Biological control of sheep gastrointestinal nematode in three feeding systems in Northern China by using powder drug with nematophagous fungi

Liu, Xinyu; Chang, Fan-Fan; Zhao, Tian-Yu; Huang, Haiyan; Li, Feng-di; Feng, Wang; Wang, Bobo; Wang, Fenghui; Liu, Qi; Luo, Qian-Hui; Cai, Kui-Zheng; Zhong, Ren-Ma

doi:10.1080/09583157.2020.1765981

Cited by 10 publications

(6 citation statements)

References 26 publications

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“…Lysek and Araújo et al found that this group of fungi only showed physiological effects; hyphae adhered to the eggshells of helminths without egg destruction [33,34]. Therefore, the use of these fungi may have low efficiency, because undamaged eggs can cause recurrent infections [24]. There is, however, no doubt that the effect of predatory fungi on the larvae of GINs is satisfactory.…”

Section: Predatory Fungimentioning

confidence: 99%

“…However, nematophagous fungi (NF), as natural enemies of gastrointestinal helminth parasites, shape as the alternative to chemical controls with the most potential; they can be used to control the immature nematodes present in animal feces [21,22]. In recent years, biological controls have become an important research area in the control of helminths due to the absence of the disadvantages of chemical controls and conformity to the goals of ecological sustainability [23][24][25]. Predatory and ovicidal NF fungi have been shown in extensive in vitro and in vivo tests to effectively reduce recurrent infections by GINs in domestic animals [26].…”

Section: Duddingtoniamentioning

confidence: 99%

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Individual and Combined Application of Nematophagous Fungi as Biological Control Agents against Gastrointestinal Nematodes in Domestic Animals

Gong

et al. 2022

Pathogens

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Gastrointestinal nematodes (GINs) are a group of parasites that threaten livestock yields, and the consequent economic losses have led to major concern in the agricultural industry worldwide. The high frequency of anthelmintic resistance amongst GINs has prompted the search for sustainable alternatives. Recently, a substantial number of both in vitro and in vivo experiments have shown that biological controls based on predatory fungi and ovicidal fungi are the most promising alternatives to chemical controls. In this respect, the morphological characteristics of the most representative species of these two large groups of fungi, their nematicidal activity and mechanisms of action against GINs, have been increasingly studied. Given the limitation of the independent use of a single nematophagous fungus (NF), combined applications which combine multiple fungi, or fungi and chemical controls, have become increasingly popular, although these new strategies still have antagonistic effects on the candidates. In this review, we summarize both the advantages and disadvantages of the individual fungi and the combined applications identified to date to minimize recurring infections or to disrupt the life cycle of GINs. The need to discover novel and high-efficiency nematicidal isolates and the application of our understanding to the appropriate selection of associated applications are discussed.

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Section: Predatory Fungimentioning

confidence: 99%

Section: Duddingtoniamentioning

confidence: 99%

Individual and Combined Application of Nematophagous Fungi as Biological Control Agents against Gastrointestinal Nematodes in Domestic Animals

Gong

et al. 2022

Pathogens

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“…Similar results were found by using spores s u s p e n s i o n o f B a c i l l u s ci rc u l a n s (Sinott et al 2016). Nematophagous or nematocidal action of metabolites from various fungi has also been exploited positively which has the potential to be used against H. contortus (de Gives and Braga 2017; Liu et al 2020). A leguminous plant Sericea lespedeza, when grazed (fresh) on pastures or fed as hay (ground or pelleted), significantly reduced FEC of infected animals (Dykes et al 2019).…”

Section: Biological Controlmentioning

confidence: 99%

Ovine haemonchosis: a review

Naeem

Zahid²,

Roohi

2020

Trop Anim Health Prod

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Sheep farming is the backbone of a rural economy in developing countries, and haemonchosis is a major impediment in the way of its progress. Haemonchus contortus (H. contortus) infection persists all over the world particularly in the tropical and subtropical regions. Various review articles have been published to substantially cover one or more aspects of its morphology, prevalence, pathogenesis, symptoms, diagnosis, immune response, drug resistance, treatment, and control measure. The objective of this paper is to briefly review past and present information available in the aforementioned areas in one place to enable the readers to fully understand the problem from a broader perspective. H. contortus parasite harbours in abomasum of affected animal and feeds on its blood, producing mild to severe symptoms and even death in acute form. The parasite thus inflicts heavy production losses and is of economic importance. H. contortus has developed diverse characters over the years leading to limited success in the production of vaccines. Indiscriminate use of the anthelmintics has produced drug resistance against almost all conventional products. Efficacy of medicinal plants and non-conventional chemicals has been reported under controlled experiments; however, research on their adverse effects on growth and fertility is yet to be studied. Research on molecular tools for identification and introduction of resistant genes into the flock is also underway but still a long journey to find its field application. Crossbreeding may compromise the production traits of the existing flock. In given circumstances, a targeted selective treatment approach along with selective breeding, culling of more susceptible animals, and maintaining a good body condition score through the provision of a balanced diet remains a workable strategy to control haemonchosis in sheep.

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“…Drug-resistance to synthetic anthelmintics is a global problem related to the intensive use and inappropriate administration specially in small ruminants (Márquez 2003;Ploeger and Everts 2018;Castro Arnáez et al 2021). The nematophagous fungi Duddingtonia flagrans is used for biological control of gastrointestinal nematodes in ruminants (Liu et al 2020). Chlamydospores are orally administrated and are excreted in the feces where the fungi traps the nematodes (Ojeda-Robertos et al 2009;Sagüés et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Nematode predatory ability of the fungus Duddingtonia flagrans affected by in vitro sequential exposure to ovine gastrointestinal tract

et al. 2023

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Duddingtonia flagrans is a nematophagous fungus employed as a biocontrol agent of gastrointestinal nematodes in ruminants. After oral ingestion and passage through the digestive tract of animals, this microorganism captures the nematodes in the feces. The drastic conditions of ruminant digestive tract could affect fungi chlamydospores and therefore biocontrol activity. The aim of this study was to evaluate in vitro the effect of four ruminant digestive segments on the concentration and nematode predatory ability of a Colombian native strain of D. flagrans. The sequential four-step methodology proposed evaluated conditions of the oral cavity, rumen, abomasum, and small intestine such as pH (2, 6, 8), enzymes (pepsin, pancreatin), temperature (39 °C), and anaerobiosis comparing short (7 h) and long (51 h) exposure times. The results showed that the nematode predatory ability of the fungi is affected by sequential exposure to gastrointestinal segments and this effect depends on the exposure time to those conditions. After short exposure (7 h) through the four ruminant digestive segments, the fungi had a nematode predatory ability of 62%, in contrast, after long exposure (51 h) the nematode predatory ability was lost (0%). Moreover, the number of broken chlamydospores was higher in the long-exposure assay.

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Biological control of sheep gastrointestinal nematode in three feeding systems in Northern China by using powder drug with nematophagous fungi

Cited by 10 publications

References 26 publications

Individual and Combined Application of Nematophagous Fungi as Biological Control Agents against Gastrointestinal Nematodes in Domestic Animals

Individual and Combined Application of Nematophagous Fungi as Biological Control Agents against Gastrointestinal Nematodes in Domestic Animals

Ovine haemonchosis: a review

Nematode predatory ability of the fungus Duddingtonia flagrans affected by in vitro sequential exposure to ovine gastrointestinal tract

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