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. 2017 Jul 1;96(7):2104-2109.
doi: 10.3382/ps/pew499.

Prevalence and drug resistance of avian Eimeria species in broiler chicken farms of Zhejiang province, China

L-H Lan  1 , B-B Sun  1 , B-X-Z Zuo  1 , X-Q Chen  1 , A-F Du  1
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Free article

Prevalence and drug resistance of avian Eimeria species in broiler chicken farms of Zhejiang province, China

L-H Lan et al. Poult Sci. .
Free article

Abstract

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.

Keywords: Eimeria; chicken; drug resistance; prevalence.

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