American journal of veterinary research最新文献

{"title":"Authors speak ….","authors":"Lisa A Fortier","doi":"10.2460/ajvr.85.11.editorial","DOIUrl":"https://doi.org/10.2460/ajvr.85.11.editorial","url":null,"abstract":"","PeriodicalId":7754,"journal":{"name":"American journal of veterinary research","volume":"85 11","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142563670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Medical-grade honey has superior antibacterial properties against common bacterial isolates in wound cultures of dogs and cats in comparison to non-medical-grade honey types.","authors":"Roxanna Neo, Pankaj Gaonkar, Laura Huber, Katelyn C Hlusko","doi":"10.2460/ajvr.24.07.0188","DOIUrl":"10.2460/ajvr.24.07.0188","url":null,"abstract":"<p><strong>Objective: </strong>To compare the antibacterial activities of different types of honey against common bacterial isolates cultured from wounds of dogs and cats.</p><p><strong>Methods: </strong>4 types of honey were used including a medical-grade manuka honey, a non-medical-grade manuka honey, a locally sourced non-medical-grade honey (non-MGH), and a commercially sourced non-MGH. Bacterial isolates were obtained from clinical wound cultures of dogs and cats including Staphylococcus pseudintermedius, Escherichia coli, Enterococcus faecalis, and Pseudomonas aeruginosa. The macro-broth dilution method was used to analyze the MIC and minimum bactericidal concentration. The percentage of growth inhibition was assessed for different types of honey at different concentrations using a generalized linear regression model.</p><p><strong>Results: </strong>Medical-grade honey exhibited the lowest minimum bactericidal concentration against S pseudintermedius, E faecalis, and P aeruginosa, alongside the lowest MIC at 90% with statistically significant higher bacterial growth inhibition in medium and low concentrations. Non-medical-grade manuka honey had a similar bactericidal activity against S pseudintermedius and P aeruginosa compared to locally and commercially sourced non-MGH.</p><p><strong>Conclusions: </strong>In this in vitro study, MGH exhibited superior antibacterial activity against all bacterial isolates compared to other types of honey.</p><p><strong>Clinical relevance: </strong>Medical-grade honey displayed the greatest antibacterial activity against common wound pathogens and could be considered over other types of honey for wound management in cats and dogs. Locally and commercially sourced non-MGH appears to have a comparative efficacy against certain bacteria compared to non-medical-grade manuka honey and is more cost effective. Further in vivo studies are needed to confirm these findings.</p>","PeriodicalId":7754,"journal":{"name":"American journal of veterinary research","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142456217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Interleukin 31 mediates pruritus in horses.","authors":"Nicky M Craig, Nathalie S Munguia, Andrew D Trujillo, Ann M Chan, Rachel Wilkes, Mackenzie Dorr, Rosanna Marsella","doi":"10.2460/ajvr.24.05.0144","DOIUrl":"10.2460/ajvr.24.05.0144","url":null,"abstract":"<p><strong>Objective: </strong>This study investigated the effects of recombinant equine IL-31 (eIL-31) in vivo and in vitro.</p><p><strong>Methods: </strong>Equine IL-31 mRNA sequences were verified by sequencing. Recombinant eIL-31 was produced using mammalian and bacterial expression systems. From November 2019 through February 2021, 12 normal horses, 6 to 10 years old with no history or clinical signs consistent with allergic skin disease, were injected ID with eIL-31 and saline in 2 challenge studies. Pruritus-associated behaviors were recorded for a minimum of 15 minutes preinjection and 4 hours postinjection. Adherent monocytes from 3 pruritic horses, exhibiting insect bite hypersensitivity and/or atopic dermatitis, were stimulated with bacterial eIL-31, and subsequent phosphorylation of signal transducer and activator of transcription 3 (STAT3) was measured by western blot and AlphaLISA.</p><p><strong>Results: </strong>The bacterial eIL-31 was produced with greater purity than the mammalian eIL-31 (> 95% vs 70%). Pruritus was elicited by both recombinant proteins. The mammalian eIL-31 induced mild pruritus (cumulative seconds spent itching postinjection ranged from 6 to 313). The bacterial eIL-31 induced marked pruritus in some horses (a cumulative maximum of 5,529 seconds spent itching in 1 horse) and a milder response in others (range of cumulative seconds spent itching, 17 to 2,313). Most pruritus occurred after 2 hours and subsided by 4 hours postinjection. Bacterial eIL-31 induced STAT3 phosphorylation in adherent monocytes from allergic horses.</p><p><strong>Conclusions: </strong>In this proof-of-concept study, IL-31 was found to mediate pruritus and was associated with STAT3 phosphorylation in horses as in other species.</p><p><strong>Clinical relevance: </strong>Interleukin 31 is a promising therapeutic target for equine allergic pruritus.</p>","PeriodicalId":7754,"journal":{"name":"American journal of veterinary research","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142456208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Novel, Humane Method of Sterilizing Dogs, Cats, and Pigs.","authors":"CheMyong Jay Ko, Uwe Rudolph, Peter Constable","doi":"10.2460/ajvr.24.09.0258","DOIUrl":"10.2460/ajvr.24.09.0258","url":null,"abstract":"","PeriodicalId":7754,"journal":{"name":"American journal of veterinary research","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142405913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Retrospective analysis of dual-energy x-ray absorptiometry data demonstrates body composition changes with age in dogs and cats.","authors":"Allison P McGrath, Leslie Hancock, Cheryl A Stiers, John Brejda, Elizabeth M Morris","doi":"10.2460/ajvr.24.05.0132","DOIUrl":"10.2460/ajvr.24.05.0132","url":null,"abstract":"<p><strong>Objective: </strong>Use 18 years of dual-energy x-ray absorptiometry (DEXA) scan data to characterize how body composition changes with age in dogs and cats.</p><p><strong>Methods: </strong>This was a retrospective observational study using data obtained from DEXA scans performed between 2006 and 2023. A total of 6,973 observations from 1,273 colony-housed dogs ≤ 1 to 16.1 years old and 6,593 observations from 1,096 colony-housed cats ≤ 1 to 16.9 years old were obtained. Animal ages were rounded to the nearest 1/10-year intervals. Means for each interval were calculated and quadratic, cubic, and quartic polynomial models were fit to assess trends over age.</p><p><strong>Results: </strong>Age had an effect on all DEXA measurements. In dogs, lean mass increased early in life before slowing to a peak at age 6.3 and then declined gradually. Fat mass also increased until slowing to a peak at age 9.3 and then decreased. In cats, lean mass increased before slowing to a peak at age 4.5, decreased gradually until age 12.5, and then sharply declined. Fat mass increased until slowing to a peak at age 7.5 and then decreased gradually.</p><p><strong>Conclusions: </strong>This retrospective study provides a baseline for how body composition changes with age. Results suggest that lean mass loss may begin earlier than previously reported in dogs and cats.</p><p><strong>Clinical relevance: </strong>Sarcopenia and obesity are common conditions in aging pets. Results can be used to improve body composition assessment of patients and investigate the efficacy of nutritional interventions.</p>","PeriodicalId":7754,"journal":{"name":"American journal of veterinary research","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142405914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sidestream dark field video microscopy demonstrates shelf-stable blood products preserve the endothelial glycocalyx in a canine hemorrhagic shock model.","authors":"Mark A Ryan, Rebekah Ford, Nicole Ewer, Kelly E Hall, Julien Guillaumin, Thomas H Edwards, Emilee C Venn, Lonnie E Grantham, Guillaume L Hoareau","doi":"10.2460/ajvr.24.05.0152","DOIUrl":"10.2460/ajvr.24.05.0152","url":null,"abstract":"<p><strong>Objective: </strong>To utilize sidestream dark field video microscopic technology to evaluate the endothelium in a canine hemorrhagic shock and resuscitation model.</p><p><strong>Methods: </strong>6 purpose-bred adult dogs were anesthetized, instrumented, and subjected to hemorrhagic shock from September 2021 through June 2022. Each dog was resuscitated with 5 resuscitation strategies in an experimental crossover design study: (1) lactated Ringer's solution (LRS) and hydroxyethyl starch (HES) solution; (2) canine chilled whole blood (CWB); (3) canine fresh frozen plasma (FFP) and packed RBCs (pRBC); (4) canine freeze-dried plasma (FDP) and hemoglobin-based oxygen carrier (HBOC); or (5) HBOC/FDP and canine lyophilized platelets. Sidestream dark field video microscopic evaluation was performed at 5 time points: commencement, after hemorrhage, after shock, after resuscitation (T135), and conclusion (T180).</p><p><strong>Results: </strong>There was a significant difference between the perfused boundary region (PBR) measurements when comparing the LRS/HES resuscitation arm to the CWB and FFP/pRBC resuscitation arms at T180. A significant difference in PBR was appreciated in the LRS/HES arm at T135 and T180 compared to its baseline. No other significant differences in PBR were appreciated when resuscitation arms were compared longitudinally or to each other.</p><p><strong>Conclusions: </strong>Shelf-stable blood products preserved the endothelial glycocalyx similarly to CWB and pRBC/FFP as evaluated by sidestream dark field video microscopy. Lactated Ringer and HES solutions did not adequately preserve the endothelial glycocalyx compared to CWB and pRBC/FFP.</p><p><strong>Clinical relevance: </strong>Shelf-stable blood products are a viable option to preserve the endothelial glycocalyx when used during hemorrhagic resuscitation in dogs.</p>","PeriodicalId":7754,"journal":{"name":"American journal of veterinary research","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142399157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Finite element analysis shows minimal stability difference between individualized mini-hemilaminectomy-corpectomy and partial lateral corpectomy in a dog model.","authors":"Yuki Kikuchi, Masakazu Shimada, Fumitaka Takahashi, Shinya Yamaguchi, Yasushi Hara","doi":"10.2460/ajvr.24.08.0244","DOIUrl":"10.2460/ajvr.24.08.0244","url":null,"abstract":"<p><strong>Objective: </strong>Use finite element analysis to evaluate the biomechanical effects of spinal decompression procedures in healthy Beagle dogs, comparing individualized mini-hemilaminectomy-corpectomy (iMHC), mini-hemilaminectomy, partial lateral corpectomy (PLC), and hemilaminectomy.</p><p><strong>Methods: </strong>A finite element model of the L1-L2 functional spinal unit was generated using CT data. For each decompression model, loads were applied in 0.2-Nm steps (maximum, 2.0 Nm) in 6 directions: flexion, extension, right and left lateral bending, and right and left axial rotation. The L1 spinous process tip displacement angle was quantified numerically.</p><p><strong>Results: </strong>Among the 4 techniques, mini-hemilaminectomy exhibited the smallest displacement angles across all directions. Hemilaminectomy exhibited the largest displacement angles in extension, flexion, right rotation, and left rotation across all techniques. Left and right lateral bending displacement angles were marginally larger for iMHC than for hemilaminectomy at 0.4 Nm; however, at 2.0 Nm, displacement angles were similar.</p><p><strong>Conclusions: </strong>Mini-hemilaminectomy minimizes functional spinal unit instability to the greatest extent. Hemilaminectomy is more unstable than iMHC and PLC in flexion, extension, and rotation. Mini-hemilaminectomy-corpectomy and PLC are more unstable than hemilaminectomy in lateral bending, with iMHC being slightly more unstable than PLC or nearly equal.</p><p><strong>Clinical relevance: </strong>Mini-hemilaminectomy minimizes instability to the greatest extent in cases of ventrolateral spinal compression. In cases of ventral spinal compression, iMHC may be preferable to PLC for providing equivalent stability without impeding spinal cord visualization, but both techniques can cause instability depending on loading direction, so careful attention to postoperative instability is necessary when excessive vertebral body resection is involved.</p>","PeriodicalId":7754,"journal":{"name":"American journal of veterinary research","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142399156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The prevalence of intervertebral disc degeneration in the cervical, thoracic, and lumbar spine in asymptomatic cats.","authors":"David Schmid, Valentina Lanzillotta, Richard Evans, Frank Steffen, Lucas A Smolders","doi":"10.2460/ajvr.24.04.0095","DOIUrl":"10.2460/ajvr.24.04.0095","url":null,"abstract":"<p><strong>Objective: </strong>To investigate the prevalence and severity of intervertebral disc (IVD) degeneration (IVDD) throughout the spine of young, middle-aged, and old asymptomatic cats; identify differences between the cervical, thoracic, and lumbar spine; and investigate the influence of sex and neuter status on the prevalence of feline IVDD.</p><p><strong>Methods: </strong>60 cadavers were collected from asymptomatic cats and subdivided into 3 age groups: young (≥ 1 to < 6 years), middle aged (≥ 6 to < 12 years), and old (≥ 12 years). T2 weighted sagittal MRI studies of the spine were obtained. Each IVD was graded according to the modified Pfirrmann grading for feline IVDD. Cumulative link mixed models were used to analyze the significance of spinal region, age, sex, and neuter status on the degenerative state of the IVDs.</p><p><strong>Results: </strong>A total of 1,544 IVDs were evaluated; 884 (57.3%), 425 (27.5%), 147 (9.5%), 82 (5.3%), and 6 (0.4%) were graded Pfirrmann 1, 2, 3, 4, and 5, respectively. Irrespective of spinal region, middle-aged cats (OR, 4.03; P < .01) and old cats (OR, 12.5; P < .01) had significantly higher odds for IVDD compared to young cats. For old cats, thoracic (OR, 4.44; P < .01) and cervical IVDs (OR, 2.76; P < .01) had significantly higher odds of degenerating compared to lumbar IVDs. No significant effect of sex (P = .81) and neuter status (P = .61) was found.</p><p><strong>Clinical relevance: </strong>The prevalence of feline IVDD significantly increases with progressive age, with the thoracic and cervical IVDs showing the highest odds for degeneration. However, extreme stages of IVDD were only occasionally observed.</p>","PeriodicalId":7754,"journal":{"name":"American journal of veterinary research","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142387350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pharmacokinetics of intramuscular L-carvone in sheep.","authors":"Robert J Brosnan, Heather K Knych, Alessia Cenani","doi":"10.2460/ajvr.24.08.0218","DOIUrl":"10.2460/ajvr.24.08.0218","url":null,"abstract":"<p><strong>Objective: </strong>To measure and model concentrations of the analgesic L-carvone, a natural component of spearmint, over time when administered IM to sheep and to characterize L-carvone's effects on CBCs and clinical biochemistry panels.</p><p><strong>Methods: </strong>L-carvone formulated as a 50% solution (v/v) in ethanol and propylene glycol was administered at 71.6 mg/kg IM, split between each semitendinosus muscle in 6 sheep. Venous blood was sampled over 24 hours, and plasma was separated by centrifugation. Additional blood was collected for CBC and serum biochemical analysis, and tissues were sampled after euthanasia. L-carvone concentrations in plasma and tissue homogenates were measured using HPLC-MS-MS. Plasma pharmacokinetic data were described using a nonlinear mixed effects model. Complete blood count and biochemistry data were compared to baseline values using repeated-measures ANOVA and Holm-Šidák tests (P < .05).</p><p><strong>Results: </strong>Maximum plasma concentrations ranged from 0.28 to 1.93 µg/mL and occurred within 9 to 15 minutes after injection. Pharmacokinetics were best described using 2 compartments. Elimination half-life was 33.7 minutes and 390.2 minutes in the central and peripheral compartments, respectively. Mild increases in neutrophil count and significant increases in creatinine kinase and aspartate aminotransferase were associated with injection site myonecrosis. No physical examination, behavioral, or other clinically significant laboratory changes were noted.</p><p><strong>Conclusions: </strong>Intramuscular L-carvone exhibits rapid time to peak concentration, relatively slow plasma elimination, and low tissue concentrations after 24 hours.</p><p><strong>Clinical relevance: </strong>L-carvone exhibits a favorable pharmacokinetic profile for an analgesic drug. A new L-carvone formulation or administration route is needed to reduce inflammation and necrosis at the injection site.</p>","PeriodicalId":7754,"journal":{"name":"American journal of veterinary research","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142387349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Baseline cystometric parameters in conscious and anesthetized sheep: experimental data and systematic review.","authors":"Jon Prager, Benjamin Metcalfe, Shamin Sadrafshari, John Taylor, Nick Donaldson, Nicolas Granger","doi":"10.2460/ajvr.24.06.0173","DOIUrl":"10.2460/ajvr.24.06.0173","url":null,"abstract":"<p><strong>Objective: </strong>To characterize cystometry in conscious and anesthetized sheep, including bladder response to sacral root electrical stimulation, thereby providing a baseline set of values.</p><p><strong>Methods: </strong>Single-fill cystometries were repeated in adult mule ewes both conscious (n = 5) and under general anesthesia (18) using a commercial system. Parameters including bladder capacity, detrusor (bladder) pressure, urethral opening pressure, bladder compliance, number of nonvoiding detrusor contractions, and bladder pressure change in response to electrical stimulation of the sacral roots under general anesthesia are reported. Pubmed, Embase, and Web of Science databases were searched for studies relating to ovine cystometry, and a systematic review was conducted.</p><p><strong>Results: </strong>In awake sheep, mean ± SD bladder capacity was 79.6 ± 32.2 mL, urethral opening pressure was 26.0 ± 10.7 cm H2O, and compliance was 3.5 ± 1.9 mL/cm H2O. Peak detrusor pressures during micturition reached 57.7 ± 28.3 cm H2O. In anesthetized animals, mean bladder capacity (endpoint, 50 cm H2O) was 333 ± 191 mL, and mean bladder compliance was 7.7 ± 4.9 mL/cm H2O. Values for these parameters from our systematic review are presented for comparison and reference. Electrical stimulation of the second and third sacral roots caused a greater increase in detrusor pressure than stimulation of the first and fourth sacral roots.</p><p><strong>Conclusions: </strong>We present a comprehensive set of data for normal cystometry parameters in sheep, including the first report of detrusor response to sacral root stimulation in anesthetized sheep.</p><p><strong>Clinical relevance: </strong>This report provides a valuable set of baseline values for a potential translational model of value to neurourologic research and may be a useful reference for clinicians.</p>","PeriodicalId":7754,"journal":{"name":"American journal of veterinary research","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142374890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}