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Timlin CL, Dickerson SM, Fowler JW, Mccracken FB, Skaggs PM, Ekmay R, Coon CN. The effects of torula yeast as a protein source on apparent total tract digestibility, inflammatory markers, and fecal microbiota dysbiosis index in Labrador Retrievers with chronically poor stool quality. J Anim Sci 2024; 102:skae013. [PMID: 38267019 PMCID: PMC10858388 DOI: 10.1093/jas/skae013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Accepted: 01/23/2024] [Indexed: 01/26/2024] Open
Abstract
This study examined the effects of varying protein sources on apparent total tract digestibility, inflammatory markers, and fecal microbiota in Labrador Retrievers with historically poor stool quality. Thirty dogs (15 male, 15 female; aged 0.93 to 11.7 yr) with stool quality scores ≤2.5 on a 5-point scale (1 representing liquid stool and 5 representing firm stool) were randomly assigned to 1 of 3 nutritionally complete diets with differing protein sources and similar macronutrient profiles: 1) chicken meal (n = 10); 2) 10% brewer's yeast (n = 10); or 3) 10% torula yeast (n = 10). Another 10 dogs (five male, five female) with normal stool quality (scores ranging from 3 to 4) received diet 1 and served as negative control (NC). All dogs were fed diet 1 for 7 days, then provided their assigned treatment diets from days 7 to 37. Daily stool scores and weekly body weights were recorded. On days 7, 21, and 36, blood serum was analyzed for c-reactive protein (CRP), and feces for calgranulin C (S100A12), α1-proteinase inhibitor (α1-PI), calprotectin, and microbiota dysbiosis index. Apparent total tract digestibility was assessed using the indicator method with 2 g titanium dioxide administered via oral capsules. Stool scores were greater in NC (P < 0.01) as designed but not affected by treatment × time interaction (P = 0.64). Body weight was greater (P = 0.01) and CRP lower (P < 0.01) in NC dogs. Dry matter and nitrogen-free extract digestibility did not differ among groups (P ≥ 0.14). Negative controls had greater fat digestibility compared to BY (94.64 ± 1.33% vs. 91.65 ± 1.25%; P = 0.02). The overall effect of treatment was significant for protein digestibility (P = 0.03), but there were no differences in individual post hoc comparisons (P ≥ 0.07). Treatment did not affect S100A12 or α1-PI (P ≥ 0.44). Calprotectin decreased at a greater rate over time in TY (P < 0.01). The dysbiosis index score for BY and TY fluctuated less over time (P = 0.01). Blautia (P = 0.03) and Clostridium hiranonis (P = 0.05) abundances were reduced in BY and TY. Dogs with chronically poor stool quality experienced reduced body weights and increased serum CRP, but TY numerically increased protein digestibility, altered the microbiome, and reduced fecal calprotectin. Torula yeast is a suitable alternative protein source in extruded canine diets, but further research is needed to understand the long-term potential for improving the plane of nutrition and modulating gut health.
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Choi J, Yoo MJ, Jang YJ, Na B, Seo SK, Moon J, Lee J, Seol JW. Development and clinical evaluation of a quantitative fluorescent immunoassay for detecting canine CRP. Int J Vet Sci Med 2023; 11:87-93. [PMID: 37649734 PMCID: PMC10464547 DOI: 10.1080/23144599.2023.2247250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 07/23/2023] [Accepted: 07/24/2023] [Indexed: 09/01/2023] Open
Abstract
Canine C-reactive protein (cCRP) is one of the major positive acute phase proteins in dogs and is commonly measured to detect and monitor systemic inflammation as well as the efficacy of treatment. Traditional methods for testing cCPR, including enzyme-linked immunosorbent assay (ELISA), have some drawbacks, such as a long time for diagnosis and the requirement of well-equipped laboratories. Therefore, there is a need for a rapid and precise diagnostic test for cCRP at point-of-care. This study assessed the accuracy, precision, and validated clinical effectiveness of a diagnostic test based on fluorescent lateral flow immunoassay to detect cCRP. For the standard cCRP concentration ranging from 0 to 200 μg/mL, the cCRP diagnostic test showed strong linearity with R2 of 0.9977 (p < 0.001), and both inter- and intra-assay CVs were <14%. The limit of detection and limit of quantitation were found to be 4.0 μg/mL and 5.0 μg/mL, respectively. The cCRP serum concentration was evaluated in 21 client-owned dogs and the results were compared to a previously validated ELISA. The Pearson Correlation Coefficient between the diagnostic test kit and ELISA was 0.942 [95% confidence interval: 0.859 to 0.976, p < 0.001], and the Bland-Altman plot indicated a bias of 26.82% [95% limits of agreement: -56.03 to 109.67], indicating a significant correlation and the agreement between the data from the cCRP diagnostic test and ELISA. In conclusion, the fluorescent immunoassay based diagnostic test is a suitable option for rapidly and precisely detecting cCRP in dogs, providing a convenient alternative to traditional methods for diagnosing acute inflammation.
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Affiliation(s)
- Jawun Choi
- College of Veterinary Medicine, Jeonbuk National University, Iksan, Republic of Korea
| | - Min-jae Yoo
- College of Veterinary Medicine, Jeonbuk National University, Iksan, Republic of Korea
| | - Ye-Ji Jang
- College of Veterinary Medicine, Jeonbuk National University, Iksan, Republic of Korea
| | - Byeonghak Na
- Product Business Office, GenBody Biotech Institute, Cheonan-si, Chungcheongnam-do, Republic of Korea
| | - Seul-ki Seo
- Product Business Office, GenBody Biotech Institute, Cheonan-si, Chungcheongnam-do, Republic of Korea
| | - Joungdae Moon
- Product Business Office, GenBody Biotech Institute, Cheonan-si, Chungcheongnam-do, Republic of Korea
| | - Jihoo Lee
- Raw Material Business Office, GenBody Biotech Institute, Cheonan-si, Chungcheongnam-do, Republic of Korea
| | - Jae-won Seol
- College of Veterinary Medicine, Jeonbuk National University, Iksan, Republic of Korea
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Kim S, Koo M, Tak Y, Jang S, Park J, Hwang KY, Park S. Development of carbon nanoparticles-based soluble solid-phase immune sensor for the quantitative diagnosis of inflammation. Biosens Bioelectron 2023; 222:114975. [PMID: 36473421 DOI: 10.1016/j.bios.2022.114975] [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: 01/28/2022] [Revised: 05/29/2022] [Accepted: 11/28/2022] [Indexed: 12/05/2022]
Abstract
Quantitative immunodiagnosis is one of the most commonly used methods for in vitro diagnostics. Various bioanalytical methods have been developed to quantitatively diagnose immune analytes; however, they require blood dilution pretreatment, reaction mixing, complicated experimental steps, and can cause diagnostic errors due to the hook effect. To address this issue, we introduced a simple immunoassay based on carbon nanoparticles (CNPs). The assay was designed to have high flexibility for use in various in vitro diagnostic devices by constructing a soluble solid-phase immune sensor with high solubility using antibody-conjugated CNPs and polymer materials. Excellent performance was achieved using a free-antibody system with dual calibration. To verify the performance of this method with high reliability, canine C-reactive protein was selected as the immune analyte. Interestingly, our method efficiently mitigated the hook effect with outstanding performance in a one-step reaction without blood dilution or reaction mixing. The detection range of the target can be effectively controlled using free antibodies. Therefore, our CNP-based immunodiagnosis method may advance the commercialization of point-of-care immune biosensors.
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Affiliation(s)
- Sulhee Kim
- Department of Biotechnology, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - Miyoung Koo
- Development Center, Samsung Bioepis Co., Ltd., 76, Songdogyoyuk-ro, Yeonsu-gu, Incheon, 21987, Republic of Korea
| | - Yukyung Tak
- Health and Medical Equipment Division, Samsung Electronics Co., Ltd., 129, Samsung-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do, 16677, Republic of Korea
| | - Seonhye Jang
- Department of Biotechnology, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - Jongmyeon Park
- Research Institute, Precision Biosensor, Inc., 306, Techno 2-ro, Yuseong-gu, Daejeon, 34036, Republic of Korea
| | - Kwang Yeon Hwang
- Department of Biotechnology, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea.
| | - Sungha Park
- Department of Bioengineering, Incheon JEI University, 15, Songdogyoyuk-ro 111beon-gil, Yeonsu-gu, Incheon, 21987, Republic of Korea.
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Kubota T, Tateishi N, Toita H, Kanaki N, Hata A, Fujitani N. Development of a canine blood C-reactive protein-measuring device using a flow-type immunosensor. ANAL SCI 2022; 38:1269-1276. [PMID: 35931913 DOI: 10.1007/s44211-022-00173-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Accepted: 06/07/2022] [Indexed: 11/01/2022]
Abstract
This study aimed to construct a measurement system with the same performance as a measurement system using an automated analyzer and immunoturbidimetric reagents (comparative method) using a flow-type immunosensor (FIS) based on the fluorescence-linked immunosorbent assay technology. In the FIS constructed in this study, all control samples were within the indicated values. The coefficient of variation of repeatability and intermediate precision were less than 2.4% and less than 4.4%, respectively. The lower limit of quantification in this measurement system was 3.9 mg/L, and linearity was confirmed for quantification values, ranging from 3.9 to 465 mg/L. Canine plasma samples (N = 39) were used to measure C-reactive protein (CRP) levels using the comparative method (x) and FIS (y). The regression equation between the measurements was y = 1.035 × - 0.002, with a correlation coefficient of 0.9809, indicating a significantly high correlation. Although the Brandt-Altman analysis suggested the possibility of a proportional systematic error between the two measurements, 38 of the 39 canine plasma samples measured fell within the acceptable range of error, indicating that the measurements are highly consistent. These results suggest that the analytical accuracy of the FIS constructed in this study and the quantitative value of canine CRP are equivalent to those of measurement systems using automated analyzers and immunoturbidimetric reagents.
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Affiliation(s)
- Tomoko Kubota
- Kyoto Bio Laboratory, Seeds Tec Co., Ltd., Kyodai Katsura Venture Plaza South Building 2113, Goryo-Ohara 1-39, Sakyo-ku, Kyoto, 6158245, Japan
| | - Norio Tateishi
- Kyoto Bio Laboratory, Seeds Tec Co., Ltd., Kyodai Katsura Venture Plaza South Building 2113, Goryo-Ohara 1-39, Sakyo-ku, Kyoto, 6158245, Japan
| | - Hideki Toita
- Seeds Tec Co., Ltd., Kumanodai 506-3, Matsuyama, Ehime, 7918016, Japan
| | - Nobutoshi Kanaki
- Doubutsu Kensa Inc., Goudo-cho 47-2, Hodogaya-ku, Yokohama, Kanagawa, 2400005, Japan
| | - Akihisa Hata
- Faculty of Veterinary Medicine, Okayama University of Science, Ikoino-oka 1-3, Imabari, Ehime, 7948555, Japan.,Biomedical Science Examination and Research Center, Okayama University of Science, Ikoino-oka 1-3, Imabari, Ehime, 7948555, Japan
| | - Noboru Fujitani
- Faculty of Veterinary Medicine, Okayama University of Science, Ikoino-oka 1-3, Imabari, Ehime, 7948555, Japan. .,Biomedical Science Examination and Research Center, Okayama University of Science, Ikoino-oka 1-3, Imabari, Ehime, 7948555, Japan.
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Connolly SL, Solter P, Don JH, Jeong KH, Constable PD. Evaluation of a point-of-care benchtop analyzer for quantitative measurement of C-reactive protein in canine serum and plasma. Vet Clin Pathol 2022; 51:511-523. [PMID: 35578379 DOI: 10.1111/vcp.13123] [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: 03/30/2021] [Revised: 01/04/2022] [Accepted: 01/21/2022] [Indexed: 11/29/2022]
Abstract
BACKGROUND Canine C-reactive protein (cCRP) is an acute-phase protein that increases dramatically with inflammation and has potential utility in monitoring disease progression and response to treatment. Rapid, automated point-of-care test (POCT) formats could enhance the clinical utility of cCRP measurement. OBJECTIVES We aimed to evaluate the VetChroma canine-specific POCT assay for the quantitative measurement of cCRP in canine serum or plasma. METHODS Serum and plasma from discarded canine diagnostic samples were used. Evaluation included intra- and inter-assay coefficients of variation and observed total error (TEobs ), linearity and spike recovery, the effect of interfering substances and sample matrices, and a method comparison study. RESULTS Intra-assay variation ranged from 2.5%-6.1%, and inter-assay variation ranged from 2.1%-5.4%. The TEobs ranged from 15.1%-19.7%. The assay was linear over the manufacturer's analytical range with no evidence of constant or proportional bias. Recovery of purified cCRP from canine serum ranged from 116.2% to 138.4%. Hemolysis, icterus, and turbidity did not interfere with the assay. The comparison of paired plasma and serum samples revealed constant and proportional bias. Comparison of the VetChroma cCRP assay to a commercial cCRP ELISA revealed significantly different results. CONCLUSIONS The VetChroma cCRP assay has acceptable test performance to measure serum cCRP concentration. The POCT protocol and test kit are valid for clinical use, although results obtained using other cCRP assays or plasma may not be directly compared.
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Affiliation(s)
- Sara L Connolly
- Department of Pathobiology, College of Veterinary Medicine, University of Illinois, Urbana, Illinois, USA
| | - Phil Solter
- Department of Pathobiology, College of Veterinary Medicine, University of Illinois, Urbana, Illinois, USA
| | - Joo Hoo Don
- Anivet Diagnostics Inc, Chuncheon-si, South Korea
| | | | - Peter D Constable
- Department of Pathobiology, College of Veterinary Medicine, University of Illinois, Urbana, Illinois, USA
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Covin MA, Steiner JM. Measurement and clinical applications of C-reactive protein in gastrointestinal diseases of dogs. Vet Clin Pathol 2022; 50 Suppl 1:29-36. [PMID: 35014071 PMCID: PMC9303876 DOI: 10.1111/vcp.13100] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 10/12/2021] [Accepted: 11/14/2021] [Indexed: 12/11/2022]
Abstract
C-reactive protein (CRP) is a positive acute-phase protein, serum concentrations of which increase nonspecifically in response to inflammatory processes of the dog. As such, it can aid in the identification of inflammatory disease and, maybe more importantly, the objective monitoring of disease progression. In dogs, CRP is frequently used to evaluate dogs with gastrointestinal diseases, such as chronic inflammatory enteropathies (also termed idiopathic inflammatory bowel disease), acute pancreatitis, canine parvovirus infection, hepatic disease, acute abdomen, and protein-losing enteropathy. The diversity of the assays available to measure CRP in dogs is nearly as numerous as the diseases in which serum concentrations of this protein are increased. Assay methodologies include laser nephelometric immunoassays, enzyme-linked immunosorbent assays, immunoturbidimetric assays, and time-resolved immunofluorometric assays. While many of these assays are acceptable for clinical use in the dog, the same assay and analyzer should be used to measure a patient's CRP concentration longitudinally. By looking at the uses of CRP in human gastroenterology, including reducing the duration of antibiotic therapy, the veterinary profession can gain insight into novel ways in which serum CRP concentration measurements might be applied in veterinary medicine in the future.
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Affiliation(s)
- Marshal A Covin
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, Texas A&M University, College Station, TX, USA
| | - Joerg M Steiner
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, Texas A&M University, College Station, TX, USA
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Kiemle J, Hindenberg S, Bauer N, Roecken M. Comparison of a point-of-care serum amyloid A analyzer frequently used in equine practice with 2 turbidimetric immunoassays used in human and veterinary medicine. J Vet Diagn Invest 2021; 34:42-53. [PMID: 34763564 PMCID: PMC8688985 DOI: 10.1177/10406387211056029] [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] [Indexed: 11/21/2022] Open
Abstract
Rapid, accurate detection of serum amyloid A (SAA) is needed in equine practice. We validated a patient-side point-of-care (POC) assay (Stablelab; Zoetis) compared to the turbidimetric immunoassays LZ-SAA (TIA-Hum) and VET-SAA (TIA-Vet; both Eiken Chemical). Analytical performance was assessed at 3 different concentration ranges and with interferences. Inter-method comparison using 49 equine serum samples revealed a significant difference between median SAA results (p < 0.0001), with the strongest bias between the POC and TIA-Vet (median 1,093 vs. 578 mg/L). The median SAA value obtained with the TIA-Hum method was 752 mg/L. Correlation between POC/TIA-Hum and between POC/TIA-Vet was fair (rs = 0.77 and 0.69) and excellent between both TIAs (rs = 0.93). Bias between POC/TIA-Hum, POC/TIA-Vet, and TIA-Hum/TIA-Vet was −56.7%, –80.9%, and −28.2%, respectively. POC intra- and inter-assay CVs (16.1–30% and 19.8–35.5%) were higher than TIA CVs (generally <12%). Bilirubin and hemoglobin had a negative bias on POC and TIA-Vet results (−16.6 to −45.6%); addition of intralipid yielded a positive bias (35.9–77.4%). The POC had good linearity of SAA concentrations up to 10,312 mg/L (R2 = 0.92). A hook effect was present at SAA >3,000 mg/L for the POC assay. Equine serum SAA was stable over a median period of 2.5 y when stored at −80°C. Overall, there was excellent-to-moderate correlation between tests, but imprecision and hook effect of the POC, as well as bias between the methods, must be considered.
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Affiliation(s)
- Julia Kiemle
- Clinic for Horses, Department of Equine Surgery and Orthopaedics, Faculty of Veterinary Medicine, Justus-Liebig-University Giessen, Giessen, Germany
| | - Sarah Hindenberg
- Department of Veterinary Clinical Sciences, Clinical Pathology and Clinical Pathophysiology, Faculty of Veterinary Medicine, Justus-Liebig-University Giessen, Giessen, Germany
| | - Natali Bauer
- Department of Veterinary Clinical Sciences, Clinical Pathology and Clinical Pathophysiology, Faculty of Veterinary Medicine, Justus-Liebig-University Giessen, Giessen, Germany
| | - Michael Roecken
- Clinic for Horses, Department of Equine Surgery and Orthopaedics, Faculty of Veterinary Medicine, Justus-Liebig-University Giessen, Giessen, Germany
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Covin MA, Gomez RR, Suchodolski JS, Steiner JM, Lidbury JA. Analytical validation of a point-of-care test and an automated immunoturbidimetric assay for the measurement of canine C-reactive protein in serum. CANADIAN JOURNAL OF VETERINARY RESEARCH = REVUE CANADIENNE DE RECHERCHE VETERINAIRE 2021; 85:285-292. [PMID: 34602733 PMCID: PMC8451710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Accepted: 03/19/2021] [Indexed: 06/13/2023]
Abstract
C-reactive protein (CRP) is an acute phase protein, which is used to evaluate and monitor the response of the innate immune system to a variety of inflammatory processes in the dog. The purpose of this study was to analytically validate a point-of-care assay (IDEXX Catalyst CRP Test) and an immunoturbidimetric assay (Gentian Canine CRP Immunoassay) for the measurement of serum CRP concentrations in dogs. These 2 assays (Catalyst, Gentian) were compared to a previously validated enzyme-linked immunosorbent assay (Tridelta Development EIA Canine CRP Assay). Linearity, precision, reproducibility, and accuracy were assessed using leftover serum samples. Agreement between assays was assessed using leftover serum samples and serum from clinically healthy dogs. Observed to expected ratios (O/E) for dilutional parallelism were 83.9 to 163.1% and 108.3 to 160.6% for the Catalyst and the Gentian assays, respectively. Coefficients of variation for intra-assay variability ranged from 6.4 to 9.5% for the Catalyst assay and 1.5 to 2.6% for the Gentian assay. Coefficients of variation for inter-assay variability ranged from 3.8 to 18.2% for the Catalyst assay and 4.5 to 5.8% for the Gentian assay. The mean O/E for recovery were 97.9% and 98.5% for the Catalyst and Gentian assays, respectively. Correlations between assays were as follows: Catalyst and Tridelta (R 2 = 0.76), Gentian and Tridelta (R 2 = 0.79), and Catalyst and Gentian (R 2 = 0.98). The Catalyst and Gentian assays are both acceptable for measuring CRP in dog serum, but their results are not directly comparable with the Tridelta assay.
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Affiliation(s)
- Marshal A Covin
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, Texas A&M University, 4474 TAMU, College Station, Texas 77843-4474, USA
| | - Robynne R Gomez
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, Texas A&M University, 4474 TAMU, College Station, Texas 77843-4474, USA
| | - Jan S Suchodolski
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, Texas A&M University, 4474 TAMU, College Station, Texas 77843-4474, USA
| | - Jörg M Steiner
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, Texas A&M University, 4474 TAMU, College Station, Texas 77843-4474, USA
| | - Jonathan A Lidbury
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, Texas A&M University, 4474 TAMU, College Station, Texas 77843-4474, USA
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Dupont N, Jessen LR, Moberg F, Zyskind N, Lorentzen C, Bjørnvad CR. A retrospective study of 237 dogs hospitalized with suspected acute hemorrhagic diarrhea syndrome: Disease severity, treatment, and outcome. J Vet Intern Med 2021; 35:867-877. [PMID: 33638574 PMCID: PMC7995406 DOI: 10.1111/jvim.16084] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 01/26/2021] [Accepted: 02/02/2021] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Few studies have investigated management and outcome in dogs with acute hemorrhagic diarrhea syndrome (AHDS), and there is a paucity of data on dogs with concurrent signs of sepsis. OBJECTIVES To report outcome in dogs with suspected AHDS according to disease severity and antimicrobial treatment, and to evaluate effect of fluid resuscitation on clinical criteria. ANIMALS Two hundred thirty-seven dogs hospitalized with suspected AHDS. METHODS Retrospective study based on medical records. Disease severity was evaluated using AHDS index, systemic inflammatory response syndrome (SIRS) criteria, and serum C-reactive protein (CRP) according to 3 treatment groups: No, 1, or 2 antimicrobials. RESULTS Sixty-two percent received no antimicrobials, 31% received 1 antimicrobial, predominantly aminopenicillins, and 7% received 2 antimicrobials. At admission, median AHDS index was 13 (interquartile range, 11-15), which decreased significantly after the first day's hospitalization (P < .001) for all groups. Compared with no antimicrobials (7%), more dogs had ≥2 SIRS criteria in the antimicrobial groups (15% and 36%, respectively). C-reactive protein (CRP) correlated positively with AHDS index at hospitalization (P < .001). Across treatment groups, rehydration markedly reduced number of clinical SIRS criteria. Survival to discharge was 96%, lower for dogs receiving 2 antimicrobials (77%, P < .05). CONCLUSIONS AND CLINICAL IMPORTANCE The majority of dogs hospitalized with suspected AHDS improve rapidly with symptomatic treatment only, despite signs of systemic disease on initial presentation. The often-used SIRS criteria might be a poor proxy for identifying dogs with AHDS in need of antimicrobial treatment, in particular when hypovolemic. The role of CRP in clinical decision-making or prognostication warrants further investigation.
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Affiliation(s)
- Nana Dupont
- Department of Veterinary Clinical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Lisbeth Rem Jessen
- Department of Veterinary Clinical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Frida Moberg
- Department of Veterinary Clinical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Nathali Zyskind
- Department of Veterinary Clinical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Camilla Lorentzen
- Department of Veterinary Clinical Sciences, University of Copenhagen, Copenhagen, Denmark
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Weiler K, Kleber K, Zielinsky S, Moritz A, Bauer N. Analytical performance and method comparison of a quantitative point-of-care immunoassay for measurement of bile acids in cats and dogs. J Vet Diagn Invest 2021; 33:35-46. [PMID: 33112211 PMCID: PMC7756073 DOI: 10.1177/1040638720968784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Point-of-care analyzers (POCAs) for quantitative assessment of bile acids (BAs) are scarce in veterinary medicine. We evaluated the Fuji Dri-Chem Immuno AU10V analyzer and v-BA test kit (Fujifilm) for detection of feline and canine total serum BA concentration. Results were compared with a 5th-generation assay as reference method and a 3rd-generation assay, both run on a bench-top analyzer. Analytical performance was assessed at 3 different concentration ranges, and with interferences. For method comparison, samples of 60 healthy and diseased cats and 64 dogs were included. Linearity was demonstrated for a BA concentration up to 130 µmol/L in cats (r = 0.99) and 110 µmol/L in dogs (r = 0.99). The analyzer showed high precision near the lower limit of quantification of 2 µmol/L reported by the manufacturer. Intra- and inter-assay coefficients of variation were < 5% for both species and all concentrations. Interferences were observed for bilirubin (800 mg/L) and lipid (4 g/L). There was excellent correlation with the reference method for feline (rs = 0.98) and canine samples (rs = 0.97), with proportional biases of 6.7% and -1.3%, respectively. However, a large bias (44.1%) was noted when the POCA was compared to the 3rd-generation assay. Total observed error was less than total allowable error at the 3 concentrations. The POCA reliably detected feline and canine BA in clinically relevant concentrations.
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Affiliation(s)
- Kristina Weiler
- Department of Veterinary Clinical Sciences, Clinical Pathology and Clinical Pathophysiology, Justus-Liebig-University, Giessen, Germany
| | - Katharina Kleber
- Department of Veterinary Clinical Sciences, Clinical Pathology and Clinical Pathophysiology, Justus-Liebig-University, Giessen, Germany
| | - Sabine Zielinsky
- Department of Veterinary Clinical Sciences, Clinical Pathology and Clinical Pathophysiology, Justus-Liebig-University, Giessen, Germany
| | - Andreas Moritz
- Department of Veterinary Clinical Sciences, Clinical Pathology and Clinical Pathophysiology, Justus-Liebig-University, Giessen, Germany
| | - Natali Bauer
- Department of Veterinary Clinical Sciences, Clinical Pathology and Clinical Pathophysiology, Justus-Liebig-University, Giessen, Germany
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11
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Waritani T, Cutler D, Chang J. Development of canine C-reactive protein assays. Acta Vet Scand 2020; 62:50. [PMID: 32894191 PMCID: PMC7487759 DOI: 10.1186/s13028-020-00549-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Accepted: 08/31/2020] [Indexed: 11/30/2022] Open
Abstract
C-reactive protein (CRP), which is released during tissue damage and inflammation, is a useful nonspecific inflammatory marker in both human and veterinary clinical practice. Veterinarians have often used human CRP assays to analyze samples from canine patients, but cross-reactivities between the species affect assay sensitivity and reliability, leading to inaccurate inflammation assessment. To improve the efficiency of inflammation assessment, we developed a canine CRP detection enzyme-linked immunosorbent assay (ELISA) for quantitative analysis and an immunochromatography assay (ICA) for semiquantitative point-of-care (POC) analysis. The ELISA demonstrated an assay detection limit of 0.5 ng/mL, quantitative linear assay range of 1.6–100 ng/mL, and intra- and inter-assay coefficient of variations of 0.7 to 10.0% and 6.0 to 9.0%, respectively; the recovery rates of samples spiked with purified canine CRP were 105 to 109%, and the parallelism assessments were 82.7 to 104.4%. The correlation between the CRP level results obtained with the ELISA and those of a currently available quantitative POC assay was 0.907 with the regression formula of y = 0.55x + 0.05. In addition, the ICA requires only 5 μL samples and a 10-min assay time, and clearly distinguished positive, weak positive, and negative samples (P < 0.001) at an approximately 5–10 µg/mL cut-off value. The developed canine CRP ELISA and ICA showed reliable assay results and a high correlation with a commercially available POC assay in clinical use. The ICA can be a useful canine CRP screening test for diagnostic purposes in veterinary clinics.
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Hindenberg S, Bauer N, Moritz A. Extremely high canine C-reactive protein concentrations > 100 mg/l - prevalence, etiology and prognostic significance. BMC Vet Res 2020; 16:147. [PMID: 32434519 PMCID: PMC7237877 DOI: 10.1186/s12917-020-02367-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Accepted: 05/10/2020] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND In human medicine, extremely high CRP (C-reactive protein) concentrations > 100 mg/l are indicators of bacterial infection and the need of antibiotic treatment. Similar decision limits for septic pneumonia are recommended for dogs but have not yet been evaluated for other organ systems. The aim of the retrospective study was to investigate the prevalence and evaluate dogs with CRP concentrations > 100 mg/l regarding the underlying etiology, the affected organ system and the prognostic significance. RESULTS Prevalence of CRP > 100 mg/l was investigated in dogs presented between 2014 and 2015 and was 12%. For evaluation of etiology and organ systems, dogs with CRP > 100 mg/l presented between 2014 and 2016 were enrolled. Dogs were classified into 4 main disease categories, i.e. inflammatory, neoplastic, tissue damage or "diverse". Diseases were assigned to the affected organ system. If an organ classification was not possible, dogs were classified as "multiple". 147 dogs with CRP 101-368 mg/l were included and classified into disease categories: 86/147 (59%) with inflammatory etiology (among these, 23/86 non-infectious, 44/86 infectious (33/44 bacterial), 19/86 inflammation non-classifiable), 31/147 (21%) tissue damage, 17/147 (12%) neoplastic (all malignant) and 13/147 (9%) diverse diseases. The affected organ systems included 57/147 (39%) multiple, 30/147 (20%) trauma, 21/147 (14%) gastrointestinal tract, 10/147 (7%) musculoskeletal system, 8/147 (5%) respiratory tract, 7/147 (5%) urinary/reproductive tract, 6/147 (4%) skin/subcutis/ear, 6/147 (4%) central/peripheral nervous system and 2/147 (1%) heart. The disease group (p = 0.081) or organ system (p = 0.17) did not have an impact on CRP. Based on CRP, a detection of bacterial infection was not possible. The prognostic significance was investigated by determining the 3-months survival and hospitalization rate in a subgroup with known outcome. The 3-months survival rate was 46/73 (63%) while the majority 66/73 (90%) of patients was hospitalized. CONCLUSIONS CRP concentrations > 100 mg/l are occasionally seen in a clinic population. They indicate a severe systemic disease of various etiologies with guarded prognosis. Extremely high CRP concentrations do not allow a conclusion of the underlying etiology or an identification of bacterial inflammation.
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Affiliation(s)
- Sarah Hindenberg
- Department of Veterinary Clinical Sciences, Clinical Pathology and Clinical Pathophysiology, Justus-Liebig-University Giessen, Frankfurter Str. 114, 35392, Giessen, Germany.
| | - Natali Bauer
- Department of Veterinary Clinical Sciences, Clinical Pathology and Clinical Pathophysiology, Justus-Liebig-University Giessen, Frankfurter Str. 114, 35392, Giessen, Germany
| | - Andreas Moritz
- Department of Veterinary Clinical Sciences, Clinical Pathology and Clinical Pathophysiology, Justus-Liebig-University Giessen, Frankfurter Str. 114, 35392, Giessen, Germany
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