cetramide

s experimentally infected with ORFV was followed in this study. Briefly, 50 healthy, four-day-old male lambs were recruited from a Lacaune dairy sheep farm that had not experienced CE outbreaks in the previous three years. All lambs were tested by PCR and ELISA and confirmed negative for ORFV before being transferred to the facilities of the Veterinary Faculty of Zaragoza. Once there, they were randomly allocated into two independent and fully isolated pens, with 25 lambs in each. All lambs were experimentally infected with aliquots of 1 mL of inoculum containing 4 10 TCID50 (median tissue culture infectious dose) of ORFV. The inoculum was adminis- tered using an intradermal inoculation gun, distributed across the lips, gums and palate [31]. Briefly, an average of 17 inoculations were administered for each lamb (1.7 mL/animal), split between the right, left and central upper lips; right, left and central lower lips; and the upper and lower aspects of the interior of the mouth (gums and/or palate). Eight days after infection, once the first CE lesions appeared, lambs from pen 2 (treatment group) were treated with T-S (Tri-Solfen® , Medical Ethics, Melbourne, Australia), spraying 1.5 mL of the product with a dosing gun over the lips and inside the mouth, ensuring the complete coverage of all lesions. Treatment was repeated three days later (11 days post-inoculation) in the affected areas of the face (Table 1). Lambs from pen 1 (control group) did not receive any treatment. Table 1. Treatment and sampling schedule in lambs experimentally infected with Orf virus. Days Post-Treatment −8 −1 0 2 3 7 14 EI † Severity of the lesions Initial lesions T-S treatment § 1T-S 2T-S Blood sampling ‡ T0 T2 T7 T14 † EI = Experimental infection. § T-S = Tri-Solfen® ; 1T-S =

…The gross do- lation contains two local anaesthetics (lignocaine and bupivacaine), mestic product (GDP) per capita of Cameroon is estimated at USD adrenalin and cetramide in a gel matrix that creates a…

…The wound and lesion dressing formulation contains two local anaesthetics (lignocaine and bupivacaine), adrenalin and cetramide in a gel matrix that creates a barrier effect, numbing the pain of lesions, rapidly reducing…

review and editing. Eliz- in wounds treated with LABC, with rates of healing abeth Evans and Jane Hume contributed to con- retarding on day 11 before accelerating towards day ceptualisation, methodology, project administration 25 (Figure 7). An increase in wound area between days and writing—review and editing. All authors have 0 and 4 is known to occur during the early stages of read and agreed to the published version of the wound healing due to the contraction of perilesional manuscript. tissue. The effect of cetrimide on fibroblast viability and ACKNOWLEDGEMENTS wound healing has not been investigated. Medi- The authors would like to acknowledge the following Solfen, a similar product to Tri-Solfen, containing 5% individuals for their extensive contributions. Veron- (w/w) lidocaine hydrochloride, 0.5% (w/w) bupiva- ica Smith from Medical Ethics for providing product caine hydrochloride, 0.00451% (w/w) adrenaline acid information and statistical advice. Mitch Coyle and tartrate and 0.5% (w/w) cetrimide, is currently under- Rebecca Cameron from the University of Queensland going phase two clinical trials for use on acutely trau- School of Veterinary Science’s Equine Unit for their matic skin wounds in humans. The results from these assistance with animal management. Jo Gordon from clinical trials may provide additional information in the University of Queensland School of Veterinary the future. Science’s Pathology Department for tissue handling One horse developed white line disease on day 13 and preparation. Bianca Amiet from Invetus for study during the turn-out period. While the onset of white management. The study was funded by Invetus (grant line disease can be insidious, the disease was mild record 2018002127). and the horse responded well to supportive

wound formulation, local therapy Introduction Contagious ecthyma, also known as orf, contagious pustular dermatitis, sore mouth or scabby mouth, is a highly contagious eruptive skin condition of sheep, goats and other ruminants, although zoonotic transmission also occurs. Orf disease affects mainly young animals in the first year of their life, with severe outbreaks generally Correspondence: Delia Lacasta associated with intensive sheep husbandry or transport. Orf virus belongs to the Facultad de Veterinaria de Zaragoza, C/Miguel Servet 177, Zaragoza, 50013, genus Parapoxvirus, family Poxviridae, sub-family Chordopoxvirinae.1 It is Spain a pathogen with worldwide distribution, causing significant financial losses in Tel +34 609676727 Email dlacasta@gmail.com livestock production. Transmission of orf is from direct or indirect contact with Veterinary Medicine: Research and Reports 2021:12 149–158 149 Received: 12 February 2021 © 2021 Lacasta et al. This work is published and licensed by Dove Medical Press Limited. The full terms of this license are available at https://www.dovepress.com/terms. Accepted: 12 April 2021 php and incorporate the Creative Commons Attribution – Non Commercial (unported, v3.0) License (http://creativecommons.org/licenses/by-nc/3.0/). By accessing the work you hereby accept the Terms. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed. For Published: 9 June 2021 permission for commercial use of this work, please see paragraphs 4.2 and 5 of our Terms (https://www.dovepress.com/terms.php). Powered by TCPDF (www.tcpdf.org) Lacasta et al Dovepress the orf virus from pustules of infected animals containing- (cetrimide) in a gel formulation that

the chute to reduce movement. This emulated how the Pymble, NSW, Australia) used in these studies and the calves would be handled during the trial for treatment and current study consists of lidocaine (40.6 g/l), bupivacaine blood collection. Cows and calves were released into the (4.2 g/l), adrenalin (24.8 mg/l) and cetrimide (5.0 g/l). This 4 ha paddock between habituation periods. product is currently only registered for use in lambs under- going mulesing. Experimental use of the product in cattle is Experimental design and treatments conducted under a research permit issued by the Australian The experiment was conducted over 2 days, with treatment pesticides and veterinary medicines authority. groups evenly represented across each day. Maximum daily Assessment of cortisol concentration has been widely used temperatures for these days were 26.4 and 31.0°C. On each as a measure of acute distress in animals. Cortisol con- day, cows and calves were moved from the paddock into centration as a measure of pain-induced distress is used the holding yard adjacent to the cattle race. Calves were extensively because the response magnitude and duration, separated from their mothers into a separate holding pen, as measured by peak height and integrated cortisol response, and the cows were released back into the paddock. Calves usually accord with the predicted noxiousness of certain were moved through the race, restrained in the head bale procedures (Mellor et al., 2000). Measurement of cortisol has and released after treatment and blood sampling for every been used in cattle to quantify the effects of different painful time point. Calves generally moved through the race well. procedures such as dehorning (Sylvester et al., 1998), If required, calves were gently touched on the

trimide 0.5%). It was developed to provide single dose rapid onset lo- cal wound anaesthesia with a prolonged effect following application to surgical husbandry wounds in farm animals [43–48] and has regulatory approval for use to alleviate pain following castration and/or other husbandry procedures in lambs and calves in Australia and New Zealand. Recent studies suggest that it may be similarly effective to mitigate acute castration-related pain in piglets [44,48,49]. Lomax et al. [44], for example, reported intraoperative wound instillation of Tri-Solfen® was effective to reduce wound hyperal- gesic responses in piglets from within 1 min up to 4 h following castration. Amide local anaesthetics work by blocking pain signal conduction in nerve fibres. Applied topically to intact skin, they are of slow onset and limited efficacy due to inability to penetrate keratinised tissues to reach underlying nerve tissue. They may be rapidly effective (within Animals 2021, 11, 2763 3 of 20 1 min) when applied to open wounds, where skin layers are disrupted and traumatised nerve fibres are exposed. They may be similarly rapidly effective, (within 30 s) [50,51], when applied to non-keratinised mucous membranes, which they can readily penetrate. In the setting of castration, Tri-Solfen® is applied via wound instillation immediately follow- ing skin incision, thus coating the non-keratinised mucosal tissues of the spermatic cord, and the cut skin edge. Providing a 30 s dwell time may thus allow time for the anaesthetic actives to penetrate mucosal tissues of the spermatic cord, prior to applying traction on the testis and severing the spermatic cords. These latter steps are considered the most painful part of the procedure [14,15,52]. Consistent with this, reduced nociceptive