Pasture larval count as a supporting method for parasite epidemiology, population dynamic and control in ruminants

Molento, Marcelo Beltrão; Buzatti, Andréia; Sprenger, Lew Kan

doi:10.1016/j.livsci.2016.08.013

Cited by 37 publications

(22 citation statements)

References 57 publications

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“…Various methods have been extensively documented to recover infective stages of GINs and flukes from herbage or tracer animals, followed by microscopic counting and identification by morphological or molecular methods [25]. However, modern quantitative and qualitative molecular methods have not been sufficiently adapted for rapid estimation of the level of parasite challenge.…”

Section: Improved Diagnostics For Epidemiological Monitoringmentioning

confidence: 99%

100 Questions in Livestock Helminthology Research

Morgan

Aziz

Blanchard³

et al. 2019

Trends in Parasitology

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An elicitation exercise was conducted to collect and identify pressing questions concerning the study of helminths in livestock, to help guide research priorities. Questions were invited from the research community in an inclusive way. Of 385 questions submitted, 100 were chosen by online vote, with priority given to open questions in important areas that are specific enough to permit investigation within a focused project or programme of research. The final list of questions was divided into ten themes. We present the questions and set them briefly in the context of the current state of knowledge. Although subjective, results provide a snapshot of current concerns and perceived priorities in the field of livestock helminthology, and we hope will stimulate ongoing or new research efforts.

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Section: Improved Diagnostics For Epidemiological Monitoringmentioning

confidence: 99%

100 Questions in Livestock Helminthology Research

Morgan

Aziz

Blanchard³

et al. 2019

Trends in Parasitology

View full text Add to dashboard Cite

show abstract

“…nutrition and health programs) have an important impact on animal yield (Demirhan, 2019). Finishing lambs on pasture is challenging due to the high rate of nematode infections (Molento et al, 2016). Favorable conditions (temperature, pluviosity, and humidity) are essential for parasite viability on pasture (Bowman et al, 2003), and the climate in tropical and subtropical regions is favorable for Haemonchus contortus, the most prevalent and pathogenic nematode of small ruminants (Geary, 2016).…”

Section: Introductionmentioning

confidence: 99%

Can the strategies for endoparasite control affect the productivity of lamb production systems on pastures?

et al. 2019

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Ruminants Full-length research article Can the strategies for endoparasite control affect the productivity of lamb production systems on pastures? ABSTRACT-The objective of this study was to evaluate the productivity and carcass traits of unweaned Suffolk lambs finished on pasture and subjected to three strategies for endoparasite control: prophylactic treatment of all animals every 28 days; treatment of animals with a cut off number of nematode fecal egg count (FEC) ≥ 700; and treatment of animals using the FAMACHA scores ≥ 3. Average daily weight gain (ADG) and FEC were evaluated every 14 days for 112 days. Body condition scores and carcass characteristics were assessed before and after slaughter, respectively. Animal productivity was calculated based on animal stocking rate, ADG, and weight variation per area. Animal productivity, pasture, and carcass characteristics did not differ among strategies of parasite control. Parasite control strategies did not affect the productivity of lambs on pasture or carcass characteristics. Thus, the use of selective treatments can be considered advantageous due to decreased selection pressure for resistant parasite populations and lower use of drugs.

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“…In this population, males and females have been shown to be spatially structured (Supplementary Data 1 and [32,57,66]) and to have stable home ranges from year to year (see [54], Appendix S2 in [55]). Because H. contortus has a direct life cycle (monoxenous parasite), for which free-living infesting larvae remain close to the host feces [59], we expected the socio-spatial behavior to generate a spatial genetic signature in the population of H. contortus.…”

Section: Introductionmentioning

confidence: 99%

Does host socio-spatial behavior lead to a fine-scale spatial genetic structure in its associated parasites?

et al. 2019

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Gastro-intestinal nematodes, especially Haemonchus contortus, are widespread pathogenic parasites of small ruminants. Studying their spatial genetic structure is as important as studying host genetic structure to fully understand host-parasite interactions and transmission patterns. For parasites having a simple life cycle (e.g., monoxenous parasites), gene flow and spatial genetic structure are expected to strongly rely on the socio-spatial behavior of their hosts. Based on five microsatellite loci, we tested this hypothesis for H. contortus sampled in a wild Mediterranean mouflon population (Ovis gmelini musimon × Ovis sp.) in which species- and environment-related characteristics have been found to generate socio-spatial units. We nevertheless found that their parasites had no spatial genetic structure, suggesting that mouflon behavior was not enough to limit parasite dispersal in this study area and/or that other ecological and biological factors were involved in this process, for example other hosts, the parasite life cycle, or the study area history.

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Pasture larval count as a supporting method for parasite epidemiology, population dynamic and control in ruminants

Cited by 37 publications

References 57 publications

100 Questions in Livestock Helminthology Research

100 Questions in Livestock Helminthology Research

Can the strategies for endoparasite control affect the productivity of lamb production systems on pastures?

Does host socio-spatial behavior lead to a fine-scale spatial genetic structure in its associated parasites?

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