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Miranda-Muñoz K, Midkiff K, Woessner A, Afshar-Mohajer M, Zou M, Pollock E, Gonzalez-Nino D, Prinz G, Hutchinson L, Li R, Kompalage K, Culbertson CT, Tucker RJ, Coetzee H, Tsai T, Powell J, Almodovar J. A Multicomponent Microneedle Patch for the Delivery of Meloxicam for Veterinary Applications. ACS NANO 2024. [PMID: 39225687 DOI: 10.1021/acsnano.4c08072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/04/2024]
Abstract
This study evaluates the use of poly(vinyl alcohol), collagen, and chitosan blends for developing a microneedle patch for the delivery of meloxicam (MEL). Results confirm successful MEL encapsulation, structural integrity, and chemical stability even after ethylene oxide sterilization. Mechanical testing indicates the patch has the required properties for effective skin penetration and drug delivery, as demonstrated by load-displacement curves showing successful penetration of pig ear surfaces at 3N of normal load. In vitro imaging confirms the microneedle patch penetrates the pig's ear cadaver skin effectively and uniformly, with histological evaluation revealing the sustained presence and gradual degradation of microneedles within the skin. Additionally, in vitro drug diffusion experiments utilizing ballistic gel suggest that microneedles commence dissolution almost immediately upon insertion into the gel, steadily releasing the drug over 24 h. Furthermore, the microneedle patch demonstrates ideal drug release capabilities, achieving nearly 100% release of meloxicam content from a single patch within 18 h. Finally, in vivo studies using pigs demonstrate the successful dissolution and transdermal drug delivery efficacy of biodegradable microneedle patches delivering meloxicam in a porcine model, with over 70% of microneedles undergoing dissolution after 3 days. While low detectable meloxicam concentrations were observed in the bloodstream, high levels were detected in the ear tissue, confirming the release and diffusion of the drug from microneedles. This work highlights the potential of microneedle patches for controlled drug release in veterinary applications.
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Affiliation(s)
- Katherine Miranda-Muñoz
- Department of Biomedical Engineering, College of Engineering, University of Arkansas, Fayetteville, Arkansas 72701, United States
| | - Kirsten Midkiff
- Department of Animal Sciences, University of Arkansas, B110 Agriculture, Food and Life Sciences Building, Fayetteville, Arkansas 72701, United States
| | - Alan Woessner
- Department of Biomedical Engineering, College of Engineering, University of Arkansas, Fayetteville, Arkansas 72701, United States
- Arkansas Integrative Metabolic Research Center, University of Arkansas, Fayetteville, Arkansas 72701, United States
| | - Mahyar Afshar-Mohajer
- Department of Mechanical Engineering, University of Arkansas, 204 Mechanical Engineering Building, Fayetteville, Arkansas 72701, United States
| | - Min Zou
- Department of Mechanical Engineering, University of Arkansas, 204 Mechanical Engineering Building, Fayetteville, Arkansas 72701, United States
| | - Erik Pollock
- Department of Biological Sciences, University of Arkansas, Fayetteville, Science Engineering Building, Fayetteville, Arkansas 72701, United States
| | - David Gonzalez-Nino
- Department of Civil Engineering, University of Arkansas, 4190 Bell Engineering Center, Fayetteville, Arkansas 72701, United States
| | - Gary Prinz
- Department of Civil Engineering, University of Arkansas, 4190 Bell Engineering Center, Fayetteville, Arkansas 72701, United States
| | - Lillian Hutchinson
- Ralph E. Martin Department of Chemical Engineering, University of Arkansas, 3202 Bell Engineering Center, Fayetteville, Arkansas 72701, United States
| | - Ruohan Li
- Ralph E. Martin Department of Chemical Engineering, University of Arkansas, 3202 Bell Engineering Center, Fayetteville, Arkansas 72701, United States
| | - Kushan Kompalage
- Department of Anatomy and Physiology, College of Veterinary Medicine, Kansas State University, 213 CBC Building, 1212 Mid-Campus Dr North, Manhattan, Kansas 66506, United States
| | - Christopher T Culbertson
- Department of Chemistry, Kansas State University, 228 Coles Hall, 1710 Denison Ave, Manhattan, Kansas 66506, United States
| | - Ryan Jared Tucker
- Department of Anatomy and Physiology, College of Veterinary Medicine, Kansas State University, 213 CBC Building, 1212 Mid-Campus Dr North, Manhattan, Kansas 66506, United States
| | - Hans Coetzee
- Department of Anatomy and Physiology, College of Veterinary Medicine, Kansas State University, 213 CBC Building, 1212 Mid-Campus Dr North, Manhattan, Kansas 66506, United States
| | - Tsung Tsai
- Department of Animal Sciences, University of Arkansas, B110 Agriculture, Food and Life Sciences Building, Fayetteville, Arkansas 72701, United States
| | - Jeremy Powell
- Department of Animal Sciences, University of Arkansas, B110 Agriculture, Food and Life Sciences Building, Fayetteville, Arkansas 72701, United States
| | - Jorge Almodovar
- Department of Biomedical Engineering, College of Engineering, University of Arkansas, Fayetteville, Arkansas 72701, United States
- Ralph E. Martin Department of Chemical Engineering, University of Arkansas, 3202 Bell Engineering Center, Fayetteville, Arkansas 72701, United States
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Zoltick AH, Mann S, Coetzee JF. Pain pathophysiology and pharmacology of cattle: how improved understanding can enhance pain prevention, mitigation, and welfare. FRONTIERS IN PAIN RESEARCH 2024; 5:1396992. [PMID: 39258013 PMCID: PMC11385012 DOI: 10.3389/fpain.2024.1396992] [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: 03/06/2024] [Accepted: 07/29/2024] [Indexed: 09/12/2024] Open
Abstract
Globally, humans rely on cattle for food production; however, there is rising societal concern surrounding the welfare of farm animals. From a young age, cattle raised for dairy and beef production experience pain caused by routine management procedures and common disease conditions. The fundamental mechanisms, nociceptive pathways, and central nervous system structures required for pain perception are highly conserved among mammalian species. However, there are limitations to a comparative approach to pain assessment due to interspecies differences in the expression of pain. The stoicism of prey species may impede pain identification and lead to the assumption that cattle lack pain sensitivity. This highlights the importance of establishing validated bovine-specific indicators of pain-a prerequisite for evidence-based pain assessment and mitigation. Our first objective is to provide an overview of pain pathophysiology to illustrate the importance of targeted analgesia in livestock medicine and the negative welfare outcomes associated with unmitigated pain. This is followed by a review of available analgesics, the regulations governing their use, and barriers to implementation of on-farm pain management. We then investigate the current research undertaken to evaluate the pain response in cattle-a critical aspect of the drug approval process. With an emphasis on emerging research in animal cognition and pain pathology, we conclude by discussing the significant influence that pain has on cattle welfare and areas where further research and modified practices are indicated.
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Affiliation(s)
- Abigale H Zoltick
- Department of Clinical Studies, University of Pennsylvania School of Veterinary Medicine, Kennett Square, PA, United States
- Department of Population Medicine and Diagnostic Sciences, Cornell University College of Veterinary Medicine, Ithaca, NY, United States
| | - Sabine Mann
- Department of Population Medicine and Diagnostic Sciences, Cornell University College of Veterinary Medicine, Ithaca, NY, United States
| | - Johann F Coetzee
- Department of Anatomy and Physiology, Kansas State University, Manhattan, KS, United States
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Roche SM, Renaud DL, Saraceni J, Kelton DF, DeVries TJ. Invited review: Prevalence, risk factors, treatment, and barriers to best practice adoption for lameness and injuries in dairy cattle-A narrative review. J Dairy Sci 2024; 107:3347-3366. [PMID: 38101730 DOI: 10.3168/jds.2023-23870] [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: 06/14/2023] [Accepted: 11/08/2023] [Indexed: 12/17/2023]
Abstract
Lameness and leg injuries are both painful and prevalent across the dairy industry, and are a major welfare concern. There has been a considerable amount of research focused on investigating the risk factors associated with lameness and injuries and how they might be prevented and treated. The objectives of this narrative review were to summarize herd-level prevalence estimates, risk factors, strategies for prevention, control, and treatment of these conditions, and the barriers to best practice adoption for lameness and injuries on dairy farms. There is a relatively high within-herd prevalence of lameness on dairy farms globally, with a recent systematic review estimating the mean prevalence at 22.8%. Similarly, there is a relatively high prevalence of hock injuries, with within-herd estimates ranging from 12% to 81% of cows affected. Knee and neck injuries have been reported to be less common, with 6% to 43% and 1% to 33%, respectively. Numerous risk factors have been associated with the incidence of lameness, notably housing (e.g., access to pasture, bedding depth, bedding type, flooring type, stall design), management (e.g., stall cleanliness, frequency of trimming, holding times, stocking density), and cow-level (e.g., body condition, parity, injured hocks) factors. Risk factors associated with hock injuries can be similarly classified into housing (e.g., bedding type and depth, outdoor access, parlor type, stall design), management (e.g., bedding depth, cleanliness), and cow (e.g., parity, days in milk, lameness) factors. Key preventative approaches for lameness include routine preventative and corrective hoof trimming, improving hoof cushioning and traction through access to pasture or adding rubber flooring, deep-bedded stalls, sand bedding, ensuring appropriate stocking densities, reduced holding times, and the frequent use of routine footbaths. Very little research has been conducted on hock, knee, and neck injury prevention and recovery. Numerous researchers have concluded that both extrinsic (e.g., time, money, space) and intrinsic (e.g., farmer attitude, perception, priorities, and mindset) barriers exist to addressing lameness and injuries on dairy farms. There are many diverse stakeholders in lameness and injury management including the farmer, farm staff, veterinarian, hoof trimmer, nutritionist, and other advisors. Addressing dairy cattle lameness and injuries must, therefore, consider the people involved, as it is these people who are influencing and implementing on-farm decisions related to lameness prevention, treatment, and control.
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Affiliation(s)
- S M Roche
- Department of Population Medicine, University of Guelph, Guelph, ON, Canada, N1G 2W1; ACER Consulting Ltd., Guelph, ON, Canada, N1G 5L3
| | - D L Renaud
- Department of Population Medicine, University of Guelph, Guelph, ON, Canada, N1G 2W1
| | - J Saraceni
- ACER Consulting Ltd., Guelph, ON, Canada, N1G 5L3
| | - D F Kelton
- Department of Population Medicine, University of Guelph, Guelph, ON, Canada, N1G 2W1
| | - T J DeVries
- Department of Animal Biosciences, University of Guelph, Guelph, ON, Canada, N1G 2W1.
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Roche SM, Ralston BJ, Olson B, Sharpe BD, Schatz C, Beaugrand K, Ross JA, Broomfield MA, Allan N, Olson M. Efficacy of a Lidocaine-Impregnated Elastrator Band for Castration and Tail Docking in Lambs. Animals (Basel) 2024; 14:1403. [PMID: 38791621 PMCID: PMC11117278 DOI: 10.3390/ani14101403] [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: 03/03/2024] [Revised: 04/26/2024] [Accepted: 04/29/2024] [Indexed: 05/26/2024] Open
Abstract
The primary objective of this study was to demonstrate the non-inferiority between lidocaine-impregnated ligation bands (LLBs) and control bands (CBs) with respect to the efficacy of castration and tail docking. Secondary objectives were to compare castration and tail-docking success, evaluate local site reactions, and compare average daily gain (ADG) between the treatment groups. A total of 238 male lambs were enrolled and randomly assigned to receive LLBs or CBs on their tail and scrotum. Lambs were weighed, had a health assessment, and the band site was observed on -3, 7, 14, 21, 28, 35, and 42 days after the bands were applied. A linear regression model was built to assess average daily gain, whereas a repeated measures model was used to evaluate body weight differences at each of the measured timepoints. Furthermore, logistic regression models were used to evaluate associations with casting outcomes. Few differences were noted between treatment groups with respect to casting success for the scrotum and tail and ADG over the entire experimental period. Non-inferiority calculations demonstrated no differences in tail docking and scrotal casting success, with casting occurring for the majority of animals by d 21 and d 42 for castration and tail docking, respectively. However, lambs receiving LLBs gained more weight from d -3 to 7 (+0.03 kg/d; 95% CI: 0 to 0.07), which may be an indication of effective pain control during the first week following band application. Overall, the use of an LLB does not affect the time to successful casting of the tail and could improve short-term growth when compared to a control band. Further studies are needed to compare LLBs to multimodal methods of pain relief.
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Affiliation(s)
| | - Brenda J. Ralston
- Applied Research Team, Lakeland College, Vermilion, AB T9X 1K5, Canada;
| | - Barbara Olson
- Alberta Veterinary Laboratories, Calgary, AB T2C 5N6, Canada; (B.O.); (M.O.)
| | | | - Crystal Schatz
- Chinook Contract Research Inc., Airdrie, AB T4A 0C3, Canada; (C.S.); (K.B.); (J.A.R.); (N.A.)
| | - Kendall Beaugrand
- Chinook Contract Research Inc., Airdrie, AB T4A 0C3, Canada; (C.S.); (K.B.); (J.A.R.); (N.A.)
| | - Joseph A. Ross
- Chinook Contract Research Inc., Airdrie, AB T4A 0C3, Canada; (C.S.); (K.B.); (J.A.R.); (N.A.)
| | | | - Nicolas Allan
- Chinook Contract Research Inc., Airdrie, AB T4A 0C3, Canada; (C.S.); (K.B.); (J.A.R.); (N.A.)
| | - Merle Olson
- Alberta Veterinary Laboratories, Calgary, AB T2C 5N6, Canada; (B.O.); (M.O.)
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Hyndman TH, Bowden RS, Woodward AP, Pang DSJ, Hampton JO. Uncontrolled pain: a call for better study design. Front Vet Sci 2024; 11:1328098. [PMID: 38420206 PMCID: PMC10899387 DOI: 10.3389/fvets.2024.1328098] [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: 10/26/2023] [Accepted: 01/02/2024] [Indexed: 03/02/2024] Open
Abstract
Studies assessing animal pain in veterinary research are often performed primarily for the benefit of animals. Frequently, the goal of these studies is to determine whether the analgesic effect of a novel treatment is clinically meaningful, and therefore has the capacity to improve the welfare of treated animals. To determine the treatment effect of a potential analgesic, control groups are necessary to allow comparison. There are negative control groups (where pain is unattenuated) and positive control groups (where pain is attenuated). Arising out of animal welfare concerns, there is growing reluctance to use negative control groups in pain studies. But for studies where pain is experimentally induced, the absence of a negative control group removes the opportunity to demonstrate that the study methods could differentiate a positive control intervention from doing nothing at all. For studies that are controlled by a single comparison group, the capacity to distinguish treatment effects from experimental noise is more difficult; especially considering that pain studies often involve small sample sizes, small and variable treatment effects, systematic error and use pain assessment measures that are unreliable. Due to these limitations, and with a focus on farm animals, we argue that many pain studies would be enhanced by the simultaneous inclusion of positive and negative control groups. This would help provide study-specific definitions of pain and pain attenuation, thereby permitting more reliable estimates of treatment effects. Adoption of our suggested refinements could improve animal welfare outcomes for millions of animals globally.
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Affiliation(s)
- Timothy H. Hyndman
- School of Veterinary Medicine, Murdoch University, Murdoch, WA, Australia
- Harry Butler Research Institute, Murdoch University, Murdoch, WA, Australia
| | - Ross S. Bowden
- School of Mathematics, Statistics, Chemistry and Physics, Murdoch University, Murdoch, WA, Australia
| | | | - Daniel S. J. Pang
- Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
| | - Jordan O. Hampton
- Harry Butler Research Institute, Murdoch University, Murdoch, WA, Australia
- Faculty of Science, University of Melbourne, Parkville, VIC, Australia
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Martinez A, Donoso E, Hernández RO, Sanchez JA, Romero MH. Assessment of animal welfare in fattening pig farms certified in good livestock practices. J APPL ANIM WELF SCI 2024; 27:33-45. [PMID: 38314792 DOI: 10.1080/10888705.2021.2021532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Commercial swine producers are responsible for implementing changes in their production systems to ensure animal welfare. The objective of this study is to evaluate the levels of animal welfare on rearing and fattening farms certified in good animal husbandry practices using the Welfare Quality® protocol. Eighty-one certified commercial farms (n = 2,150 pigs), distributed in six geographical areas of Colombia, were evaluatedby six trained veterinarians. . A multilevel analysis was performed to identify variables associated with the animal welfare/farm rating and to identify behavioral variables. Farms evaluated had an enhanced (n = 68, 83.9%), followed by excellent (n = 7, 8.7%) and acceptable (n = 6, 7.4%) level of animal welfare. Variables significantly associated with the overall protocol rating (R2 = 0.37) were temperature comfort (OR: 1.05, p = 0.008), absence of disease (OR: 1.06, p = 0.02) and absence of pain (OR: 1.06, p = 0.0001). Significant differences in behavioral measures were observed across farms (P < 0.05). The high animal welfare scores of certified farms suggest changes in producers' understanding and attitudes towards production and animal welfare.
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Affiliation(s)
- Andrea Martinez
- Porkcolombia Association-FNP. Animal Welfare Program, Bogota, Colombia
| | - Eliana Donoso
- Porkcolombia Association-FNP. Animal Welfare Program, Bogota, Colombia
| | - Rick Obrian Hernández
- Cienvet Group. Faculty of Agrarian and Animal Sciences, University of Caldas, Manizales, Colombia
| | - Jorge A Sanchez
- Department of Animal Health, Faculty of Agrarian and Animal Sciences, University of Caldas, Manizales, Colombia
| | - Marlyn H Romero
- Department of Animal Health, Faculty of Agrarian and Animal Sciences, University of Caldas, Manizales, Colombia
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Mijares S, Edwards-Callaway L, Roman-Muniz IN, Coetzee JF, Applegate TJ, Cramer MC. Veterinarians' perspectives of pain, treatment, and diagnostics for bovine respiratory disease in preweaned dairy calves. FRONTIERS IN PAIN RESEARCH 2023; 4:1076100. [PMID: 36910252 PMCID: PMC9997724 DOI: 10.3389/fpain.2023.1076100] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 01/20/2023] [Indexed: 02/25/2023] Open
Abstract
Background Bovine Respiratory Disease (BRD) is a leading cause of morbidity and mortality in preweaned dairy calves. Early detection and therefore treatment are essential to minimize animal welfare concerns, particularly given that recent research also demonstrates that BRD is painful. Veterinarians are essential to ensuring calves with BRD receive appropriate treatment, but little to no research exists regarding veterinarians' perspectives about BRD detection and treatment in dairy calves. This is a critical step to determine education and outreach needs that can target BRD treatment to improve calf welfare. Thus, the objectives of the current study were to describe US veterinarians' current detection methods and treatment practices for BRD in preweaned dairy calves, understand veterinarians' rationale for treatment decisions, and identify gaps in knowledge regarding treatment and management of calf BRD. Methods An online survey was sent to two veterinarian-focused list-serves and newsletter. Final responses (n = 47) were analyzed using qualitative and quantitative analyses. Results On-farm necropsy was the diagnostic tool most considered "extremely important" (26, 55.3%). All veterinarians indicated that BRD was at least mildly painful. However, only 53% of veterinarians (n = 25) assess pain in preweaned calves with BRD in order to make treatment decisions. Furthermore, of the veterinarians that assessed pain, 40% (n = 10) reported that their knowledge of pain assessment and treatment was adequate, but most (n = 24) considered a calf's pain-level at least "moderately important" to make BRD treatment decisions. The most important ancillary therapy for antimicrobials were NSAIDs (21, 44.7%). The ancillary therapy most often considered "extremely important" for treating BRD was NSAIDs. Qualitative analysis identified the following as factors that influenced veterinarians' willingness to provide analgesia: the farm's willingness to administer drugs, clinical signs, perceived severity of pain, the need for anti-inflammatories, and the presence of fever and comorbidities. Discussion This study included a small sample size and an extremely low response rate; results should therefore be interpreted with caution. Despite this limitation, important gaps in knowledge were identified, including pain assessment and consideration when making treatment decisions, and diagnostic tools. Addressing these needs in future research and outreach efforts could help ensure appropriate and timely treatment of calf BRD, including pain mitigation.
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Affiliation(s)
- S Mijares
- Department of Animal Sciences, Colorado State University, Fort Collins, CO, United States
| | - L Edwards-Callaway
- Department of Animal Sciences, Colorado State University, Fort Collins, CO, United States
| | - I N Roman-Muniz
- Department of Animal Sciences, Colorado State University, Fort Collins, CO, United States
| | - J F Coetzee
- Department of Anatomy and Physiology, Kansas State University, Manhattan, KS, United States
| | - T J Applegate
- Department of Clinical Sciences, Colorado State University, Fort Collins, CO, United States
| | - M C Cramer
- Department of Animal Sciences, Colorado State University, Fort Collins, CO, United States
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Flunixin Meglumine Is Superior to Meloxicam for Providing Analgesia after Surgical Castration in 2-Month-Old Goats. Animals (Basel) 2022; 12:ani12233437. [PMID: 36496957 PMCID: PMC9736442 DOI: 10.3390/ani12233437] [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: 10/27/2022] [Revised: 12/01/2022] [Accepted: 12/01/2022] [Indexed: 12/12/2022] Open
Abstract
Farm animals are exposed to various painful procedures during their productive lives, making it necessary to implement anesthetic and analgesic protocols. However, there are few studies evaluating the effectiveness of these drugs. Our objective was to compare the analgesic effects of two nonsteroidal anti-inflammatory drugs (NSAIDs): meloxicam (MEL) and flunixin meglumine (FLU), in goat kids subjected to surgical castration under local anesthesia. Anglo-Nubian goat kids (60 days old) were allocated into two groups: MEL (n = 9), and FLU (n = 8), each administered 5 min before starting castration. All had been previously subjected to local anesthesia with lidocaine, injected bilaterally into the testes, plus subcutaneous in the scrotal raphe. Pain sensitivity was evaluated using the von Frey monofilaments test. Reactions were recorded before castration (M0), immediately after castration (M1), and once-daily for three consecutive days post-castration (M2, M3, and M4, respectively). Pain assessments were conducted in three body regions: at four points of the scrotum (dorsal and ventral; left and right lateral; R1); medial region of the pelvic limb, gracilis muscle (R2); and hypogastric region of the abdomen (R3). MEL goats had considerably greater pain reaction in R1 and R2 over time, mainly in M2; therefore, FLU was a more effective analgesic than MEL, resulting in less pain reaction.
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Lopez-Soriano M, Rocha Merenda V, Esteves Trindade PH, Loureiro Luna SP, Pairis-Garcia MD. Efficacy of transdermal flunixin in mitigating castration pain in piglets. FRONTIERS IN PAIN RESEARCH 2022; 3:1056492. [DOI: 10.3389/fpain.2022.1056492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 10/25/2022] [Indexed: 11/12/2022] Open
Abstract
Castration is a painful procedure performed in swine and to date, there are no approved products available in the US to alleviate this pain. Previous work evaluating the efficacy of flunixin meglumine has shown promise in mitigating pain in swine, but no work to date has evaluated transdermal flunixin efficacy in mitigating castration pain in piglets. Therefore, the objective of this study was to evaluate the efficacy of transdermal flunixin (TDF) in mitigating castration pain utilizing a previously validated behavioral pain scale. A total of 98 Large White x Duroc cross male piglets from 98 litters were enrolled in this study. Piglets were randomly assigned to the following treatments: (1) TDF plus castration (3.33 mg/kg; CF; n = 24), (2) TDF plus sham castration (3.33 mg/kg; SF; n = 26), (3) topical physiological saline plus sham castration (S; n = 24), or (4) topical physiological saline plus castration (C; n = 24). All treatments were administered 24 h prior to castration. Four-min continuous videos clips were collected 24 h before castration (−24 h), immediately post-castration (0 h), and 24 h post-castration (+24 h). Video clips were then observed and scored by one trained observer using a 4-point pain scale (score 0–3) encompassing the five behavioral domains of the pig acute pain scale (UPAPS). Total pain score averages were analyzed as repeated measures by analysis of variance applying a multilevel model. The UPAPS effectively distinguished varying levels of painful and non-painful states in castrated piglets as observed via deviations in total pain scores across timepoints (P < 0.0001), treatment (P < 0.001) and treatment*timepoint (P < 0.0001). Immediately post-castration (0 h), piglets in the C and CF group demonstrated greater total average pain scores than piglets in the S (P < 0.03) and SF (P < 0.01) groups and castrated piglets treated with TDF demonstrated lower total pain scores (P < 0.05) and required less analgesic intervention immediately post-castration compared to castrated piglets receiving no treatment (P < 0.0001). For C group 54% required rescue analgesia compared to 29%, 8% and 0% for CF, SF and S piglets respectively. Future work should evaluate implementation of this pain management protocol on a wide scale commercial farm setting.
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Role of Topical Anaesthesia in Pain Management of Farm Animals, a Changing Paradigm. Animals (Basel) 2022; 12:ani12182459. [PMID: 36139319 PMCID: PMC9495143 DOI: 10.3390/ani12182459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 09/08/2022] [Accepted: 09/14/2022] [Indexed: 11/17/2022] Open
Abstract
Field evidence indicates that livestock producers are motivated by access to products that readily deliver pain management during husbandry interventions and, more recently, viral epidermal infectious diseases, including FMD. There has been impressive adoption in Australia of a farmer-applied spray-on topical anaesthetic wound formulation (TAF; Tri-Solfen®, Medical Ethics, Australia), initially for managing pain of the breech modification ‘mulesing’ procedure that reduces susceptibility of sheep to flystrike. Over 120 million lambs have now received pain relief and cattle producers have commenced using the TAF for a range of husbandry procedures. This product has demonstrated efficacy for surgical castration and tail docking of lambs, surgical castration and dehorning of calves, surgical castration of piglets, debridement of lesions of the hoof for lame cattle and, importantly, treatment of clinical FMD lesions, including decubitus ulcerations occurring from prolonged recumbency. Multimodal use of an NSAID for improved pain management is advocated, particularly meloxicam, available by prescription from veterinarians for injection and as an oral formulation (Ilium Buccalgesic®, Troy Laboratories, Australia), with current work assessing the potential for prolonged delivery in molasses blocks. Increased use of TAF with NSAIDs significantly reduces pain and suffering in livestock, with enhanced healing of FMD lesions, reduced viral loads from Orf infections in lambs and diminished necessity of ‘antibiotic cover’, assisting antimicrobial-resistance (AMR) stewardship.
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Biodegradable microneedle patch for delivery of meloxicam for managing pain in cattle. PLoS One 2022; 17:e0272169. [PMID: 35917312 PMCID: PMC9345335 DOI: 10.1371/journal.pone.0272169] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 07/13/2022] [Indexed: 11/20/2022] Open
Abstract
Microneedle patches are a promising source for transdermal diffusion of macromolecules and are designed to painlessly penetrate the skin. In this study, a biodegradable chitosan microneedle patch to deliver meloxicam for managing pain in cattle was tested. The potential of reuse of the polymeric solution to fabricate the patches, optimization of fabrication, morphological analysis of the microneedle patch and analysis of preservation of the chemical composition after sterilization were evaluated. In-vitro analysis consisted of studying in-vitro penetration mechanical properties, compression testing analysis of microneedle patch, and in-vitro drug release analysis. In-vivo studies were performed to analyze the dissolution capability of the microneedle patch. Results regarding the physical characteristics, chemical composition, and mechanical properties confirmed that rheological properties of the chitosan solution, present significant differences over time, demonstrating that reusing the solution on the fourth day results in failure patches. Morphological characteristics and chemical composition studies revealed that the process of sterilization (ethylene oxide gas) needed for implanting the patches into the skin did not affect the properties of microneedle patches. In-vitro studies showed that approximately 33.02 ± 3.88% of the meloxicam was released over 7 days. A full penetration of the microneedles into the skin can be obtained by applying approximately 3.2 N. In-vivo studies demonstrated that microneedle patches were capable of swelling and dissolving, exhibiting a dissolution percentage of more than 50% of the original height of microneedle after 7 days. No abnormal tissue, swelling, or inflammation was observed in the implanted area. The results of this work show that chitosan biodegradable microneedle patches may be useful to deliver meloxicam to improve pain management of cattle with positive effects for commercial manufacturing.
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12
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Johnston CH, Whittaker AL, Franklin SH, Hutchinson MR. The Neuroimmune Interface and Chronic Pain Through the Lens of Production Animals. Front Neurosci 2022; 16:887042. [PMID: 35663552 PMCID: PMC9160236 DOI: 10.3389/fnins.2022.887042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 04/13/2022] [Indexed: 11/13/2022] Open
Abstract
Communication between the central nervous system (CNS) and the immune system has gained much attention for its fundamental role in the development of chronic and pathological pain in humans and rodent models. Following peripheral nerve injury, neuroimmune signaling within the CNS plays an important role in the pathophysiological changes in pain sensitivity that lead to chronic pain. In production animals, routine husbandry procedures such as tail docking and castration, often involve some degree of inflammation and peripheral nerve injury and consequently may lead to chronic pain. Our understanding of chronic pain in animals is limited by the difficulty in measuring this pathological pain state. In light of this, we have reviewed the current understanding of chronic pain in production animals. We discuss our ability to measure pain and the implications this has on animal welfare and production outcomes. Further research into the neuroimmune interface in production animals will improve our fundamental understanding of chronic pain and better inform human clinical pain management and animal husbandry practices and interventions.
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Affiliation(s)
- Charlotte H. Johnston
- Faculty of Health Sciences, Adelaide Medical School, University of Adelaide, Adelaide, SA, Australia
| | - Alexandra L. Whittaker
- School of Animal and Veterinary Sciences, University of Adelaide, Roseworthy, SA, Australia
| | - Samantha H. Franklin
- School of Animal and Veterinary Sciences, University of Adelaide, Roseworthy, SA, Australia
- Equine Health and Performance Centre, University of Adelaide, Roseworthy, SA, Australia
| | - Mark R. Hutchinson
- Faculty of Health Sciences, Adelaide Medical School, University of Adelaide, Adelaide, SA, Australia
- Australian Research Council Centre of Excellence for Nanoscale BioPhotonics, University of Adelaide, Adelaide, SA, Australia
- Davies Livestock Research Centre, University of Adelaide, Roseworthy, SA, Australia
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Ríos‐Álvarez E, Serra CI, García de Carellán Mateo A. Repeated ultrasound‐guided saphenous and sciatic nerve block in a calf with tibial comminuted fracture undergoing surgical stabilisation. VETERINARY RECORD CASE REPORTS 2022. [DOI: 10.1002/vrc2.314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Elena Ríos‐Álvarez
- Hospital Veterinario UCV Departamento de Medicina y Cirugía Animal Facultad de Veterinaria y Ciencias Experimentales Universidad Católica de Valencia San Vicente Mártir Valencia Spain
| | - C. Iván Serra
- Hospital Veterinario UCV Departamento de Medicina y Cirugía Animal Facultad de Veterinaria y Ciencias Experimentales Universidad Católica de Valencia San Vicente Mártir Valencia Spain
| | - Alejandra García de Carellán Mateo
- Hospital Veterinario UCV Departamento de Medicina y Cirugía Animal Facultad de Veterinaria y Ciencias Experimentales Universidad Católica de Valencia San Vicente Mártir Valencia Spain
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Mainau E, Llonch P, Temple D, Goby L, Manteca X. Alteration in Activity Patterns of Cows as a Result of Pain Due to Health Conditions. Animals (Basel) 2022; 12:ani12020176. [PMID: 35049798 PMCID: PMC8773241 DOI: 10.3390/ani12020176] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 01/10/2022] [Accepted: 01/10/2022] [Indexed: 12/15/2022] Open
Abstract
Simple Summary There are several conditions and diseases considered painful to cattle. One reason for the inconsistency in pain recognition and thus pain relief in cattle is the inadequate ability to identify and assess pain. In fact, both increased and/or reduced daily lying time can be indicative of pain in cattle. This review helps to properly interpret pain in cows through behavioural activity patterns and explores whether pain relief is capable to restore their normal activity. Abstract The main conditions and diseases considered painful in dairy cows are mastitis, lameness, calving (including dystocia and caesarean section) and metritis. The cattle literature reports that deviation from normal daily activity patterns (both increased and/or reduced daily lying time) can be indicative of painful conditions and diseases in cows. This narrative review discusses on how pain due to several health conditions in dairy cows modifies its activity pattern and explores if non-steroidal anti-inflammatory drugs (NSAIDs) are capable of restoring it. Divergent outcomes may differ depending upon the painful cause, the severity and the moment, and consequently its interpretation should be properly explained. For instance, cows with clinical mastitis reduced their time lying and increased the number of lying bouts and stepping due to pain caused by the swollen udder when cows are lying. However, lame cows show longer lying times, with a lower number of lying bouts and longer and more variable lying bouts duration, as compared to non-lame cows. When the relationship between painful disorders and daily activity patterns is studied, factors such as parity, bedding type and severity of disease are important factors to take into consideration. The potential benefits of the NSAIDs treatment in painful health disorders depend upon the type of drug administered, its dosage and administration mode, and the time of administration relative to the painful health disorder. This narrative review can be used as a tool to properly interpret and grade pain in cows through behavioural activity patterns and proposes directions for future investigations.
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Affiliation(s)
- Eva Mainau
- AWEC Advisors SL, Ed. Eureka, Parc de Recerca de la UAB, Bellaterra, 08193 Barcelona, Spain
- Correspondence: ; Tel.: +34-935811352
| | - Pol Llonch
- Department of Animal and Food Science, Autonomous University of Barcelona, Bellaterra, 08193 Barcelona, Spain; (P.L.); (D.T.); (X.M.)
| | - Déborah Temple
- Department of Animal and Food Science, Autonomous University of Barcelona, Bellaterra, 08193 Barcelona, Spain; (P.L.); (D.T.); (X.M.)
| | - Laurent Goby
- Boehringer Ingelheim Vetmedica GmbH, Binger Str. 173, 55216 Ingelheim am Rhein, Germany;
| | - Xavier Manteca
- Department of Animal and Food Science, Autonomous University of Barcelona, Bellaterra, 08193 Barcelona, Spain; (P.L.); (D.T.); (X.M.)
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15
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Campler MR, Cox JL, Walker HL, Arruda AG. Description of on-farm treatment compliance and risk factors for culling in sows. Porcine Health Manag 2021; 7:59. [PMID: 34823594 PMCID: PMC8613945 DOI: 10.1186/s40813-021-00238-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Accepted: 11/17/2021] [Indexed: 11/23/2022] Open
Abstract
Background In commercial pig farming, sick or injured sows are often treated by producers or hired staff. To date, limited quantitative data exists on treatment compliance and the possible effect on sow longevity post-treatment. The objective of the study was to quantify on-farm compliance of treatment selection, frequency, and dosage, as well as to investigate the association between body condition scores (BCS) and other sow-level factors on post-treatment cull risk. Results On-farm treatment records, including culling reason or reason of death up to 6 months post-treatment, production records and sow characteristics were obtained for 134 sows over an 8-week period. Treatment compliance was based on the accuracy of recorded treatments compared to the herd veterinarian’s established treatment guidelines. Univariable and multivariable logistic regression models including treatment reason, treatment compliance, BCS, parity, production stage and production metrics, were constructed to investigate associations between those variables and sow culling or death. This study found low compliance for on-farm sow treatment protocols, with only 22.4% (30/134) of the sows receiving correct and complete treatment during the duration of the study. No effect of individual treatment components (drug, dosage, or frequency) on sow culling was observed. A trend for an interaction between treatment compliance and BCS was found, and parity and number of piglets born alive were identified as predictors for sow maintenance in the herd. Conclusions On-farm sow treatment compliance was low, resulting in that approximately 80% of the enrolled sows were not treated according to existing guidelines. Non-compliance of treatment guidelines did not seem to affect the risk of culling in treated sows but may have prolonged any associated pain, recovery time and negatively impacted the sow welfare during that time period.
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Affiliation(s)
- Magnus R Campler
- Department of Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University, 1920 Coffey Rd, Columbus, OH, 43210, USA
| | - Jeremiah L Cox
- Department of Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University, 1920 Coffey Rd, Columbus, OH, 43210, USA
| | - Heather L Walker
- Department of Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University, 1920 Coffey Rd, Columbus, OH, 43210, USA
| | - Andréia G Arruda
- Department of Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University, 1920 Coffey Rd, Columbus, OH, 43210, USA.
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Windsor PA. Progress With Livestock Welfare in Extensive Production Systems: Lessons From Australia. Front Vet Sci 2021; 8:674482. [PMID: 34422941 PMCID: PMC8377471 DOI: 10.3389/fvets.2021.674482] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 07/15/2021] [Indexed: 11/13/2022] Open
Abstract
The extensive livestock production industries are vital to the national economy of Australia. Continuing improvements to extensively-raised livestock welfare is desirable, necessary and in some situations mandatory, if the social license for animal sourced food and fiber production is to continue sustainably. However, meeting increasingly high welfare standards is challenging. The changing climate in this millennium, has seen the occurrence of two of the most severe drought periods on record in Australia, resulting in complex welfare issues arising from unforeseen disease, trade and environmental catastrophes. The onset of the first drought coincided with an uncontrolled epidemic of ovine paratuberculosis. It ended just prior to a temporary ban on live export of tropical cattle to Indonesia that induced a major market failure and led to severe morbidity and mortality on some beef properties. The second drought period progressed in severity and culminated in the most extreme bushfires recorded, causing unprecedented levels of mortality, morbidity and suffering in farmed animals and wildlife. Temperature extremes have also caused periodic heat-associated or cold-induced hyopthermia losses, requiring increased vigilance and careful management to reduce both temperature-induced stress during transport and the high ovine peri-parturient losses traditionally observed in extensive sheep farming. Several issues remain controversial, including surgical mulesing of wool sheep to manage flystrike, and the continuing live export trade of sheep and cattle. However, in reviewing the increasingly complex welfare challenges for the extensive livestock population industries that are export trade dependent and remain vulnerable to welfare activism, it appears progress has been made. These include development of prescribed livestock welfare Standards and Guidelines and the introduction of the Exporter Supply Chain Assurance System (ESCAS) to address export concerns. Further, the sheep mulesing crisis led to improved producer welfare attitudes and practices, including pain management during aversive husbandry procedures that is now occurring globally. Finally, innovations in animal welfare surveillance and assessment, are additional encouraging signs that suggest improving change management of extensive farm animal welfare is occurring that provides lessons well-beyond Australian shores.
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Affiliation(s)
- Peter Andrew Windsor
- Sydney School of Veterinary Science, The University of Sydney, Camden, NSW, Australia
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