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Castillo-Alcala F, Brown S, Crawshaw T, Laven RA, Riddle G, Lizarraga I. Urine retention in cattle putatively associated with injection of an ivermectin and closantel anthelmintic formulation into the ischiorectal fossa. N Z Vet J 2019; 67:148-154. [DOI: 10.1080/00480169.2019.1581112] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- F Castillo-Alcala
- School of Veterinary Science, Massey University, Palmerston North, New Zealand
| | - S Brown
- School of Veterinary Science, Massey University, Palmerston North, New Zealand
| | - T Crawshaw
- School of Veterinary Science, Massey University, Palmerston North, New Zealand
- Current address: School of Animal and Veterinary Science, Charles Sturt University, North Wagga, Australia
| | - RA Laven
- School of Veterinary Science, Massey University, Palmerston North, New Zealand
| | - G Riddle
- Bay of Islands Veterinary Services, Waipapa, New Zealand
| | - I Lizarraga
- School of Veterinary Science, Massey University, Palmerston North, New Zealand
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Zygocotyle lunata as a model for in vivo screening of anthelmintic activity against paramphistomes: Evaluation of efficacy of praziquantel, albendazole and closantel in experimentally infected mice. Exp Parasitol 2019; 199:74-79. [PMID: 30840851 DOI: 10.1016/j.exppara.2019.02.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Revised: 02/11/2019] [Accepted: 02/16/2019] [Indexed: 12/26/2022]
Abstract
Paramphistomes are important parasites in veterinary medicine. There are few anthelmintic drugs available against them. The development of new drugs is urgently needed and this process can be accelerated through the development of rodent models for in vivo testing. Among the few paramphistomes that develop in rodents is the caecal fluke Zygocotyle lunata, a species with which several biological studies have been performed over several decades. Nevertheless, its use as a model for evaluation of anthelmintic drugs had not yet been evaluated. In the present study, we evaluated the efficacy of praziquantel (PZQ 300 mg/kg 5x), albendazole (ABZ 200 mg/kg 5x) and closantel (CLO 50 mg/kg single dose, 50 mg/kg 3x and 25 mg/kg 3x) for treatment of mice experimentally infected with Z. lunata. The animals were infected with 20 metacercariae of the parasite and were treated 30 days post-infection. Untreated groups were maintained as controls. Seven days after the treatments, the animals were euthanized for recovery and counting of parasites. We found that PZQ and ABZ, at the dosages and therapeutic schedule employed here, did not cause significant alterations in worm burden [worm counts 16.0 ± 2.8 (13-19), 17.6 ± 2.1 (14-19) and 16.2 ± 1.9 (13-18) (p = 0.51) in PZQ, ALB and control, respectively]. CLO 50 mg/kg in a single dose caused significant reduction in the number of parasites [treated: 1.8 ± 0.9 (1-3); control: 15.6 ± 2.5 (12-19)], although it did not result in complete elimination of the parasites in any animal. Despite the fact that three doses of CLO 50 mg/kg or CLO 25 mg/kg caused complete elimination of the parasites in most surviving animals, there was significant host mortality. In general, results here obtained are concordant with those of studies performed on ruminant paramphistomes. Given that Z. lunata can be maintained in laboratory rodents, it is a suitable model for screening anthelmintic drugs against paramphistomes.
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Target animal safety testing of an oral salicylanilide suspension, oxyclozanide, for the treatment of fascioliasis in bovine in China. Regul Toxicol Pharmacol 2019; 103:21-33. [PMID: 30634022 DOI: 10.1016/j.yrtph.2019.01.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 11/26/2018] [Accepted: 01/02/2019] [Indexed: 11/21/2022]
Abstract
The aim of this study was to determine the potential toxicity risk of an oxyclozanide suspension to the target animal, bovine. In this experiment, 32 Simmental beef cattle were fattened and fed a full-price diet without antimicrobial agents. The test cattle were divided into 4 groups, which were treated with 0, 1, 3, and 5 times the recommended dosage through continuous intermittent oral administration at intervals of 2 days. The body weight of the cattle was recorded before and after the experiment, and the weight changes were calculated. The safety of the drugs was evaluated by weight gain, observation of clinical toxicity, haematology, clinical chemistry and histopathology. The results showed that the cattle had different degrees of diarrhoea, loss of appetite and depression after administration. The results of clinicopathology had no significant effect. The results of pathological examination showed that there was a certain degree of damage in the 5 times recommended dose group. The recommended dose was safe to use. Thus, the recommended dose should be given by a single oral administration to ensure the safe use of this drug in the clinic.
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Liu X, Xiao Y, Li JQ, Fu B, Qin Z. 1,1-Diaryl compounds as important bioactive module in pesticides. Mol Divers 2018; 23:809-820. [DOI: 10.1007/s11030-018-9895-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Accepted: 11/15/2018] [Indexed: 11/30/2022]
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Giles L, Orr J, Viora L, Gutierrez-Quintana R, Logue D, Guevar J. Ruminant neurological disease: a retrospective cohort study. Vet Rec 2017; 181:372-373. [PMID: 28874517 DOI: 10.1136/vr.104326] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 06/30/2017] [Accepted: 07/24/2017] [Indexed: 11/04/2022]
Abstract
Between January 2006 and June 2016, 96 ruminants with neurological signs were donated to the Scottish Centre for Production Animal Health and Food Safety (SCPAHFS), University of Glasgow, by veterinarians in the field representing 5.4 per cent of all submissions. Forty-seven different neurological presenting signs were reported with 79 per cent of the donated patients presenting with abnormal gait. All cases presenting with abnormalities in more than 4 out of 10 neurological categories died or were euthanased on welfare grounds. Calves were significantly more likely to present with neurological disorders than adult cattle compared with the proportion of calves: cows in the Scottish cattle population and total case population donated to SCPAHFS. Lesions were most commonly localised to the spinal cord in sheep 47 per cent (16), the peripheral nervous system in cattle 45 per cent (28) and to the brain in the overall population 41 per cent (39). The most common aetiology of neurological pathologies observed was infectious or inflammatory 28 per cent (27). Definitive diagnoses could be reached in 84 per cent (81) of patients. When postmortem reports were available, they produced a diagnosis in 70 per cent (52) of cases and contradicted clinical diagnoses in 38 per cent (26) of cases. The most frequently diagnosed conditions in ruminants over the 10 years were spastic paresis, vertebral osteomyelitis and listeriosis.
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Affiliation(s)
- Lucy Giles
- School of Veterinary Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Jayne Orr
- School of Veterinary Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Lorenzo Viora
- School of Veterinary Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Rodrigo Gutierrez-Quintana
- School of Veterinary Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - David Logue
- School of Veterinary Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Julien Guevar
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA
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Diseases of the Nervous System. Vet Med (Auckl) 2017. [PMCID: PMC7322266 DOI: 10.1016/b978-0-7020-5246-0.00014-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Efficacy of closantel against ivermectin- and fenbendazole-resistant Haemonchus sp. in sheep in Ontario, Canada. Vet Parasitol 2016; 228:30-41. [DOI: 10.1016/j.vetpar.2016.08.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Revised: 08/03/2016] [Accepted: 08/05/2016] [Indexed: 11/18/2022]
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Snoj T, Cebulj-Kadunc N, Kobal S. Does closantel in therapeutic doses display thyroid hormone-like activity in sheep? J Vet Pharmacol Ther 2014; 38:297-300. [PMID: 25410724 DOI: 10.1111/jvp.12188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Accepted: 10/28/2014] [Indexed: 11/28/2022]
Abstract
The aim of this study was to define the thyroid hormone-like activity of closantel in sheep by measuring some blood parameters that are known to be influenced by thyroid hormones triiodothyronine (T3) and thyroxine (T4). Our hypothesis was that, if closantel possesses thyroid hormone-like activity, its use under in vivo conditions will result in changes similar to those in hyperthyroidism. The study was conducted in 20 Jezersko-Solchava breed sheep. Blood sampling was performed before and 10 days after routine anthelmintic treatment with closantel. Complete blood count, plasma cholesterol, triglycerides, protein, and albumin levels, as well as those of serum T3 and T4, were compared before and 10 days after closantel administration. This routine anthelmintic treatment of sheep with closantel did not significantly influence hematological parameters, thyroid hormone levels, or most of the biochemical parameters. No evidence was found for thyroid hormone-like activity of closantel in sheep. However, significantly (P < 0.01) elevated levels of plasma triglycerides were present 10 days after closantel administration.
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Affiliation(s)
- T Snoj
- Institute of Physiology, Pharmacology and Toxicology, Veterinary Faculty, University of Ljubljana, Ljubljana, Slovenia
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Hannon FP, Ellis KA, Guevar J, Marchesi F, Geraghty T, Leach JDG. Closantel toxicity in a pregnant ewe at mid gestation: the pathological evaluation of the ewe and lamb nine months later. VETERINARY RECORD CASE REPORTS 2014. [DOI: 10.1136/vetreccr-2014-000113] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- Fergus Patrick Hannon
- Scottish Centre for Production Animal Health and Food SafetySchool of Veterinary MedicineCollege of Medical Veterinary and Life SciencesUniversity of Glasgow
| | - Kathryn Amanda Ellis
- Scottish Centre for Production Animal Health and Food SafetySchool of Veterinary MedicineCollege of Medical Veterinary and Life SciencesUniversity of Glasgow
| | - Julien Guevar
- School of Veterinary MedicineCollege of Medical Veterinary and Life SciencesUniversity of GlasgowBearsden RoadGlasgowG61 1QHUK
| | - Francesco Marchesi
- School of Veterinary MedicineCollege of Medical Veterinary and Life SciencesUniversity of GlasgowBearsden RoadGlasgowG61 1QHUK
| | - Timothy Geraghty
- Scottish Centre for Production Animal Health and Food SafetySchool of Veterinary MedicineCollege of Medical Veterinary and Life SciencesUniversity of Glasgow
| | - Joshua David George Leach
- School of Veterinary MedicineCollege of Medical Veterinary and Life SciencesUniversity of GlasgowBearsden RoadGlasgowG61 1QHUK
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Donya SM, Hassan EE. Clastogenic Effects of the Fasciolicides Closantel and Nitroxynil on Mice Somatic and Germ Cells. CYTOLOGIA 2007. [DOI: 10.1508/cytologia.72.29] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Souria M. Donya
- Department of Genetics and Cytology, National Research Center, Egypt
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Woodward KN. Veterinary pharmacovigilance. Part 3. Adverse effects of veterinary medicinal products in animals and on the environment. J Vet Pharmacol Ther 2005; 28:171-84. [PMID: 15842306 DOI: 10.1111/j.1365-2885.2005.00647.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Like humans, animals may experience adverse effects when treated with medicinal products. These effects may be related to the pharmacological or toxicological properties of the substances used or they may arise because of hypersensitivity. Veterinary medicinal products may also possess the ability to harm the environment. This paper reviews the potential of veterinary medicinal products to cause adverse effects in animals and on the environment.
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Affiliation(s)
- K N Woodward
- Schering-Plough Animal Health, Uxbridge, Middlesex, UK.
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Bacon JA, Ulrich RG, Davis JP, Thomas EM, Johnson SS, Conder GA, Sangster NC, Rothwell JT, McCracken RO, Lee BH, Clothier MF, Geary TG, Thompson DP. Comparative in vitro effects of closantel and selected beta-ketoamide anthelmintics on a gastrointestinal nematode and vertebrate liver cells. J Vet Pharmacol Ther 1998; 21:190-8. [PMID: 9673959 DOI: 10.1046/j.1365-2885.1998.00139.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
PNU-87407 and PNU-88509, beta-ketoamide anthelmintics that are structurally related to each other and to the salicylanilide anthelmintic closantel, exhibit different anthelmintic spectra and apparent toxicity in mammals. The basis for this differential pharmacology was examined in experiments that measured motility and adenosine triphosphate (ATP) levels in larval and adult stages of the gastrointestinal nematode, Haemonchus contortus, and in a vertebrate liver cell line and mitochondria. PNU-87407 and PNU-88509 both exhibited functional cross-resistance with closantel in larval migration assays using closantel-resistant and -sensitive isolates of H. contortus. Each compound reduced motility and ATP levels in cultured adult H. contortus in a concentration- and time-dependent manner; however, motility was reduced more rapidly by PNU-88509, and ATP levels were reduced by lower concentrations of closantel than the beta-ketoamides. Tension recordings from segments of adult H. contortus showed that PNU-88509 induces spastic paralysis, while PNU-87407 and closantel induce flaccid paralysis of the somatic musculature. Marked differences in the actions of these compounds were also observed in the mammalian preparations. In Chang liver cells, ATP levels were reduced after 3 h exposures to > or = 0.25 microM PNU-87407, > or = 1 microM closantel or > or = 10 microM PNU-88509. Reductions in ATP caused by PNU-88509 were completely reversible, while the effects of closantel and PNU-87407 were irreversible. PNU-87407, closantel and PNU-88509 uncoupled oxidative phosphorylation in isolated rat liver mitochondria, inhibiting the respiratory control index (with glutamate or succinate as substrate) by 50% at concentrations of 0.14, 0.9 and 7.6 microM, respectively.
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Affiliation(s)
- J A Bacon
- Pharmacia & Upjohn, Inc., Kalamazoo, MI 49001, USA
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