A systematic review and meta-analysis of factors associated with anthelmintic resistance in sheep

Falzon, Laura C.; O’Neill, Tyler J.; Menzies, Paula I.; Peregrine, Andrew S.; Jones‐Bitton, Andria; VanLeeuwen, John A.; Mederos, A.

doi:10.1016/j.prevetmed.2014.07.003

Cited by 79 publications

(52 citation statements)

References 101 publications

(135 reference statements)

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“…Values are given in percentages B-^larval identification was not possible as no larvae were obtained in the larval culture of this group at that time K value = 0.64 from several sheep flocks from different origins, and this is a well-known risk factor for AR (Falzon et al 2014). BZ resistance is widely distributed in meat and dairy sheep industries in France as it has been demonstrated in the western (Hubert et al 1991;Chartier et al 1998), southwestern (Geurden et al 2014), and southeastern parts (Beugnet 1992) of the country.…”

Section: Discussionmentioning

confidence: 99%

A real-time PCR approach to identify anthelmintic-resistant nematodes in sheep farms

et al. 2017

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Resistance to fenbendazole, ivermectin, and moxidectin was explored by a fecal egg count reduction test in four meat sheep flocks in southwestern France where anthelmintic resistance was suspected. The FECR test results of the present study confirmed the presence of benzimidazole resistance in three out of the four farms and the presence of ivermectin resistance in one flock. In addition, a suspicion of moxidectin resistance was shown in this latter farm. Both conventional morphological and molecular identifications were performed on larval cultures before and after the treatment in the studied farms. A high positive correlation was found between the number of larvae counted under binocular microscope and the number of larvae estimated by the qPCR analysis (R 2 = 0.88) and a high Cohen's Kappa value (0.91) in the detection of strongylid larvae in larval cultures. According to qPCR results, Trichostrongylus species demonstrated high levels of BZ resistance and Teladorsagia circumcincta was involved in the IVM resistance in one farm. The molecular procedures used in this study have the potential to be beneficial for anthelmintic resistance surveillance in sheep industry.

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Section: Discussionmentioning

confidence: 99%

A real-time PCR approach to identify anthelmintic-resistant nematodes in sheep farms

et al. 2017

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“…This will become worse as none of the monitored properties have more than two drug options to define an effective chemical parasitic control strategy. There is no doubt that this scenario should also be a concern for other regions (GETACHEW et al, 2007;VÁRADY et al, 2011;CORNELIUS et al, 2014;FALZON et al, 2014), especially for those countries that border the state (Argentina and Uruguay).…”

Section: Discussionmentioning

confidence: 99%

Multiple anthelmintic resistance in Southern Brazil sheep flocks

Oliveira

Riet-Correa

Estima-Silva

et al. 2017

Rev. Bras. Parasitol. Vet.

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Gastrointestinal parasites represent an important cause of reduced productivity of sheep worldwide. As anthelmintic are still the main control tool for these parasites, this work evaluated the efficacy of commercially available active principles in 22 sheep flocks in the southern region of Rio Grande do Sul, Brazil. In each farm 10 sheep were randomly distributed in seven groups with the following treatments: abamectin; albendazole; closantel; levamisole; monepantel; trichlorphon and no anthelmintic (control). All flocks showed resistance to at least three anthelmintics and in 20 farms only two products demonstrated efficacy for parasitic control. In two farms, there was no susceptibility to the six active principles tested. The results of this study provide evidence that the common commercially available anthelmintic are not assuring effective chemical control of gastrointestinal parasitic infections in ovine flocks in the southern region of Rio Grande do Sul. Monepantel, the newest introduced drug in the Brazilian market was not effective in 18% of the flocks tested, confirming that the parasitic resistance can be established quickly after the introduction of new molecules mainly when alternative program of parasite control is not performed.Keywords: Sheep breeding, gastrointestinal nematodes, chemical control, resistance. ResumoAs parasitoses gastrintestinais representam importante causa de queda na produtividade na ovinocultura mundial. Como a utilização de anti-helmínticos é, ainda, a principal forma de controle parasitário, o presente estudo avaliou a eficácia de princípios ativos comercialmente disponíveis, em 22 rebanhos ovinos da região Sul do Rio Grande do Sul, Brasil. Em cada propriedade foram utilizados 10 ovinos divididos em sete grupos que receberam os seguintes tratamentos: abamectina; albendazole; closantel; levamisole; monepantel; e triclorfon. Um grupo permaneceu como controle, sem tratamento anti-helmíntico. Nas 22 propriedades do estudo houve resistência, no mínimo, a três anti-helmínticos. Em 20 propriedades apenas dois produtos demonstraram eficácia para o controle parasitário. Em duas propriedades não houve sensibilidade aos seis princípios ativos testados. Os resultados do presente estudo demonstraram que os anti-helmínticos disponíveis no marcado Brasileiro não asseguram um controle parasitário efetivo nos rebanhos ovinos da região Sul do Rio Grande do Sul, incluindo o monepantel que foi ineficaz em 18% dos rebanhos testados, confirmando que a resistência dos parasitos aos princípios ativos pode se estabelecer rapidamente após a introdução de novas moléculas, principalmente quando programas alternativos de controle não são realizados.Palavras-chave: Ovinocultura, nematoides gastrintestinais, controle químico de parasitos, resistência.

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“…However, anthelmintic resistance among gastrointestinal helminths of domestic animals is a major challenge in veterinary medicine (Kaplan 2004;Wolstenholme et al 2004), and similar challenges could arise with the broad-scale distribution of anthelmintic baits for B. procyonis control. Among domestic animals, emergence of anthelmintic resistance appears to be associated with a lack of refugia for anthelmintic-susceptible parasites and administration of dosages below therapeutic levels (Falzon et al 2014). Anthelmintic bait distribution for B. procyonis control would maintain abundant refugia for susceptible nematodes.…”

Section: Discussionmentioning

confidence: 99%

EVALUATION OF ANTHELMINTIC FISHMEAL POLYMER BAITS FOR THE CONTROL OF BAYLISASCARIS PROCYONIS IN FREE-RANGING RACCOONS (PROCYON LOTOR)

Smyser

Johnson

Stallard

et al. 2015

Journal of Wildlife Diseases

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ABSTRACT:Baylisascaris procyonis is a common gastrointestinal parasite of raccoons (Procyon lotor) and is a zoonotic helminth with the potential to cause severe or fatal infection. Raccoons thrive in human-dominated landscapes, and the fecal-oral transmission pathway and lack of effective treatment make B. procyonis a serious threat to public health. The distribution of medicinal baits has emerged as a socially acceptable and cost-effective method for managing disease in free-ranging wildlife. We assessed the suitability of a mass-producible anthelmintic bait for B. procyonis mitigation by evaluating the willingness of free-ranging raccoons to consume anthelmintic baits and determining whether bait consumption successfully cleared B. procyonis infections from raccoons. Anthelmintic baits were modified from standard fishmeal polymer baits, the food attractant commonly used in oral rabies vaccine baits, with the introduction of 220 mg of pyrantel pamoate into the fishmeal mixture. We captured 16 naturally infected raccoons, presented one anthelmintic bait, and monitored B. procyonis infection over 90 d by screening feces for eggs. Treatment cleared B. procyonis infections for nine of 12 raccoons that consumed .10 g of the 15 g bait. We used remote cameras to monitor in situ patterns of bait consumption for anthelmintic baits relative to standard baits. Both anthelmintic and standard baits were rapidly consumed, with no differences in the rate of consumption between bait types. However, after bait contact, raccoons demonstrated a greater willingness to consume standard baits while ignoring anthelmintic baits more frequently (P50.06). Initial trials of anthelmintic baits show promise, although refinement in both dose and palatability is needed. At mass production scales, the addition of pyrantel pamoate to fishmeal polymer baits would be inexpensive, potentially making anthelmintic baits a viable management option when coupled with an oral rabies vaccine or used independently for B. procyonis mitigation.

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A systematic review and meta-analysis of factors associated with anthelmintic resistance in sheep

Cited by 79 publications

References 101 publications

A real-time PCR approach to identify anthelmintic-resistant nematodes in sheep farms

A real-time PCR approach to identify anthelmintic-resistant nematodes in sheep farms

Multiple anthelmintic resistance in Southern Brazil sheep flocks

EVALUATION OF ANTHELMINTIC FISHMEAL POLYMER BAITS FOR THE CONTROL OF BAYLISASCARIS PROCYONIS IN FREE-RANGING RACCOONS (PROCYON LOTOR)

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