Implementation of a targeted treatment strategy for the sustainable control of Ascaridia galli infections in laying hens.

IF 1.3 Q2 VETERINARY SCIENCES
Behdad Tarbiat, Désirée Seger Jansson, Johan Höglund
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引用次数: 2

Abstract

Background: Ascaridia galli is a widespread problem in cage-free egg production. Sustainable control of nematode infections is a key component in this sector. This study investigates the effect of a treatment strategy against A. galli, aiming to propose a guideline for anthelmintic use on commercial poultry farms.

Methods: A total of eight flocks of laying hens (a-h) from five commercial poultry farms were included in this study. Faecal samples were collected on a biweekly basis starting at 7-13 weeks post-placement (WPP) and processed using the McMaster method to calculate ascarid egg shedding. Flocks were treated after the threshold of 200 eggs per gram of faeces (EPG) was reached.

Results: The highest initial faecal egg count was 6700 EPG at 11 WPP, whereas the lowest was 50 at 8 WPP. The longest delay to detect A. galli was 7 weeks. The lowest and the highest number of treatments were four and six, respectively. The shortest and longest periods between any two treatments were 5 and 22 weeks, respectively.

Conclusions: These results suggest that monitoring for A. galli should start at approximately 7 WPP and should be repeated every 8 weeks until hens are 50 weeks old. Treatment should be given only if moderate to high faecal egg counts are observed. Treatments after this point may be repeated every 8 weeks without eventually performing a faecal test. These findings provide practical support to veterinarians and egg producers dealing with ascarid worm infection in laying hens in their production stage.

Abstract Image

Abstract Image

实施有针对性的治疗策略以持续控制蛋鸡中加利蛔虫感染。
背景:鸡蛔虫是散养鸡蛋生产中普遍存在的问题。线虫感染的可持续控制是该部门的一个关键组成部分。本研究探讨了一种治疗策略对加利利弧菌的影响,旨在为商业家禽养殖场使用驱虫药提供指导。方法:选取5个商品家禽养殖场的8只蛋鸡(A -h)进行试验。从放置后7-13周开始,每两周收集一次粪便样本,并使用麦克马斯特法计算蛔虫卵脱落量。禽群在达到每克粪便200个蛋(EPG)阈值后进行处理。结果:11 WPP时初始粪卵数最高为6700 EPG, 8 WPP时最低为50 EPG。最长的延迟检测为7周。处理次数最少为4次,最多为6次。两种治疗之间的最短和最长时间分别为5周和22周。结论:上述结果提示,应在鸡龄约7周龄时开始监测甲状芽孢杆菌,每8周重复一次,直至鸡龄50周龄。只有在观察到粪卵数量中高时才应给予治疗。此后的治疗可每8周重复一次,最终无需进行粪便检查。这些发现为兽医和鸡蛋生产者在蛋鸡生产阶段处理蛔虫感染提供了实际支持。
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来源期刊
Veterinary Record Open
Veterinary Record Open VETERINARY SCIENCES-
CiteScore
3.00
自引率
0.00%
发文量
25
审稿时长
19 weeks
期刊介绍: Veterinary Record Open is a journal dedicated to publishing specialist veterinary research across a range of topic areas including those of a more niche and specialist nature to that considered in the weekly Vet Record. Research from all disciplines of veterinary interest will be considered. It is an Open Access journal of the British Veterinary Association.
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