Dispersal and concentration of sheep gastrointestinal nematode larvae on tropical pastures

Tontini, Jalise Fabíola; Poli, César Henrique Espírito Candal; Hampel, Viviane da Silva; Fajardo, Neuza Maria Campos; Martins, Anelise Afonso; Minho, Alessandro Pelegrine; Muir, James P.

doi:10.1016/j.smallrumres.2019.03.013

Cited by 12 publications

(13 citation statements)

References 22 publications

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“…These samples were placed in plastic bags, identified and processed according to the modified method of [3] to allow the larvae from the pasture to recover. All larvae found in the final sample were counted and classified into larval stages (L1 or L2) and infective larvae (L3).…”

Section: Plos Onementioning

confidence: 99%

“…It is worth mentioning that the choice of forage cultivar neither controls nor facilitates the genera of GINs in pastures. Several dynamics that result from the interactions between climate and microclimate, plant characteristics, the quantity and genera that hosts deposit, the characteristics of each genus and species (the development of structures and physical and genetic mechanisms for survival) and management (grazing, nutritional and parasitic management) play a key role in controlling GINs [32].…”

Section: Plos Onementioning

confidence: 99%

“…One water film is sufficient to allow L3 larvae to move on the plant [40]. Rainfall facilitates the migration of L3 from the faeces to the pasture, and high temperatures can increase the speed of the migration of larvae to the top and along the leaf blades of the pasture [32].…”

Section: Plos Onementioning

confidence: 99%

“…Since the percentage of parasites is highest in pastures (soil and plant) [3], the microclimate of pastures is indispensable to the development and survival of infective larvae [3,4]. Methods that prevent or reduce the contact between infective parasites and their hosts should thus be used in livestock systems [5].…”

Section: Introductionmentioning

confidence: 99%

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The effect of Brachiaria brizantha cultivars on host-parasite-environment interactions in sheep naturally infected with gastrointestinal nematodes

et al. 2020

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The objective was to evaluate the effect of different cultivars of Brachiaria brizantha on the dynamics and concentration of the larval stages of gastrointestinal nematodes in the soil and forage strata, as well as their effects on the performance of naturally infected lambs. Overall, 48 90-day-old lambs with an initial weight of 19.04 ± 0.96 kg were observed. Moreover, a randomised block factorial design with four cultivars of Brachiaria brizantha (Marandu, Xaraé s, Piatã and Paiaguá s grasses) under intermittent stocking (with a pre-grazing canopy height of 40 cm and post-grazing canopy height of 20 cm) for two grazing cycles was used. The following variables were analysed: faecal egg counting, faecal culture, mean corpuscular volume, FAMACHA © score, weight and body condition score, the recovery of larvae from pasture and soil samples, nutritional value and the production and structural components of forage. Lambs grazing Marandu grass demonstrated the highest level of nematode infection (P < 0.05). However, the nutritional value did not differ between cultivars. Marandu grass had the highest pasture density (P < 0.05), while Paiaguá s grass had the highest percentage of dead material (P < 0.05). The various genera of gastrointestinal nematodes found in the faecal cultures, regardless of the cultivars, include Haemonchus (92.01%), Trichostrongylus (4.55%), Strongyloides (3.06%) and Oesophagostomum (0.37%). Lambs grazing Xaraé s grass had the lowest body weight (P < 0.05). Furthermore, larvae concentrations were highest in Marandu and Paiaguá s pastures; infective Haemonchus and Trichostrongylus larvae were recovered from pasture and soil samples. The different cultivars of Brachiaria brizantha produce diverse and relevant microclimatic conditions to contaminate soil, pastures and animals. Animal performance was not compromised despite the Marandu and Paiaguá s cultivars having the highest levels of contamination and infection. Based on parasitological aspects, the Brachiaria brizantha cultivars Xaraé s and

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Section: Plos Onementioning

confidence: 99%

Section: Plos Onementioning

confidence: 99%

Section: Plos Onementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The effect of Brachiaria brizantha cultivars on host-parasite-environment interactions in sheep naturally infected with gastrointestinal nematodes

et al. 2020

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“…A recent study performed in Brazil reported no differences in L 3 content between two grazing systems (grass vs. grass + legumes) using the pasture larval count technique (PLCT). However, that study used a short legume that grew mixed within the grass [ 70 ]. In heterogeneous vegetation systems such as the LDF, the dynamics of L 3 migration may represent a distinct pattern.…”

Section: Unravelling the Heterogeneous Context Of The Low Deciduoumentioning

confidence: 99%

Small Ruminant Production Based on Rangelands to Optimize Animal Nutrition and Health: Building an Interdisciplinary Approach to Evaluate Nutraceutical Plants

Torres-Fajardo

González-Pech

Sandoval-Castro

et al. 2020

Animals

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The plant kingdom can influence the productivity and health of herbivores at different levels. However, demonstrating this process in a scientific manner entails substantial endeavors from different disciplines. In the present review, we will describe the features of a native vegetation system traditionally used by small ruminants and use its particularities to build an interdisciplinary approach to evaluate the nutraceutical properties of plants. Initially, we will establish the context of the low deciduous forest (LDF), considering some botanical and nutritional aspects, as well as the presence of plant secondary compounds (PSC) and gastrointestinal nematodes (GIN). Furthermore, we will focus on coevolutionary aspects that undoubtedly shaped the plants–nutrients–PSC–GIN–herbivore relationship. In addition, the concept of nutraceutical will be discussed to provide clarity and aspects to be considered for their evaluation. Then, ethological, agronomical, nutritional, PSC, parasitological and animal species issues are deepened placing emphasis on methodological approaches. Special focus is given to condensed tannins, as they are the fourth largest group of PSCs and the most studied in livestock sciences. Validation of the nutraceutical properties of plants from native vegetation systems should be seen as a process derived from many scientific disciplines that feed into each other in a cyclic manner.

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Extruded urea levels in lamb supplementation in rainy tropical savanna conditions: the triad host-gastrointestinal nematodes-environment

Roberto

Difante

Costa

et al. 2023

Trop Anim Health Prod

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Dispersal and concentration of sheep gastrointestinal nematode larvae on tropical pastures

Cited by 12 publications

References 22 publications

The effect of Brachiaria brizantha cultivars on host-parasite-environment interactions in sheep naturally infected with gastrointestinal nematodes

The effect of Brachiaria brizantha cultivars on host-parasite-environment interactions in sheep naturally infected with gastrointestinal nematodes

Small Ruminant Production Based on Rangelands to Optimize Animal Nutrition and Health: Building an Interdisciplinary Approach to Evaluate Nutraceutical Plants

Extruded urea levels in lamb supplementation in rainy tropical savanna conditions: the triad host-gastrointestinal nematodes-environment

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