187:drug effects* / Q000302:isolation & purification; D007476:Ionophores / Q000494:pharmacology; D021261:Parasitic Sensitivity Tests; D011200:Poultry; D011201:Poultry Diseases / Q000469:parasitology*
D003049:Coccidiostats; D007476:Ionophores
Anticoccidial index; Eimeria; Internal transcribed spacer 1 PCR; Ionophore