1
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Simonart T, Lam Hoai XL. Escalating Threat of Drug-Resistant Human Scabies: Current Insights and Future Directions. J Clin Med 2024; 13:5511. [PMID: 39336998 DOI: 10.3390/jcm13185511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2024] [Revised: 09/12/2024] [Accepted: 09/14/2024] [Indexed: 09/30/2024] Open
Abstract
Background: Scabies is a prevalent dermatological condition with significant public health implications. The recent rise in drug-resistant scabies presents new challenges for effective disease management and control. Methods: A comprehensive literature review was conducted using PubMed, Cochrane Library, and Web of Science. Studies published from 2000 to August 2024 were considered, focusing on those reporting drug-resistant scabies and advancements in treatment approaches. Results: Clinical studies, in vitro investigations, and case reports show significant resistance of human scabies to permethrin. Main resistance mechanisms involve genetic mutations in the mites' voltage-gated sodium channels (VGSCs) and enhanced activity or expression of the detoxifying enzyme glutathione S-transferase (GST). Resistance to ivermectin and benzyle benzoate, although suggested by some authors, seems less obvious. The clinical evidence of widespread ivermectin resistance in human scabies infestations is lacking, despite indications of increased tolerance in laboratory settings and anecdotal reports of resistance in patients with crusted scabies. Benzyl benzoate resistance in scabies mites remains unconfirmed. Conclusions: Permethrin-resistant scabies is an escalating threat requiring new management strategies and updated guidelines. Infection control measures, alternative treatments, and ongoing research into new therapeutics are crucial to mitigate the impact of drug-resistant scabies.
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Affiliation(s)
- Thierry Simonart
- Department of Dermatology, Delta Hospital, CHIREC, Université Libre de Bruxelles, 1160 Bruxelles, Belgium
| | - Xuân-Lan Lam Hoai
- Department of Dermatology, St Pierre-Brugmann-HUDERF University Hospitals, Université Libre de Bruxelles, 1000 Brussels, Belgium
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2
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Pérez JM, Jesser EN, Werdin JO, Berry C, Gebely MA, Crespo-Ginés R, Granados JE, López-Montoya AJ. In vitro acaricidal activity of several natural products against ibex-derived Sarcoptes scabiei. Vet Parasitol 2024; 328:110189. [PMID: 38714065 DOI: 10.1016/j.vetpar.2024.110189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 04/18/2024] [Accepted: 04/22/2024] [Indexed: 05/09/2024]
Abstract
In this study we analysed the effect of the temperature, diverse strains of Bacillus thuringiensis, Lysinibacillus sphaericus and nanoformulations with essential plant oils (EONP) on the survival of Sarcoptes scabiei mites derived from naturally-infested Iberian ibex (Capra pyrenaica). In general, mites maintained at 12ºC survived more than those maintained at 35ºC (40.7 hr and 31.2 hr, respectively). Mites with no treatment survived 27.6 h on average. Mites treated with B. thuringiensis serovar. konkukian and geranium EONP showed significant reduction in their survival. Despite the fact that these agents seem to be promising candidates for controlling sarcoptic mange in the field, further research is still needed to get stable, efficient and eco-friendly acaricides.
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Affiliation(s)
- Jesús M Pérez
- Departamento de Biología Animal, Vegetal y Ecología, Universidad de Jaén, Campus Las Lagunillas, s.n., Jaén E-23071, Spain.
| | - Emiliano N Jesser
- Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, San Juan 670, Bahía Blanca B 8000CPB, Argentina
| | - Jorge O Werdin
- Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, San Juan 670, Bahía Blanca B 8000CPB, Argentina
| | - Colin Berry
- School of Biosciences, Cardiff University, Museum Avenue, Cardiff CF10 3AX, UK
| | - Mohamed A Gebely
- School of Biosciences, Cardiff University, Museum Avenue, Cardiff CF10 3AX, UK; Department of Parasitology and Animal Diseases, Veterinary Research Institute, National Research Centre, Dokki, Giza 12622, Egypt
| | - Raquel Crespo-Ginés
- Departamento de Biología Animal, Vegetal y Ecología, Universidad de Jaén, Campus Las Lagunillas, s.n., Jaén E-23071, Spain; Instituto de Investigación en Recursos Cinegéticos (IREC-CSIC, UCLM, JCCM), Ronda de Toledo 12, Ciudad Real E-13071, Spain
| | - José E Granados
- Centro Administrativo Parque Nacional y Parque Natural Sierra Nevada, Carretera Antigua Sierra Nevada, Km 7, E-18071, Pinos Genil, Granada, Spain
| | - Antonio J López-Montoya
- Department of Statistics and Operational Research, Jaén University, Campus Las Lagunillas, s.n., Jaén E-23071, Spain
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3
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Furnival-Adams J, Kiuru C, Sagna AB, Mouline K, Maia M, Chaccour C. Ivermectin resistance mechanisms in ectoparasites: a scoping review. Parasitol Res 2024; 123:221. [PMID: 38787430 PMCID: PMC11126493 DOI: 10.1007/s00436-024-08223-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Accepted: 04/24/2024] [Indexed: 05/25/2024]
Abstract
Ivermectin mass drug administration has been used for decades to target human and veterinary ectoparasites, and is currently being considered for use against malaria vectors. Although there have been few reports of resistance to date in human ectoparasites, we must anticipate the development of resistance in mosquitoes in the future. Hence, through this review, we mapped the existing evidence on ivermectin resistance mechanisms in human ectoparasites. A search was conducted on the 8th November 2023 through databases, PubMed, Web of Science, and Google Scholar, using terms related to ivermectin, human and veterinary ectoparasites, and resistance. Abstracts (5893) were screened by JFA and CK. Data on the study organism, the type of resistance, the analysis methods, and, where applicable, the gene loci of interest were extracted from the studies. Details of the methodology and results of each study were summarised narratively and in a table. Eighteen studies were identified describing ivermectin resistance in ectoparasites. Two studies described target site resistance; and 16 studies reported metabolic resistance and/or changes in efflux pump expression. The studies investigated genetic mutations in resistant organisms, detoxification, and efflux pump expression in resistant versus susceptible organisms, and the effect of synergists on mortality or detoxification enzyme/efflux pump transcription. To date, very few studies have been conducted examining the mechanisms of ivermectin resistance in ectoparasites, with only two on Anopheles spp. Of the existing studies, most examined detoxification and efflux pump gene expression, and only two studies in lice investigated target-site resistance. Further research in this field should be encouraged, to allow for close monitoring in ivermectin MDA programmes, and the development of resistance mitigation strategies.
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Affiliation(s)
- Joanna Furnival-Adams
- Barcelona Institute for Global Health (ISGlobal), Barcelona, Spain.
- Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona (UB), Barcelona, Spain.
| | - Caroline Kiuru
- Barcelona Institute for Global Health (ISGlobal), Barcelona, Spain
- Centro de Investigação Em Saúde de Manhiça (CISM), Maputo, Mozambique
| | | | - Karine Mouline
- MIVEGEC, University of Montpellier, IRD, CNRS, Montpellier, France
| | - Marta Maia
- Kenya Medical Research Institute, Wellcome Trust Research Programme, Kilifi, Kenya
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Carlos Chaccour
- Barcelona Institute for Global Health (ISGlobal), Barcelona, Spain
- CIBER de Enfermedades Infecciosas, Madrid, Spain
- Universidad de Navarra, Pamplona, Spain
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4
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Galván-Casas C, Ortiz-Álvarez J, Martínez-García E, Corbacho-Monné M. Spanish Academy of Dermatology and Venereology (AEDV) expert recommendations for the management of sexual transmitted parasitosis. Scabies, and pediculosis pubis. ACTAS DERMO-SIFILIOGRAFICAS 2024; 115:475-492. [PMID: 38061452 DOI: 10.1016/j.ad.2023.11.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 11/16/2023] [Accepted: 11/21/2023] [Indexed: 01/28/2024] Open
Abstract
Sexually transmitted infections are communicable diseases where the pathogen is transmitted through sexual contact. The Sexually Transmitted Infections Working Group of the Spanish Academy of Dermatology and Venereology (AEDV) is engaged in the drafting of documents to guide dermatologists and health care personnel who treat Spanish patients with these infections. This document analyzes the epidemiological, clinical, therapeutic, and control characteristics of 2 sexually transmitted parasitosis: scabies due to Sarcoptes scabiei var. hominis, and pubic pediculosis due to Phthirus pubis. Both parasitoses share a sort of mixed spread through sexual and community transmission regardless of the route through which the infection was initially acquired. This specific feature creates particularities in the management and control of the infestation.
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Affiliation(s)
- C Galván-Casas
- Unidad Skin Neglected Tropical Diseases and Sexually Transmitted Infections; Fundación Lucha contra las Infecciones, Badalona, Barcelona, España; Servicio de Dermatología, Hospital Universitario de Móstoles, Móstoles, Madrid, España.
| | - J Ortiz-Álvarez
- Servicio de Dermatología, Hospital Universitario Virgen del Rocío, Sevilla, España
| | - E Martínez-García
- Servicio de Dermatología, Hospital Virgen de la Victoria, Málaga, España
| | - M Corbacho-Monné
- Servicio de Dermatología, Hospital Universitari Parc Taulí, Sabadell, Barcelona, España
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5
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Galván-Casas C, Ortiz-Álvarez J, Martínez-García E, Corbacho-Monné M. [Translated article] Spanish Academy of Dermatology and Venereology (AEDV) expert recommendations for the management of sexual transmitted parasitosis. Scabies, and pediculosis pubis. ACTAS DERMO-SIFILIOGRAFICAS 2024; 115:T475-T492. [PMID: 38479688 DOI: 10.1016/j.ad.2024.03.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Accepted: 11/21/2023] [Indexed: 05/05/2024] Open
Abstract
Sexually transmitted infections are communicable diseases where the pathogen is transmitted through sexual contact. The Sexually Transmitted Infections Working Group of the Spanish Academy of Dermatology and Venereology (AEDV) is engaged in the drafting of documents to guide dermatologists and health care personnel who treat Spanish patients with these infections. This document analyzes the epidemiological, clinical, therapeutic, and control characteristics of 2 sexually transmitted parasitosis: scabies due to Sarcoptes scabiei var. hominis, and pubic pediculosis due to Phthirus pubis. Both parasitoses share a sort of mixed spread through sexual and community transmission regardless of the route through which the infection was initially acquired. This specific feature creates particularities in the management and control of the infestation.
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Affiliation(s)
- C Galván-Casas
- Unidad Skin Neglected Tropical Diseases and Sexually Transmitted Infections; Fundació Lluita contra les Infeccions, Badalona, Barcelona, Spain; Servicio de Dermatología, Hospital Universitario de Móstoles, Móstoles, Madrid, Spain.
| | - J Ortiz-Álvarez
- Servicio de Dermatología, Hospital Universitario Virgen del Rocío, Sevilla, Spain
| | - E Martínez-García
- Servicio de Dermatología, Hospital Virgen de la Victoria, Málaga, Spain
| | - M Corbacho-Monné
- Servicio de Dermatología, Hospital Universitari Parc Taulí, Sabadell, Barcelona, Spain
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6
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Meltan S, Panuganti B, Tarbox M. Evaluation and Management of Pruritus and Scabies in the Elderly Population. Clin Geriatr Med 2024; 40:91-116. [PMID: 38000864 DOI: 10.1016/j.cger.2023.09.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2023]
Abstract
Pruritus is the most common dermatologic complaint in the geriatric population. Its growing prevalence coincides with the rapid growth of the elderly population (>65 years of age) in the United States. According to the US Census Bureau, 16.9% of the population, or more than 56 million adults 65 years and older, lived in the United States in 2022. Pruritus is a condition that accompanies a diverse array of underlying etiologic factors. The mechanism of normal itch impulse transmission has been recently elucidated. The itch sensation originates from epidermal/dermal receptors connected to unmyelinated, afferent C-fibers that transmit the impulse from the periphery.
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Affiliation(s)
- Shakira Meltan
- School of Medicine, Texas Tech University Health Sciences Center, TX, USA
| | | | - Michelle Tarbox
- Department of Dermatology, Texas Tech Health Science Center, 3601 4th Street, Stop 9400, Lubbock, TX 79430, USA.
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7
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Mbuagbaw L, Sadeghirad B, Morgan RL, Mertz D, Motaghi S, Ghadimi M, Babatunde I, Zani B, Pasumarthi T, Derby M, Kothapudi VN, Palmer NR, Aebischer A, Harder T, Reichert F. Failure of scabies treatment: a systematic review and meta-analysis. Br J Dermatol 2024; 190:163-173. [PMID: 37625798 DOI: 10.1093/bjd/ljad308] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 08/18/2023] [Accepted: 08/20/2023] [Indexed: 08/27/2023]
Abstract
BACKGROUND Treatment failure is considered to be an important factor in relation to the increase in scabies incidence over the last decade. However, the regional and temporal differences, in addition to the predictors of therapy failure, are unclear. OBJECTIVES We aimed to conduct a systematic review of the prevalence of treatment failure in patients with scabies and investigation of associated factors. METHODS We searched MEDLINE, EMBASE, CINAHL, Web of Science, Scopus, Global Health and the Cochrane Central Register of Controlled Trials from inception to August 2021 for randomized and quasi-randomized trials, in addition to observational studies that enrolled children or adults diagnosed with confirmed or clinical scabies treated with permethrin, ivermectin, crotamiton, benzyl benzoate, malathion, sulfur or lindane, and measured treatment failure or factors associated with treatment failure. We performed a random effects meta-analysis for all outcomes reported by at least two studies. RESULTS A total of 147 studies were eligible for inclusion in the systematic review. The overall prevalence of treatment failure was 15.2% [95% confidence interval (CI) 12.9-17.6; I2 = 95.3%, moderate-certainty evidence] with regional differences between World Health Organization regions (P = 0.003) being highest in the Western Pacific region (26.9%, 95% CI 14.5-41.2). Oral ivermectin (11.8%, 95% CI 8.4-15.4), topical ivermectin (9.3%, 95% CI 5.1-14.3) and permethrin (10.8%, 95% CI 7.5-14.5) had relatively lower failure prevalence compared with the overall prevalence. Failure prevalence was lower in patients treated with two doses of oral ivermectin (7.1%, 95% CI 3.1-12.3) compared with those treated with one dose (15.2%, 95% CI 10.8-20.2; P = 0.021). Overall and permethrin treatment failure prevalence in the included studies (1983-2021) increased by 0.27% and 0.58% per year, respectively. Only three studies conducted a multivariable risk factor analysis; no studies assessed resistance. CONCLUSIONS A second dose of ivermectin showed lower failure prevalence than single-dose ivermectin, which should be considered in all guidelines. The increase in treatment failure over time hints at decreasing mite susceptibility for several drugs, but reasons for failure are rarely assessed. Ideally, scabicide susceptibility testing should be implemented in future studies.
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Affiliation(s)
- Lawrence Mbuagbaw
- Biostatistics Unit/The Research Institute, St Joseph's Healthcare, Hamilton, ON, Canada
- Department of Health Research Methods, Evidence, and Impact
- Department of Anesthesia
| | - Behnam Sadeghirad
- Department of Health Research Methods, Evidence, and Impact
- Department of Anesthesia
- Michael G. DeGroote National Pain Centre
| | - Rebecca L Morgan
- Department of Health Research Methods, Evidence, and Impact
- Evidence Foundation, Cleveland Heights, OH, USA
- School of Medicine, Case Western Reserve University, Cleveland, OH, USA
| | - Dominik Mertz
- Department of Health Research Methods, Evidence, and Impact
- Department of Medicine, McMaster University, Hamilton, ON, Canada
| | | | - Maryam Ghadimi
- Department of Health Research Methods, Evidence, and Impact
| | | | - Babalwa Zani
- Knowledge Translation Unit, University of Cape Town Lung Institute, Rondebosch, South Africa
| | | | | | | | | | | | - Thomas Harder
- Department of Infectious Disease Epidemiology, Robert Koch Institute, Berlin, Germany
| | - Felix Reichert
- Department of Infectious Disease Epidemiology, Robert Koch Institute, Berlin, Germany
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8
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Sagna AB, Zéla L, Ouedraogo COW, Pooda SH, Porciani A, Furnival-Adams J, Lado P, Somé AF, Pennetier C, Chaccour CJ, Dabiré RK, Mouline K. Ivermectin as a novel malaria control tool: Getting ahead of the resistance curse. Acta Trop 2023; 245:106973. [PMID: 37352998 DOI: 10.1016/j.actatropica.2023.106973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 06/14/2023] [Accepted: 06/16/2023] [Indexed: 06/25/2023]
Abstract
Reduction in malaria clinical cases is strongly dependent on the ability to prevent Anopheles infectious bites. Vector control strategies using long-lasting insecticidal nets and indoor residual spraying with insecticides have contributed to significantly reduce the incidence of malaria in many endemic countries, especially in the Sub-Saharan region. However, global progress in reducing malaria cases has plateaued since 2015 mostly due to the increased insecticide resistance and behavioral changes in Anopheles vectors. Additional control strategies are thus required to further reduce the burden of malaria and contain the spread of resistant and invasive Anopheles vectors. The use of endectocides such as ivermectin as an additional malaria control tool is now receiving increased attention, driven by its different mode of action compared to insecticides used so far and its excellent safety record for humans. In this opinion article, we discuss the advantages and disadvantages of using ivermectin for malaria control with a focus on the risk of selecting ivermectin resistance in malaria vectors. We also highlight the importance of understanding how ivermectin resistance could develop in mosquitoes and what its underlying mechanisms and associated molecular markers are, and propose a research agenda to manage this phenomenon.
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Affiliation(s)
- André B Sagna
- MIVEGEC, University of Montpellier, IRD, CNRS, Montpellier, France.
| | - Lamidi Zéla
- Centre International de Recherche-Développement sur l'Elevage en zone Subhumide, Bobo-Dioulasso, Burkina Faso
| | - Cheick Oumar W Ouedraogo
- Institut de Recherche en Sciences de la Santé, Direction Régionale de l'Ouest, Centre National de Recherche Scientifique et Technologique, Bobo-Dioulasso, Burkina Faso
| | - Sié H Pooda
- Centre International de Recherche-Développement sur l'Elevage en zone Subhumide, Bobo-Dioulasso, Burkina Faso; Université de Dédougou, Dédougou, Burkina Faso
| | | | | | - Paula Lado
- Center for Vector-borne Infectious Diseases, Colorado State University, Fort Collins, CO, USA
| | - Anyirékun F Somé
- Institut de Recherche en Sciences de la Santé, Direction Régionale de l'Ouest, Centre National de Recherche Scientifique et Technologique, Bobo-Dioulasso, Burkina Faso
| | - Cédric Pennetier
- MIVEGEC, University of Montpellier, IRD, CNRS, Montpellier, France
| | - Carlos J Chaccour
- ISGlobal, Barcelona Institute for Global Health, Barcelona, Spain; Centro de Investigación Biomédica en Red de Enfermedades Infecciosas, Madrid, Spain; Universidad de Navarra, Pamplona, Spain
| | - Roch K Dabiré
- Institut de Recherche en Sciences de la Santé, Direction Régionale de l'Ouest, Centre National de Recherche Scientifique et Technologique, Bobo-Dioulasso, Burkina Faso
| | - Karine Mouline
- MIVEGEC, University of Montpellier, IRD, CNRS, Montpellier, France
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Valldeperes M, Yerro PP, López-Olvera JR, Fandos P, Lavín S, Escofet RCS, Mentaberre G, León FJCM, Espinosa J, Ráez-Bravo A, Pérez JM, Tampach S, Estruch J, Velarde R, Granados JE. Diseases of Iberian ibex ( Capra pyrenaica). EUR J WILDLIFE RES 2023; 69:63. [PMID: 37274486 PMCID: PMC10233571 DOI: 10.1007/s10344-023-01684-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 02/03/2023] [Accepted: 05/02/2023] [Indexed: 06/06/2023]
Abstract
Iberian ibex (Capra pyrenaica) is an ecologically and economically relevant medium-sized emblematic mountain ungulate. Diseases participate in the population dynamics of the species as a regulating agent, but can also threaten the conservation and viability of vulnerable population units. Moreover, Iberian ibex can also be a carrier or even a reservoir of pathogens shared with domestic animals and/or humans, being therefore a concern for livestock and public health. The objective of this review is to compile the currently available knowledge on (1) diseases of Iberian ibex, presented according to their relevance on the health and demography of free-ranging populations; (2) diseases subjected to heath surveillance plans; (3) other diseases reported in the species; and (4) diseases with particular relevance in captive Iberian ibex populations. The systematic review of all the information on diseases affecting the species unveils unpublished reports, scientific communications in meetings, and scientific articles, allowing the first comprehensive compilation of Iberian ibex diseases. This review identifies the gaps in knowledge regarding pathogenesis, immune response, diagnostic methods, treatment, and management of diseases in Iberian ibex, providing a base for future research. Moreover, this challenges wildlife and livestock disease and wildlife population managers to assess the priorities and policies currently implemented in Iberian ibex health surveillance and monitoring and disease management.
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Affiliation(s)
- Marta Valldeperes
- Servei d’Ecopatologia de Fauna Salvatge (SEFaS), Universitat Autònoma de Barcelona, 08193 Barcelona, Bellaterra Spain
- Wildlife Ecology & Health Group (WE&H), Barcelona, Spain
| | - Paloma Prieto Yerro
- Parque Natural de las Sierras de Cazorla, Segura y Las Villas, C/ Martínez Falero 11, 23470 Cazorla Jaén, Spain
- Grupo de Investigación RNM 118. Biología de Especies Cinegéticas y Plagas, Jaén, Spain
| | - Jorge Ramón López-Olvera
- Servei d’Ecopatologia de Fauna Salvatge (SEFaS), Universitat Autònoma de Barcelona, 08193 Barcelona, Bellaterra Spain
- Wildlife Ecology & Health Group (WE&H), Barcelona, Spain
| | | | - Santiago Lavín
- Servei d’Ecopatologia de Fauna Salvatge (SEFaS), Universitat Autònoma de Barcelona, 08193 Barcelona, Bellaterra Spain
- Wildlife Ecology & Health Group (WE&H), Barcelona, Spain
| | | | - Gregorio Mentaberre
- Wildlife Ecology & Health Group (WE&H), Barcelona, Spain
- Departament de Ciència Animal, Universitat de Lleida, 25198 Lleida, Spain
| | | | - José Espinosa
- Departamento de Sanidad Animal, Facultad de Veterinaria and Instituto de Ganadería de Montaña (CSIC-ULE), Universidad de León, 24071 León, Spain
| | - Arián Ráez-Bravo
- Servei d’Ecopatologia de Fauna Salvatge (SEFaS), Universitat Autònoma de Barcelona, 08193 Barcelona, Bellaterra Spain
- Wildlife Ecology & Health Group (WE&H), Barcelona, Spain
| | - Jesús M. Pérez
- Wildlife Ecology & Health Group (WE&H), Barcelona, Spain
- Grupo de Investigación RNM 118. Biología de Especies Cinegéticas y Plagas, Jaén, Spain
- Department of Animal and Plant Biology, and Ecology, Jaén University, Campus Las Lagunillas, 23071 Jaén, Spain
| | - Stefania Tampach
- Servei d’Ecopatologia de Fauna Salvatge (SEFaS), Universitat Autònoma de Barcelona, 08193 Barcelona, Bellaterra Spain
- Wildlife Ecology & Health Group (WE&H), Barcelona, Spain
| | - Josep Estruch
- Servei d’Ecopatologia de Fauna Salvatge (SEFaS), Universitat Autònoma de Barcelona, 08193 Barcelona, Bellaterra Spain
- Wildlife Ecology & Health Group (WE&H), Barcelona, Spain
| | - Roser Velarde
- Servei d’Ecopatologia de Fauna Salvatge (SEFaS), Universitat Autònoma de Barcelona, 08193 Barcelona, Bellaterra Spain
- Wildlife Ecology & Health Group (WE&H), Barcelona, Spain
| | - José Enrique Granados
- Wildlife Ecology & Health Group (WE&H), Barcelona, Spain
- Grupo de Investigación RNM 118. Biología de Especies Cinegéticas y Plagas, Jaén, Spain
- Parque Nacional y Parque Natural de Sierra Nevada. Ctra., Antigua de Sierra Nevada Km 7, Pinos Genil, 18191 Granada, Spain
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10
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Takano K, de Hayr L, Carver S, Harvey RJ, Mounsey KE. Pharmacokinetic and pharmacodynamic considerations for treating sarcoptic mange with cross-relevance to Australian wildlife. Int J Parasitol Drugs Drug Resist 2023; 21:97-113. [PMID: 36906936 PMCID: PMC10023865 DOI: 10.1016/j.ijpddr.2023.02.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 02/15/2023] [Accepted: 02/20/2023] [Indexed: 03/07/2023]
Abstract
Sarcoptes scabiei is the microscopic burrowing mite responsible for sarcoptic mange, which is reported in approximately 150 mammalian species. In Australia, sarcoptic mange affects a number of native and introduced wildlife species, is particularly severe in bare-nosed wombats (Vombatus ursinus) and an emerging issue in koala and quenda. There are a variety of acaricides available for the treatment of sarcoptic mange which are generally effective in eliminating mites from humans and animals in captivity. In wild populations, effective treatment is challenging, and concerns exist regarding safety, efficacy and the potential emergence of acaricide resistance. There are risks where acaricides are used intensively or inadequately, which could adversely affect treatment success rates as well as animal welfare. While reviews on epidemiology, treatment strategies, and pathogenesis of sarcoptic mange in wildlife are available, there is currently no review evaluating the use of specific acaricides in the context of their pharmacokinetic and pharmacodynamic properties, and subsequent likelihood of emerging drug resistance, particularly for Australian wildlife. This review critically evaluates acaricides that have been utilised to treat sarcoptic mange in wildlife, including dosage forms and routes, pharmacokinetics, mode of action and efficacy. We also highlight the reports of resistance of S. scabiei to acaricides, including clinical and in vitro observations.
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Affiliation(s)
- Kotaro Takano
- School of Health, University of the Sunshine Coast, Maroochydore, Queensland, Australia; Sunshine Coast Health Institute, Birtinya, QLD, Australia
| | - Lachlan de Hayr
- School of Health, University of the Sunshine Coast, Maroochydore, Queensland, Australia; Sunshine Coast Health Institute, Birtinya, QLD, Australia
| | - Scott Carver
- Department of Biological Sciences, University of Tasmania, Hobart, Tasmania, Australia
| | - Robert J Harvey
- School of Health, University of the Sunshine Coast, Maroochydore, Queensland, Australia; Sunshine Coast Health Institute, Birtinya, QLD, Australia
| | - Kate E Mounsey
- School of Health, University of the Sunshine Coast, Maroochydore, Queensland, Australia; Sunshine Coast Health Institute, Birtinya, QLD, Australia.
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11
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Shen N, Wei W, Chen Y, Liu S, Xiong L, Xiao J, Gu X, Xie Y, Xu J, Jing B, Peng X, Yang G. Vaccination with a cocktail vaccine elicits significant protection against Sarcoptes scabiei in rabbits, whereas the multi-epitope vaccine offers limited protection. Exp Parasitol 2023; 245:108442. [PMID: 36509170 DOI: 10.1016/j.exppara.2022.108442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 11/23/2022] [Accepted: 12/08/2022] [Indexed: 12/13/2022]
Abstract
Sarcoptes scabiei cause scabies in humans or sarcoptic mange in animals. Currently, information regarding vaccines against S. scabiei is limited and no commercial vaccine is available. In present study, we expressed and mixed recombinant S. scabiei serpin (rSs-serpin), recombinant S. scabiei chitinase-like protein-5 [rSs-CLP5] and -12 [rSs-CLP12] as a cocktail vaccine (three proteins mixed), and also a multi-epitope protein derived from these three S. scabiei genes was expressed as a vaccine candidate to evaluate the effects of two vaccine strategies. Four test groups (n = 12 per group) and a control group (n = 12 per group) were involved in this vaccination trial. The results showed that 91.67% (11/12) and 83.33% (10/12) of rabbits exhibited no detectable skin lesions from S. scabiei infestation in cocktail vaccine groups, whereas two multi-epitope groups produced only a few rabbits (5/12, 6/12) having no detectable skin lesions. Four test groups displayed significant increases in specific IgG antibodies (Abs) and total IgE Abs after immunized with recombinant proteins. Taken together, our data demonstrated a mixture of rSs-serpin, rSs-CLP5 and rSs-CLP12 was a promising vaccine candidate that induced robust immune protection and could significantly decrease mite populations to reduce the direct transmission between rabbits. However, vaccination with the multi-epitope protein showed limited protection in rabbits.
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Affiliation(s)
- Nengxing Shen
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130, China
| | - Wenrui Wei
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130, China
| | - Yuhang Chen
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130, China; Mianyang Animal Disease Control Center, Mianyang, 621000, China
| | - Song Liu
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130, China
| | - Lang Xiong
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130, China
| | - Jie Xiao
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130, China
| | - Xiaobin Gu
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130, China
| | - Yue Xie
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130, China
| | - Jing Xu
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130, China
| | - Bo Jing
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130, China
| | - Xuerong Peng
- Department of Chemistry, College of Life and Basic Science, Sichuan Agricultural University, Wenjiang, 611130, China
| | - Guangyou Yang
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130, China.
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12
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Nishizawa T, Ishikawa K, Takamizawa M, Arioka H. Successful treatment of refractory crusted scabies. BMJ Case Rep 2022; 15:e251842. [PMID: 36357115 PMCID: PMC9660564 DOI: 10.1136/bcr-2022-251842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Toshinori Nishizawa
- Department of General Internal Medicine, St Luke's International Hospital, Tokyo, Japan
| | - Kazuhiro Ishikawa
- Division of Infectious Disease, St. Luke's International Hospital, Tokyo, Japan
| | - Mizuki Takamizawa
- Department of Dermatology, St Luke's International Hospital, Tokyo, Japan
| | - Hiroko Arioka
- Department of General Internal Medicine, St Luke's International Hospital, Tokyo, Japan
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13
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The Efficacy and Biopharmaceutical Properties of a Fixed-Dose Combination of Disulfiram and Benzyl Benzoate. Int J Mol Sci 2022; 23:ijms231810969. [PMID: 36142878 PMCID: PMC9502479 DOI: 10.3390/ijms231810969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 08/23/2022] [Accepted: 09/15/2022] [Indexed: 11/17/2022] Open
Abstract
Scabies and hair lice are parasitic diseases that affect human skin and hair, respectively. The incidence and resistances of these infections are increasing. Tenutex® (disulfiram and benzyl benzoate emulsion) is an alternative to standard insecticides to avoid resistances. The aim of the work is to evaluate the transdermal absorption and the in vitro efficacy against scabies and hair lice after different exposition times. Dermatomed human skin was used to assess the dermal absorption using a validated High Performance Liquid Chromatography (HPLC) method. HEK001 keratinocytes were used to evaluate the cytotoxicity of benzyl benzoate. Only benzyl benzoate was able to cross the skin, but it did not show cytotoxicity at any of the tested concentrations. The product efficacy was tested on Psoroptes ovis after direct contact and after administration on sheep skin explants at different contact times. Permethrin/malathion-resistant strains of Pediculus humanis capitis adults and eggs were directly exposed to Tenutex, and the vitality and hatchability, respectively, were evaluated. The anti-scabies study demonstrated that exposure for 6 or 24 h completely eradicated the parasite. The pediculicidal activity of Tenutex exhibited superior efficacy than standard treatment on resistant lice. The positive results obtained suggest that Tenutex® is a good treatment option, especially in drug resistance situations.
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14
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Khan A, Sohaib M, Ullah R, Hussain I, Niaz S, Malak N, de la Fuente J, Khan A, Aguilar-Marcelino L, Alanazi AD, Ben Said M. Structure-based in silico design and in vitro acaricidal activity assessment of Acacia nilotica and Psidium guajava extracts against Sarcoptes scabiei var. cuniculi. Parasitol Res 2022; 121:2901-2915. [PMID: 35972548 DOI: 10.1007/s00436-022-07615-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 07/31/2022] [Indexed: 12/01/2022]
Abstract
Infestation by Sarcoptes scabiei var. cuniculi mite causes scabies in humans and mange in animals. Alternative methods for developing environmentally friendly and effective plant-based acaricides are now a priority. The purpose of this research was the in silico design and in vitro evaluation of the efficacy of ethanol extracts of Acacia nilotica and Psidium guajava plant leaves against S. scabiei. Chem-Draw ultra-software (v. 12.0.2.1076.2010) was used to draw 36 distinct compounds from these plants that were employed as ligands in docking tests against S. scabiei Aspartic protease (SsAP). With docking scores of - 6.50993 and - 6.16359, respectively, clionasterol (PubChem CID 457801) and mangiferin (PubChem CID 5281647) from A. nilotica inhibited the targeted protein SsAP, while only beta-sitosterol (PubChem CID 222284) from P. guajava interacted with the SsAP active site with a docking score of - 6.20532. Mortality in contact bioassay at concentrations of 0.25, 0.5, 1.0, and 2.0 g/ml was determined to calculate median lethal time (LT50) and median lethal concentration (LC50) values. Acacia nilotica extract had an LC50 value of 0.218 g/ml compared to P. guajava extract, which had an LC50 value of 0.829 g/ml at 6 h. These results suggest that A. nilotica extract is more effective in killing mites, and these plants may have novel acaricidal properties against S. scabiei. Further research should focus on A. nilotica as a potential substitute for clinically available acaricides against resistant mites.
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Affiliation(s)
- Afshan Khan
- Department of Zoology, Abdul Wali Khan University Mardan, Mardan, Khyber Pakhtunkhwa, Pakistan
| | - Muhammad Sohaib
- Department of Zoology, Abdul Wali Khan University Mardan, Mardan, Khyber Pakhtunkhwa, Pakistan
| | - Rooh Ullah
- Department of Zoology, Abdul Wali Khan University Mardan, Mardan, Khyber Pakhtunkhwa, Pakistan
| | - Imdad Hussain
- Department of Zoology, Abdul Wali Khan University Mardan, Mardan, Khyber Pakhtunkhwa, Pakistan
| | - Sadaf Niaz
- Department of Zoology, Abdul Wali Khan University Mardan, Mardan, Khyber Pakhtunkhwa, Pakistan
| | - Nosheen Malak
- Department of Zoology, Abdul Wali Khan University Mardan, Mardan, Khyber Pakhtunkhwa, Pakistan
| | - José de la Fuente
- SaBio. Instituto de Investigación en Recursos Cinegéticos IREC-CSIC-UCLM-JCCM, Ronda de Toledo s/n, 13005, Ciudad Real, Spain.,Department of Veterinary Pathobiology, Center for Veterinary Health Sciences, Oklahoma State University, Stillwater, OK, 74078, USA
| | - Adil Khan
- Department of Zoology, Bacha Khan University Charsadda, Charsadda, Khyber Pakhtunkhwa, Pakistan.
| | - Liliana Aguilar-Marcelino
- National Center for Disciplinary Research in Animal Health and Safety (INIFAP), Km 11 Federal Road Cuernavaca-Cuautla, 62550, Jiutepec, Morelos, México
| | - Abdullah D Alanazi
- Department of Biological Sciences, Faculty of Science and Humanities, Shaqra University, 1040 Ad-Dawadimi, 11911, Shaqra, Saudi Arabia
| | - Mourad Ben Said
- Department of Basic Sciences, Higher Institute of Biotechnology of Sidi Thabet, University of Manouba, 2010, Manouba, Tunisia.,Laboratory of Microbiology, National School of Veterinary Medicine of Sidi Thabet, University of Manouba, 2010, Manouba, Tunisia
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15
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Antiparasitic Activity of Tea Tree Oil (TTO) and Its Components against Medically Important Ectoparasites: A Systematic Review. Pharmaceutics 2022; 14:pharmaceutics14081587. [PMID: 36015213 PMCID: PMC9416580 DOI: 10.3390/pharmaceutics14081587] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 07/14/2022] [Accepted: 07/22/2022] [Indexed: 12/04/2022] Open
Abstract
Ectoparasites are pathogens that can infect the skin and cause immense pain, discomfort, and disease. They are typically managed with insecticides. However, the fast-emerging antimicrobial resistance and the slow rate of development of new bio-actives combined with environmental and health concerns over the continued use of neurotoxic insecticides warrant newer and alternative methods of control. Tea tree oil (TTO), as an alternative agent, has shown remarkable promise against ectoparasites in recent studies. To our knowledge, this is the first systematic review to assess preclinical and clinical studies exploring the antiparasitic activity of TTO and its components against clinically significant ectoparasites, such as Demodex mites, scabies mites, house dust mites, lice, fleas, chiggers, and bed bugs. We systematically searched databases, including PubMed, MEDLINE (EBSCOhost), Embase (Scopus), CENTRAL, Cochrane Library, CINAHL, ScienceDirect, Web of Science, SciELO, and LILACS in any language from inception to 4 April 2022. Studies exploring the therapeutic activity of TTO and its components against the ectoparasites were eligible. We used the ToxRTool (Toxicological data reliability assessment) tool, the Joanna Briggs Institute (JBI) critical appraisal tools, and the Jadad scale to assess the methodological qualities of preclinical (in vitro and in vivo) studies, non-randomised controlled trials (including cohort, case series, and case studies), and randomised controlled trials, respectively. Of 497 identified records, 71 studies were included in this systematic review, and most (66%) had high methodological quality. The findings of this review revealed the promising efficacy of TTO and its components against ectoparasites of medical importance. Most importantly, the compelling in vitro activity of TTO against ectoparasites noted in this review seems to have translated well into the clinical environment. The promising outcomes observed in clinical studies provide enough evidence to justify the use of TTO in the pharmacotherapy of ectoparasitic infections.
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16
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Mange in Rabbits: An Ectoparasitic Disease with a Zoonotic Potential. Vet Med Int 2022; 2022:5506272. [PMID: 35880196 PMCID: PMC9308540 DOI: 10.1155/2022/5506272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 05/31/2022] [Accepted: 06/20/2022] [Indexed: 11/18/2022] Open
Abstract
Mange in rabbits is a very important parasitic disease causing high losses. The disease is caused mainly by Sarcoptes scabiei, Psoroptes cuniculi, Cheyletiella parasitovorax, and Notoedres cati. Body mange and ear mange are the most common forms of this disease in rabbits. Animals can get mite infestation through direct contact with infected animals or contaminated fomites. This infestation is characterized by zoonotic nature and public health burden. The skin affection is characterized by pruritus, alopecia, severe cachexia, and sometimes death. Infestation is diagnosed mainly by skin scraping and microscopic examination. Control measures mainly depend on the use of different types of systemic and topical acaricides and the use of natural products and supportive elements. Vaccine is not commercially available and is still under investigation. Accordingly, this review article was designed to shed the light on the mange disease in rabbits in terms of mite's infestation and susceptibility, clinical manifestations, zoonosis, diagnosis, and control strategies.
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17
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Andriantsoanirina V, Guillot J, Ratsimbason M, Mekhloufi G, Randriamialinoro F, Ranarivelo L, Ariey F, Durand R. In vitro efficacy of essential oils against Sarcoptes scabiei. Sci Rep 2022; 12:7176. [PMID: 35504935 PMCID: PMC9065015 DOI: 10.1038/s41598-022-11176-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 04/01/2022] [Indexed: 12/02/2022] Open
Abstract
The mite Sarcoptes scabiei is responsible for scabies, a pruritic and contagious skin disease in humans. S. scabiei is also responsible for mange in a wide range of animal species. The treatment of S. scabiei infection is hampered by an under-effectiveness of the few available drugs. The objective of this work was to evaluate the in vitro acaricide activity of a large number of plant essential oils (EOs) against S. scabiei. EOs were selected mainly on the basis of traditional treatments for dermatological infections in Madagascar. The sarcoptes originating from a porcine animal model were tested at concentrations ranging from 10 to 0.1%. The viability of sarcoptes was assessed by stereomicroscopic observation at 5 min, 15 min, 30 min, 45 min and then every hour until 6 h after treatment. Estimates of lethal time and lethal concentration producing 50% mortality were generated using a probit analysis. The survival curves were estimated using the Kaplan Meier method. A total of 31 EOs from different plants were tested. Cinnamomum zeylanicum (cinnamom) and Ocimum sanctum (tulsi) oils were the most active for all concentrations tested. They may be included in in vivo studies, in order to further assess their potential interest as topical treatments.
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Affiliation(s)
| | - Jacques Guillot
- EA 7380 Dynamic, Ecole Nationale Vétérinaire d'Alfort, UPEC, USC ANSES, Maisons-Alfort, France.,Dermatology Parasitology Mycology Dept, ONIRIS, Ecole Nationale Vétérinaire, Agroalimentaire et de l'Alimentation, 44300, Nantes, France
| | - Michel Ratsimbason
- Centre National d'Application de Recherches Pharmaceutiques, Tananarive, Madagascar
| | - Ghozlene Mekhloufi
- Institut Galien Paris-Saclay, CNRS, Université Paris-Saclay, 92290, Châtenay-Malabry, France
| | | | | | - Frédéric Ariey
- INSERM U1016, Institut Cochin, Laboratoire de Parasitologie-Mycologie, Hôpital Cochin, AP-HP, Université de Paris, Paris, France
| | - Rémy Durand
- Antiparasite Chemotherapy, BioCis, Université Paris Saclay, CNRS, 92290, Chatenay Malabry, France. .,Laboratoire de Parasitologie-Mycologie, Hôpital Henri Mondor, AP-HP, 1 rue Gustave Eiffel, 94000, Créteil, France.
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18
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Ruiz-May E, Álvarez-Sánchez ME, Aguilar-Tipacamú G, Elizalde-Contreras JM, Bojórquez-Velázquez E, Zamora-Briseño JA, Vázquez-Carrillo LI, López-Esparza A. Comparative proteome analysis of the midgut of Rhipicephalus microplus (Acari: Ixodidae) strains with contrasting resistance to ivermectin reveals the activation of proteins involved in the detoxification metabolism. J Proteomics 2022; 263:104618. [DOI: 10.1016/j.jprot.2022.104618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Revised: 05/09/2022] [Accepted: 05/14/2022] [Indexed: 11/15/2022]
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19
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Moroni B, Granados Torres JE, López-Olvera JR, Espinosa Cerrato J, Ráez Bravo A, Mentaberre G, Fandos P, Pazzi M, Romagnoli M, Gardini G, Rossi L, Valldeperes M, Serrano E, Ramos B, Odore R. Ivermectin Plasma Concentration in Iberian Ibex (Capra pyrenaica) Following Oral Administration: A Pilot Study. Front Vet Sci 2022; 9:830157. [PMID: 35433921 PMCID: PMC9011188 DOI: 10.3389/fvets.2022.830157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 03/09/2022] [Indexed: 11/16/2022] Open
Abstract
Sarcoptic mange is considered the main driver of demographic declines occurred in the last decades in Iberian ibex (Capra pyrenaica) populations. Mass treatment campaigns by administration of in-feed acaricides are used as a measure to mitigate the impact of mange in the affected populations. However, there are no data on ivermectin (IVM) pharmacokinetics in this wild caprine, and the treatment through medicated feed is not endorsed by evidence on its effectiveness. The aim of this study is to determine the pharmacokinetic profile of IVM in plasma samples of ibexes after the experimental oral administration of IVM, using high performance liquid chromatography (HPLC) with automated solid phase extraction and fluorescence detection. A dose of 500 μg of IVM per body weight was orally administered in a feed bolus to nine healthy adult ibexes (seven males and two females). Blood samples were collected by jugular venipuncture into heparin-coated tubes at day 1, 2, 3, 4, 7, 10, 15, and 45 post-administration (dpa). The highest plasma concentration of IVM (Cmax = 3.4 ng/ml) was detected 24 h after the oral administration (T1), followed by a rapid decrease during the first week post-administration. Our results reveal that plasma IVM concentration drops drastically within 5 days of ingestion, questioning the effectiveness of a single in-feed dose of this drug to control sarcoptic mange. To the best of our knowledge, this is the first study on plasma availability of oral IVM in ibexes and in any wild ungulate species.
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Affiliation(s)
- Barbara Moroni
- Department of Veterinary Sciences, University of Turin, Turin, Italy
- *Correspondence: Barbara Moroni
| | | | - Jorge Ramón López-Olvera
- Wildlife Ecology & Health Group (WE&H) and Servei d'Ecopatologia de Fauna Salvatge (SEFaS), Departament de Medicina i Cirurgia Animals, Facultat de Veterinària, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - José Espinosa Cerrato
- Departamento Sanidad Animal, Instituto de Ganadería de Montaña (CSIC-ULE), Facultad de Veterinaria, León, Spain
| | - Arián Ráez Bravo
- Wildlife Ecology & Health Group (WE&H) and Servei d'Ecopatologia de Fauna Salvatge (SEFaS), Departament de Medicina i Cirurgia Animals, Facultat de Veterinària, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Gregorio Mentaberre
- Wildlife Ecology & Health Group and Departament de Ciència Animal, Escola Tècnica Superior d'Enginyeria Agraria (ETSEA), Universitat de Lleida (UdL), Lleida, Spain
| | | | - Marco Pazzi
- Department of Chemistry, University of Turin, Turin, Italy
| | | | - Giulia Gardini
- Department of Veterinary Sciences, University of Turin, Turin, Italy
| | - Luca Rossi
- Department of Veterinary Sciences, University of Turin, Turin, Italy
| | - Marta Valldeperes
- Wildlife Ecology & Health Group (WE&H) and Servei d'Ecopatologia de Fauna Salvatge (SEFaS), Departament de Medicina i Cirurgia Animals, Facultat de Veterinària, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Emmanuel Serrano
- Wildlife Ecology & Health Group (WE&H) and Servei d'Ecopatologia de Fauna Salvatge (SEFaS), Departament de Medicina i Cirurgia Animals, Facultat de Veterinària, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Blanca Ramos
- Parque Nacional y Parque Natural de Sierra Nevada Carretera Antigua Sierra Nevada, Granada, Spain
| | - Rosangela Odore
- Department of Veterinary Sciences, University of Turin, Turin, Italy
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20
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Mounsey K, Harvey RJ, Wilkinson V, Takano K, Old J, Stannard H, Wicker L, Phalen D, Carver S. Drug dose and animal welfare: important considerations in the treatment of wildlife. Parasitol Res 2022; 121:1065-1071. [PMID: 35147771 PMCID: PMC8832083 DOI: 10.1007/s00436-022-07460-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Accepted: 02/01/2022] [Indexed: 10/25/2022]
Abstract
A recent publication in Parasitology Research by (Old et al. Parasitol Res 120:1077-1090, 2021) raises the topical and often controversial issue of the treatment of wildlife by personnel with little or no formal scientific training (e.g. wildlife carers). In a valuable contribution to the subject, Old and colleagues document a wide range of topical (pour-on) application doses and frequencies of moxidectin (Cydectin®) administered in situ to bare-nosed wombats (Vombatus ursinus) by members of the wildlife carer/treater community in southeast Australia to treat sarcoptic mange disease. This treatment occurred under minor use permits issued by the Australian Pesticides and Veterinary Management Authority (APVMA). These permits do not require veterinary supervision, although carers are registered and are expected to comply with the guidelines of this permit.The prevalence and severity of sarcoptic mange in wildlife is influenced by a variety of factors including mite biology, environmental conditions, population density, animal behaviour and immune susceptibility (Browne et al. Bioscience, 2021). In bare-nosed wombats, combinations of these elements play a substantial role in making the treatment of an already difficult disease more complex. (Moroni et al. Parasit Vectors 13:471, 2020) comment that any pharmacological treatment of free-ranging wildlife must consider these factors when assessing their feasibility and implications, especially in the context of emerging drug resistance and potential long-term ecological impacts. As individuals with significant interest in sarcoptic mange and representing a range of professional research and veterinary expertise, we see value in providing expert commentary on this issue.
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Affiliation(s)
- Kate Mounsey
- School of Health and Behavioural Sciences, University of the Sunshine Coast, Maroochydore, QLD, 4558, Australia. .,Sunshine Coast Health Institute, Birtinya, QLD, 4556, Australia.
| | - Robert J Harvey
- School of Health and Behavioural Sciences, University of the Sunshine Coast, Maroochydore, QLD, 4558, Australia.,Sunshine Coast Health Institute, Birtinya, QLD, 4556, Australia
| | - Victoria Wilkinson
- School of Natural Sciences, University of Tasmania, Hobart, TAS, 7005, Australia
| | - Kotaro Takano
- School of Health and Behavioural Sciences, University of the Sunshine Coast, Maroochydore, QLD, 4558, Australia.,Sunshine Coast Health Institute, Birtinya, QLD, 4556, Australia
| | - Julie Old
- School of Science, Western Sydney University, Hawkesbury campus, Penrith, NSW, 2751, Australia
| | - Hayley Stannard
- School of Agricultural, Environmental and Veterinary Sciences, Charles Sturt University, Wagga Wagga, NSW, 2678, Australia
| | - Leanne Wicker
- Wildlife Conservation and Science, Zoos Victoria, Parkville, VIC, 3052, Australia
| | - David Phalen
- Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, Sydney, NSW, 2006, Australia
| | - Scott Carver
- School of Natural Sciences, University of Tasmania, Hobart, TAS, 7005, Australia
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21
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Artchayasawat A, Boueroy P, Boonmars T, Pumhirunroj B, Sriraj P, Aukkanimart R, Boonjaraspinyo S, Pitaksakulrat O, Ratanasuwan P, Suwannatrai A, Eamudomkarn C, Laummaunwai P, Zhiliang W. Efficacy of Dipterocarpus alatus oil combination with Rhinacanthus nasutus leaf and Garcinia mangostana pericarps against canine demodicosis. Vet World 2021; 14:2919-2928. [PMID: 35017839 PMCID: PMC8743773 DOI: 10.14202/vetworld.2021.2919-2928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Accepted: 10/07/2021] [Indexed: 11/29/2022] Open
Abstract
Background and Aim: Canine demodicosis is a skin disease that is a major global health problem in dogs. Ivermectin is a drug of choice for treatment, but it may cause toxicity in dogs carrying multidrug resistance mutation-1 gene mutations. Hence, alternative herbal medicines are used instead of the drug, such as Dipterocarpus alatus oil (YN oil), Rhinacanthus nasutus leaf (WC), and Garcinia mangostana pericarps (MG) extracts. This study aimed to determine the efficacy of D. alatus oil, R. nasutus leaf, and G. mangostana pericarp extracts on canine demodicosis in vivo. Materials and Methods: Twenty-five mixed-breed dogs with localized demodicosis were examined. Dogs were diagnosed with demodicosis through deep skin scraping and screened with the inclusion criteria. Five dogs of each group were treated in five treatment groups (ivermectin, YN oil, YN oil+WC, YN oil+MG, and YN oil+WC+MG) for 1 month. The individual dogs were clinically evaluated, and the dermatological lesions were monitored daily for 60 days. Results: Dermatological lesion improvement was predominantly observed in the group of dogs treated with YN oil+WC. This was evidenced by the disappearance of the hyperpigmentation and lichenification on day 28 post-treatment and alopecia on day 56 post-treatment. Moreover, no allergic or clinical signs were observed during treatment. Conclusion: YN oil+WC is an alternative herbal medicine that could be used for the treatment of localized canine demodicosis.
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Affiliation(s)
- Atchara Artchayasawat
- Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand; Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Parichart Boueroy
- Department of Community Health, Faculty of Public Health, Kasetsart University Chalermphrakiat Sakon Nakhon Province Campus, Sakon Nakhon 47000, Thailand
| | - Thidarut Boonmars
- Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand; Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Benjamabhorn Pumhirunroj
- Program in Animal Science, Faculty of Agricultural Technology, Sakon Nakhon Rajabhat University, Sakon Nakhon 47000, Thailand
| | - Pranee Sriraj
- Department of Traditional Medicine, Faculty of Natural Resources, Rajamangala University of Technology ISAN Sakon Nakhon Campus, Sakon Nakhon 47160, Thailand
| | - Ratchadawan Aukkanimart
- Department of Traditional Medicine, Faculty of Natural Resources, Rajamangala University of Technology ISAN Sakon Nakhon Campus, Sakon Nakhon 47160, Thailand
| | - Sirintip Boonjaraspinyo
- Department of Community Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Opal Pitaksakulrat
- Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Panaratana Ratanasuwan
- Department of Anesthesiology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Apiporn Suwannatrai
- Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand; Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Chatanun Eamudomkarn
- Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand; Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Porntip Laummaunwai
- Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Wu Zhiliang
- Department of Parasitology, Gifu University School of medicine, Gifu 501-1194, Japan
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Abu Hafsa SH, Senbill H, Basyony MM, Hassan AA. Amelioration of Sarcoptic Mange-Induced Oxidative Stress and Growth Performance in Ivermectin-Treated Growing Rabbits Using Turmeric Extract Supplementation. Animals (Basel) 2021; 11:2984. [PMID: 34680003 PMCID: PMC8532694 DOI: 10.3390/ani11102984] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 10/08/2021] [Accepted: 10/13/2021] [Indexed: 12/05/2022] Open
Abstract
In this experiment, the protective effect of turmeric extract (TE) on side effects of Ivermectin-treated rabbits, while improving their performance, blood characteristics, and antioxidant status, was investigated. Sixty-three clinically Sarcoptes-infested rabbits aged 60 days were randomly allocated into three groups, with 21 rabbits in each group, to receive either no TE or TE supplementation (1 or 2 mg/kg diet) for 30 days after being subcutaneously injected with Ivermectin (IVM) 1% w/v at a dose of 0.2 mg/kg body weight twice a week. Another 21 healthy rabbits were used as the control. Treatment with IVM + 1 and 2 mg TE improved body weight (BW), body weight gain (BWG), feed intake (FI), and feed conversion ratio (FCR) in infested rabbits (p < 0.05). The IVM alone treatment had the highest mortality rate compared with the other treatments. Rabbits treated with IVM + 1 and 2 mg TE demonstrated progressive recovery manifested by improved nutrient digestibility and nitrogen balance. On day 7, the serum total protein, albumin, and albumin/globulin (A/G) ratio were significantly lower in the treated groups compared with the control group; also, the lowest values were observed in rabbits treated only with Ivermectin, followed by IVM + 1 and 2 mg TE. Treated rabbits had higher thiobarbituric acid reactive substance (TBAR) levels, but lower total antioxidant capacity (TAC), superoxidase dismutase (SOD), and glutathion peroxidase (GSH-Px) levels compared with the control group. On day 30 post-treatment, the rabbits in the IVM + 1 and 2 mg TE treatment groups showed progressive recovery manifested by improved biochemichal parameters, as well as a remarkable improvements in the oxidant/antioxidant balance towards normalcy (p < 0.05), and became comparable to that of the control compared with IVM alone treatment. In conclusion, turmeric extract improved rabbits' performance toward normalcy, and has remarkable antioxidant properties and can be used in conjunction with a miticide to treat sarcoptic mange in rabbits.
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Affiliation(s)
- Salma H. Abu Hafsa
- Livestock Research Department, Arid Lands Cultivation Research Institute, City of Scientific Research and Technological Applications, New Borg El-Arab, Alexandria 21934, Egypt
| | - Haytham Senbill
- Department of Applied Entomology and Zoology, Faculty of Agriculture, Alexandria University, Alexandria 21545, Egypt;
| | - Mohamed M. Basyony
- Agricultural Research Center, Animal Production Research Institute, Giza 12619, Egypt; (M.M.B.); (A.A.H.)
| | - Ayman A. Hassan
- Agricultural Research Center, Animal Production Research Institute, Giza 12619, Egypt; (M.M.B.); (A.A.H.)
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El-Moamly AA. Scabies as a part of the World Health Organization roadmap for neglected tropical diseases 2021-2030: what we know and what we need to do for global control. Trop Med Health 2021; 49:64. [PMID: 34399850 PMCID: PMC8366162 DOI: 10.1186/s41182-021-00348-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 07/05/2021] [Indexed: 01/02/2023] Open
Abstract
Background Scabies is an under-recognized global health problem with an unacceptably high prevalence in many settings worldwide. Fortunately, the World Health Organization (WHO) has formally designated scabies as a neglected tropical disease in 2017, in the hope of increasing awareness and encouraging efforts to eradicate it. Also, scabies has recently been included as part of the WHO roadmap for neglected tropical diseases 2021–2030, aimed at ending the neglect to attain the Sustainable Development Goals. Main abstract body This review article places scabies in focus. The literature was reviewed to explore discussions on controversial issues in scabies control, with the aim of clarifying whether global control of scabies is a feasible and worthwhile objective. The existing status of scabies and its burden are discussed along with future prospects for its global control. The article investigates the feasibility of scabies control and provides updates on the various impediments to this goal, such as challenges related to transmission, diagnosis, treatment, and vaccine development. Also examined are relevant research needs, success factors, and reasons for failure. This article aims to increase the global awareness of scabies and promote discussion, enhance coordinated international efforts, and ultimately, enact change at the national and worldwide levels toward the control of this preventable disease of the poor. Conclusion Despite the current challenges, scabies control is now within reach. With sustained interventions, continuous resources, and sincere commitment and support, scabies global control appears to be a worthwhile, realistic goal that is potentially achievable in the not so distant future.
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Affiliation(s)
- Amal A El-Moamly
- Department of Medical Parasitology, Faculty of Medicine, Suez Canal University, Round Road, Ismailia, Postal Code 41522, Egypt.
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24
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Direct acting anti-hepatitis C combinations as potential COVID-19 protease inhibitors. Virusdisease 2021; 32:279-285. [PMID: 33948452 PMCID: PMC8083918 DOI: 10.1007/s13337-021-00691-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 04/17/2021] [Indexed: 12/15/2022] Open
Abstract
The coronavirus pandemic could be the most threatening outbreak in the twenty-first century. According to the latest records of world health organization, more than 130 millions have been infected by COVID-19, with more than 2.9 million reported deaths. Yet, there is no magic cure for treatment of COVID-19. The concept of drug repurposing has been introduced as a fast, life-saving approach for drug discovery. Drug repurposing infers investigating already approved drugs for new indications, using the available information about pathophysiology of diseases and pharmacodynamics of drugs. In a recent work, more than 3000 FDA approved drugs were tested using virtual screening as potential antiviral agents for COVID-19. In this work, the top ranked five hits from the previous docking results together with drugs of similar chemical feature and/or mechanistic destinations were further tested using AutoDock Vina. The results showed that anti-HCV combinations could be potential therapeutic regimens for COVID-19 infections.
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25
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First Description of the Composition and the Functional Capabilities of the Skin Microbial Community Accompanying Severe Scabies Infestation in Humans. Microorganisms 2021; 9:microorganisms9050907. [PMID: 33922793 PMCID: PMC8146700 DOI: 10.3390/microorganisms9050907] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 04/13/2021] [Accepted: 04/20/2021] [Indexed: 12/16/2022] Open
Abstract
Epidemiological studies link Sarcoptes scabiei infection and impetigo. Scabies mites can promote Streptococcus pyogenes (Group A Streptococcus) and Staphylococcus aureus infections by breaching the skin barrier and excreting molecules that inhibit host innate immune responses. However, little is known about the composition and the function of the scabies-associated microbiota. Here, high-throughput whole-metagenome sequencing was used to explore the scabies-associated microbiome. Scabies mites including their immediate microenvironments were isolated from two patients with severe scabies in Northern Australia. Two ~45–50 million paired-end reads Illumina libraries were generated of which ~2 (5.1%) and 0.7 million (1.3%) microbial reads were filtered out by mapping to human (hg19) and mite draft genomes. Taxonomic profiling revealed a microbial community dominated by the phylum Firmicutes (A: 79% and B: 59%) and genera that comprise Streptococcus, Staphylococcus, Acinetobacter, and Corynebacterium. Assembly of the metagenome reads resulted in genome bins representing reference genomes of Acinetobacter baumannii, Streptococcus dysgalactiae (Group C/G), Proteus mirablis and Staphylococcus aureus. The contigs contained genes relevant to pathogenicity and antibiotics resistance. Confocal microscopy of a patient skin sample confirmed A. baumannii, Streptococci and S. aureus in scabies mite gut and faeces and the surrounding skin. The study provides fundamental evidence for the association of opportunistic pathogens with scabies infection.
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26
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PHARMACOKINETICS OF A SINGLE DOSE OF FLURALANER ADMINISTERED ORALLY TO AMERICAN BLACK BEARS ( URSUS AMERICANUS). J Zoo Wildl Med 2021; 51:691-695. [PMID: 33480547 DOI: 10.1638/2019-0200] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/31/2020] [Indexed: 11/21/2022] Open
Abstract
Sarcoptic mange continues to impact free-ranging mammal populations, including the American black bear (Ursus americanus). Administration of a single oral dose of fluralaner may be a viable treatment option for captive and free-ranging black bears affected by mange. This novel ectoparasitic in the isoxazoline class acts as an inhibitor of γ-aminobutyric acid (GABA)-gated chloride channels and l-glutamate-gated chloride channels (GluCls) and is commercially available in the United States as a flea and tick preventative medication for domestic dogs and cats. Pharmacokinetic parameters of fluralaner were evaluated in clinically healthy American black bear cubs (n = 10) administered a single oral dose of fluralaner at a targeted minimum dose of 25 mg/kg. Blood was collected at 24 hr and 7, 14, 21, 28, 35, 42, 49, 56, 63, and 70 days, and harvested plasma was analyzed for drug concentration using high-performance liquid chromatography. The average half-life (Ke t1/2) was determined to be 4.9 days, which is shorter than that published in domestic dogs. It was estimated that the average drug withdrawal time is approximately 64-72 days in this species.
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27
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Gordon CA, Shield JM, Bradbury RS, Muhi S, Page W, Judd JA, Lee R, Biggs BA, Ross K, Kurscheid J, Gray DJ, McManus DP. HTLV-I and Strongyloides in Australia: The worm lurking beneath. ADVANCES IN PARASITOLOGY 2021; 111:119-201. [PMID: 33482974 DOI: 10.1016/bs.apar.2020.11.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Strongyloidiasis and HTLV-I (human T-lymphotropic virus-1) are important infections that are endemic in many countries around the world with an estimated 370 million infected with Strongyloides stercoralis alone, and 5-10 million with HTVL-I. Co-infections with these pathogens are associated with significant morbidity and can be fatal. HTLV-I infects T-cells thus causing dysregulation of the immune system which has been linked to dissemination and hyperinfection of S. stercoralis leading to bacterial sepsis which can result in death. Both of these pathogens are endemic in Australia primarily in remote communities in Queensland, the Northern Territory, and Western Australia. Other cases in Australia have occurred in immigrants and refugees, returned travellers, and Australian Defence Force personnel. HTLV-I infection is lifelong with no known cure. Strongyloidiasis is a long-term chronic disease that can remain latent for decades, as shown by infections diagnosed in prisoners of war from World War II and the Vietnam War testing positive decades after they returned from these conflicts. This review aims to shed light on concomitant infections of HTLV-I with S. stercoralis primarily in Australia but in the global context as well.
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Affiliation(s)
- Catherine A Gordon
- Infectious Diseases Program, QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia.
| | - Jennifer M Shield
- Department of Pharmacy and Biomedical Sciences, La Trobe University, Bendigo, VIC, Australia; Department of Medicine, The Peter Doherty Institute for Infection and Immunity, University of Melbourne and the Royal Melbourne Hospital, Melbourne, VIC, Australia
| | - Richard S Bradbury
- School of Health and Life Sciences, Federation University, Berwick, VIC, Australia
| | - Stephen Muhi
- Victorian Infectious Diseases Service, The Royal Melbourne Hospital, Parkville, VIC, Australia
| | - Wendy Page
- College of Public Health, Medical and Veterinary Sciences, James Cook University, Townsville, QLD, Australia
| | - Jenni A Judd
- School of Health Medical and Applied Sciences, Central Queensland University, Bundaberg, QLD, Australia; Centre for Indigenous Health Equity Research, Central Queensland University, Bundaberg, QLD, Australia
| | - Rogan Lee
- Westmead Clinical School, The University of Sydney, Westmead, NSW, Australia
| | - Beverley-Ann Biggs
- Department of Medicine, The Peter Doherty Institute for Infection and Immunity, University of Melbourne and the Royal Melbourne Hospital, Melbourne, VIC, Australia; Victorian Infectious Diseases Service, The Royal Melbourne Hospital, Parkville, VIC, Australia
| | - Kirstin Ross
- College of Science and Engineering, Flinders University, Adelaide, South Australia, Australia
| | - Johanna Kurscheid
- Department of Global Health, Research School of Population Health, Australian National University, Acton, ACT, Australia
| | - Darren J Gray
- Department of Global Health, Research School of Population Health, Australian National University, Acton, ACT, Australia
| | - Donald P McManus
- Infectious Diseases Program, QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia
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Crusted scabies; a 2-year prospective study from the Northern Territory of Australia. PLoS Negl Trop Dis 2020; 14:e0008994. [PMID: 33338053 PMCID: PMC7781478 DOI: 10.1371/journal.pntd.0008994] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 01/04/2021] [Accepted: 11/19/2020] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Scabies is listed as a neglected tropical disease by the World Health Organization. Crusted scabies affects vulnerable and immunosuppressed individuals and is highly contagious because of the enormous number of Sarcoptes scabiei mites present in the hyperkeratotic skin. Undiagnosed and untreated crusted scabies cases can result in outbreaks of scabies in residential facilities and can also undermine the success of scabies mass drug administration programs. METHODS AND PRINCIPAL FINDINGS Crusted scabies became a formally notifiable disease in the Northern Territory of Australia in 2016. We conducted a 2-year prospective study of crusted scabies cases notified between March 2016 and February 2018, with subsequent follow up for 22 months. Demographics, clinical and laboratory data, treatment and outcomes were analysed, with cases classified by severity of disease. Over the 2-year study period, 80 patients had 92 episodes of crusted scabies; 35 (38%) were Grade 1 crusted scabies, 36 (39%) Grade 2 and 21 (23%) Grade 3. Median age was 47 years, 47 (59%) were female, 76 (95%) Indigenous Australians and 57 (71%) from remote Indigenous communities. Half the patients were diabetic and 18 (23%) were on dialysis for end-stage kidney failure. Thirteen (16%) patients had no comorbidities, and these were more likely to have Grade 3 disease. Eosinophilia was present in 60% and high immunoglobulin E in 94%. Bacteremia occurred in 11 episodes resulting in one fatality with methicillin-susceptible Staphylococcus aureus bacteremia. Two other deaths occurred during admission and 10 others died subsequent to discharge consequent to comorbidities. Treatment generally followed the recommended guidelines, with 3, 5 or 7 doses of oral ivermectin depending on the documented grade of crusted scabies, together with daily alternating topical scabicides and topical keratolytic cream. While response to this therapy was usually excellent, there were 33 episodes of recurrent crusted scabies with the majority attributed to new infection subsequent to return to a scabies-endemic community. CONCLUSIONS Crusted scabies can be successfully treated with aggressive guideline-based therapy, but high mortality remains from underlying comorbidities. Reinfection on return to community is common while scabies remains endemic.
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29
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Naz S, Ahmad S, Walton S, Abbasi SW. Multi-epitope based vaccine design against Sarcoptes scabiei paramyosin using immunoinformatics approach. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.114105] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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30
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Abstract
Sarcoptes scabiei is a causative organism for scabies that affects an estimated global population of 300 million and remains a disease of significant concern. Recently, a number of potential drug targets were identified for scabies, including hydrolytic enzymes, inactivated paralogues of hydrolytic enzymes, inhibitors of host proteolytic enzymes and other proteins of interest. These discoveries remain confined to academic laboratories and institutions, failing to attract interest from researchers in commercial drug development. Here, we summarize the latest developments in the scabies mite biology and the drug targets that were subsequently identified, and we propose several peptide and nonpeptide ligands targeting the hot spots for protein-protein interactions. We also identify gaps in the development of ligands as inhibitors or modulators of these macromolecules.
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31
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Nwufoh OC, Sadiq NA, Fagbohun O, Adebiyi A, Adeshina R, Emmanuel E, Emikpe BO. Molecular detection and characterization of Sarcoptes scabiei var canis using skin scrapings and skin biopsies. J Parasit Dis 2020; 45:258-262. [PMID: 33746412 DOI: 10.1007/s12639-020-01304-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Accepted: 10/27/2020] [Indexed: 11/30/2022] Open
Abstract
Canine sarcopticosis is a highly infectious and debilitating parasitic skin disease of dogs. Its diagnosis stands challenging as the golden standard of diagnosis; skin scraping microscopy is characterized by several diagnostic variations. Study thus employed several alternate diagnostic approaches using Polymerase Chain Reaction (PCR) on skin scrapings and skin biopsies. Whole Sarcoptes scabiei var canis mites, thirty six "3 cm × 3cm" skin scrapings and 3 mm punch biopsies from six different lesioned sites per infested dog were all obtained from six severely sarcoptes ridden dogs. Samples were mechanically disrupted for DNA extraction and amplification. Positive samples were further commercially sequenced. Amongst the thirty six (36) skin biopsy and scraping samples processed, PCR detected the DNA of Sarcoptes scabiei var canis in thirty two (32) skin biopsy samples with a sensitivity of 88.88%. Twenty five (25) skin scraping samples were also positive for scabies with a sensitivity of 69.44%. The Phylogenetic analysis revealed a relationship between the Sarcoptes scabiei var canis mites from Nigeria and Sarcoptes scabiei of humans, raccoon dogs and rabbits in Pakistan, Japan and Egypt. The diagnostic errors and false negatives accompanying the skin microscopy diagnostic technique can best be limited with the use of PCR diagnosis on skin scrapings and skin biopsies most especially. This highly sensitive diagnostic tool would certainly and effectively control the menace of sarcopticosis in dogs.
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Affiliation(s)
- Onyeka Chidiebele Nwufoh
- Department of Veterinary Parasitology, University of Ibadan, Ibadan, Nigeria.,Federal College of Animal Health and Production Technology, Ibadan, Nigeria
| | | | - Olusegun Fagbohun
- Department of Veterinary Microbiology, University of Ibadan, Ibadan, Nigeria
| | - Adebowale Adebiyi
- Department of Veterinary Microbiology, University of Ibadan, Ibadan, Nigeria
| | - Rofiat Adeshina
- Department of Veterinary Microbiology, University of Ibadan, Ibadan, Nigeria
| | - Ekeanyanwu Emmanuel
- Department of Veterinary Microbiology, University of Ibadan, Ibadan, Nigeria
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32
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Moroni B, Valldeperes M, Serrano E, López-Olvera JR, Lavín S, Rossi L. Comment on: "The treatment of sarcoptic mange in wildlife: a systematic review". Parasit Vectors 2020; 13:471. [PMID: 32933573 PMCID: PMC7491160 DOI: 10.1186/s13071-020-04347-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 09/05/2020] [Indexed: 11/10/2022] Open
Abstract
This letter comments on the article “The treatment of sarcoptic mange in wildlife: a systematic review” published in Parasites & Vectors 2019, 12:99, and discusses the limitations in the use of endectocides for scabies control in free-ranging wildlife. The ecological impact and drug resistance to ivermectin are also discussed. In our view, scabies control in free-ranging wildlife should be based preferably on population management measures, and whether to apply individual treatments to free-ranging populations should be considered very carefully and avoided where not absolutely warranted.
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Affiliation(s)
- Barbara Moroni
- Dipartimento di Scienze Veterinarie, Universitá di Torino, Grugliasco, Torino, Italy
| | - Marta Valldeperes
- Wildlife Ecology & Health group (WE&H), and Serveid'Ecopatologia de Fauna Salvatge (SEFaS), Departament de Medicina i Cirurgia Animals, Universitat Autònoma de Barcelona (UAB), Bellaterra, Spain
| | - Emmanuel Serrano
- Wildlife Ecology & Health group (WE&H), and Serveid'Ecopatologia de Fauna Salvatge (SEFaS), Departament de Medicina i Cirurgia Animals, Universitat Autònoma de Barcelona (UAB), Bellaterra, Spain
| | - Jorge Ramón López-Olvera
- Wildlife Ecology & Health group (WE&H), and Serveid'Ecopatologia de Fauna Salvatge (SEFaS), Departament de Medicina i Cirurgia Animals, Universitat Autònoma de Barcelona (UAB), Bellaterra, Spain
| | - Santiago Lavín
- Wildlife Ecology & Health group (WE&H), and Serveid'Ecopatologia de Fauna Salvatge (SEFaS), Departament de Medicina i Cirurgia Animals, Universitat Autònoma de Barcelona (UAB), Bellaterra, Spain
| | - Luca Rossi
- Dipartimento di Scienze Veterinarie, Universitá di Torino, Grugliasco, Torino, Italy.
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Smith JS, Berger DJ, Hoff SE, Jesudoss Chelladurai JRJ, Martin KA, Brewer MT. Afoxolaner as a Treatment for a Novel Sarcoptes scabiei Infestation in a Juvenile Potbelly Pig. Front Vet Sci 2020; 7:473. [PMID: 33102538 PMCID: PMC7505946 DOI: 10.3389/fvets.2020.00473] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 06/25/2020] [Indexed: 01/29/2023] Open
Abstract
A 2 months old female Vietnamese potbellied pig presented to a veterinary teaching hospital with a referring complaint of pruritus. A human caretaker of the pig had recently been diagnosed with a Sarcoptes spp. dermatitis. Microscopic examination of the skin scrape samples and BLAST analysis confirmed the species of the mite as most closely related to Sarcoptes scabiei var. canis (AY493391). The pig was treated with afoxolaner as previous treatment with ivermectin was not efficacious. Recheck examinations and follow up revealed the pig to be non-pruritic and resolving. Afoxolaner may be a therapeutic option when treating Sarcoptes spp. infections in companion pigs.
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Affiliation(s)
- Joe S Smith
- Food Animal and Camelid Hospital, Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA, United States.,Systems Modelling and Reverse Translational Pharmacology, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
| | - Darren J Berger
- Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
| | - Sarah E Hoff
- Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
| | | | - Katy A Martin
- Department of Veterinary Pathology, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
| | - Matthew T Brewer
- Department of Veterinary Pathology, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
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Sharaf M, Antonios S, Mina S, Eliwa K, Rayia DA. The scabicide effect of moxidectin in vitro and in experimental animals: Parasitological, histopathological and immunological evaluation. Exp Parasitol 2020; 217:107961. [PMID: 32777223 DOI: 10.1016/j.exppara.2020.107961] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Revised: 07/07/2020] [Accepted: 07/24/2020] [Indexed: 10/23/2022]
Abstract
Scabies is considered one of the commonest dermatological diseases that has a global health burden. Current treatment with ivermectin (IVM) is insufficient and potential drug resistance was noticed. Moxidectin (MOX), with a better pharmacological profile may be a promising alternative. The efficacy of moxidectin against Sarcoptes scabiei was assessed both in vitro and in vivo in comparison with ivermectin. For the in vitro assay, both drugs were used in two concentrations (50 μg/ml and 100 μg/ml). For the in vivo assay, twenty rabbits infected with Sarcoptes scabiei were divided into three groups: untreated, moxidectin-treated and ivermectin-treated with the same dose of 0.3 mg/kg once. Another four rabbits were used as a normal control non-infected group. Treatment efficacy was evaluated by clinical assessment, parasitological evaluation and histopathological examination of skin samples using Hematoxylin and eosin and toluidine blue for mast cell staining. Immune response was also assessed by immunohistochemical staining of CD3 T cells in skin samples. Our results showed that moxidectin had a high efficacy (100%) in killing mites when used in both concentrations (50 μg/ml, 100 μg/ml) in the in vitro assay. Concerning the in vivo assay, on day 14 post-treatment, all MOX-treated rabbits were mite-free with full clinical cure by the end of the study (D21) showing (100%) reduction of mites count. Also, marked improvement in the epidermis with absence of mites in skin samples were shown. Poor clinical and parasitological improvements were noted in the ivermectin-treated rabbits, when given as a single dose with a percentage reduction (60.67%) in the 2nd week and progressive increase in lesions and mites count in the 3rd week post-treatment. Regarding the immune response, MOX-treated group showed mild infiltration with both mast cells and CD3 T cells in comparison to severe infiltration with both types of cells in the untreated and IVM-treated group. On conclusion, our results demonstrated that a single dose of MOX was more effective than IVM, supporting MOX as a valuable therapeutic approach for scabies therapy.
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Affiliation(s)
- Mahmoud Sharaf
- Parasitology Department, Faculty of Medicine, Tanta University, Egypt
| | - Sanaa Antonios
- Parasitology Department, Faculty of Medicine, Tanta University, Egypt
| | - Samir Mina
- Histopathology Department, Faculty of Medicine, Tanta University, Egypt
| | - Kamal Eliwa
- Parasitology Department, Faculty of Medicine, Tanta University, Egypt
| | - Dina Abou Rayia
- Parasitology Department, Faculty of Medicine, Tanta University, Egypt.
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Agyei M, Ofori A, Tannor EK, Annan JJ, Norman BR. A forgotten parasitic infestation in an immunocompromised patient-a case report of crusted scabies. Pan Afr Med J 2020; 36:238. [PMID: 33708329 PMCID: PMC7908331 DOI: 10.11604/pamj.2020.36.238.24288] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Accepted: 06/23/2020] [Indexed: 11/25/2022] Open
Abstract
Crusted scabies is a rare and highly contagious form of Sarcoptes scabiei var hominis infestation whose incidence may increase in the near future due to increasing use of immunosuppressive therapies and a general lack of awareness about the condition. It is misdiagnosed as psoriasis, irritant dermatitis or eczema. Delays in diagnosis lead to widespread transmission amongst contacts leading to potential community outbreak. Crusted scabies is extremely difficult to treat and there are growing concerns of possible resistance to current treatment. This case report describes a 44-year-old Ghanaian woman with human immunodeficiency virus (HIV) infection and diagnosed with skin scrapings. Treatment was initiated but the patient died from HIV related complications. Crusted scabies, though rare, should be an issue of global concern due to the potential for widespread dissemination. Adequate resources need to be channeled into scabies eradication as well as education of health personnel to promptly identify and treat cases.
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Affiliation(s)
- Martin Agyei
- Dermatology Unit, Department of Medicine, School of Medicine and Dentistry, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Afua Ofori
- Department of Medicine, Komfo Anokye Teaching Hospital, Kumasi, Ghana
| | | | - John Jude Annan
- Department of Obstetrics and Gynaecology, School of Medicine and Dentistry, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Betty Roberta Norman
- Dermatology Unit, Department of Medicine, School of Medicine and Dentistry, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
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Lee-Chow B, Eshar D. Diagnostic challenge: Generalized erythema and pruritus in a miniature pot-bellied pig (Sus scrofa). J Exot Pet Med 2020. [DOI: 10.1053/j.jepm.2020.04.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Felmingham C, Tilakaratne D. Overdiagnosis of scabies and overprescribing of scabies treatment in a scabies-endemic region. Aust J Rural Health 2020; 28:394-398. [PMID: 32578330 DOI: 10.1111/ajr.12636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 01/13/2020] [Accepted: 05/03/2020] [Indexed: 11/29/2022] Open
Abstract
OBJECTIVE To assess the objective evidence upon which diagnosis of scabies and subsequent prescription of permethrin cream or oral ivermectin is based at a tertiary referral hospital in the Northern Territory. DESIGN, SETTING AND PARTICIPANTS A retrospective cohort study of inpatients who were prescribed permethrin or ivermectin between July and September 2017 at a single tertiary referral hospital. Eighty-eight inpatient admissions, belonging to 77 unique patients, were included. This list was generated with the hospital's electronic prescribing software. MAIN OUTCOME MEASURES Age, ethnicity, skin diagnosis on admission, which anti-scabies medications were prescribed, which concurrent medications were prescribed to treat a rash or pruritus, which differential or concurrent skin diagnoses were made, whether the dermatology department had seen the patient during their admission, and what evidence was documented as reason for diagnosis of scabies. RESULTS In the cases in which scabies treatment was prescribed, less than one quarter had positive skin scrapings for scabies, and few had documentation of burrows, and documentation of a contact history combined with clinical lesions. Most cases met none of these diagnostic criteria. Very few were reviewed by the dermatology department as an inpatient. CONCLUSIONS There were likely high rates of diagnostic uncertainty among the cases in which scabies treatment was prescribed. It is possible that anti-scabies medications are being prescribed empirically in this hospital.
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[Increase of scabies and therapy resistance among German military personnel : An 8-year follow-up study in the Department of Dermatology of the Armed Forces Hospital Berlin, Germany (2012-2019)]. Hautarzt 2020; 71:447-454. [PMID: 32430543 DOI: 10.1007/s00105-020-04608-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND The diagnosis of scabies has become surprisingly frequent in Germany in recent years and the use of scabicides has risen significantly. OBJECTIVE The aim of our survey was to determine whether this trend can also be detected among military personnel of the German Armed Forces (Bundeswehr). METHODS The study was conducted as a retrospective single-center study over a period of 8 years from 2012 to 2019 in the Department of Dermatology of the Armed Forces Hospital Berlin, Germany. Data were generated from the hospital information system (KIS), which was searched for all scabies-coded diagnoses according to ICD10 code B86 both as outpatients and inpatients. Only first presentations with scabies diagnosis confirmed by dermoscopy or microscopy by a dermatologist were included. Inpatient treatment was required if a patient was not cured after at least three antiscabies treatment cycles in the outpatient setting. RESULTS The data show that there has been a steady increase in the diagnosis of scabies in Bundeswehr personnel. Moreover, our data show that the number of unsuccessfully treated outpatients increased and required in-hospital treatment. CONCLUSION We observed an increase of scabies among German military personnel who represent a typical at-risk group. These results support the observations of an increased incidence of scabies in Germany in general and especially in an at-risk population. With the general increase in scabies cases, there are also increasing numbers of German military personnel who are refractory to treatment, which was largely attributed to inadequate treatment of contact persons and individual treatment errors. Nevertheless, the data also emphasize the low overall prevalence of scabies; therefore, all diagnoses should be confirmed by dermoscopy or microscopy after 14 days whenever possible to rule out the bias of overreporting due to false-positive cases diagnosed only by clinical examination.
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In Vitro Activity of Beauvericin against All Developmental Stages of Sarcoptes scabiei. Antimicrob Agents Chemother 2020; 64:AAC.02118-19. [PMID: 32122897 DOI: 10.1128/aac.02118-19] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2019] [Accepted: 02/23/2020] [Indexed: 12/22/2022] Open
Abstract
Scabies is a frequent cutaneous infection caused by the mite Sarcoptes scabiei in a large number of mammals, including humans. As the resistance of S. scabiei against several chemical acaricides has been previously documented, the establishment of alternative and effective control molecules is required. In this study, the potential acaricidal activity of beauvericin was assessed against different life stages of S. scabiei var. suis and in comparison with dimpylate and ivermectin, two commercially available molecules used for the treatment of S. scabiei infection in animals and/or humans. The toxicity of beauvericin against cultured human fibroblast skin cells was evaluated using an MTT proliferation assay. In our in vitro model, developmental stages of S. scabiei were placed in petri dishes filled with Columbia agar supplemented with pig serum and different concentrations of the drugs. Cell sensitivity assays demonstrated low toxicity of beauvericin against primary human fibroblast skin cells. At 0.5 and 5 mM, beauvericin showed higher activity against adults and eggs of S. scabiei compared to dimpylate and ivermectin. These results revealed that the use of beauvericin is promising and might be considered for the treatment of S. scabiei infection.
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Shen N, Wei W, Chen Y, Ren Y, Xiong L, Tao Y, Gu X, Xie Y, Peng X, Yang G. An Antibody Persistent and Protective Two rSsCLP-Based Subunit Cocktail Vaccine against Sarcoptes scabiei in a Rabbit Model. Vaccines (Basel) 2020; 8:vaccines8010129. [PMID: 32187979 PMCID: PMC7157647 DOI: 10.3390/vaccines8010129] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 03/09/2020] [Accepted: 03/12/2020] [Indexed: 11/16/2022] Open
Abstract
Scabies is a highly contagious disease caused by Sarcoptes scabiei which burrows into stratum corneum of host's skin. In this study, after optimizing vaccination schedule, a vaccination trial is comprised of three test groups of rabbits (n = 10/group) by immunization with (1) rSsCLP5; (2) rSsCLP12; or (3) a mixture of rSsCLP5 and rSsCLP12, three biological replicates groups (n = 10/group) and three control groups (n = 10/group). Levels of specific IgG, total IgE and cytokines in sera were detected and histopathologically analyzed as indicators of vaccine effects. The results showed that 85% (17/20) of rabbits exhibited no detectable skin lesions of S. scabiei infestation in mixed protein groups compared to single protein groups with 75% (15/20) and 70% (14/20), respectively. Moreover, the deworming rates of mixed groups are increased by 10%-20% compared with that of single groups. Each of six groups immunized with rSsCLP displayed significant increases of specific IgG, total IgE, IL-10, and TNF-α. The degree of skin damage in test groups also significantly lower than that of control groups. Thus, purified rSsCLP5 and rSsCLP12 subunit cocktail vaccine induced robust immune protection and could significantly decrease mite populations to reduce the direct transmission between rabbits.
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Affiliation(s)
- Nengxing Shen
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang 611130, China; (N.S.); (W.W.); (Y.C.); (L.X.); (Y.T.); (X.G.); (Y.X.)
| | - Wenrui Wei
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang 611130, China; (N.S.); (W.W.); (Y.C.); (L.X.); (Y.T.); (X.G.); (Y.X.)
| | - Yuhang Chen
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang 611130, China; (N.S.); (W.W.); (Y.C.); (L.X.); (Y.T.); (X.G.); (Y.X.)
| | - Yongjun Ren
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Chengdu 610066, Sichuan, China;
| | - Lang Xiong
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang 611130, China; (N.S.); (W.W.); (Y.C.); (L.X.); (Y.T.); (X.G.); (Y.X.)
| | - Yuanyuan Tao
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang 611130, China; (N.S.); (W.W.); (Y.C.); (L.X.); (Y.T.); (X.G.); (Y.X.)
| | - Xiaobin Gu
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang 611130, China; (N.S.); (W.W.); (Y.C.); (L.X.); (Y.T.); (X.G.); (Y.X.)
| | - Yue Xie
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang 611130, China; (N.S.); (W.W.); (Y.C.); (L.X.); (Y.T.); (X.G.); (Y.X.)
| | - Xuerong Peng
- Department of Chemistry, College of Life and Basic Science, Sichuan Agricultural University, Wenjiang 611130, China;
| | - Guangyou Yang
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang 611130, China; (N.S.); (W.W.); (Y.C.); (L.X.); (Y.T.); (X.G.); (Y.X.)
- Correspondence:
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Efficacy of Ivermectin, Liquid Paraffin, and Carbaryl against Mange of Farmed Rabbits in Central Kenya. J Trop Med 2019; 2019:5092845. [PMID: 31885634 PMCID: PMC6900945 DOI: 10.1155/2019/5092845] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Accepted: 11/13/2019] [Indexed: 11/29/2022] Open
Abstract
Mange is a common disease of rabbits globally, and knowledge of efficacy of drugs used in its treatment is critical for effective disease control. The current study evaluated the efficacy of three commonly used therapeutic agents in Kenya against mange. In a controlled laboratory trial, 20 adult rabbits were recruited for the study (16 of which were infested with mange, while 4 were mange-free). The 16 mange-infested rabbits were randomly allocated into 4 treatment groups each consisting of 4 rabbits, while 4 mange-free rabbits formed the negative control group. Treatments were administered as follows: group 1 (G1) received two ivermectin injections at an interval of 14 days, group 2 (G2) was treated with a combination of carbaryl and liquid paraffin applied every other day up to the end of the experiment, group 3 (G3) was treated with liquid paraffin droplets applied daily until the lesion cleared, while group 4 (G4, infected-untreated) received distilled water applied topically on their ears and group 5 (G5, uninfected-untreated negative control) was not treated with any preparation. The lesions were scored and sampled daily to check the viability of the mites. A field efficacy trial of the test compounds was performed using 105 mange-infested rabbits. The results revealed that all the test agents: ivermectin, liquid paraffin, carbaryl-water, and carbaryl-liquid paraffin combination were effective against mange, recording the lesion score of zero for psoroptic mange by day 21 in the laboratory and field trials. Lesion scores in the treated groups were significantly reduced (p < 0.05) at the termination of study compared with those of the positive control group in the laboratory trial. A point-biserial correlation revealed a strong association (rpb = 0.79, p < 0.05) between the presence of viable mites and degree of psoroptic lesions in the field trial.
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Abstract
Scabies, an ectoparasitic infestation of the skin by the mite Sarcoptes scabiei, is a clinical problem of particular significance in the elderly population because of unique vulnerability factors. Such factors include reduced mobility, residency in grouped living facilities, and difficulty with implementation of certain treatments. There is also risk of transmission to nearby caretakers and cohabitants. Furthermore, the diagnosis of scabies can be difficult, as this condition can closely resemble other dermatologic diseases. Complicating the diagnosis in this group is the variety of medical settings in which these patients are evaluated, some of which may not be equipped to follow diagnostic guidelines. The diagnosis itself can be complex because of varying clinical presentation and mite burden. Finally, the transmissibility of scabies, especially in grouped living arrangements, makes prompt and proper treatment of this condition paramount. All of these factors present a unique challenge for the clinician treating elderly patients. This article aims to describe the susceptibility factors, clinical presentation, diagnosis, and management considerations specific to elderly adults with scabies.
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Affiliation(s)
- Jodi Raffi
- Department of Dermatology, University of California San Francisco, Divisadero St. 1701, San Francisco, CA, 94110, USA
- School of Medicine, University of California Irvine, 1001 Health Sciences Road, Irvine, CA, 92617, USA
| | - Raagini Suresh
- Department of Dermatology, University of California San Francisco, Divisadero St. 1701, San Francisco, CA, 94110, USA
| | - Daniel C Butler
- Department of Dermatology, University of California San Francisco, Divisadero St. 1701, San Francisco, CA, 94110, USA.
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Niedringhaus KD, Brown JD, Sweeley KM, Yabsley MJ. A review of sarcoptic mange in North American wildlife. Int J Parasitol Parasites Wildl 2019; 9:285-297. [PMID: 31304085 PMCID: PMC6599944 DOI: 10.1016/j.ijppaw.2019.06.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 06/05/2019] [Accepted: 06/06/2019] [Indexed: 01/27/2023]
Abstract
The "itch mite" or "mange mite", Sarcoptes scabiei, causes scabies in humans and sarcoptic mange in domestic and free-ranging animals. This mite has a wide host range due to its ability to adapt to new hosts and has been spread across the globe presumably through human expansion. While disease caused by S. scabiei has been very well-studied in humans and domestic animals, there are still numerous gaps in our understanding of this pathogen in free-ranging wildlife. The literature on sarcoptic mange in North American wildlife is particularly limited, which may be due to the relatively limited number of clinically-affected species and lack of severe population impacts seen in other continents. This review article provides a summary of the current knowledge of mange in wildlife, with a focus on the most common clinically-affected species in North America including red foxes (Vulpes vulpes), gray wolves (Canis lupus), coyotes (Canis latrans), and American black bears (Ursus americanus).
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Affiliation(s)
- Kevin D. Niedringhaus
- Southeastern Cooperative Wildlife Disease Study, 589 D.W. Brooks Drive, Wildlife Health Building, College of Veterinary Medicine, University of Georgia, Athens, GA, 30602, USA
| | - Justin D. Brown
- Department of Veterinary and Biomedical Sciences, 115 Henning Building, Pennsylvania State University, University Park, PA, 16802, USA
| | - Kellyn M. Sweeley
- College of Veterinary Medicine, 501 D.W. Brooks Drive, University of Georgia, Athens, GA, 30602, USA
| | - Michael J. Yabsley
- Southeastern Cooperative Wildlife Disease Study, 589 D.W. Brooks Drive, Wildlife Health Building, College of Veterinary Medicine, University of Georgia, Athens, GA, 30602, USA
- Warnell School of Forestry and Natural Resources, 180 E Green Street, University of Georgia, Athens, GA, 30602, USA
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Sharun K, Shyamkumar TS, Aneesha VA, Dhama K, Pawde AM, Pal A. Current therapeutic applications and pharmacokinetic modulations of ivermectin. Vet World 2019; 12:1204-1211. [PMID: 31641298 PMCID: PMC6755388 DOI: 10.14202/vetworld.2019.1204-1211] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Accepted: 06/29/2019] [Indexed: 12/22/2022] Open
Abstract
Ivermectin is considered to be a wonder drug due to its broad-spectrum antiparasitic activity against both ectoparasites and endoparasites (under class of endectocide) and has multiple applications in both veterinary and human medicine. In particular, ivermectin is commonly used in the treatment of different kinds of infections and infestations. By altering the vehicles used in the formulations, the pharmacokinetic properties of different ivermectin preparations can be altered. Since its development, various vehicles have been evaluated to assess the efficacy, safety, and therapeutic systemic concentrations of ivermectin in different species. A subcutaneous route of administration is preferred over a topical or an oral route for ivermectin due to superior bioavailability. Different formulations of ivermectin have been developed over the years, such as stabilized aqueous formulations, osmotic pumps, controlled release capsules, silicone carriers, zein microspheres, biodegradable microparticulate drug delivery systems, lipid nanocapsules, solid lipid nanoparticles, sustained-release ivermectin varnish, sustained-release ivermectin-loaded solid dispersion suspension, and biodegradable subcutaneous implants. However, several reports of ivermectin resistance have been identified in different parts of the world over the past few years. Continuous use of suboptimal formulations or sub-therapeutic plasma concentrations may predispose an individual to resistance toward ivermectin. The current research trend is focused toward the need for developing ivermectin formulations that are stable, effective, and safe and that reduce the number of doses required for complete clinical cure in different parasitic diseases. Therefore, single-dose long-acting preparations of ivermectin that provide effective therapeutic drug concentrations need to be developed and commercialized, which may revolutionize drug therapy and prophylaxis against various parasitic diseases in the near future. The present review highlights the current advances in pharmacokinetic modulation of ivermectin formulations and their potent therapeutic applications, issues related to emergence of ivermectin resistance, and future trends of ivermectin usage.
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Affiliation(s)
- Khan Sharun
- Division of Surgery, ICAR-Indian Veterinary Research Institute, Bareilly, Uttar Pradesh, India
| | - T. S. Shyamkumar
- Division of Pharmacology and Toxicology, ICAR-Indian Veterinary Research Institute, Bareilly, Uttar Pradesh, India
| | - V. A. Aneesha
- Division of Pharmacology and Toxicology, ICAR-Indian Veterinary Research Institute, Bareilly, Uttar Pradesh, India
| | - Kuldeep Dhama
- Division of Pathology, ICAR-Indian Veterinary Research Institute, Bareilly, Uttar Pradesh, India
| | - Abhijit Motiram Pawde
- Division of Surgery, ICAR-Indian Veterinary Research Institute, Bareilly, Uttar Pradesh, India
| | - Amar Pal
- Division of Surgery, ICAR-Indian Veterinary Research Institute, Bareilly, Uttar Pradesh, India
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Thomas C, Coates SJ, Engelman D, Chosidow O, Chang AY. Ectoparasites: Scabies. J Am Acad Dermatol 2019; 82:533-548. [PMID: 31310840 DOI: 10.1016/j.jaad.2019.05.109] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 05/16/2019] [Accepted: 05/22/2019] [Indexed: 12/26/2022]
Abstract
Scabies is an ectoparasitic dermatosis caused by Sarcoptes scabiei var. hominis and is a public health issue in all countries regardless of socioeconomic status. In high-income countries, delays in diagnosis can lead to institutional outbreaks; in low- and middle-income countries, poor access to health care contributes to disease undertreatment and long-term systemic sequelae. With scabies now recognized as a neglected tropical disease by the World Health Organization, increased awareness and systematic efforts are addressing gaps in diagnosis and treatment that impede scabies control. This review summarizes the available data and provides an update on scabies epidemiology, clinical features, diagnosis, management, and public health considerations.
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Affiliation(s)
- Cristina Thomas
- Departments of Dermatology and Internal Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Sarah J Coates
- Department of Dermatology, University of California, San Francisco, San Francisco, California
| | - Daniel Engelman
- International Alliance for the Control of Scabies, Parkville, Australia; Tropical Diseases, Murdoch Children's Research Institute, Melbourne, Australia; Department of Paediatrics, University of Melbourne, Melbourne, Australia; Department of General Medicine, Royal Children's Hospital, Melbourne, Australia
| | - Olivier Chosidow
- International Alliance for the Control of Scabies, Parkville, Australia; Department of Dermatology, Assistance Publique - Hôpitaux de Paris, University Paris-Est Créteil, Créteil, France
| | - Aileen Y Chang
- Department of Dermatology, University of California, San Francisco, San Francisco, California; International Alliance for the Control of Scabies, Parkville, Australia.
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Engelman D, Cantey PT, Marks M, Solomon AW, Chang AY, Chosidow O, Enbiale W, Engels D, Hay RJ, Hendrickx D, Hotez PJ, Kaldor JM, Kama M, Mackenzie CD, McCarthy JS, Martin DL, Mengistu B, Maurer T, Negussu N, Romani L, Sokana O, Whitfeld MJ, Fuller LC, Steer AC. The public health control of scabies: priorities for research and action. Lancet 2019; 394:81-92. [PMID: 31178154 PMCID: PMC11257500 DOI: 10.1016/s0140-6736(19)31136-5] [Citation(s) in RCA: 80] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 04/14/2019] [Accepted: 04/25/2019] [Indexed: 12/16/2022]
Abstract
Scabies is a parasitic disease of the skin that disproportionately affects disadvantaged populations. The disease causes considerable morbidity and leads to severe bacterial infection and immune-mediated disease. Scientific advances from the past 5 years suggest that scabies is amenable to population-level control, particularly through mass drug administration. In recognition of these issues, WHO added scabies to the list of neglected tropical diseases in 2017. To develop a global control programme, key operational research questions must now be addressed. Standardised approaches to diagnosis and methods for mapping are required to further understand the burden of disease. The safety of treatments for young children, including with ivermectin and moxidectin, should be investigated. Studies are needed to inform optimum implementation of mass treatment, including the threshold for intervention, target, dosing, and frequency. Frameworks for surveillance, monitoring, and evaluation of control strategies are also necessary.
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Affiliation(s)
- Daniel Engelman
- Tropical Diseases Group, Murdoch Children's Research Institute, Melbourne, VIC, Australia; Department of Paediatrics, University of Melbourne, Melbourne, VIC, Australia; Department of General Medicine, Royal Children's Hospital, Melbourne, VIC, Australia.
| | - Paul T Cantey
- Department of Control of Neglected Tropical Diseases, World Health Organization, Geneva, Switzerland
| | - Michael Marks
- Clinical Research Department, Faculty of Infectious and Tropical Diseases, London School of Hygiene & Tropical Medicine, London, UK
| | - Anthony W Solomon
- Department of Control of Neglected Tropical Diseases, World Health Organization, Geneva, Switzerland
| | - Aileen Y Chang
- Department of Dermatology, University of California San Francisco, San Francisco, CA, USA
| | - Olivier Chosidow
- Department of Dermatology, Hôpital Henri-Mondor, Assistance Publique Hôpitaux de Paris, Créteil, France; Université Paris-Est Créteil Val-de-Marne, Créteil, France
| | - Wendemagegn Enbiale
- Department of Dermatovenerology, College of Medicine and Health Sciences, Bahir Dar University, Bahir Dar, Ethiopia
| | - Dirk Engels
- Uniting to Combat Neglected Tropical Diseases, Switzerland
| | - Roderick J Hay
- Department of Dermatology, King's College London, London, UK
| | - David Hendrickx
- Telethon Kids Institute, University of Western Australia, Perth, WA, Australia
| | - Peter J Hotez
- National School of Tropical Medicine, Baylor College of Medicine, Houston, TX, USA
| | - John M Kaldor
- The Kirby Institute, University of New South Wales, Sydney, NSW, Australia
| | - Mike Kama
- Ministry of Health and Medical Services, Suva, Fiji
| | | | - James S McCarthy
- QIMR Berghoefer Medical Research Institute, Brisbane, QLD, Australia
| | - Diana L Martin
- Division of Parasitic Diseases and Malaria, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | | | - Toby Maurer
- Department of Dermatology, University of California San Francisco, San Francisco, CA, USA
| | | | - Lucia Romani
- The Kirby Institute, University of New South Wales, Sydney, NSW, Australia
| | - Oliver Sokana
- Ministry of Health and Medical Services, Honiara, Solomon Islands
| | - Margot J Whitfeld
- Department of Dermatology, St Vincent's Hospital, University of New South Wales, Sydney, NSW, Australia
| | - L Claire Fuller
- Chelsea and Westminster Healthcare National Health Service Foundation Trust, London, UK; International Foundation for Dermatology, London, UK
| | - Andrew C Steer
- Tropical Diseases Group, Murdoch Children's Research Institute, Melbourne, VIC, Australia; Department of Paediatrics, University of Melbourne, Melbourne, VIC, Australia; Department of General Medicine, Royal Children's Hospital, Melbourne, VIC, Australia
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Kumar R. Molecular markers and their application in the monitoring of acaricide resistance in Rhipicephalus microplus. EXPERIMENTAL & APPLIED ACAROLOGY 2019; 78:149-172. [PMID: 31190248 DOI: 10.1007/s10493-019-00394-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 06/03/2019] [Indexed: 06/09/2023]
Abstract
Monitoring acaricide resistance and understanding the underlying mechanisms are critically important in developing strategies for resistance management and tick control. Identification of single nucleotide polymorphisms in the acaricide-resistant associated gene of Rhipicephalus microplus has enabled the development of molecular markers for detection and monitoring of resistance against different types of acaricide. There are many molecular markers developed for resistance monitoring, including mutations on target genes such as sodium channel, acetylcholinesterase, carboxylesterase, β-adrenergic octopamine receptor, octopamine-tyramine etc. Molecular genotyping through molecular markers can detect the presence of resistance-associated genes in a tick population before it reaches high frequency. This review aims to provide an update on the various molecular markers discovered to date from different regions of the world.
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Affiliation(s)
- Rinesh Kumar
- College of Veterinary Science and Animal Husbandry, Rewa, Madhya Pradesh, India.
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49
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Hellen R, Ní Raghallaigh S. Misuse of veterinary wormers in self‐medication of rosacea and scabies. Br J Dermatol 2019; 180:955. [DOI: 10.1111/bjd.17540] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- R. Hellen
- Department of Dermatology Beaumont Hospital Dublin 9 Ireland
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Sunderkötter C, Aebischer A, Neufeld M, Löser C, Kreuter A, Bialek R, Hamm H, Feldmeier H. Zunahme von Skabies in Deutschland und Entwicklung resistenter Krätzemilben? Evidenz und Konsequenz. J Dtsch Dermatol Ges 2019; 17:15-24. [DOI: 10.1111/ddg.13706_g] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 09/24/2018] [Indexed: 12/01/2022]
Affiliation(s)
- Cord Sunderkötter
- Universitätsklinik und Poliklinik für Dermatologie und Venerologie; Universitätsklinikum Halle (Saale); Martin-Luther-Universität Halle-Wittenberg; Halle (Saale)
- Abteilung für Translationale Dermatoinfektiologie; Medizinische Fakultät der Universität Münster
| | - Anton Aebischer
- Robert Koch-Institut, Berlin; Fachgebiet 16 Erreger von Pilz- und Parasiteninfektionen und Mykobakteriosen
| | - Matthias Neufeld
- Abteilung für Translationale Dermatoinfektiologie; Medizinische Fakultät der Universität Münster
| | - Christoph Löser
- Hautklinik; Hauttumorzentrum; Klinikum Ludwigshafen; Ludwigshafen
| | - Alexander Kreuter
- Klinik für Dermatologie; Venerologie und Allergologie; HELIOS St. Elisabeth Krankenhaus Oberhausen
| | - Ralf Bialek
- LADR GmbH MVZ Dr. Kramer & Kollegen; Geesthacht
| | - Henning Hamm
- Klinik und Poliklinik für Dermatologie; Venerologie und Allergologie; Universitätsklinikum Würzburg
| | - Hermann Feldmeier
- Institut für Mikrobiologie und Infektionsimmunologie; Charité - Universitätsmedizin; Campus Benjamin Franklin; Berlin
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