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Pineda-Alegría JA, Peña-Rodríguez LM, Cardoso-Taketa A, Sánchez JE, Torres-Acosta JFDJ, Hernández-Bolio GI, Ortiz-Caltempa A, Villarreal ML, Aguilar-Marcelino L. 1H-NMR Metabolomic Study of the Mushroom Pleurotus djamor for the Identification of Nematocidal Compounds. Pharmaceuticals (Basel) 2024; 17:580. [PMID: 38794150 PMCID: PMC11124069 DOI: 10.3390/ph17050580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Revised: 04/25/2024] [Accepted: 04/29/2024] [Indexed: 05/26/2024] Open
Abstract
Due to the increasing populations of anthelmintic-resistant gastrointestinal nematodes and as a consequence of the adverse effects of synthetic drugs, this study focuses on the search for secondary metabolites with nematocidal activity from the edible mushroom Pleurotus djamor using The proton nuclear magnetic resonance (1H-NMR) metabolomics. The highest activity was shown by the ethyl acetate fractions of mycelium (EC50 290.8 µg/mL) and basidiomes (EC50 282.7 µg/mL). Principal component analysis (PCA) and hierarchical data analysis (HCA) of the 1H-NMR metabolic profiles data showed that the ethanolic extracts, the ethyl acetate, butanol, and water fractions from mycelium have different metabolic profiles than those from basidiomes, while low polarity (hexane) fractions from both stages of fungal development show similar profiles. Orthogonal partial least squares discriminant analysis (OPLS-DA) allowed the identification of signals in the 1H-NMR metabolic profile associated with nematocidal activity. The signals yielded via OPLS-DA and bidimensional NMR analysis allowed the identification of uracil as a component in the ethyl acetate fraction from basidiomes, with an EC50 of 237.7 µg/mL. The results obtained showed that chemometric analyses of the 1H-NMR metabolic profiles represent a viable strategy for the identification of bioactive compounds from samples with complex chemical profiles.
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Affiliation(s)
- Jesús Antonio Pineda-Alegría
- Centro de Investigación en Biotecnología, Universidad Autónoma del Estado de Morelos, Cuernavaca 62209, Morelos, Mexico; (J.A.P.-A.); (A.C.-T.); (A.O.-C.)
| | | | - Alexandre Cardoso-Taketa
- Centro de Investigación en Biotecnología, Universidad Autónoma del Estado de Morelos, Cuernavaca 62209, Morelos, Mexico; (J.A.P.-A.); (A.C.-T.); (A.O.-C.)
| | - José E. Sánchez
- Departamento de Ciencias de la Sustentabilidad, El Colegio de la Frontera Sur, Carretera Antiguo Aeropuerto Km. 2.5, Tapachula 30700, Chiapas, Mexico;
| | - Juan Felipe de Jesús Torres-Acosta
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Yucatán, Km 15.5 Carretera Mérida-Xmatkuil, Mérida 97100, Yucatán, Mexico;
| | - Gloria Ivonne Hernández-Bolio
- Departamento de Física Aplicada, Centro de Investigación y Estudios Avanzados (CINVESTAV), Unidad Mérida, Mérida 97205, Yucatán, Mexico;
| | - Anabel Ortiz-Caltempa
- Centro de Investigación en Biotecnología, Universidad Autónoma del Estado de Morelos, Cuernavaca 62209, Morelos, Mexico; (J.A.P.-A.); (A.C.-T.); (A.O.-C.)
| | - María Luisa Villarreal
- Centro de Investigación en Biotecnología, Universidad Autónoma del Estado de Morelos, Cuernavaca 62209, Morelos, Mexico; (J.A.P.-A.); (A.C.-T.); (A.O.-C.)
| | - Liliana Aguilar-Marcelino
- Centro Nacional de Investigación Disciplinaria en Salud Animal e Inocuidad, Instituto Nacional de Investigaciones Forestales Agrícolas y Pecuarias (INIFAP), Km 11 Carretera Federal Cuernavaca-Cuautla, No. 8534, Jiutepec 62550, Morelos, Mexico
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Mir FH, Tanveer S, Bharti P, Para BA. Anthelmintic Activity of Saussurea costus (Falc.) Lipsch. Against Ascaridia galli, a Pathogenic Nematode in Poultry: In Vitro and In Vivo Studies. Acta Parasitol 2024:10.1007/s11686-024-00837-8. [PMID: 38605153 DOI: 10.1007/s11686-024-00837-8] [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: 08/16/2023] [Accepted: 03/08/2024] [Indexed: 04/13/2024]
Abstract
AIM OF THE STUDY The growing resistance of helminth parasites to currently available commercial anthelmintic drugs, combined with apprehensions regarding detrimental chemical residues in livestock products, has sparked an interest in exploring medicinal plants as an alternative strategy for treating helminthiasis. As a result, this study was designed to investigate the anthelmintic activity of crude methanolic extracts (CME) of Saussurea costus root on Ascaridia.galli, a pathogenic nematode of poultry. MATERIALS AND METHODS In vitro, the anthelmintic effect of Saussurea costus root was evaluated in comparison to commercial anthelmintic, levamisole on the adult nematode parasites, A.galli using worm motility inhibition (WMI) test. The CME of S.costus was also evaluated for in vivo anthelmintic activity in chickens experimentally infected with Ascaridia galli. For the in vivo study, one hundred-day-old chickens were orally infected with embryonated eggs of A. galli worms. The efficacy of the plant extract as an anthelmintic was assessed through two tests: faecal egg count reduction (FECR) test and worm count reduction (WCR) test. The study investigated three distinct doses of plant extract under in vivo setup: 500 mg kg-1 body weight (bw), 1000 mg kg-1 bw, and 2000 mg kg-1 bw. RESULTS In vitro, all the tested concentrations of S.costus (25 mg/ml, 50 mg/ml, and 100 mg/ml) showed a significant (P < 0.001) anthelmintic effects on live adult A. galli worms in terms of inhibition of worm motility at different hours post-treatment. At the highest concentration of the extract, we observed worm motility inhibition of 100% at 24 h post-exposure. On day 14 post-treatment, all birds were slaughtered, and adult A. galli worms were subsequently retrieved from their small intestines. Birds treated with CME extract of S. costus root exhibited a significant (P < 0.001) reduction in faecal egg count. However, the administration of the extract at the dosage of 500 mg kg-1bw to the birds did not reveal any significant (P > 0.05) differences in the worm count compared to the negative control group. The CME of S. costus at a dose of 2000 mg kg-1bw showed the highest anthelmintic activity by inducing 83.10% FECR and 76.47% WCR. CONCLUSION In conclusion, the root extract of S. costus has a promising anthelmintic activity on A. galli as demonstrated by the results of the present experiment.
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Affiliation(s)
- Fayaz Hussain Mir
- Department of Zoology, University of Kashmir, Srinagar, 190006, Jammu and Kashmir, India.
| | - Syed Tanveer
- Department of Zoology, University of Kashmir, Srinagar, 190006, Jammu and Kashmir, India
| | - Pooja Bharti
- Department of Zoology, University of Kashmir, Srinagar, 190006, Jammu and Kashmir, India
| | - Bilal Ahmad Para
- Department of Mathematical Sciences, Islamic University of Science and Technology, Awantipora, Kashmir, India
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Mustafa S, Alharbi LM, Abdelraheem MZ, Mobashar M, Qamar W, A Al-Doaiss A, Abbas RZ. Role of Silver Nanoparticles for the Control of Anthelmintic Resistance in Small and Large Ruminants. Biol Trace Elem Res 2024:10.1007/s12011-024-04132-5. [PMID: 38436800 DOI: 10.1007/s12011-024-04132-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Accepted: 02/26/2024] [Indexed: 03/05/2024]
Abstract
Helminths are considered a significant threat to the livestock industry, as they cause substantial economic losses in small and large ruminant farming. Their morbidity and mortality rates are also increasing day by day as they have zoonotic importance. Anthelmintic drugs have been used for controlling these parasites; unfortunately, due to the development of resistance of these drugs in helminths (parasites), especially in three major classes like benzimidazoles, nicotinic agonists, and macrocyclic lactones, their use is becoming very low. Although new anthelmintics are being developed, the process is time-consuming and costly. As a result, nanoparticles are being explored as an alternative to anthelmintics. Nanoparticles enhance drug effectiveness, drug delivery, and target specificity and have no resistance against parasites. Different types of nanoparticles are used, such as organic (chitosan) and inorganic (gold, silver, zinc oxide, iron oxide, and nickel oxide). One of them, silver nanoparticles (AgNPs), has unique properties in various fields, especially parasitology. AgNPs are synthesized from three primary methods: physical, chemical, and biological. Their primary mechanism of action is causing stress through the production of ROS that destroys cells, organs, proteins, and DNA parasites. The present review is about AgNPs, their mode of action, and their role in controlling anthelmintic resistance against small and large ruminants.
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Affiliation(s)
- Sahar Mustafa
- Department of Clinical Medicine and Surgery, University of Agriculture, Faisalabad, Pakistan
| | - Lafi M Alharbi
- Department of Veterinary Medicine, College of Agriculture and Veterinary Medicine, Qassim University, 51452, Buraidah, Saudi Arabia
| | - Mona Z Abdelraheem
- The National Institute of Oceanography and Fisheries (NIOF), Aswan, Egypt
| | - Muhammad Mobashar
- Department of Animal Nutrition, The University of Agriculture, Peshawar, Pakistan
| | - Warda Qamar
- Department of Parasitology, University of Agriculture, Faisalabad, Pakistan.
| | - Amin A Al-Doaiss
- Biology Department, College of Science, King Khalid University, P.O. Box 9004, 61413, Abha, Saudi Arabia
| | - Rao Zahid Abbas
- Department of Parasitology, University of Agriculture, Faisalabad, Pakistan
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Mukherjee A, Kar I, Patra AK. Understanding anthelmintic resistance in livestock using "omics" approaches. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:125439-125463. [PMID: 38015400 DOI: 10.1007/s11356-023-31045-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Accepted: 11/08/2023] [Indexed: 11/29/2023]
Abstract
Widespread and improper use of various anthelmintics, genetic, and epidemiological factors has resulted in anthelmintic-resistant (AR) helminth populations in livestock. This is currently quite common globally in different livestock animals including sheep, goats, and cattle to gastrointestinal nematode (GIN) infections. Therefore, the mechanisms underlying AR in parasitic worm species have been the subject of ample research to tackle this challenge. Current and emerging technologies in the disciplines of genomics, transcriptomics, metabolomics, and proteomics in livestock species have advanced the understanding of the intricate molecular AR mechanisms in many major parasites. The technologies have improved the identification of possible biomarkers of resistant parasites, the ability to find actual causative genes, regulatory networks, and pathways of parasites governing the AR development including the dynamics of helminth infection and host-parasite infections. In this review, various "omics"-driven technologies including genome scan, candidate gene, quantitative trait loci, transcriptomic, proteomic, and metabolomic approaches have been described to understand AR of parasites of veterinary importance. Also, challenges and future prospects of these "omics" approaches are also discussed.
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Affiliation(s)
- Ayan Mukherjee
- Department of Animal Biotechnology, West Bengal University of Animal and Fishery Sciences, Nadia, Mohanpur, West Bengal, India
| | - Indrajit Kar
- Department of Avian Sciences, West Bengal University of Animal and Fishery Sciences, Nadia, Mohanpur, West Bengal, India
| | - Amlan Kumar Patra
- American Institute for Goat Research, Langston University, Oklahoma, 73050, USA.
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Packianathan R, Hodge A, Wright J, DeRosa AA. Efficacy of a fixed-dose combination injectable (0.2 mg/kg doramectin + 6.0 mg/kg levamisole hydrochloride) in New Zealand cattle against naturally acquired gastrointestinal nematode populations with demonstrated resistance to doramectin. Vet Parasitol 2023; 323S:109998. [PMID: 37537024 DOI: 10.1016/j.vetpar.2023.109998] [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: 06/15/2023] [Revised: 07/22/2023] [Accepted: 07/24/2023] [Indexed: 08/05/2023]
Abstract
Intensive farming practices and heavy reliance on anthelmintics have contributed significantly to the problem of macrocyclic lactone (ML) resistance in New Zealand. Farmers now have few options for effectively controlling cattle gastrointestinal nematodes (GINs) and regularly experience sub-optimal efficacy against economically important species. We present a novel fixed-dose combination injectable (FDCI) that simultaneously delivers 0.2 mg/kg doramectin and 6 mg/kg levamisole hydrochloride (HCl) to target a broad spectrum of cattle GINs in a single dose, providing an additional solution to endoparasite control in an environment of anthelmintic resistance. A dose confirmation study was conducted using naturally acquired infections of GINs in beef cattle in New Zealand. Cattle with GIN infections confirmed by fecal egg count (FEC) were randomly allocated (n = 12 per group) to the control (saline-treated), FDCI-treated or doramectin-treated group. On Day 0, cattle were weighed and administered a single subcutaneous injection of saline or endectocide. Rectal fecal samples were collected from each animal on Day 7 for individual duplicate fecal egg count (FEC) analysis, and coprocultures were conducted on pooled fecal samples within each treatment group. All animals were euthanized and necropsied for worm recovery on Days 14 through 16. Treatment efficacy was calculated based on reduction in FECs and worm burdens. All enrolled cattle were positive for GINs based on Day -5 FECs, with geometric mean (GM) FECs ranging from 337 to 521 eggs per gram (EPG). All saline-treated cattle remained positive for GIN infections for the study duration (Day 7 GM FEC = 427 EPG). Necropsy and worm recoveries revealed the presence of doramectin-resistant Cooperia oncophora, C. surnabada and Trichostrongylus longispicularis, as evidenced by ≤ 72.3 % efficacy of doramectin against these species. The new FDCI was ≥ 99.8 % effective against all GIN species, including ML-resistant C. oncophora, C. surnabada and T. longispicularis, providing broad-spectrum efficacy and eliminating economically important cattle GINs, including ML-resistant populations.
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Affiliation(s)
- Raj Packianathan
- Zoetis, Veterinary Medicine Research and Development, Level 6, 5 Rider Boulevard, Rhodes, NSW 2138, Australia
| | - Andrew Hodge
- Zoetis, Veterinary Medicine Research and Development, Level 6, 5 Rider Boulevard, Rhodes, NSW 2138, Australia
| | - Jacqueline Wright
- Zoetis, Veterinary Medicine Research and Development, Level 6, 5 Rider Boulevard, Rhodes, NSW 2138, Australia
| | - Andrew A DeRosa
- Zoetis, Veterinary Medicine Research and Development, 333 Portage St, Kalamazoo, MI 49007, USA.
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DeRosa AA, Holzmer S, Ball JJ, Watkins LP, Blanding M, Alley M, Short TH, Bechtol DT, Waite AR, Rigoni EJ, Tena JK. Comparative growth performance of backgrounded beef heifers treated with an injectable fixed-dose combination (0.2 mg/kg doramectin + 6.0 mg/kg levamisole hydrochloride) or single-active (0.2 mg/kg ivermectin) endectocide. Vet Parasitol 2023; 323S:110054. [PMID: 37879976 DOI: 10.1016/j.vetpar.2023.110054] [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: 06/15/2023] [Revised: 10/13/2023] [Accepted: 10/13/2023] [Indexed: 10/27/2023]
Abstract
Gastrointestinal nematodes (GINs) can negatively impact all production classes of cattle, particularly growing cattle. A global decline in efficacy of broad-spectrum single-active anthelmintics requires alternative GIN control methods without the aid of novel drug classes. Here, we present a new fixed-dose combination injectable (FDCI) endectocide for cattle that combines doramectin (5 mg/ml) and levamisole hydrochloride (150 mg/ml). A 56-day comparative performance confinement backgrounding trial was conducted in stocker beef heifers (n = 1548) with confirmed GIN infections to (1) compare the Day 14 post-treatment effectiveness of the new FDCI endectocide to pen mates treated with the injectable single-active endectocide ivermectin, as evidenced by fecal egg counts (FECs) conducted for a randomly selected subset (10%) of both treatment groups, and (2) determine if the greater GIN control by the FDCI evidenced in the subsample improved growth performance in all FDCI-treated heifers. Heifers were procured in four cohorts, with a 10-week timeframe between enrollment of the first and last cohort. Treatment groups were comingled within dirt-floor pens (n = 31; 7-8 per cohort) and offered a standard backgrounding diet ad libitum for the study duration. Heifers with enrollment FEC ≥ 30 eggs per gram (EPG) were randomly allocated to receive the FDCI (n = 773) or ivermectin (n = 775) on Day 0. Day 0 FECs conducted on 10% of enrolled heifers (FDCI, n = 78; ivermectin, n = 79) were not different between treatment groups (p = 0.491). Day 14 FECs for the same heifers were reduced compared to Day 0 within each treatment group. Heifers given the FDCI had lower Day 14 AM FECs and higher FEC reduction test (FECRT) result (0.07 EPG; 0.999) than ivermectin-treated heifers (21.58 EPG; FECRT = 0.850). Mean body weight (BW) was not different between treatment groups on Day 0 (p = 0.2762) and Day 14 (p = 0.2010) but was significantly greater (p = 0.0007) for FDCI-treated heifers compared to ivermectin-treated heifers on Day 56. Compared to ivermectin-treated heifers, overall average daily gain from all evaluation periods (Day 0-14, Day 14-56, and Day 0-56) was greater (p ≤ 0.0052) in FDCI-treated heifers, and FDCI-treated heifers had 4.223 kg greater total weight gain over the 56-day study. The FDCI (0.2 mg/kg doramectin + 6.0 mg/kg levamisole hydrochloride) was highly effective in reducing GIN infections and thus promoted improved growth performance in beef heifers over a 56-day backgrounding period.
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Affiliation(s)
| | - Susan Holzmer
- Zoetis, 333 Portage Street, Kalamazoo, MI 49007, USA
| | - Jase J Ball
- Zoetis, 333 Portage Street, Kalamazoo, MI 49007, USA
| | | | | | - Mark Alley
- Zoetis, 333 Portage Street, Kalamazoo, MI 49007, USA
| | | | | | - Audie R Waite
- Agri Research, LLC, 17001 Hope Road, Canyon, TX 79015, USA
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Vinueza P, Calispa M, Condolo L, Toalombo P, Geldhof P. Benzimidazole Resistance in Cattle: The First Report of the Presence of F200Y Mutation in Cooperia in Ecuador. Vet Sci 2023; 10:378. [PMID: 37368764 DOI: 10.3390/vetsci10060378] [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: 04/05/2023] [Revised: 05/24/2023] [Accepted: 05/25/2023] [Indexed: 06/29/2023] Open
Abstract
Anthelmintic resistance among GINs in cattle is a worldwide issue. Identifying the early signs of anthelmintic resistance (AR) is necessary to sustainably manage bovine parasitic infections. This study aimed to evaluate the resistance status of bovine parasitic nematodes against FBZ on a farm with a known history of broad-spectrum anthelmintic usage in Ecuador. FBZ efficacy was analyzed using a fecal egg count reduction test (FECR test) and β-tubulin 1 mutation identification in Cooperia spp., the dominant nematode parasite identified before and after treatment. According to the FECR test, the nematode population was susceptible to FBZ. After amplifying and cloning the β-tubulin 1 of Cooperia spp., an F200Y mutation was found in 43% of the pooled larva coproculture after treatment. This study reports, for the first time, the presence of F200Y resistance-conferring mutation in Cooperia spp. in Ecuador. Although the nematode population was phenotypically susceptible to FBZ, the presence of F200Y suggests the existence of resistance in the early stages. Our findings highlight the need to implement alternative control strategies for parasitic infections besides broad-spectrum anthelmintics.
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Affiliation(s)
- Pamela Vinueza
- Escuela Superior Politécnica de Chimborazo, Facultad de Ciencias Pecuarias, Carrera de Medicina Veterinaria, Riobamba 060106, Ecuador
- Laboratory of Parasitology, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133-B, 9820 Merelbeke, Belgium
| | - Marlon Calispa
- UCLouvain, Earth al Life Institute ELIE, ELI Croix du Sud 2L/L7.05.05, 1348 Louvain-la-Neuve, Belgium
| | - Luis Condolo
- Escuela Superior Politécnica de Chimborazo, Facultad de Ciencias Pecuarias, Carrera de Medicina Veterinaria, Riobamba 060106, Ecuador
| | - Paula Toalombo
- Escuela Superior Politécnica de Chimborazo, Facultad de Ciencias Pecuarias, Carrera de Medicina Veterinaria, Riobamba 060106, Ecuador
| | - Peter Geldhof
- Laboratory of Parasitology, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133-B, 9820 Merelbeke, Belgium
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Strydom T, Lavan RP, Torres S, Heaney K. The Economic Impact of Parasitism from Nematodes, Trematodes and Ticks on Beef Cattle Production. Animals (Basel) 2023; 13:1599. [PMID: 37238028 PMCID: PMC10215612 DOI: 10.3390/ani13101599] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 05/01/2023] [Accepted: 05/08/2023] [Indexed: 05/28/2023] Open
Abstract
Global human population growth requires the consumption of more meat such as beef to meet human needs for protein intake. Cattle parasites are a constant and serious threat to the development of the beef cattle industry. Studies have shown that parasites not only reduce the performance of beef cattle, but also negatively affect the profitability of beef agriculture and have many other impacts, including contributing to the production of greenhouse gases. In addition, some zoonotic parasitic diseases may also threaten human health. Therefore, ongoing cattle parasite research is crucial for continual parasite control and the development of the beef cattle industry. Parasitism challenges profitable beef production by reducing feed efficiency, immune function, reproductive efficiency, liveweight, milk yield, calf yield and carcass weight, and leads to liver condemnations and disease transmission. Globally, beef cattle producers incur billions (US$) in losses due to parasitism annually, with gastrointestinal nematodes (GIN) and cattle ticks causing the greatest economic impact. The enormity of losses justifies parasitic control measures to protect profits and improve animal welfare. Geographical differences in production environment, management practices, climate, cattle age and genotype, parasite epidemiology and susceptibility to chemotherapies necessitate control methods customized for each farm. Appropriate use of anthelmintics, endectocides and acaricides have widely been shown to result in net positive return on investment. Implementing strategic parasite control measures, with thorough knowledge of parasite risk, prevalence, parasiticide resistance profiles and prices can result in positive economic returns for beef cattle farmers in all sectors.
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Affiliation(s)
- Tom Strydom
- MSD Animal Health, 20 Spartan Road, Isando, Kempton Park 1619, South Africa;
| | - Robert P. Lavan
- Merck & Co., Inc., 126 E. Lincoln Avenue, Rahway, NJ 07065, USA
| | - Siddhartha Torres
- Merck Animal Health, 2 Giralda Farms, Madison, NJ 07940, USA; (S.T.); (K.H.)
| | - Kathleen Heaney
- Merck Animal Health, 2 Giralda Farms, Madison, NJ 07940, USA; (S.T.); (K.H.)
- Heaney Veterinary Consulting, 303 Fletcher Lake Avenue, Bradley Beach, NJ 07720, USA
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De Seram EL, Uehlinger FD, de Queiroz C, Redman EM, Campbell JR, Nooyen D, Morisetti A, Pollock CM, Ekanayake S, Penner GB, Gilleard JS. Integration of ITS-2 rDNA nemabiome metabarcoding with Fecal Egg Count Reduction Testing (FECRT) reveals ivermectin resistance in multiple gastrointestinal nematode species, including hypobiotic Ostertagia ostertagi, in western Canadian beef cattle. Int J Parasitol Drugs Drug Resist 2023; 22:27-35. [PMID: 37119733 PMCID: PMC10165142 DOI: 10.1016/j.ijpddr.2023.04.002] [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: 11/28/2022] [Revised: 04/19/2023] [Accepted: 04/20/2023] [Indexed: 05/01/2023]
Abstract
A large-scale Fecal Egg Count Reduction Test (FECRT) was integrated with ITS-2 rDNA nemabiome metabarcoding to investigate anthelmintic resistance in gastrointestinal nematode (GIN) parasites in western Canadian beef cattle. The study was designed to detect anthelmintic resistance with the low fecal egg counts that typically occur in cattle in northern temperate regions. Two hundred and thirty-four auction market-derived, fall-weaned steer calves coming off pasture were randomized into three groups in feedlot pens: an untreated control group, an injectable ivermectin treatment group, and an injectable ivermectin/oral fenbendazole combination treatment group. Each group was divided into six replicate pens with 13 calves per pen. Individual fecal samples were taken pre-treatment, day 14 post-treatment, and at monthly intervals for six months for strongyle egg counting and metabarcoding. Ivermectin treatment resulted in an 82.4% mean strongyle-type fecal egg count reduction (95% CI 67.8-90.4) at 14 days post-treatment, while the combination treatment was 100% effective, confirming the existence of ivermectin-resistant GIN. Nemabiome metabarcoding of third-stage larvae from coprocultures revealed an increase in the relative abundance of Cooperia oncophora, Cooperia punctata, and Haemonchus placei at 14 days post-ivermectin treatment indicating ivermectin resistance in adult worms. In contrast, Ostertagia ostertagi third-stage larvae were almost completely absent from day 14 coprocultures, indicating that adult worms of this species were not ivermectin resistant. However, there was a recrudescence of O. ostertagi third stage larvae in coprocultures at three to six months post-ivermectin treatment, which indicated ivermectin resistance in hypobiotic larvae. The calves were recruited from the auction market and, therefore, derived from multiple sources in western Canada, suggesting that ivermectin-resistant parasites, including hypobiotic O. ostertagi larvae, are likely widespread in western Canadian beef herds. This work demonstrates the value of integrating ITS-2 rDNA metabarcoding with the FECRT to enhance anthelmintic resistance detection and provide GIN species- and stage-specific information.
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Affiliation(s)
- Eranga L De Seram
- Department of Large Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK, S7N 5B4, Canada; Department of Farm Animal Production and Health, Faculty of Veterinary Medicine and Animal Science, University of Peradeniya, Peradeniya, 20400, Sri Lanka.
| | - Fabienne D Uehlinger
- Department of Large Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK, S7N 5B4, Canada.
| | - Camila de Queiroz
- Faculty of Veterinary Medicine, Host-Parasite Interactions (HPI) Program, University of Calgary, Calgary, AB, T2N 4Z6, Canada; Department of Pathobiology, School of Veterinary Medicine, Saint George's University, West Indies, Grenada.
| | - Elizabeth M Redman
- Faculty of Veterinary Medicine, Host-Parasite Interactions (HPI) Program, University of Calgary, Calgary, AB, T2N 4Z6, Canada.
| | - John R Campbell
- Department of Large Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK, S7N 5B4, Canada.
| | - Drue Nooyen
- Faculty of Veterinary Medicine, Host-Parasite Interactions (HPI) Program, University of Calgary, Calgary, AB, T2N 4Z6, Canada.
| | - Arianna Morisetti
- Faculty of Veterinary Medicine, Host-Parasite Interactions (HPI) Program, University of Calgary, Calgary, AB, T2N 4Z6, Canada.
| | | | - Samantha Ekanayake
- Department of Large Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK, S7N 5B4, Canada.
| | - Gregory B Penner
- Department of Animal and Poultry Science, College of Agriculture and Bioresources, University of Saskatchewan, Saskatoon, SK, S7N 5A8, Canada.
| | - John S Gilleard
- Faculty of Veterinary Medicine, Host-Parasite Interactions (HPI) Program, University of Calgary, Calgary, AB, T2N 4Z6, Canada.
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Trapping Behaviour of Duddingtonia flagrans against Gastrointestinal Nematodes of Cattle under Year-Round Grazing Conditions. Pathogens 2023; 12:pathogens12030401. [PMID: 36986322 PMCID: PMC10055868 DOI: 10.3390/pathogens12030401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 02/15/2023] [Accepted: 02/27/2023] [Indexed: 03/06/2023] Open
Abstract
The purpose of using nematophagous fungi as biological control agents of gastrointestinal nematodes of livestock is to reduce the build-up of infective larvae on pasture and thus avoid clinical and subclinical disease. As the interaction of fungus-larval stages takes place in the environment, it is crucial to know how useful the fungal agents are throughout the seasons in areas where livestock graze all year-round. This study was designed to determine the predatory ability of the nematophagous fungus Duddingtonia flagrans against gastrointestinal nematodes of cattle during four experiments set up in different seasons. In each experiment, faeces containing eggs of gastrointestinal nematodes were mixed with 11,000 chlamydospores/g and deposited on pasture plots. A comparison between fungal-added faeces and control faeces without fungus were made with regard to pasture infectivity, larval presence in faecal pats, faecal cultures, faecal pat weight, and temperature inside the faecal mass. In three of the four experiments, Duddingtonia flagrans significantly reduced the population of infective larvae in cultures (68 to 97%), on herbage (80 to 100%), and inside the faecal pats (70 to 95%). The study demonstrated the possibility of counting on a biological control tool throughout most of the year in cattle regions with extensive grazing seasons.
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11
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Variability in the Response against Teladorsagia circumcincta in Lambs of Two Canarian Sheep Breeds. Int J Mol Sci 2022; 24:ijms24010029. [PMID: 36613497 PMCID: PMC9820046 DOI: 10.3390/ijms24010029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 12/02/2022] [Accepted: 12/14/2022] [Indexed: 12/24/2022] Open
Abstract
The increasing resistance to anthelmintics has necessitated the exploration of alternative control strategies of gastrointestinal nematode (GIN) infections. A sustainable option is genetic selection based on differences in susceptibility to GIN infection between and within breeds of sheep. Here, three-month-old Canaria Hair breed (GIN-resistant) and Canaria Sheep breed (GIN-susceptible) showed no significant between-breed differences after trickle infection with Teladorsagia circumcincta, whereas considerable individual variability was found in both breeds. Next, data from lambs of both breeds were used to explore the relationships between parasitological variables and T. circumcincta-specific IgA levels, local immune cell populations, and abomasal lymph node gene expression to understand the possible mechanisms underlying resistance. Mucosal IgA levels as well as numbers of globular leukocytes and MHC-II+ cells were associated with protection. Analysis of lymph node gene expression revealed the associations between lower parasite numbers and cumulative fecal egg counts and several immune pathways, such as leukocyte cell adhesion, activation and differentiation of T cells, in particular CD4+ and IL-4 production. The data obtained here may inform on the relationship between phenotypic resistance variability and protective responses at the humoral, cellular, and transcriptomic levels, thus contributing to identifying immune responses in young lambs that could be used as markers for selection.
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12
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Bordes L, Ticoulet D, Sutra JF, Lespine A, Jacquiet P. Lack of efficacy of topical administration of eprinomectin against gastrointestinal nematode in a French dairy sheep farm: A case of underexposure of worms. VETERINARY RECORD CASE REPORTS 2022. [DOI: 10.1002/vrc2.435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Léa Bordes
- UMR INRAE/ENVT IHAP UMT Pilotage de la Santé des Ruminants Université de Toulouse Toulouse France
| | | | | | - Anne Lespine
- UMR INRAE/ENVT INTHERES Université de Toulouse Toulouse France
| | - Philippe Jacquiet
- UMR INRAE/ENVT IHAP UMT Pilotage de la Santé des Ruminants Université de Toulouse Toulouse France
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Aderibigbe SA, Opayemi OS, Bolaji SA, Idowu SO. In vitro effect of three tropical plants on adult Haemonchus placei, an haematophagous nematode from cattle. BENI-SUEF UNIVERSITY JOURNAL OF BASIC AND APPLIED SCIENCES 2022. [DOI: 10.1186/s43088-022-00255-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
Vernonia amygdalina (leaf), Garcinia kola (seed), and Leucaena leucocephala (seed) are three well-known tropical plants used in African ethnomedicine to reduce parasitic worm burdens and are potential sources of alternative solution for controlling parasitic helminths infection in grazing livestock. This study investigated extracts from these plants for anthelmintic activity against adult Haemonchus placei, an haematophagous nematode from cattle abomasa. Powdered plant materials were macerated in acetone and the crude acetone extracts evaluated for anthelmintic activity using H. placei adult worm motility assay. Afterwards, fresh sample of V. amygdalina was macerated successively in chloroform and acetone and the extracts evaluated for anthelmintic activity. The chloroform extract was subjected to phytochemical and FT-IR analyses and fractionated by vacuum liquid chromatography. Anthelmintic data were fitted to a nonlinear regression equation (Log [extract or fraction] vs. lethality; variable slope) to produce best-fit sigmoidal curves and LC50 values computed with associated uncertainty.
Results
Of the three tropical plants, only V. amygdalina was active against adult H. placei with best-fit LC50 of 6.51 mg/mL (95% CI: 5.32–7.75). Evaluation of the two extracts obtained by successive maceration showed that chloroform extract (LC50, 2.46 mg/mL, 95% CI: 1.87–3.28) was 11 times as potent as acetone extract (LC50, 27.01 mg/mL, 95% CI: 21.32–48.57) (α < 0.0001). Chromatographic fractionation of the chloroform extract yielded four fractions (FA-FD) with FB (LC50, 2.38 mg/mL, 95% CI: 1.76–3.28) 2.19 times as potent as FC (LC50, 5.21 mg/mL, 95% CI: 4.40–5.79) against H. placei, while FA and FD were inactive. Phytochemical evaluation of the chloroform extract revealed the presence of saponins, steroids, terpenoids, cardiac glycosides, and the absence of tannins, flavonoids, alkaloids, and anthraquinones. FT-IR structural analysis of chloroform extract indicated the presence of key functional groups which are chemical fragments/ structural motifs known to be present in the two major classes of bioactive compounds (sesquiterpene lactones and steroid glucosides) reportedly to be found in V. amygdalina.
Conclusions
The findings showed that chloroform extract of V. amygdalina leaf possessed relatively good anthelmintic activity against adult H. placei. This could be indicative of its potential usefulness as an anthelmintic phytomedicine to control gastrointestinal nematodes infection in cattle.
Key highlights
Extracts of three different plant materials (one leaf, two seeds) were tested against adult Haemonchus placei in vitro;
Chloroform extract of Vernonia amygdalina was 11 times as potent as acetone extract;
Fractionation of the chloroform extract yielded a bioactive fraction responsible for about 90% of the total lethal effect of the chloroform extract.
Bioprocessing of V. amygdalina leaf could produce phytomedicines for organic livestock farming.
Graphical abstract
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Molento MB, Brandão YO. Macrocyclic lactone resistance in nematodes of cattle in Brazil: Blame it to the ticks! Parasitol Int 2022; 89:102588. [PMID: 35452796 DOI: 10.1016/j.parint.2022.102588] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 02/17/2022] [Accepted: 04/14/2022] [Indexed: 11/30/2022]
Abstract
Strategic helminth control in adult cattle would hardly impose sufficient selection pressure to parasite populations but reports of resistance against macrocyclic lactone (ML) based-products have been confirmed worldwide. The objective of this study was to evaluate the scientific literature of ML resistance (< 90.0% efficiency) in helminths of cattle from 2001 (the first report) to 2020 in Brazil. Additional to the data, we studied the correlation of parasite control practices based on a questionnaire given to 32 farmers. The search returned 246 reports and 21 full articles were selected. From these, a Wordcloud and a Keyword Co-occurrence Network graph were created. The published data revealed that most of the studies (19/21) reported multi-species (Cooperia spp., Haemonchus sp., Oesophagostomum radiatum, Trichostrongylus sp.) resistance to ML. None of the reports described the treatment frequency in the tested farms. As for the questionnaire, the majority of farmers (> 70.0%) responded that they rotate products after treatment, animals are treated monthly or biweekly (58.0%), treatments are based on visual evaluation (coat condition, ectoparasite infestation), and that in 94.0% of the times farmers treat all animals. Moreover, farmers use ML in association with potent acaricides (cypermethrin, chlorpyriphos, fluazuron) in more than 90.0% of the times (15/16). It was observed that this regimen was used to prevent and control the cattle-tick Rhipicephalus microplus (90.0%) and the horn-fly, Haematobia irritans (30.0%) infestations. We conclude that the most important factor for nematode resistance was the high level of ML exposure of up to 16 times/year, in combination with acaricides to control ticks and to a lesser extent to control horn-flies. Therefore, selection of helminth populations in cattle in Brazil can be considered secondary to ectoparasite control. The present analysis is critical, as one the most widespread recommendations to avoid drug resistance is to reduce the use of long-acting compounds, due to their extended persistent periods, increasing parasite selection. Moreover, a more serious attitude must be taken regarding parasite control strategies for livestock, reinforcing that health protocols should be based on single acaricidal products whenever possible. Complementary, selective evaluations based on transient threshold population abundance must be enforced to reduce treatment frequency, reducing parasite selection and animal distress.
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Affiliation(s)
- Marcelo Beltrão Molento
- Laboratory of Veterinary Clinical Parasitology, Federal University of Parana. Curitiba, PR, Brazil; Graduate Program of Microbiology, Parasitology and Pathology, Federal University of Parana, UFPR, Curitiba, PR, Brazil.
| | - Yara O Brandão
- Laboratory of Veterinary Clinical Parasitology, Federal University of Parana. Curitiba, PR, Brazil; Graduate Program of Microbiology, Parasitology and Pathology, Federal University of Parana, UFPR, Curitiba, PR, Brazil
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Moxidectin: A Viable Alternative for the Control of Ivermectin-Resistant Gastrointestinal Nematodes in Beef Cattle. ACTA VET-BEOGRAD 2022. [DOI: 10.2478/acve-2022-0002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Abstract
The increasing prevalence of anthelmintic resistance in cattle especially for avermectins, is a challenge for controlling parasites in some herds. Thus, field studies demonstrating the increase in productivity by the use of anthelmintic formulations, even when a suboptimal treatment (efficacy below 95%), can contribute to the development of gastrointestinal nematodes control programs in beef cattle. The objective of the present study was to evaluate the anthelmintic efficacy and productive performance in pasture-raised beef calves, treated with macrocyclic lactones. A Split plot in time randomized block design was used to assess weight gain and reduction in fecal egg count (FECs) of treatments: 1% moxidectin (1% MOX), ivermectin (IVM) and abamectin (ABM) (2.25% IVM+1.25% ABM), 4% IVM, 3.15% IVM and placebo. For the evaluation of FECs and weight gain of the animals, individual samples were collected seven days before treatment and, +14, +30, +56, +91 and +118 days post-treatment (DPT). The efficacies in the 14th DPT were: 72.3% (1% MOX), 22.1% (4% IVM), 22% (2.25% IVM + 1.25% ABM) and 0% (3.15% ivermectin). 1% MOX was the only treatment that resulted in a significant increase in weight gain of the animals compared to the placebo group after 118 days of treatment, with a difference of 7.6 kg. Therefore, MOX remains a viable alternative for the control of helminths resistant to avermectins and still capable of resulting in significant productive gains, even with an efficacy below 95%.
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Current status of resistance to ivermectin in Rhipicephalus sanguineus sensu stricto infesting dogs in three provinces in Argentina. Vet Parasitol Reg Stud Reports 2021; 26:100624. [PMID: 34879936 DOI: 10.1016/j.vprsr.2021.100624] [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: 05/03/2021] [Revised: 08/20/2021] [Accepted: 08/24/2021] [Indexed: 11/24/2022]
Abstract
Intensive use of macrocyclic lactones for parasite control exerts strong selective pressure for arthropods such as ticks to become resistant to them. Rhipicephalus sanguineus sensu stricto is a tick and disease vector of significant public health and veterinary importance worldwide. We assessed the toxicological response to the macrocyclic lactone ivermectin (IVM) in R. sanguineus s.s. infesting dogs in Argentina. Samples of nine tick populations were obtained by inspecting dogs at veterinary clinics, hospitals, or rural areas in the provinces of San Luis, Rio Negro, and Buenos Aires. Pet owners were interviewed to gather data on the history of dog treatment with ectoparasiticides. The larval immersion test was used to assess the toxicological response of R. sanguineus s.s. to IVM. Dose-response mortality regressions, lethal concentrations (LC), and slope were calculated by probit analysis. The lowest LC concentrations were used to designate the reference susceptible population because a laboratory reference strain of R. sanguineus s.s. does not exist in Argentina. Compared with the most susceptible tick population in this study, six populations (66.66%) were classified as resistant to IVM. A clear interpopulation variation in the level of IVM resistance was present (resistance ratios at LC50% ranged from 1.0 to 18.33 and at LC99% ranged from 1.0 to 8.96). In San Luis Province, all tick populations were classified as resistant. The highest level of IVM resistance (resistance ratio at LC50%:18.83 and LC99%:8.96) was found in a population of R. sanguineus s.s. from a rural area in the province of Buenos Aires. It is concluded that populations of R. sanguineus s.s. from dogs in three provinces of Argentina were resistant to IVM. Clear interpopulation variation in the level of IVM resistance was present.
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A journey through 50 years of research relevant to the control of gastrointestinal nematodes in ruminant livestock and thoughts on future directions. Int J Parasitol 2021; 51:1133-1151. [PMID: 34774857 DOI: 10.1016/j.ijpara.2021.10.007] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 10/28/2021] [Accepted: 10/29/2021] [Indexed: 11/20/2022]
Abstract
This review article provides an historical perspective on some of the major research advances of relevance to ruminant livestock gastrointestinal nematode control over the last 50 years. Over this period, gastrointestinal nematode control has been dominated by the use of broad-spectrum anthelmintic drugs. Whilst this has provided unprecedented levels of successful control for many years, this approach has been gradually breaking down for more than two decades and is increasingly unsustainable which is due, at least in part, to the emergence of anthelmintic drug resistance and a number of other factors discussed in this article. We first cover the remarkable success story of the discovery and development of broad-spectrum anthelmintic drugs, the changing face of anthelmintic drug discovery research and the emergence of anthelmintic resistance. This is followed by a review of some of the major advances in the increasingly important area of non-pharmaceutical gastrointestinal nematode control including immunology and vaccine development, epidemiological modelling and some of the alternative control strategies such as breeding for host resistance, refugia-based methods and biological control. The last 50 years have witnessed remarkable innovation and success in research aiming to improve ruminant livestock gastrointestinal nematode control, particularly given the relatively small size of the research community and limited funding. In spite of this, the growing global demand for livestock products, together with the need to maximise production efficiencies, reduce environmental impacts and safeguard animal welfare - as well as specific challenges such as anthelmintic drug resistance and climate change- mean that gastrointestinal nematode researchers will need to be as innovative in the next 50 years as in the last.
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Melo LRBD, Sousa LCD, de Menezes Oliveira CS, Alvares FBV, Ferreira LC, Bezerra RA, Athayde ACR, Feitosa TF, Vilela VLR. Resistance of bovine gastrointestinal nematodes to four classes of anthelmintics in the semiarid region of Paraíba state, Brazil. REVISTA BRASILEIRA DE PARASITOLOGIA VETERINARIA 2021; 30:e010921. [PMID: 34550213 DOI: 10.1590/s1984-29612021077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Accepted: 08/19/2021] [Indexed: 11/22/2022]
Abstract
The effectiveness of four anthelmintic classes on cattle gastrointestinal nematodes in the semi-arid region of Paraiba State, Brazil, was evaluated. Twenty farms were used, testing 40 animals in each one, totaling 800 animals. Cattle were divided into four groups composed with ten animals: I, treated with albendazole sulfoxide 15%; II, treated with ivermectin 1%; III, treated with closantel 25%; IV, treated with levamisole hydrochloride 7.5%. All treatments were administered subcutaneously. For the Fecal Egg Count Reduction Test (FECRT), individual fecal samples were collected on days 0 and 14, and sent for analysis of egg count per gram of feces (EPG) and larval cultures. It was observed that multiresistance was present in 95% (19/20) of the farms. Resistance to ivermectin and albendazole was observed in 95% (19/20), to closantel in 75% (15/20) and to levamisole in 20% (4/20). The most used management system was semi-intensive (75%; 15/20) and the ivermectin was the most reported drug for controlling helminths (65%; 13/20). Haemonchus spp. was the most prevalent helminth genus. It was concluded that the anthelmintic resistance of bovine gastrointestinal nematodes is high in the semi-arid of Paraíba State, Brazil, with multiresistance observed mainly to ivermectin, albendazole and closantel.
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Affiliation(s)
- Lídio Ricardo Bezerra de Melo
- Programa de Pós-graduação em Ciência e Saúde Animal, Universidade Federal de Campina Grande - UFCG, Patos, PB, Brasil
| | - Luana Carneiro de Sousa
- Departamento de Medicina Veterinária, Instituto Federal de Educação, Ciência e Tecnologia da Paraíba - IFPB, Sousa, PB, Brasil
| | | | - Felipe Boniedj Ventura Alvares
- Departamento de Medicina Veterinária, Instituto Federal de Educação, Ciência e Tecnologia da Paraíba - IFPB, Sousa, PB, Brasil
| | - Larissa Claudino Ferreira
- Programa de Pós-graduação em Ciência e Saúde Animal, Universidade Federal de Campina Grande - UFCG, Patos, PB, Brasil
| | - Roberto Alves Bezerra
- Programa de Pós-graduação em Ciência e Saúde Animal, Universidade Federal de Campina Grande - UFCG, Patos, PB, Brasil
| | - Ana Célia Rodrigues Athayde
- Programa de Pós-graduação em Ciência e Saúde Animal, Universidade Federal de Campina Grande - UFCG, Patos, PB, Brasil
| | - Thais Ferreira Feitosa
- Departamento de Medicina Veterinária, Instituto Federal de Educação, Ciência e Tecnologia da Paraíba - IFPB, Sousa, PB, Brasil
| | - Vinícius Longo Ribeiro Vilela
- Programa de Pós-graduação em Ciência e Saúde Animal, Universidade Federal de Campina Grande - UFCG, Patos, PB, Brasil.,Departamento de Medicina Veterinária, Instituto Federal de Educação, Ciência e Tecnologia da Paraíba - IFPB, Sousa, PB, Brasil
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das Neves JH, Carvalho N, Dos Santos NC, Júnior JR, Martins CL, Amarante AFT. Effect of antihelminths with contrasting efficacy against gastrointestinal nematodes on the live-weight gain of young Nellore cattle. Vet Parasitol Reg Stud Reports 2021; 25:100597. [PMID: 34474790 DOI: 10.1016/j.vprsr.2021.100597] [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: 06/23/2020] [Revised: 05/03/2021] [Accepted: 06/05/2021] [Indexed: 11/29/2022]
Abstract
We estimated the losses caused by gastrointestinal nematode (GIN) infections in young Nellore cattle born in three consecutive calving seasons (Cycles I, II and III). Three groups of animals: Group 1 - free from GIN using 2.5 mg/kg of albendazole sulfoxide; Group II - free from Oesophagosomum radiatum using 0.2 mg/kg of ivermectin but infected with ivermectin-resistant Haemonchus placei and Cooperia spp.; and Group III - non-treated experimental control animals, infected with all GIN, were observed over a period of 12 months. Male and female calves were evaluated starting before weaning when the animals were an average of approximately four months of age. In Cycle I, only females were evaluated. All the animals continued to graze on pastures of Urochloa spp. (= Brachiaria). All the groups showed median faecal egg counts of fewer than 250 eggs per gram (EPG), and no clinical signs of parasitic gastroenteritis were observed. The blood variables were within the normal ranges, and no calf presented anaemia. In most of the samplings, the median EPGs were significantly lower (P < 0.05) in the group treated with albendazole. Throughout the experiment, the most prevalent parasite observed in the control group was Cooperia spp., followed in decreasing order by Haemonchus spp., O. radiatum and Trichostrongylus spp. All the groups of calves exhibited weight gain throughout the trials with control group displaying the lowest body weight gain. Body weight variables between the albendazole- and ivermectin-treated groups were not significantly different (P > 0.05). After weaning, females animals in albendazole and ivermectin treated groups exhibited higher body weights, 20.4% and 22.7%, respectively, than those of the control group. Likewise, males treated with albendazole and ivermectin exhibited 27.6% and 25.8%, respectively, more body weight gain than animals under control group. Because the main difference between the ivermectin and the control groups was the O. radiatum parasitism, most of the losses in the control group were possibly due to this nematode species. Nevertheless, the other nematodes species that occurred in relatively high intensities in control group could also have an additive effect in such losses.
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Affiliation(s)
| | - Nadino Carvalho
- Departamento de Medicina Veterinária, Fundação Universidade Federal de Rondônia (UNIR), Rolim de Moura, RO, Brazil
| | - Nayara Capaldi Dos Santos
- Universidade Estadual Paulista (UNESP), Faculdade de Medicina Veterinária e Zootecnia, Botucatu, SP, Brazil
| | - João Ratti Júnior
- Universidade Estadual Paulista (UNESP), Faculdade de Medicina Veterinária e Zootecnia, Botucatu, SP, Brazil
| | - Cyntia L Martins
- Universidade Estadual Paulista (UNESP), Faculdade de Medicina Veterinária e Zootecnia, Botucatu, SP, Brazil
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20
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Hussein D, El-Shiekh RA, Saber FR, Attia MM, Mousa MR, Atta AH, Abdel-Sattar E, Mouneir SM. Unravelling the anthelmintic bioactives from Jasminum grandiflorum L. subsp. Floribundum adopting in vitro biological assessment. JOURNAL OF ETHNOPHARMACOLOGY 2021; 275:114083. [PMID: 33831469 DOI: 10.1016/j.jep.2021.114083] [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] [Received: 02/11/2021] [Revised: 03/17/2021] [Accepted: 03/25/2021] [Indexed: 06/12/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Jasminum grandiflorum L. is a medicinal plant widely used in the traditional system of Medicine as an anthelmintic in ringworm infections, for treating ulcers, stomatitis, skin diseases, and wounds. AIM OF THE STUDY The emergence of resistance by different parasites to currently used chemicals has been reported. There are increasing needs for more effective and safer parasiticides. Therefore, the current study was designed to investigate the methanolic extract of the aerial parts of J. grandiflorum subsp. Floribundum (JGTE) to confirm its traditional uses as anthelmintic through a bioassay-guided fractionation and isolation of the active components with anthelmintic activity. MATERIALS AND METHODS The JGTE was partitioned into dichloromethane (DCM-F) and n-butanol (BuOH-F) fractions. The JGTE, fractions, and the isolated compounds were tested in vitro for their anthelmintic activity using two nematodes; one larval stage of cestode and one arthropod. Four major compounds were isolated from the most active fraction (BuOH-F) including two flavonoids and two secoirridoid glycosides, identified as kaempferol-3-O-neohesperoside (1), rutin (2), oleuropein (3), and ligstroside (4). RESULTS Among the isolated compounds from most active fraction (BuOH-F), rutin (2) displayed the highest anthelmintic activity in a dose-dependent activity with IC50 of 41.04 μg/mL against H. muscae adult worm, followed by ligstroside (4) with IC50 of 50.56 μg/mL. CONCLUSIONS These findings could advocate the traditional use of J. grandiflorum L. and provide further insight into the anthelmintic activity of flavonoids.
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Affiliation(s)
- Dorria Hussein
- Departement of Pharmacology, Faculty of Veterinary Medicine, Cairo University, Giza, P.O. Box 12211, Egypt
| | - Riham A El-Shiekh
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, El Kasr El Aini Street, Cairo, 11562, Egypt
| | - Fatema R Saber
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, El Kasr El Aini Street, Cairo, 11562, Egypt
| | - Marwa M Attia
- Departement of Parasitology, Faculty of Veterinary Medicine, Cairo University, Giza, P.O. Box 12211, Egypt
| | - Mohamed R Mousa
- Department of Pathology, Faculty of Veterinary Medicine, Cairo University. Giza, P.O. Box 12211, Egypt
| | - Attia H Atta
- Departement of Pharmacology, Faculty of Veterinary Medicine, Cairo University, Giza, P.O. Box 12211, Egypt
| | - Essam Abdel-Sattar
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, El Kasr El Aini Street, Cairo, 11562, Egypt.
| | - Samar M Mouneir
- Departement of Pharmacology, Faculty of Veterinary Medicine, Cairo University, Giza, P.O. Box 12211, Egypt.
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21
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Monepantel pharmaco-therapeutic evaluation in cattle: Pattern of efficacy against multidrug resistant nematodes. INTERNATIONAL JOURNAL FOR PARASITOLOGY-DRUGS AND DRUG RESISTANCE 2021; 15:162-167. [PMID: 33799058 PMCID: PMC8044591 DOI: 10.1016/j.ijpddr.2021.03.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 03/11/2021] [Accepted: 03/15/2021] [Indexed: 11/23/2022]
Abstract
The goal of the current work was to perform an integrated evaluation of monepantel (MNP) pharmacokinetics (PK) and pharmacodynamics, measured as anthelmintic efficacy, after its oral administration to calves naturally infected with GI nematodes resistant to ivermectin (IVM) and ricobendazole (RBZ) on three commercial farms. On each farm, forty-five calves were randomly allocated into three groups (n = 15): MNP oral administration (2.5 mg/kg); IVM subcutaneous (SC) administration (0.2 mg/kg); and RBZ SC administration (3.75 mg/kg). Eight animals from the MNP treated group (Farm 1) were selected to perform the PK study. Drug concentrations were measured by HPLC. The efficacy was determined by the faecal egg count reduction test (FECRT). MNP and MNP-sulphone (MNPSO2) were the main analytes recovered in plasma. MNPSO2 systemic exposure was markedly higher compared to that obtained for MNP. Higher Cmax and AUC values were obtained for the active MNPSO2 metabolite (96.8 ± 29.7 ng/mL and 9220 ± 1720 ng h/mL) compared to MNP (21.5 ± 4.62 ng/mL and 1709 ± 651 ng h/mL). The MNPSO2 AUC value was 6-fold higher compared to the parent drug. Efficacies of 99% (Farm 1), 96% (Farm 2) and 98% (Farm 3) demonstrated the high activity of MNP (P < 0.05) against GI nematodes resistant to IVM (reductions between 27 and 68%) and RBZ (overall efficacy of 75% on Farm 3). While IVM failed to control Haemonchus spp. and Cooperia spp., and RBZ failed to control Coooperia spp. and Ostertagia spp., MNP achieved 100% efficacy against Haemonchus spp., Cooperia spp. and Ostertagia spp. However, a low efficacy of MNP against Oesophagostomum spp. (efficacies ranging from 22 to 74%) was observed. In conclusion, oral treatment with MNP should be considered for dealing with IVM and benzimidazole resistant nematode parasites in cattle. The work described here reports for the first time an integrated assessment of MNP pharmaco-therapeutic features and highlights the need to be considered as a highly valuable tool to manage nematode resistant to other chemical families.
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Kotze AC, Gilleard JS, Doyle SR, Prichard RK. Challenges and opportunities for the adoption of molecular diagnostics for anthelmintic resistance. Int J Parasitol Drugs Drug Resist 2020; 14:264-273. [PMID: 33307336 PMCID: PMC7726450 DOI: 10.1016/j.ijpddr.2020.11.005] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Revised: 11/22/2020] [Accepted: 11/26/2020] [Indexed: 02/06/2023]
Abstract
Anthelmintic resistance is a significant threat to livestock production systems worldwide and is emerging as an important issue in companion animal parasite management. It is also an emerging concern for the control of human soil-transmitted helminths and filaria. An important aspect of managing anthelmintic resistance is the ability to utilise diagnostic tests to detect its emergence at an early stage. In host-parasite systems where resistance is already widespread, diagnostics have a potentially important role in determining those drugs that remain the most effective. The development of molecular diagnostics for anthelmintic resistance is one focus of the Consortium for Anthelmintic Resistance and Susceptibility (CARS) group. The present paper reflects discussions of this issue that occurred at the most recent meeting of the group in Wisconsin, USA, in July 2019. We compare molecular resistance diagnostics with in vivo and in vitro phenotypic methods, and highlight the advantages and disadvantages of each. We assess whether our knowledge on the identity of molecular markers for resistance towards the different drug classes is sufficient to provide some expectation that molecular tests for field use may be available in the short-to-medium term. We describe some practical aspects of such tests and how our current capabilities compare to the requirements of an 'ideal' test. Finally, we describe examples of drug class/parasite species interactions that provide the best opportunity for commercial use of molecular tests in the near future. We argue that while such prototype tests may not satisfy the requirements of an 'ideal' test, their potential to provide significant advances over currently-used phenotypic methods warrants their development as field diagnostics.
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Affiliation(s)
- Andrew C. Kotze
- CSIRO Agriculture and Food, St. Lucia, Brisbane, 4072, QLD, Australia,Corresponding author. , CSIRO Agriculture and Food, St. Lucia, Brisbane, 4072, QLD, Australia.
| | - John S. Gilleard
- Department of Comparative Biology and Experimental Medicine, Host-Parasite Interactions Program, University of Calgary, Calgary, Alberta, T2N 4N1, Canada
| | - Stephen R. Doyle
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, CB10 1SA, UK
| | - Roger K. Prichard
- Institute of Parasitology, McGill University, Sainte Anne-de-Bellevue, QC, H9X 3V9, Canada
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Bartley DJ, Jewell NJ, Andrews LM, Mitchell S, Morrison AA. Molecular and phenotypic characterisation of fenbendazole resistance in a field-derived isolate of Ostertagia ostertagi. Vet Parasitol 2020; 289:109319. [PMID: 33249304 DOI: 10.1016/j.vetpar.2020.109319] [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: 08/27/2020] [Revised: 11/09/2020] [Accepted: 11/10/2020] [Indexed: 10/23/2022]
Abstract
The prevalence of anthelmintic resistance in the bovine nematode Cooperia oncophora has been well documented globally but lack of efficacy against the more pathogenic nematode species Ostertagia ostertagi is less common. The sensitivity of an O. ostertagi isolate to the benzimidazole class of anthelmintic was investigated using classical parasitological techniques following apparent clinical failure of controlled release fenbendazole capsule administration in first season grazers at pasture. A controlled efficacy test (CET) was conducted in conjunction with sequencing of the β-tubulin isotype 1 gene of larvae pre- and post-fenbendazole administration. Twelve helminth-naïve calves were infected experimentally with 20,000 third stage larvae; six received oral fenbendazole (7.5 mg/kg bodyweight) 28 days post infection. Total abomasal nematode burdens were compared between treatment and control groups to determine efficacy. Fenbendazole resistance in O. ostertagi was confirmed with a total treatment failure in reducing worm burden: efficacy of 0%. Sequence analysis of the β-tubulin isotype-1 gene from forty-five infective larvae from both control and treated groups was performed. The three commonest single nucleotide polymorphisms (SNPs) associated with benzimidazole resistance, namely F167Y, E198A and F200Y, were examined. The predominant resistance-associated SNPs were F200Y (78 % control and 79 % treated groups) and F167Y (remaining genotypes) and emphasises the importance of these SNPs in clinical disease in this isolate. The development of diagnostic molecular tools based on a characterised field-derived isolate of benzimidazole-resistant Ostertagia will enable future prevalence surveys to be undertaken to assess the possible risk posed by resistance in this economically important species.
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Affiliation(s)
- Dave J Bartley
- Disease Control, Moredun Research Institute, Pentlands Science Park, Edinburgh, EH26 0PZ, United Kingdom.
| | - Natalie J Jewell
- Animal and Plant Health Agency (APHA), Job's Well Road, Carmarthen, Carmarthenshire SA31 3EZ, United Kingdom
| | - Leigh M Andrews
- Disease Control, Moredun Research Institute, Pentlands Science Park, Edinburgh, EH26 0PZ, United Kingdom
| | - Sian Mitchell
- Animal and Plant Health Agency (APHA), Job's Well Road, Carmarthen, Carmarthenshire SA31 3EZ, United Kingdom
| | - Alison A Morrison
- Disease Control, Moredun Research Institute, Pentlands Science Park, Edinburgh, EH26 0PZ, United Kingdom
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Flota-Burgos GJ, Rosado-Aguilar JA, Rodríguez-Vivas RI, Borges-Argáez R, Martínez-Ortiz-de-Montellano C, Gamboa-Angulo M. Anthelmintic Activity of Extracts and Active Compounds From Diospyros anisandra on Ancylostoma caninum, Haemonchus placei and Cyathostomins. Front Vet Sci 2020; 7:565103. [PMID: 33173794 PMCID: PMC7538544 DOI: 10.3389/fvets.2020.565103] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Accepted: 08/17/2020] [Indexed: 01/31/2023] Open
Abstract
The present study aimed to evaluate the anthelmintic activity of leaf and bark extracts of Diospyros anisandra collected during different seasons and their major constituents on eggs of Ancylostoma caninum, Haemonchus placei, and cyathostomins. Specifically, the eclosion inhibition of the methanolic extracts of the leaves and bark of D. anisandra collected during the dry and rainy seasons (600–37.5 μg/ml) were evaluated in addition to the fractions, sub-fractions (300–37.5 μg/ml) and active major constituents (150–2.3 μg/ml). The rainy season bark extract had the highest percentage of eclosion inhibition (PEI) against the evaluated nematodes (≥ 90% at 75 μg/ml) along with high ovicidal activity (90.0 to 93.4% at 75 μg/ml). The purification of the rainy season bark extract showed that its biological activity came from the non-polar n-hexane fraction (≥ 93% at 75 μg/ml). The bioguided fractionation pointed to sub-fraction 5 as having the highest anthelmintic activity against the three evaluated genera of nematodes (PEI ≥ 93% at 37.5 μg/ml). Gas chromatography and mass spectrometry revealed that the major constituent in sub-fraction 5 was plumbagin. Upon evaluation, plumbagin was confirmed to be responsible for the anthelmintic activity of D. anisandra, with a PEI ≥ 90% at 2.3 μg/ml on the three evaluated nematodes. Additionally, the compounds betulin and lupeol in the bark of D. anisandra were evaluated but presented low anthelmintic activity (PEI ≤ 5.3% at 2.3 μg/ml). In conclusion, the rainy season bark extract of D. anisandra exerts a high ovicidal activity against the eggs of the three studied nematodes. Plumbagin is the active compound responsible for this activity and represents a potential alternative for the control of different genera of gastrointestinal nematodes given the current scenario of anthelmintic resistance.
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Affiliation(s)
- Gabriela Janett Flota-Burgos
- Departamento de Salud Animal, Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Yucatán, Mérida, Mexico
| | - José Alberto Rosado-Aguilar
- Departamento de Salud Animal, Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Yucatán, Mérida, Mexico
| | - Roger Iván Rodríguez-Vivas
- Departamento de Salud Animal, Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Yucatán, Mérida, Mexico
| | - Rocío Borges-Argáez
- Unidad de Biotecnología, Centro de Investigación Científica de Yucatán A.C., Mérida, Mexico
| | | | - Marcela Gamboa-Angulo
- Unidad de Biotecnología, Centro de Investigación Científica de Yucatán A.C., Mérida, Mexico
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Fávero FC, Dos Santos LB, Araújo FRD, Ramünke S, Krücken J, von Samson-Himmelstjerna G, Borges FDA. Haemonchus sp. in beef cattle in Brazil: species composition and frequency of benzimidazole resistance alleles. Prev Vet Med 2020; 185:105162. [PMID: 33099153 DOI: 10.1016/j.prevetmed.2020.105162] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 09/23/2020] [Accepted: 09/24/2020] [Indexed: 02/06/2023]
Abstract
The aim of the present study was to investigate the occurrence of Haemonchus contortus and Haemonchus placei in beef cattle and the frequency of single nucleotide polymorphisms associated with benzimidazole (BZ)-resistance in Haemonchus spp. in Brazil. For such, fecal samples were collected from 61 beef cattle ranches in 11 Brazilian states. Third-stage larvae (L3) were produced for morphological species identification and DNA extraction. PCR was performed for the analysis of the isotype 1 β-tubulin gene and the products were sequenced to confirm the presence of H. placei and H. contortus. For each field population, pyrosequencing assays were performed to quantify the frequency of the F167Y, E198A and F200Y polymorphisms in the isotype-1 β-tubulin gene. The results of the morphometric analysis of 2345 larvae showed that H. placei was present on all ranches. The analysis of the isotype 1 β-tubulin gene confirmed 100% prevalence for H. placei and 23.7% for H. contortus. Pyrosequencing assays demonstrated single-nucleotide polymorphisms (SNPs) associated with BZ-resistance in all three codons (F167Y, E198A and F200Y) of the isotype 1 β-tubulin gene in H. placei field populations. Frequencies of resistance-associated alleles above background (≥ 15%) were found for at least one codon in 11.4% of the field isolates and maximum frequencies of 30, 21 and 29% were found for codons 167, 198 and 200, respectively, on individual ranches. This study confirms the presence of H. contortus in beef cattle in the major livestock farming states in Brazil and demonstrates that genotypes associated with BZ resistance are present in field populations of Haemonchus spp..
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Affiliation(s)
- Flávia C Fávero
- School of Veterinary Medicine and Animal Science, Federal University of Mato Grosso do Sul, Campo Grande, Brazil
| | - Larissa B Dos Santos
- School of Veterinary Medicine and Animal Science, Federal University of Mato Grosso do Sul, Campo Grande, Brazil
| | - Flábio R de Araújo
- Brazilian Agricultural Research Corporation, Embrapa Gado de Corte, Campo Grande, Brazil
| | - Sabrina Ramünke
- Institute for Parasitology and Tropical Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
| | - Jürgen Krücken
- Institute for Parasitology and Tropical Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
| | | | - Fernando de A Borges
- School of Veterinary Medicine and Animal Science, Federal University of Mato Grosso do Sul, Campo Grande, Brazil.
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Flores AG, Osmari V, Ramos F, Marques CB, Ramos DJ, Botton SDA, Vogel FSF, Sangioni LA. Multiple resistance in equine cyathostomins: a case study from military establishments in Rio Grande do Sul, Brazil. ACTA ACUST UNITED AC 2020; 29:e003820. [PMID: 33027421 DOI: 10.1590/s1984-29612020086] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Accepted: 08/18/2020] [Indexed: 11/22/2022]
Abstract
Semi-intensive equine breeding system favors gastrointestinal nematode infections. The treatment of these infections is based on the use of anthelmintics. However, the inappropriate use of these drugs has led to parasitic resistance to the available active principles. The objective of this study was to evaluate the efficacy of the main classes of antiparasitic (ATP) used in control in adult and young animals, including: benzimidazoles (fenbendazole), pyrimidines (pyrantel pamoate), macrocyclic lactones (ivermectin and moxidectin), as well as the combination of active ingredients (ivermectin + pyrantel pamoate). The study was carried out in two military establishments, located in Rio Grande do Sul (RS), from January to December, 2018. The intervals between the treatments of the animals were performed from 30 to 90 days. Coproparasitological evaluations were determined by the egg count reduction in the faeces. Cyatostomine larvae were identified in pre and post-treatment cultures. The results demonstrated the multiple parasitic resistance of cyathostomins to fenbendazole, moxidectin in young animals, and to fenbendazole, pyrantel pamoate in adult animals. Thus, it is necessary to define or diagnose parasitic resistance to assist in the creation of prophylactic parasitic control, using suppressive treatment with ATP associated with integrated alternatives. The progress of parasitic resistance can be slowed.
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Affiliation(s)
- Alexandra Geyer Flores
- Departamento de Medicina Veterinária Preventiva - DMVP, Centro de Ciências Rurais - CCR, Universidade Federal de Santa Maria - UFSM, Santa Maria, RS, Brasil
| | - Vanessa Osmari
- Departamento de Medicina Veterinária Preventiva - DMVP, Centro de Ciências Rurais - CCR, Universidade Federal de Santa Maria - UFSM, Santa Maria, RS, Brasil
| | - Fernanda Ramos
- Departamento de Medicina Veterinária Preventiva - DMVP, Centro de Ciências Rurais - CCR, Universidade Federal de Santa Maria - UFSM, Santa Maria, RS, Brasil
| | - Camila Balconi Marques
- Departamento de Medicina Veterinária Preventiva - DMVP, Centro de Ciências Rurais - CCR, Universidade Federal de Santa Maria - UFSM, Santa Maria, RS, Brasil
| | - Denise Jaques Ramos
- Departamento de Medicina Veterinária Preventiva - DMVP, Centro de Ciências Rurais - CCR, Universidade Federal de Santa Maria - UFSM, Santa Maria, RS, Brasil
| | - Sônia de Avila Botton
- Departamento de Medicina Veterinária Preventiva - DMVP, Centro de Ciências Rurais - CCR, Universidade Federal de Santa Maria - UFSM, Santa Maria, RS, Brasil
| | - Fernanda Silveira Flores Vogel
- Departamento de Medicina Veterinária Preventiva - DMVP, Centro de Ciências Rurais - CCR, Universidade Federal de Santa Maria - UFSM, Santa Maria, RS, Brasil
| | - Luís Antônio Sangioni
- Departamento de Medicina Veterinária Preventiva - DMVP, Centro de Ciências Rurais - CCR, Universidade Federal de Santa Maria - UFSM, Santa Maria, RS, Brasil.,Laboratório de Doenças Parasitárias, Departamento de Medicina Veterinária Preventiva, Centro de Ciências Rurais, Universidade Federal de Santa Maria - UFSM, Santa Maria, RS, Brasil
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27
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Bosco A, Kießler J, Amadesi A, Varady M, Hinney B, Ianniello D, Maurelli MP, Cringoli G, Rinaldi L. The threat of reduced efficacy of anthelmintics against gastrointestinal nematodes in sheep from an area considered anthelmintic resistance-free. Parasit Vectors 2020; 13:457. [PMID: 32907633 PMCID: PMC7487796 DOI: 10.1186/s13071-020-04329-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Accepted: 08/30/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The worldwide increased difficulty to combat gastrointestinal nematode (GIN) infection in sheep, due to progressing anthelmintic resistance (AR), calls for an enhanced and standardized implementation of early detection of AR. This study provides a snapshot of the current AR status against benzimidazoles and macrocyclic lactones in southern Italy, generated with standardized techniques. METHODS On 10 sheep farms, the efficacy of albendazole (ALB) and either eprinomectin (EPR) or ivermectin (IVM) was evaluated based on the faecal egg count reduction test (FECRT) performed with the Mini-FLOTAC. For each tested drug, 40 sheep were rectally sampled at D0 and sampled again 14 days after the treatment (D14). The FECRT was calculated from individual samples and pooled samples which consist of 5 individual samples. Efficacy was classified as 'reduced, 'suspected' and 'normal'. Coprocultures were set for D0 and D14 faecal samples of each group. From farms with FECR < 95%, an in vitro egg hatch test (EHT) and a follow-up FECRT using fenbendazole (FBZ) were conducted. RESULTS Based on the FECR, high efficacy (from 95.7% to 100%) was observed for ALB and IVM in eight farms (Farms 3-10). On Farm 1 and Farm 2, the efficacy for the macrocyclic lactones was classified as 'normal', but 'reduced' efficacy was observed for ALB on Farm 1 (FECR = 75%) and 'suspected' efficacy on Farm 2 (FECR = 93.3%) with the predominant GIN genus Trichostrongylus followed by Haemonchus at D14. The FEC results of pooled samples strongly correlated with those of individual samples, for FEC at D0 (rs = 0.984; P < 0.0001) and at D14 (rs = 0.913; P < 0.0001). The classifications of efficacy in Farm 1 (FECR = 86.0%) and Farm 2 (FECR = 93.0%) in the follow-up FECRT with FBZ coincide with the main FECRT trial. The in vitro EHT confirmed AR in both farms (Farm 1: 89%; Farm 2: 74%). CONCLUSIONS In regions like southern Italy, where the negative impacts from AR have played a minor role, efficient monitoring of AR is important in order to evaluate potential risks and being able to promptly respond with countermeasures.
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Affiliation(s)
- Antonio Bosco
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, CREMOPAR, Naples, Italy
| | - Jan Kießler
- Institute of Parasitology, Department of Pathobiology, University of Veterinary Medicine Vienna, 1210, Vienna, Austria
| | - Alessandra Amadesi
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, CREMOPAR, Naples, Italy
| | - Marian Varady
- Institute of Parasitology of Slovak Academy of Sciences, 040 01, Košice, Slovakia
| | - Barbara Hinney
- Institute of Parasitology, Department of Pathobiology, University of Veterinary Medicine Vienna, 1210, Vienna, Austria
| | - Davide Ianniello
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, CREMOPAR, Naples, Italy
| | - Maria Paola Maurelli
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, CREMOPAR, Naples, Italy
| | - Giuseppe Cringoli
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, CREMOPAR, Naples, Italy
| | - Laura Rinaldi
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, CREMOPAR, Naples, Italy.
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Paras KL, Kaplan RM. Motility based assays using cultured fourth stage larvae fail to provide consistent discrimination between known avermectin-resistant and -susceptible isolates of Cooperia spp. Vet Parasitol 2020; 284:109197. [PMID: 32745924 DOI: 10.1016/j.vetpar.2020.109197] [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: 10/08/2019] [Revised: 07/25/2020] [Accepted: 07/27/2020] [Indexed: 11/25/2022]
Abstract
The fecal egg count reduction test (FECRT) is the only method commonly used for diagnosing anthelmintic resistance in gastrointestinal nematodes of cattle, but this method has several drawbacks that have limited its widescale implementation. Consequently, there exists a need to develop better methods for diagnosing resistance. Assays based on larval motility are used commonly for screening potential drug candidates, and for detecting drug resistance, but previous work in our lab demonstrated that the L3 stage failed to discriminate between avermectin-resistant and susceptible isolates of Cooperia spp. We hypothesized that the L4 may be a better stage for this purpose because it is a parasitic and actively feeding life stage without a double cuticle. L3 larvae of Cooperia spp. were exsheathed and cultured to L4 by maintaining them in media at 37 °C and 20 % CO2, with media changes and observation every 48 h for nine days. Three avermectin-resistant and two avermectin-susceptible GIN isolates (diagnosed by FECRT) containing >88 % Cooperia spp., were used. Three biological replicates were performed for each parasite isolate using both eprinomectin and ivermectin. Eleven drug concentrations from 0.01um to 40um and negative controls were evaluated. Motility readings were taken using the Worminator system before addition of the drug and at 24- and 48 -hs post drug exposure. Resistance ratios for ivermectin and eprinomectin ranged from 0.35 to 2.75 and 0.54-1.03, respectively. Though significant differences (p < 0.05) in percent inhibition were found at some drug concentrations in some assays, there were no consistent significant differences in the dose-response between susceptible and resistant isolates. Inhibition was greater in about half of the assays for the susceptible isolates, and in half the assays for the resistant isolates. The lack of consistency in these data indicate that motility of L4 is not a reliable diagnostic phenotype for measuring resistance to avermectin drugs in Cooperia spp.
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Affiliation(s)
- Kelsey L Paras
- University of Georgia College of Veterinary Medicine Department of Infectious Diseases, 501 D.W. Brooks Dr., Athens, GA, 30602, Greece
| | - Ray M Kaplan
- University of Georgia College of Veterinary Medicine Department of Infectious Diseases, 501 D.W. Brooks Dr., Athens, GA, 30602, Greece.
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Finch D, Schofield H, Floate KD, Kubasiewicz LM, Mathews F. Implications of Endectocide Residues on the Survival of Aphodiine Dung Beetles: A Meta-Analysis. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2020; 39:863-872. [PMID: 32181912 DOI: 10.1002/etc.4671] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 09/12/2019] [Accepted: 01/15/2020] [Indexed: 05/22/2023]
Abstract
It is often difficult to compare studies examining the effects of endectocides on dung fauna because of different experimental approaches, for example, active ingredients (eprinomectin, doramectin, ivermectin, moxidectin) and formulations (injectable, pour-on, spiked). To gain a better understanding, we performed a quantitative meta-analysis using 22 studies to assess the overall effect of endectocide residues on the occurrence (presence or absence) and abundance of aphodiine dung beetles. Our results document a positive effect on the occurrence of adult beetles, indicating that adults tend to be attracted to dung with residues. Conversely, larvae are less likely to occur in the presence of residues. Thus, either adults that colonize dung with residues do not lay eggs or, more likely, the larvae that hatch from these eggs die early in development. Abundance of adult and larval stages was shown to be significantly reduced in dung containing residues. When individual endectocides were compared, only ivermectin demonstrated a significantly negative effect on the abundance of both adults and larvae, possibly owing to a small sample size for other agents. In laboratory studies, only dung "spiked" with endectocides reduced the abundance of larvae, whereas during field research, only pour-on applications were shown to reduce the abundance of larvae. The present study further documents the nontarget effects of endectocide residues on dung-dwelling organisms, provides robust evidence on the consequences of different application methods, and emphasizes the need for standardized methodological techniques in future studies. Environ Toxicol Chem 2020;39:863-872. © 2020 SETAC.
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Affiliation(s)
- Domhnall Finch
- School of Life Sciences, University of Sussex, Falmer, East Sussex, United Kingdom
| | - Henry Schofield
- Vincent Wildlife Trust, Bronsil Courtyard, Eastnor, Ledbury, Herefordshire, United Kingdom
| | - Kevin D Floate
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, Alberta, Canada
| | - Laura M Kubasiewicz
- Research and Operational Support Department, The Donkey Sanctuary, Sidmouth, Devon, United Kingdom
| | - Fiona Mathews
- School of Life Sciences, University of Sussex, Falmer, East Sussex, United Kingdom
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30
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Neves JHD, Carvalho N, Amarante AFTD. Gastrointestinal nematode infections do not hinder the development of Simmental X Nellore crossbred calves raised with a nutritionally enhanced diet. ACTA ACUST UNITED AC 2020; 29:e015819. [PMID: 32236331 DOI: 10.1590/s1984-29612020006] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Accepted: 12/16/2019] [Indexed: 11/22/2022]
Abstract
An evaluation was made of the effect of anthelmintic treatments on the performance of Simmental X Nellore crossbred calves before and after weaning. To this end, the calves were divided into three groups: (1) treated monthly with a low efficacy anthelmintic drug, ivermectin; (2) treated monthly with a highly effective anthelmintic drug, albendazole; and (3) untreated control group. All the groups in this experiment showed an average fecal egg count of less than 400 eggs per gram (EPG), and no clinical signs of parasitic gastroenteritis. The blood variables were within the normal range and no calf presented anemia. In most of the samplings, mean EPGs were significantly lower (P<0.05) in the group treated with albendazole. The calves received dietary supplementation before and after weaning, which enabled them to gain weight in every month of the experiment and reach a body weight of about 250 kg on the last sampling date, before turning one year old. The anthelmintic treatments did not affect body weight gain, leading to the conclusion that, when fed with suitable dietary supplements, Simmental X Nellore crossbred calves are not affected by gastrointestinal nematode parasites acquired by grazing.
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Affiliation(s)
- José Henrique das Neves
- Setor de Produção Animal, Faculdade de Ensino Superior e Formação Integral - FAEF, Garça, SP, Brasil
| | - Nadino Carvalho
- Departamento de Medicina Veterinária, Fundação Universidade Federal de Rondônia - UNIR, Rolim de Moura, RO, Brasil
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Assessing anthelmintic resistance risk in the post-genomic era: a proof-of-concept study assessing the potential for widespread benzimidazole-resistant gastrointestinal nematodes in North American cattle and bison. Parasitology 2020; 147:897-906. [PMID: 32138794 PMCID: PMC7391874 DOI: 10.1017/s0031182020000426] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
As genomic research continues to improve our understanding of the genetics of anthelmintic drug resistance, the revolution in DNA sequencing technologies will provide increasing opportunities for large-scale surveillance for the emergence of drug resistance. In most countries, parasite control in cattle and bison has mainly depended on pour-on macrocyclic lactone formulations resulting in widespread ivermectin resistance. Consequently, there is an increased interest in using benzimidazole drugs which have been used comparatively little in cattle and bison in recent years. This situation, together with our understanding of benzimidazole resistance genetics, provides a practical opportunity to use deep-amplicon sequencing to assess the risk of drug resistance emergence. In this paper, we use deep-amplicon sequencing to scan for those mutations in the isotype-1 β-tubulin gene previously associated with benzimidazole resistance in many trichostrongylid nematode species. We found that several of these mutations occur at low frequency in many cattle and bison parasite populations in North America, suggesting increased use of benzimidazole drugs in cattle has the potential to result in widespread emergence of resistance in multiple parasite species. This work illustrates a post-genomic approach to large-scale surveillance of early emergence of anthelmintic resistance in the field.
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Field and Molecular Evaluation of Anthelmintic Resistance of Nematode Populations from Cattle and Sheep Naturally Infected Pastured on Mixed Grazing areas at Rio Grande do Sul, Brazil. Acta Parasitol 2020; 65:118-127. [PMID: 31721057 DOI: 10.2478/s11686-019-00137-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 10/16/2019] [Indexed: 11/20/2022]
Abstract
BACKGROUND Reports of a lack of efficacy of most of the anthelmintic compounds for ruminants associated with the long-time necessity for creating new molecules have stressed the urgency to adopt alternative methods to control gastrointestinal parasites infection, such as strategies of sharing grazing areas. Therefore, this study aimed to evaluate nematode populations affecting cattle and sheep that share grazing areas before and after treatment with different anthelmintic compounds, and investigate the efficacy of anthelmintic treatment in these naturally infected ruminants at farms in the state of Rio Grande do Sul, Brazil. METHODS The presence of co-infections by Haemonchus species was investigated by polymerase chain reaction (PCR) for groups treated with a benzimidazole. Farms were selected by: farmers' consent, presence of 42-60 (or more) calves and sheep per farm with counts of ≥ 200 eggs per gram of feces (EPG), availability of calves and lambs aging from 6 to 9 months, absence of anthelmintic treatment for both species for 60 days before the experimental period, and shared grazing areas between this species on each farm. Animals were distributed into six treatment groups for each ruminant species per farm and treated with: ivermectin, doramectin, moxidectin, levamisole, albendazole, and closantel. RESULTS Levamisol was the most effective anthelmintic compound for both ruminant species. In general, Cooperia spp., Haemonchus spp., and Trichostrongylus spp. were the genus present after tested treatments that were ineffective. PCR showed the presence of Haemonchus species co-infections between cattle and sheep. CONCLUSION Therefore, this study demonstrated the similarity between nematode population, the presence of multi-resistant nematodes, and the presence of Haemonchus species co-infections affecting different ruminant species that share pastures.
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Pivoto FL, Cezar AS, Vogel FSF, Leal MLDR. Effects of long-term indiscriminate use of macrocyclic lactones in cattle: Parasite resistance, clinical helminthosis, and production losses. VETERINARY PARASITOLOGY- REGIONAL STUDIES AND REPORTS 2020; 20:100381. [PMID: 32448543 DOI: 10.1016/j.vprsr.2020.100381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 12/26/2019] [Accepted: 02/03/2020] [Indexed: 11/29/2022]
Abstract
Our aims were to describe a case of clinical helminthosis caused by parasite resistance to macrocyclic lactones (MLs) after the long-term frequent use of these drugs in a cattle herd, and to evaluate the production losses prevented by the use of an effective anthelmintic treatment to control these resistant gastrointestinal nematodes (GINs). A case of clinical helminthosis culminating in the death of steers was investigated, the history of the antiparasitic treatments used during an 11-year period in the herd was assessed, and an efficacy test involving seven different drugs was performed. Thereafter, two groups of heifers naturally infected by ML-resistant GINs were formed and strategically treated with either a highly effective (levamisole) or less effective drug (doramectin) over a 9-month period. The heifers were evaluated monthly based on eggs per gram of feces (EPG) counts and liveweights. An evaluation of the history of parasite control in the farm revealed that MLs were used in 96.5% of the treatments aimed at controlling GINs, ticks, and myiasis in the herd. The efficacy test showed the presence of GINs resistance to all the MLs tested. However, levamisole and albendazole sulphoxide were highly effective against these parasites. Heifers treated with levamisole gained 12.1 kg more liveweight on average, compared to those treated with doramectin. Thus, we conclude that indiscriminate and long-term use of MLs in the studied herd led to the failure of GINs control, a critical situation resulting in significant production losses, and a surge of clinical helminthosis in young cattle. In addition, we showed increase in liveweight gain due to using a highly effective drug, in comparison to an ML, during a 9-month period, in heifers naturally infected by ML-resistant GINs.
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Affiliation(s)
- Felipe Lamberti Pivoto
- Departamento de Clínica de Grandes Animais (DCGA), Universidade Federal de Santa Maria (UFSM), Av. Roraima 1000, Santa Maria, RS 97105-900, Brazil.
| | - Alfredo Skrebsky Cezar
- Universidade Regional do Noroeste do Estado do Rio Grande do Sul (UNIJUI), Ijui, RS, Brazil
| | | | - Marta Lizandra do Rego Leal
- Departamento de Clínica de Grandes Animais (DCGA), Universidade Federal de Santa Maria (UFSM), Av. Roraima 1000, Santa Maria, RS 97105-900, Brazil
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Bordes L, Dumont N, Lespine A, Souil E, Sutra JF, Prévot F, Grisez C, Romanos L, Dailledouze A, Jacquiet P. First report of multiple resistance to eprinomectin and benzimidazole in Haemonchus contortus on a dairy goat farm in France. Parasitol Int 2020; 76:102063. [PMID: 31978599 DOI: 10.1016/j.parint.2020.102063] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 01/16/2020] [Accepted: 01/19/2020] [Indexed: 11/25/2022]
Abstract
Pour-on eprinomectin was recently registered for lactating small ruminants. Given the high prevalence of benzimidazole resistance in gastrointestinal nematodes in dairy goats, many farmers use eprinomectin exclusively to treat their animals. On a French dairy goat farm, a veterinary practitioner noted a poor response to two types of eprinomectin treatment (pour-on application and injectable formulation). Therefore, we evaluated the efficacy of both formulations of eprinomectin, as well as moxidectin and fenbendazole, using the fecal egg count reduction test (FECRT) according to the World Association for the Advancement of Veterinary Parasitology (WAAVP) guidelines. Nematode species were identified at days 0 and post-treatment days 14 after bulk larval cultures, by morphology and real-time PCR. Plasma concentrations of eprinomectin were analyzed by high-performance liquid chromatography (HPLC) at post-treatment days 2 and 5 in the eprinomectin-treated groups. Egg count reductions were poor in animals treated with topical (-16.7%; 95% CI:[-237; 59]) or subcutaneous (21.5%; 95% CI:[-126; 73]) eprinomectin, and with fenbendazole (-5.8%; 95% CI:[-205; 63]). Haemonchus contortus was the main species identified by morphology and by real-time PCR before and after treatment. The plasma concentrations of eprinomectin were determined in all eprinomectin-treated animals and were above 2 ng/ml at post-treatment day 2, indicating that the lack of effect was not due to low exposure of the worms to the drug. Interestingly, moxidectin remained effective in all infected animals. This is the first report of multiple resistance to eprinomectin and benzimidazole in H. contortus on a French dairy goat farm with moxidectin as a relevant alternative.
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Affiliation(s)
- Léa Bordes
- UMR INRA/ENVT IHAP, UMT Santé des Troupeaux de Petits Ruminants, Université de Toulouse, École Nationale Vétérinaire de Toulouse, France
| | | | - Anne Lespine
- INTHERES, Université de Toulouse, INRA, ENVT, Toulouse, France
| | - Elise Souil
- UMR INRA/ENVT IHAP, UMT Santé des Troupeaux de Petits Ruminants, Université de Toulouse, École Nationale Vétérinaire de Toulouse, France
| | | | - Françoise Prévot
- UMR INRA/ENVT IHAP, UMT Santé des Troupeaux de Petits Ruminants, Université de Toulouse, École Nationale Vétérinaire de Toulouse, France
| | - Christelle Grisez
- UMR INRA/ENVT IHAP, UMT Santé des Troupeaux de Petits Ruminants, Université de Toulouse, École Nationale Vétérinaire de Toulouse, France
| | - Lola Romanos
- UMR INRA/ENVT IHAP, UMT Santé des Troupeaux de Petits Ruminants, Université de Toulouse, École Nationale Vétérinaire de Toulouse, France
| | - Aurélie Dailledouze
- UMR INRA/ENVT IHAP, UMT Santé des Troupeaux de Petits Ruminants, Université de Toulouse, École Nationale Vétérinaire de Toulouse, France
| | - Philippe Jacquiet
- UMR INRA/ENVT IHAP, UMT Santé des Troupeaux de Petits Ruminants, Université de Toulouse, École Nationale Vétérinaire de Toulouse, France.
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Riou M, Guégnard F, Le Vern Y, Grasseau I, Koch C, Blesbois E, Kerboeuf D. Effects of cholesterol content on activity of P-glycoproteins and membrane physical state, and consequences for anthelmintic resistance in the nematode Haemonchus contortus. ACTA ACUST UNITED AC 2020; 27:3. [PMID: 31934848 PMCID: PMC6959138 DOI: 10.1051/parasite/2019079] [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: 05/27/2019] [Accepted: 12/27/2019] [Indexed: 12/23/2022]
Abstract
Eukaryote plasma membranes protect cells from chemical attack. Xenobiotics, taken up through passive diffusion, accumulate in the membranes, where they are captured by transporters, among which P-glycoproteins (Pgps). In nematodes such as Haemonchus contortus, eggshells and cuticles provide additional protective barriers against xenobiotics. Little is known about the role of these structures in the transport of chemical molecules. Pgps, members of the ABC transporter family, are present in eggshells and cuticles. Changes in the activity of these proteins have also been correlated with alterations in lipids, such as cholesterol content, in eggshells. However, the cellular mechanisms underlying these effects remain unclear. We show here that an experimental decrease in the cholesterol content of eggshells of Haemonchus contortus, with Methyl-beta-CycloDextrin (MβCD), results in an increase in membrane fluidity, favouring Pgp activity and leading to an increase in resistance to anthelmintics. This effect is modulated by the initial degree of anthelminthic resistance of the eggs. These results suggest that eggshell fluidity plays a major role in the modulation of Pgp activity. They confirm that Pgp activity is highly influenced by the local microenvironment, in particular sterols, as observed in some vertebrate models. Thus, eggshell barriers could play an active role in the transport of xenobiotics.
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Affiliation(s)
- Mickaël Riou
- INRAE, UE-1277 Plateforme d'infectiologie expérimentale (PFIE), Centre de Recherche Val de Loire, 37380 Nouzilly, France - INRAE, Université de Tours, UMR-1282 Infectiologie et Santé Publique (ISP), Centre de Recherche Val de Loire, 37380 Nouzilly, France
| | - Fabrice Guégnard
- INRAE, Université de Tours, UMR-1282 Infectiologie et Santé Publique (ISP), Centre de Recherche Val de Loire, 37380 Nouzilly, France
| | - Yves Le Vern
- INRAE, Université de Tours, UMR-1282 Infectiologie et Santé Publique (ISP), Centre de Recherche Val de Loire, 37380 Nouzilly, France
| | - Isabelle Grasseau
- INRAE, CNRS, HARAS NATIONAUX, IFCE, Université de Tours, UMR-0085 PRC Physiologie de la Reproduction et des Comportements, Centre de Recherche Val de Loire, 37380 Nouzilly, France
| | - Christine Koch
- INRAE, Université de Tours, UMR-1282 Infectiologie et Santé Publique (ISP), Centre de Recherche Val de Loire, 37380 Nouzilly, France
| | - Elisabeth Blesbois
- INRAE, CNRS, HARAS NATIONAUX, IFCE, Université de Tours, UMR-0085 PRC Physiologie de la Reproduction et des Comportements, Centre de Recherche Val de Loire, 37380 Nouzilly, France
| | - Dominique Kerboeuf
- INRAE, Université de Tours, UMR-1282 Infectiologie et Santé Publique (ISP), Centre de Recherche Val de Loire, 37380 Nouzilly, France
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Pivoto FL, Cezar AS, Vogel FSF, Marques CB, Alves MEM, Becker CC, do Rego Leal ML. Economic losses caused by the use of low-efficacy anthelmintic drugs in growing heifers. Trop Anim Health Prod 2019; 52:1365-1374. [PMID: 31758387 DOI: 10.1007/s11250-019-02144-1] [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: 07/31/2019] [Accepted: 10/31/2019] [Indexed: 10/25/2022]
Abstract
The aim of this study was to compare the economic revenue related to the use of low- or high-efficacy anthelmintic drugs within suppressive or strategic schemes of treatment in growing heifers. Heifers raised in a semi-intensive grazing system in southern Brazil were used. Levamisole and ivermectin were selected as the high- and the low-efficacy drugs, respectively, based on a previous efficacy test. Subsequently, these drugs were used within strategic (Strat; four times per year) or suppressive (Supp; once a month) treatment regimens in the heifers, and their liveweight and eggs per gram of feces counts were monthly evaluated during a 13-month period. The total costs of the treatments and their cost-benefit ratio in regard to liveweight gain were calculated. Final mean liveweight gains (kg) observed were 126.7 (Strat-Low), 133.6 (Supp-Low), 141.3 (Strat-High), 142.9 (Supp-High), and 125.8 (Control). Treatments with a high-efficacy drug resulted in monetary gains of US$ 19.56 (Strat-High) and US$ 14.98 (Supp-High), but Supp-Low and Strat-Low treatments caused economic losses. Total cost of the efficacy test (US$ 374.79) could be paid by the additional liveweight gain of 20 heifers from the Strat-High group. These results showed that it would be preferable not to treat the heifers against GIN if compared with treating them with a low-efficacy drug. In addition, we showed that the use of four treatments per year with a high-efficacy drug-selected by efficacy test-resulted in a profitable management to control GIN in growing heifers raised in a semi-intensive gazing system in southern Brazil.
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Affiliation(s)
- Felipe Lamberti Pivoto
- Departamento de Clínica de Grandes Animais (DCGA), Universidade Federal de Santa Maria (UFSM), Av. Roraima 1000, Santa Maria, RS, 97105-900, Brazil.
| | - Alfredo Skrebsky Cezar
- Universidade Regional do Noroeste do Estado do Rio Grande do Sul (UNIJUI), Ijui, RS, Brazil
| | | | - Camila Balconi Marques
- Departamento de Medicina Veterinária Preventiva (DMVP), Centro de Ciências Rurais (CCR), UFSM, Santa Maria, RS, Brazil
| | - Marta Elena Machado Alves
- Departamento de Medicina Veterinária Preventiva (DMVP), Centro de Ciências Rurais (CCR), UFSM, Santa Maria, RS, Brazil
| | | | - Marta Lizandra do Rego Leal
- Departamento de Clínica de Grandes Animais (DCGA), Universidade Federal de Santa Maria (UFSM), Av. Roraima 1000, Santa Maria, RS, 97105-900, Brazil
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Anthelmintic-like activity of polyphenolic compounds and their interactions against the cattle nematode Cooperia punctata. Vet Parasitol 2019; 274:108909. [PMID: 31586699 DOI: 10.1016/j.vetpar.2019.08.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 08/05/2019] [Accepted: 08/06/2019] [Indexed: 12/15/2022]
Abstract
Polyphenolic compounds (PCs) have been proposed as one of the most bioactive group of secondary metabolites occurring in nature and have been associated to anthelmintic (AH)-like activity of plants against cattle nematodes. However, little is known regarding their synergetic / antagonistic interactions. This study assessed the in vitro AH-like activity of commercial PCs: quercetin, caffeic acid, rutin and coumarin, and their combinations against the egg hatching and larval exsheathment of Cooperia punctata; one of the most prevalent nematodes affecting grazing cattle in tropical regions. The molecules selected for the in vitro analysis were identified as bioactive phytochemicals of plants through bio-guided fractionation in previous studies. To estimate mean effective concentrations (EC50) five increasing concentrations were used for both Egg hatching inhibition assay (EHIA) and larval exsheathment inhibition assay (LEIA) (0.6-9.8 mg mL-1 and 0.15-2.4 mg mL-1, respectively). From the four molecules, only rutin did not affect egg hatching; while quercetin, showed no bioactivity against eggs or larvae (P > 0.766 and P > 0.621, respectively). Best-fit EC50 estimated through the EHIA was considered for PCs classification as bioactive (coumarin and caffeic acid) and non-bioactive (quercetin and rutin). Phytochemical interactions were subsequently assessed combining bioactive:non-bioactive PCs (8:2 ratio), and the nature of their interaction was classified using the fractional inhibitory concentration index (FICindex). Combinations had a highly synergistic interaction against larval exsheathment (FICindex < 0.5) except for coumarin:rutin against egg hatching (FICindex> 0.5). Quercetin and rutin acted as PCs AH-like activity enhancers, reducing EC50 of bioactive molecules in a range of 43%-64% and 68%-83% for EHIA and LEIA, respectively. A linear relationship between low molecular weight of molecules and ovicidal activity was observed; where, molecules with lower molecular weight displayed better-fit EC50 for ovicidal activity. Furthermore, coumarin and caffeic acid bioactivity against free-living stages of C. punctata makes them suitable candidates as markers for anthelmintic-like activity in bioactive forages. Combinations used through this investigation showed a potent anthelmintic-like activity against free-living forms of C. punctata, representing a first step towards the identification of promising alternatives for nematode control.
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Baltrušis P, Halvarsson P, Höglund J. Molecular detection of two major gastrointestinal parasite genera in cattle using a novel droplet digital PCR approach. Parasitol Res 2019; 118:2901-2907. [PMID: 31388787 PMCID: PMC6754349 DOI: 10.1007/s00436-019-06414-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 07/26/2019] [Indexed: 01/25/2023]
Abstract
Cooperia sp. and Ostertagia sp. are two cosmopolitan parasitic nematodes often found in mixed gastrointestinal infections in cattle across temperate regions. In light of the recent increase in the emergence of anthelmintic resistance in these and other nematodes derived from cattle around the globe, and their negative impact on animal health and productivity, novel molecular assays need to be put forth in order to facilitate the monitoring of parasite burden in infected herds, using pasture and/or fecal samples. Here, we describe a novel droplet digital PCR platform–based concept for precise identification and quantification of the two most abundant and important parasite genera in grazing western European cattle. By exploiting a single nucleotide difference in the two parasites’ ITS2 sequence regions, we have developed two specific hydrolysis probes labeled with FAM™ or HEX™ fluorophores, which can not only distinguish between the DNA sequences of the two, but also quantify them in mixed DNA samples. A third, newly developed universal probe was also tested along the genus-specific probes to provide a robust and accurate reference. It was evident that the universal probe displayed congruent results to those obtained by the genus-specific probes when used with DNA from both parasites in a single sample. All in all, the results of our assay suggest that this novel protocol could be used to distinguish and quantify cattle parasites belonging to the two most important genera (i.e., Cooperia and Ostertagia) in a single mixed DNA sample.
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Affiliation(s)
- Paulius Baltrušis
- Department of Biomedical Sciences and Veterinary Public Health, Section for Parasitology, Swedish University of Agricultural Sciences, P.O. Box 7036, Uppsala, Sweden.
| | - Peter Halvarsson
- Department of Biomedical Sciences and Veterinary Public Health, Section for Parasitology, Swedish University of Agricultural Sciences, P.O. Box 7036, Uppsala, Sweden
| | - Johan Höglund
- Department of Biomedical Sciences and Veterinary Public Health, Section for Parasitology, Swedish University of Agricultural Sciences, P.O. Box 7036, Uppsala, Sweden
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Borges DGL, Echeverria JT, de Oliveira TL, Heckler RP, de Freitas MG, Damasceno-Junior GA, Carollo CA, Borges FDA. Discovery of potential ovicidal natural products using metabolomics. PLoS One 2019; 14:e0211237. [PMID: 30682122 PMCID: PMC6347362 DOI: 10.1371/journal.pone.0211237] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Accepted: 01/09/2019] [Indexed: 01/09/2023] Open
Abstract
Plant extracts are a potential source of new compounds for nematode control and may be an excellent alternative for the control gastrointestinal nematodes that are resistant to conventional anthelmintics. However, research involving natural products is a complex process. The main challenge is the identification of bioactive compounds. Online analytical techniques with universal detectors, such as high-performance liquid chromatography-mass spectrometry (HPLC-MS), together with metabolomics could enable the fast, accurate evaluation of a massive amount of data, constituting a viable option for the identification of active compounds in plant extracts. This study focused on the evaluation of the ovicidal activity of ethanol extracts from 17 plants collected from the Pantanal wetland in the state of Mato Grosso do Sul, Brazil, against eggs of Haemonchus placei using the egg hatchability test. The ethanol extracts were obtained using accelerated solvent extraction. The data on ovicidal activity, mass spectrometry and metabolomics were evaluated using HPLC-DAD-MS, partial least squares regression analysis (PLS-DA) and a correlation map (univariate correlation analyses) to detect compounds that have a positive correlation with biological activity. Among the ten metabolites with the best correlation coefficients, six were phenylpropanoids, two were triterpene saponins, one was a brevipolide, and one was a flavonoid. Combinations of metabolites with high ovicidal action were also identified, such as phenylpropanoids combined with the triterpene saponins and the flavonoid, flavonoids combined with iridoid and phenylpropanoids, and saponins combined with phenylpropanoid. The positive correlation between classes of compounds in plants belonging to different genera and biological activity (as previously identified in the literature) reinforces the robustness of the statistical data and demonstrates the efficacy of this method for the selection of bioactive compounds without the need for isolation and reevaluation. The proposed method also enables the determination of synergism among the classes, which would be impracticable using traditional methods. The present investigation demonstrates that the metabolomic technique was efficient at detecting secondary metabolites with ovicidal activity against H. placei. Thus, the use of metabolomics can be a tool to accelerate and simplify bioprospecting research with plant extracts in veterinary parasitology.
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Affiliation(s)
- Dyego Gonçalves Lino Borges
- School of Veterinary Medicine and Animal Science, Federal University of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
- * E-mail:
| | - Jessica Teles Echeverria
- School of Veterinary Medicine and Animal Science, Federal University of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
| | - Tamires Lima de Oliveira
- School of Veterinary Medicine and Animal Science, Federal University of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
| | - Rafael Pereira Heckler
- School of Veterinary Medicine and Animal Science, Federal University of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
| | - Mariana Green de Freitas
- School of Veterinary Medicine and Animal Science, Federal University of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
| | | | - Carlos Alexandre Carollo
- School of Pharmaceutical Sciences, Food and Nutrition, Federal University of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
| | - Fernando de Almeida Borges
- School of Veterinary Medicine and Animal Science, Federal University of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
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Baiak BHB, Lehnen CR, da Rocha RA. Anthelmintic resistance in cattle: A systematic review and meta-analysis. Livest Sci 2018. [DOI: 10.1016/j.livsci.2018.09.022] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Economic viability of anthelmintic treatment in naturally infected beef cattle under different nutritional strategies after weaning. Parasitol Res 2018; 117:3993-4002. [DOI: 10.1007/s00436-018-6108-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Accepted: 10/01/2018] [Indexed: 10/28/2022]
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Immunity to gastrointestinal nematodes in ruminants: effector cell mechanisms and cytokines. J Parasit Dis 2018; 42:471-482. [PMID: 30538343 DOI: 10.1007/s12639-018-1023-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Accepted: 08/02/2018] [Indexed: 12/18/2022] Open
Abstract
Gastrointestinal nematodes (GINs) of ruminants are prevalent and have major economic impacts worldwide. The insight studies of immune responses triggered against GINs are of great concern to understand interaction between host's immune system and parasite. T-helper 2 cytokines drive the effector cell mechanisms which include eosinophils and mast cells. The immune responses are controlled by Th2 secreted interleukins (IL); IL3, IL-4, IL-5, IL-9, IL-10 and IL-13. B-Cell immune response is incorporated in defense mechanisms developed against GINs specially immunoglobulins (Ig); IgA, IgE and IgG. The immune resistance of the infected host is presented by failure of larval establishment or hypobiosis, low worm burden and decreased female fecundity. The host-parasite interaction is a complex series that affected by host's genetic constitution, nutrition, age and physiological status. The GINs have different immune evasion mechanisms to improve their survival within the host. Also, management of the host influences GINs parasitism. Thus, the aim of this review is to highlight the hallmarks of immune responses that endorse GINs parasitism. The insights studies of the triggered immune responses developed against GINs will improve the appropriate protective immune strategy.
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Lanusse C, Canton C, Virkel G, Alvarez L, Costa-Junior L, Lifschitz A. Strategies to Optimize the Efficacy of Anthelmintic Drugs in Ruminants. Trends Parasitol 2018; 34:664-682. [DOI: 10.1016/j.pt.2018.05.005] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 05/18/2018] [Accepted: 05/30/2018] [Indexed: 02/06/2023]
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Rashid MH, Vaughan JL, Stevenson MA, Campbell AJD, Beveridge I, Jabbar A. Anthelmintic resistance in gastrointestinal nematodes of alpacas (Vicugna pacos) in Australia. Parasit Vectors 2018; 11:388. [PMID: 29973276 PMCID: PMC6031175 DOI: 10.1186/s13071-018-2949-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Accepted: 06/12/2018] [Indexed: 11/18/2022] Open
Abstract
Background Gastrointestinal nematodes (GINs) can cause significant economic losses in alpacas due to lowered production of fibre and meat. Although no anthelmintics are registered for use in alpacas, various classes of anthelmintics are frequently used to control parasitic gastroenteritis in alpacas in Australia and other countries. Very little is known about the current worm control practices as well as the efficacy of anthelmintics used against common GINs of alpacas. This study aimed to assess the existing worm control practices used by Australian alpaca farmers and to quantify the efficacy of commonly used anthelmintics against GINs of alpacas. Methods An online questionnaire survey was conducted to assess current worm control practices on 97 Australian alpaca farms, with an emphasis on the use of anthelmintics. Of this group of 97 alpaca farms, 20 were selected to assess the efficacy of eight anthelmintics and/or their combinations (closantel, fenbendazole ivermectin, monepantel, moxidectin and a combination of levamisole, closantel, albendazole, abamectin) using the faecal egg count reduction test (FECRT). A multiplexed-tandem PCR (MT-PCR) was used to identify the prevalent nematode genera/species. Results The response rate for the questionnaire was 94% (91/97). Almost half of the respondents kept alpacas with sheep and cattle, and 26% of respondents allowed alpacas to co-graze with these ruminants. Although only 63% respondents perceived worms to be an important health concern for alpacas, the majority of respondents (89%) used anthelmintics to control GINs of alpacas. The commonly used anthelmintics were macrocyclic lactones, monepantel, benzimidazoles, levamisole, closantel and their combinations, and they were typically administered at the dose rate recommended for sheep. The FECRT results showed that a combination of levamisole, closantel, albendazole and abamectin was the most effective dewormer followed by single drugs, including monepantel, moxidectin, closantel, fenbendazole and ivermectin. Haemonchus spp. were the most commonly resistant nematodes followed by Trichostrongylus spp., Camelostrongylus mentulatus, Ostertagia ostertagi and Cooperia spp. Conclusions This is the first study aimed at assessing worm control practices and efficacy of commonly used anthelmintics in alpacas in Australia. Our findings document the extent of anthelmintics resistance on Australian alpaca farms and identify those anthelmintics that are still effective against GINs of alpacas. Electronic supplementary material The online version of this article (10.1186/s13071-018-2949-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Mohammed H Rashid
- Department of Veterinary Biosciences, Melbourne Veterinary School, The University of Melbourne, Werribee, Victoria, 3030, Australia
| | - Jane L Vaughan
- Cria Genesis, PO Box 406, Ocean Grove, Victoria, 3226, Australia
| | - Mark A Stevenson
- Department of Veterinary Biosciences, Melbourne Veterinary School, The University of Melbourne, Werribee, Victoria, 3030, Australia
| | - Angus J D Campbell
- Department of Veterinary Biosciences, Melbourne Veterinary School, The University of Melbourne, Werribee, Victoria, 3030, Australia
| | - Ian Beveridge
- Department of Veterinary Biosciences, Melbourne Veterinary School, The University of Melbourne, Werribee, Victoria, 3030, Australia
| | - Abdul Jabbar
- Department of Veterinary Biosciences, Melbourne Veterinary School, The University of Melbourne, Werribee, Victoria, 3030, Australia.
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Fontaine P, Choe K. The transcription factor SKN-1 and detoxification gene ugt-22 alter albendazole efficacy in Caenorhabditis elegans. INTERNATIONAL JOURNAL FOR PARASITOLOGY-DRUGS AND DRUG RESISTANCE 2018; 8:312-319. [PMID: 29793058 PMCID: PMC6039320 DOI: 10.1016/j.ijpddr.2018.04.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 04/18/2018] [Accepted: 04/22/2018] [Indexed: 11/29/2022]
Abstract
Parasitic nematodes infect over 1/4 th of the human population and are a major burden on livestock and crop production. Benzimidazole class anthelmintics are widely used to treat infections, but resistance is a widespread problem. Mutation of genes encoding the benzimidazole target β-tubulin is a well-established mechanism of resistance, but recent evidence suggests that metabolism of the drugs may also occur. Our objective was to investigate contributions of the detoxification-response transcription factor SKN-1 to anthelmintic drug resistance using C. elegans. We find that skn-1 mutations alter EC50 of the common benzimidazole albendazole in motility assays by 1.5–1.7 fold. We also identify ugt-22 as a detoxification gene associated with SKN-1 that influences albendazole efficacy. Mutation and overexpression of ugt-22 alter albendazole EC50 by 2.3–2.5-fold. The influence of a nematode UGT on albendazole efficacy is consistent with recent studies demonstrating glucose conjugation of benzimidazoles.
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Affiliation(s)
- Pauline Fontaine
- Department of Biology, University of Florida, Gainesville, FL 32611, USA
| | - Keith Choe
- Department of Biology, University of Florida, Gainesville, FL 32611, USA.
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Response of drug-susceptible and -resistant Haemonchus contortus larvae to monepantel and abamectin alone or in combination in vitro. Vet Parasitol 2017; 249:57-62. [PMID: 29279087 DOI: 10.1016/j.vetpar.2017.11.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Revised: 10/09/2017] [Accepted: 11/17/2017] [Indexed: 01/29/2023]
Abstract
There is an increasing interest in the use of combination anthelmintic products for the control of intestinal nematode parasites of livestock. These products are seen as attractive options for parasite control in the face of increasing levels of resistance to the different anthelmintic drug classes, as well as a means to slow the rate at which resistance develops to the individual components of the combination. With the recent introduction of an anthelmintic combination product containing abamectin and monepantel (at 1:12.5), we were interested in measuring the response of drug-susceptible and drug-resistant isolates of Haemonchus contortus to these two drugs alone and in combination, using larval development assays. The GWBII isolate showed resistance to abamectin (12-fold) alongside susceptibility to monepantel. The resistance ratio was reduced from 12- to 3.2-fold when the two drugs were combined. The MPL-R isolate was resistant to both drugs, with resistance factors of 6-fold towards abamectin, and 10.6- and 1008-fold towards monepantel in two sub-populations present in the isolate. This isolate showed 6.4-fold resistance to the drug combination. Hence, for both GWBII and MPL-R, the level of resistance towards the combination was reduced compared to the resistance towards abamectin or monepantel alone, respectively, but was not abolished. However, for GWBII, this in vitro resistance to the drug combination would be expected to have no impact on the in vivo efficacy of the combination drench product as the isolate is resistant to only the abamectin component of the drench, with monepantel remaining effective. On the other hand, the observed in vitro resistance to the combination shown by the MPL-R isolate is derived from significant levels of resistance towards both components separately, and hence may impact on in vivo efficacy of the combination. Isobologram analysis did not find any evidence for a synergistic interaction between the two drugs in larval development assays. We examined the predicted effects of varying the abamectin:monepantel ratio in drug combinations, assuming that the two drugs acted in an additive fashion. For GWBII, resistance to the drug combination was reduced to almost zero as the abamectin:monepantel ratio increased from 1:12.5 to 1:100, reflecting its resistance to only the abamectin component of the combination. For MPL-R, on the other hand, the resistance increased as the relative proportion of monepantel in the combination was increased, reflecting the extreme level of in vitro resistance shown by this isolate to monepantel.
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Ali MS, Saeed K, Rashid I, Ijaz M, Akbar H, Rashid M, Ashraf K. Anthelmintic Drugs: Their Efficacy and Cost-Effectiveness in Different Parity Cattle. J Parasitol 2017; 104:79-85. [PMID: 28976239 DOI: 10.1645/17-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Gastrointestinal nematodes are responsible for economic losses in bovines and are characterized by reduced milk production, decreased working efficiency, and even death. In our study, the effect of different anthelmintic treatments on nematode control in different parity cattle (Friesian crossbreds) at calving and their effect on milk yield were evaluated. The economics of anthelmintics and farm benefits in terms of increased milk production after deworming was also calculated. We screened cattle of first and second parity for nematodes. Animals were randomly selected in each group. In first parity animals, there were 23 positive cattle found, which were divided into 3 different groups, while in second parity animals there were 20 positive cattle which were also divided into 3 groups. For treatment of gastrointestinal nematodes, we used albendazole (velbazine) at 10 mg/kg body weight and levamisole (Nilverm®) at 7.5 mg/kg. In this study, both drugs were found effective in controlling nematode infections in cattle. Percentage reduction of eggs per gram (EPG) by albendazole was 48.20, 85.34, and 93.90% and 51.54, 81.43, 91.74% on day 7, 14, and 21 in first and second parity animals, respectively. Percentage reduction of EPG by levamisole was 44.45, 76.92, and 88.03% and 46.60, 73.78, 85.43% on day 7, 14, and 21 in first and second parity animals, respectively. The average increase in milk production in albendazole-treated groups was 0.39 and 0.92 L per day while increases in levamisole treated groups were 0.27 and 0.55 L per day in first and second parity cattle, respectively. After treatment, albendazole increased the milk fat by 0.07 and 0.1% while levamisole decreased by 0.02 and 0.05% in first and second parity cattle, respectively. It is concluded that anthelmintic treatments of recently calved cattle have a significant effect on milk production due to the nematode control. Milk production increased significantly in second parity cattle following anthelmintic treatment as compared to first parity animals. Levamisole had a negative effect on fat concentration in cattle while albendazole-treated cattle showed a positive effect. Albendazole has been found more efficient in reducing EPG of helminths in both parity animals as compared to levamisole-treated animals while the cost-benefit ratio of levamisole was greater than albendazole.
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Affiliation(s)
- Muhammad Saqib Ali
- Department of Parasitology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Khalid Saeed
- Department of Parasitology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Imran Rashid
- Department of Parasitology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Muhammad Ijaz
- Department of Parasitology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Haroon Akbar
- Department of Parasitology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Muhammad Rashid
- Department of Parasitology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Kamran Ashraf
- Department of Parasitology, University of Veterinary and Animal Sciences, Lahore, Pakistan
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Medicinal plants used as anthelmintics: Ethnomedical, pharmacological, and phytochemical studies. Eur J Med Chem 2017; 129:209-217. [DOI: 10.1016/j.ejmech.2017.02.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Revised: 01/06/2017] [Accepted: 02/04/2017] [Indexed: 12/26/2022]
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Peña-Espinoza M, Thamsborg SM, Denwood MJ, Drag M, Hansen TV, Jensen VF, Enemark HL. Efficacy of ivermectin against gastrointestinal nematodes of cattle in Denmark evaluated by different methods for analysis of faecal egg count reduction. Int J Parasitol Drugs Drug Resist 2016; 6:241-250. [PMID: 27835769 PMCID: PMC5107639 DOI: 10.1016/j.ijpddr.2016.10.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 10/10/2016] [Accepted: 10/12/2016] [Indexed: 12/05/2022]
Abstract
The efficacy of ivermectin (IVM) against gastrointestinal nematodes in Danish cattle was assessed by faecal egg count reduction test (FECRT). Six cattle farms with history of clinical parasitism and avermectin use were included. On the day of treatment (Day 0), 20 naturally infected calves per farm (total n = 120) were stratified by initial faecal egg counts (FEC) and randomly allocated to a treatment group dosed with 0.2 mg IVM kg-1 body weight s.c. (IVM; n = 10) or an untreated control group (CTL; n = 10). Individual FEC were obtained at Day 0 and Day 14 post-treatment and pooled faeces by group were cultured to isolate L3 for detection of Ostertagia ostertagi and Cooperia oncophora by qPCR. Treatment efficacies were analysed using the recommended WAAVP method and two open-source statistical procedures based on Bayesian modelling: 'eggCounts' and 'Bayescount'. A simulation study evaluated the performance of the different procedures to correctly identify FEC reduction percentages of simulated bovine FEC data representing the observed real data. In the FECRT, reduced IVM efficacy was detected in three farms by all procedures using data from treated animals only, and in one farm according to the procedures including data from treated and untreated cattle. Post-treatment, O. ostertagi and C. oncophora L3 were detected by qPCR in faeces of treated animals from one and three herds with declared reduced IVM efficacy, respectively. Based on the simulation study, all methods showed a reduced performance when FEC aggregation increased post-treatment and suggested that a treatment group of 10 animals is insufficient for the FECRT in cattle. This is the first report of reduced anthelmintic efficacy in Danish cattle and warrants the implementation of larger surveys. Advantages and caveats regarding the use of Bayesian modelling and the relevance of including untreated cattle in the FECRT are discussed.
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Affiliation(s)
- Miguel Peña-Espinoza
- Section for Bacteriology, Pathology and Parasitology, National Veterinary Institute, Technical University of Denmark, Bülowsvej 27, 1870 Frederiksberg C, Denmark.
| | - Stig M Thamsborg
- Department of Veterinary Disease Biology, Faculty of Health and Medical Sciences, University of Copenhagen, Dyrlægevej 100, 1870 Frederiksberg C, Denmark
| | - Matthew J Denwood
- Department of Large Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Grønnegårdsvej 8, 1870 Frederiksberg C, Denmark
| | - Markus Drag
- Section for Bacteriology, Pathology and Parasitology, National Veterinary Institute, Technical University of Denmark, Bülowsvej 27, 1870 Frederiksberg C, Denmark; Department of Large Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Grønnegårdsvej 8, 1870 Frederiksberg C, Denmark
| | - Tina V Hansen
- Department of Veterinary Disease Biology, Faculty of Health and Medical Sciences, University of Copenhagen, Dyrlægevej 100, 1870 Frederiksberg C, Denmark
| | - Vibeke F Jensen
- Section for Epidemiology, National Veterinary Institute, Technical University of Denmark, Bülowsvej 27, 1870 Frederiksberg C, Denmark
| | - Heidi L Enemark
- Section for Bacteriology, Pathology and Parasitology, National Veterinary Institute, Technical University of Denmark, Bülowsvej 27, 1870 Frederiksberg C, Denmark; Norwegian Veterinary Institute, Ullevålsveien 68, PO Box 750 Sentrum, N-0106, Oslo, Norway
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