Prevalence and drug resistance of avian Eimeria species in broiler chicken farms of Zhejiang province, China.
In this study, coccidia were isolated and identified from 5 main poultry farms located in Zhejiang province, eastern China. The overall prevalence of Eimeria spp. was 30.7% (95 of 310). Five common species were observed: E. tenella, E. acervulina, E. maxima, E. necatrix, and E. mitis. Two isolates (HZ and QZ) were tested for sensitivity to 8 anticoccidial drugs using 4 indexes including anticoccidial index (ACI), percent of optimum anticoccidial activity (POAA), reduction of lesion scores (RLS), and relative oocyst production (ROP): sulfachloropyrazine, toltrazuril, diclazuril, sulfamonomethoxine/trimethoprim, and amprolium; sulfaquinoxaline/sulfadimethoxine, nicarbazin, and halofuginone. The results showed that the 2 isolates have developed various degrees of resistance to most of the tested drugs. The multi-resistance coccidia are a potential threat to local poultry farming. Rotation of anticoccidial drugs and shuttle programs are recommended to prevent further economic losses caused by coccidiosis.
Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, Institute of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, 310058, China.
L-H
LH
Lan
Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, Institute of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, 310058, China.
B-B
BB
Sun
Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, Institute of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, 310058, China.
B-X-Z
BX
Zuo
Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, Institute of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, 310058, China.
X-Q
XQ
Chen
Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, Institute of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, 310058, China.
A-F
AF
Du
D000818:Animals; D002645:Chickens; D002681:China / Q000453:epidemiology; D003048:Coccidiosis / Q000188:drug therapy / Q000453:epidemiology / Q000469:parasitology / Q000662:veterinary*; D003049:Coccidiostats / Q000494:pharmacology*; D004351:Drug Resistance; D004539:Eimeria / Q000187:drug effects*; D011201:Poultry Diseases / Q000188:drug therapy* / Q000453:epidemiology* / Q000469:parasitology; D015995:Prevalence; D011897:Random Allocation
D003049:Coccidiostats
Eimeria; chicken; drug resistance; prevalence