Acaricide efficiency of amitraz / cypermethrin and abamectin pour-on preparations in game

Merwe, J.S. Van der; Smit, F. J.; Durand, Anette M.; Kruger, L.P.; Michael, L.M.

doi:10.4102/ojvr.v72i4.187

Cited by 10 publications

(7 citation statements)

References 3 publications

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“…19 The antibody to Wesselsbron virus, which was used as the negative reagent control antibody in this study, was similarly prepared at the National Institute for Communicable Diseases, and validated for IHC at the Faculty of Veterinary Science, University of Pretoria. 25,34 In addition, to confirm that intravascular immunoreactivity observed in this study was due to RVFV antigens, tissue sections were sequentially tested with the antibodies to RVFV and Wesselsbron virus.…”

Section: Diagnostic Testsmentioning

confidence: 87%

Lesions and Cellular Tropism of Natural Rift Valley Fever Virus Infection in Young Lambs

et al. 2019

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A clear distinction can be made regarding the susceptibility to and the severity of lesions in young lambs when compared to adult sheep. In particular, there are important differences in the lesions and tropism of Rift Valley fever virus (RVFV) in the liver, kidneys, and lymphoid tissues of young lambs. A total of 84 lambs (<6 weeks old), necropsied during the 2010 to 2011 Rift Valley fever (RVF) outbreak in South Africa, were examined by histopathology and immunohistochemistry (IHC). Of the 84 lambs, 71 were positive for RVFV. The most striking diagnostic feature in infected lambs was diffuse necrotizing hepatitis with multifocal liquefactive hepatic necrosis (primary foci) against a background of diffuse hepatocellular death. Lymphocytolysis was present in all lymphoid organs except for the thymus. Lesions in the kidney rarely progressed beyond hydropic change and occasional pyknosis or karyolysis in renal tubular epithelial cells. Viral antigen was diffusely present in the cytoplasm of hepatocytes, but this labeling was noticeably sparse in primary foci. Immunolabeling for RVFV in young lambs was also detected in macrophages, vascular smooth muscle cells, adrenocortical epithelial cells, renal tubular epithelial cells, renal perimacular cells, and cardiomyocytes. RVFV immunolabeling was also often present in capillaries and small blood vessels either as non-cell-associated viral antigen, as antigen in endothelial cells, or intravascular cellular debris. Specimens from the liver, spleen, kidney, and lungs were adequate to confirm a diagnosis of RVF. Characteristic lesions were present in these organs with the liver and spleen being the most consistently positive for RVFV by IHC.

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Section: Diagnostic Testsmentioning

confidence: 87%

Lesions and Cellular Tropism of Natural Rift Valley Fever Virus Infection in Young Lambs

et al. 2019

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“…These ticks can inflict morbidity and mortality on wildlife and livestock directly through parasitism (Van Der Merwe et al . ), and also indirectly by serving as the vectors for a diversity of infectious agents, including protozoal, bacterial, and viral pathogens (Berggoetz et al . ).…”

Section: Integrated Management For Disease Controlmentioning

confidence: 99%

Can integrating wildlife and livestock enhance ecosystem services in central Kenya?

Allan

Tallis

Chaplin‐Kramer

et al. 2017

Frontiers in Ecol & Environ

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Because wildlife and livestock compete for grazing resources, biodiversity conservation and livestock ranching typically have been portrayed as conflicting uses of African savannas. Here, we offer an alternative perspective by describing a savanna ecosystem in central Kenya where wildlife and livestock exhibit a suite of potential positive interactions. For example, treating livestock with an acaricide offers the unintended benefit of removing ticks from the landscape, a result that has now been shown to occur at both large and small scales. When humans derive financial benefits both from wildlife (through tourism) and from livestock (through food production), they may achieve greater economic stability than when income is derived solely from one source. The integrated management of wildlife and livestock can simultaneously improve human health and wildlife conservation. Optimization of human and wildlife benefits will require the management of ecological and socioeconomic trade‐offs when conflicts occur between stakeholders.

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“…Similarly, some effects have been reported for abamectin and other AVMs in other tick species (Campbell et al, 1983;Ash and Oliver, 1989;Pereira et al, 2009;Doan et al, 2013). This may contribute and explain the successful use of AVMs as acaricides (Drummond, 1985;Van Der Merwe et al, 2005;Davey et al, 2010;Montasser et al, 2011).…”

Section: Discussionmentioning

confidence: 67%

Effect of Abamectin on Reproduction and Development of an Avian Tick, Argas (Persicargas) arboreus (Ixodoidea: Argasidae)

Aboutaleb

Shanbaky

Ahmed

et al. 2019

Egyptian Academic Journal of Biological Sciences. A, Entomology

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Entomology Journal publishes original research papers and reviews from any entomological discipline or from directly allied fields in ecology, behavioral biology, Topical application of a single dose (10µl/tick or egg batch) of different concentrations of abamectin (an avermectin) has lethal and biological effects on the engorged mated adult female, immatures and egg of Argas (Persicargas) arboreus that induced 100% mortality at 25,15 and 10 ppm, respectively. Abamectin treatment at lower concentrations of 1-10 ppm interfered with the female reproduction, nymphal and egg development.Abamectin topical (3-10 ppm) application on mated engorged adult female A. (P.) arboreus at different intervals of its reproductive cycle reduced fecundity and fertility of the female, prolonged its preoviposition, oviposition and the egg incubation periods. The effects were most prominent during vitellogenesis and the least at the start of oviposition.Abamectin treatment of the newly moulted fed 2 nd nymphal instar, delayed its moulting and of the resulted 3 rd instar and reduced adult emergence. The treatment caused paralysis and various deformities (15.6-28.6%) as missing legs at the coxal level, changes in colour and failure to moult or to detach the old exuvia in the resulted 3 rd nymphal instar.Egg batch treatment by dipping the freshly deposited eggs for 20 seconds in an aqueous solution of 1-5 ppm abamectin was more effective in reducing normal hatching, increasing unhatching and total inhibition of egg development than topical treatment. However, both methods of treatment similarly prolonged the egg incubation periods and caused abnormal hatching, malformations, and anomalies in the eggs and embryos.

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Acaricide efficiency of amitraz / cypermethrin and abamectin pour-on preparations in game

Cited by 10 publications

References 3 publications

Lesions and Cellular Tropism of Natural Rift Valley Fever Virus Infection in Young Lambs

Lesions and Cellular Tropism of Natural Rift Valley Fever Virus Infection in Young Lambs

Can integrating wildlife and livestock enhance ecosystem services in central Kenya?

Effect of Abamectin on Reproduction and Development of an Avian Tick, Argas (Persicargas) arboreus (Ixodoidea: Argasidae)

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