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

Lan, Lei; Sun, Bingbing; Zuo, Baoxia; Chen, X.-Q.; Du, Aifang

doi:10.3382/ps/pew499

Cited by 54 publications

(37 citation statements)

References 23 publications

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“…are evidently spread worldwide [ 17 ]. Eimeria species have been found with different prevalence during regional surveys in France [ 18 ], Jordan [ 19 ], Romania [ 20 ], Brazil [ 21 ], or China [ 22 ]. Our findings are in agreement with previous reports that show E. tenella as the predominant species found in Asia [ 23 , 24 ].…”

Section: Resultsmentioning

confidence: 99%

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Chicken Coccidiosis in Central Java, Indonesia: A Recent Update

Hamid

Kristianingrum

Wardhana

et al. 2018

Veterinary Medicine International

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Avian coccidiosis is a huge problem worldwide. Heavily infected animals that show severe clinical signs and coccidiostat resistance are causing important economic losses. The present study aimed to update the recent cases of coccidiosis in Central Java, Indonesia, and to show the importance of the disease in the region. A total of 699 samples were obtained from different chicken breed. Different Eimeria species were detected in 175 individuals (25.04%). Three different groups of chicken breed were considered: local chicken (autochthonous chickens of Sentul and Jawa), commercial broiler, and layer. Broiler chickens showed the highest prevalence of infection (34%), followed by layer (26.26%) and local chickens (10.45%). Mild to severe clinical signs of avian coccidiosis were observed in 42% of the infected animals, while 58% of the infected animals showed no clinical signs other than low feed conversion rates. Seven different Eimeria species were identified: E. tenella was the most prevalent (43.3%), followed by E. maxima (26.3%), E. necatrix (15.7%), E. acervulina (8%), E. praecox (3.1%), E. mitis (2.2%), and E. brunetti (1.3%). Coinfections with several Eimeria species were diagnosed. With this study we found massive usage of coccidiostat in the region even though its usage cannot guarantee coccidiosis-free chicken production.

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Section: Resultsmentioning

confidence: 99%

“…This incidence may reflect a case of coccidiostat resistance in the field. Nowadays, avian eimeriosis resistance to various commercial anticoccidial drugs is reported and reviewed worldwide [ 22 , 28 – 30 ]. This might be a concern since no scientific reports are published in Indonesia so far.…”

Section: Resultsmentioning

confidence: 99%

Chicken Coccidiosis in Central Java, Indonesia: A Recent Update

Hamid

Kristianingrum

Wardhana

et al. 2018

Veterinary Medicine International

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“…Anticoccidial resistance (ACR) is a widely recognised problem in poultry production ( Chapman, 1997 ; Stephan et al, 1997 ; Chapman and Jeffers, 2014 ; Lan et al, 2017 ), and has been reported for monensin, salinomycin, nicarbazin, halofuginone, robenidine, toltrazuril and diclazuril ( McDougald, 1981 ; Chapman, 1997 ; Stephan et al, 1997 ). ACR in poultry production is generally considered to be the result of intensive use of anticoccidials, which has led to loss of sensitivity to these drugs ( Peek and Landman, 2011 ).…”

Section: Introductionmentioning

confidence: 99%

Field evaluation of anticoccidial efficacy: A novel approach demonstrates reduced efficacy of toltrazuril against ovine Eimeria spp. in Norway

Odden

Denwood

Stuen

et al. 2018

International Journal for Parasitology: Drugs and Drug Resistan

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Ovine Eimeria spp. infections cause reduced welfare, increased mortality, and substantial economic losses, and anticoccidials are crucial for their control. Recent reports of toltrazuril resistance in pigs, and anecdotal reports of reduced anticoccidial efficacy in lambs, necessitate evaluation of anticoccidial efficacy. Due to the substantial lifecycle differences between nematodes and coccidia, current WAAVP methods for assessing anthelmintic efficacy are not suitable for such evaluations. Faecal samples were collected from 8 pairs of twin lambs from 36 Norwegian sheep farms 6–8 days after turnout. One twin of each pair was then treated with 20 mg/kg toltrazuril and a second faecal sample from all lambs was collected 7–11 days later. Oocyst excretion rate in all samples was determined using McMasters. Suitability of treatment timing was investigated by evaluating the increase in mean log oocyst excretion in untreated lambs. Based on comparisons between groups, a threshold of ≥0.75 (13 farms) was used to identify farms where drug efficacy could be assessed with confidence, drug efficacy on farms with increases of ≥0.5 but <0.75 (7 farms) were evaluated with caution, and drug efficacy on farms with increases of <0.5 (16 farms) was not estimated. Reduction in oocyst excretion between samples from treated lambs compared with controls from the 20 farms with a threshold of ≥0.5 were then analysed using a generalised linear mixed model. The results were classified based on 95% CI obtained using parametric bootstrapping. Among these 20 farms, two exhibited reduced drug efficacy (upper 95% CI < 95%), 13 had good efficacy (lower 95% CI > 90%), and for 5 the results were inconclusive. This is the first evidence-based report of reduced anticoccidial efficacy in ovine Eimeria spp. Additionally, we highlight the problem of sub-optimal timing of treatment (16/36 farms), which could potentially result in incorrect conclusions being reached regarding lack of drug efficacy.

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“…Monensin has been used for the treatment of renal coccidiosis, but is toxic in turkey and guinea fowl. 16 Reports on resistance of Eimeria isolates to anticoccidial drugs are increasing, [61][62][63][64] and rotation of anticoccidial drugs is recommended to minimize the risk of resistance. Natural products, such as cider vinegar, are also emerging as alternative strategies to control avian coccidiosis.…”

Section: Parasitic Nephritismentioning

confidence: 99%