scholarly journals 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

2021 ◽  
pp. 104063872110560
Author(s):  
Julia Kiemle ◽  
Sarah Hindenberg ◽  
Natali Bauer ◽  
Michael Roecken
Keyword(s):  
Serum Amyloid A ◽  
Point Of Care ◽  
Method Comparison ◽  
Serum Amyloid ◽  
Serum Samples ◽  
Amyloid A ◽  
Hook Effect ◽  
Significant Difference ◽  
Median Period ◽  
Patient Side

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.

scholarly journals Composite Bacterial Infection Index and Serum Amyloid A Protein in Pulmonary Tuberculosis Patients and their Household Contacts in Makassar

2021 ◽  
Vol 9 (B) ◽  
pp. 557-562
Author(s):  
Irda Handayani ◽  
Muhammad Nasrum Massi ◽  
Yanti Leman ◽  
Rosdiana Natzir ◽  
Ilhamjaya Patellongi ◽  
...  
Keyword(s):  
Bacterial Infection ◽  
Serum Amyloid A ◽  
Household Contact ◽  
Serum Amyloid ◽  
Serum Samples ◽  
Amyloid A ◽  
Household Contacts ◽  
Significant Difference ◽  
Infection Index ◽  
Hs Crp

BACKGROUND: Early diagnosis of tuberculosis (TB) cases in limited resource remains challenging. It is urgent to identify the new diagnostic tools which can control the spread of disease with accurate and rapid test. AIM: This study aimed to investigate the levels of infection markers: Composite bacterial infection index (CBII) and serum amyloid A (SAA) protein in pulmonary TB (PTB), and their healthy household contacts, as the alternative diagnostic markers for TB. METHODS: CBII and SAA were measured from 44 new PTB patients, and 31 household contact serum samples. The value of CBII was calculated from neutrophils, lymphocytes, monocytes, erythrocyte sedimentation rate, and high-sensitivity C-reactive protein (hs-CRP) level. hs-CRP and SAA levels were quantified from their serum samples using ELISA. QuantiFERON-TB Gold Plus (interferon gamma release assay [IGRA]) was used to screen latent TB infection among household contacts. RESULTS: Among 31 household contacts, there were 24 positive IGRA results and the rest (n = 7) had negative results. PTB patients exhibited significantly higher level CBII in the serum specimens, than those in household contact (p < 0.0001). There was no significant difference in the SAA level between TB cases and household contacts (p = 0.679). CONCLUSIONS: CBII can be used as one of the biomarkers for the identification of PTB from the serum specimens.

scholarly journals Analytical Validation of Two Point-of-Care Assays for Serum Amyloid A Measurements in Cats

Animals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2518
Author(s):  
Damián Escribano ◽  
Alba Ortín Bustillo ◽  
Luis Pardo Marín ◽  
Andrea Navarro Rabasco ◽  
Pablo Ruiz Herrera ◽  
...  
Keyword(s):  
Gold Standard ◽  
Serum Amyloid A ◽  
Performance Test ◽  
Limit Of Detection ◽  
Inflammatory Diseases ◽  
Point Of Care ◽  
Serum Amyloid ◽  
Analytical Validation ◽  
Serum Samples ◽  
Amyloid A

Serum Amyloid A (SAA) is one of the most sensitive tests to detect inflammation in cats. In this study, two point-of-care assays for SAA measurements in cats (FUJI DRI-CHEM IMMUNO AU CARTRIDGE vf-SAA (method A), and CUBE-VET analyser (Method B), were analytically evaluated. Regarding the imprecision precision only the method A showed intra-assay and inter-assay CV < 10% at all concentrations. Both assays showed linearity with r close to 1 and the recovery were in the range of 81–112% for assay A and 85–125% for assay B and the limit of detection were 3.75 and 0.5 mg/dL for method A and B, respectively. A previously validated method for SAA quantification SAATIA; LZ-SAA (method C) was used as gold-standard to evaluate the accuracy of the assays. Significant correlations (p < 0.0001) were found between assays A and C (r = 0.94) and B and C (r = 0.91). In addition, an overlap performance test was made using serum samples from cats with non-inflammatory and cats with inflammatory. Both assays showed higher median SAA concentrations in cats with inflammatory diseases than in cats without inflammatory diseases (p < 0.0001). In conclusion, this manuscript provides data about the possible application of two point-of-care assays for the measurement of SAA concentration in cats.

Acute Phase Proteins (Haptoglobin and Serum Amyloid A) and Pro-Inflammatory Cytokines (IL-12 and IL-10) in Cows Vaccinated with Prototype Killed S. aureus Mastitis Vaccine and Challenged with S. aureus Mastitis Infection.

2020 ◽  
Author(s):  
Idris Umar Hambali ◽  
Faez Firdaus Jesse Bin Abdallah ◽  
Khaleequl rahaman Bhuttu ◽  
Azmi M Lila ◽  
zunita Zakaria ◽  
...  
Keyword(s):  
Inflammatory Cytokines ◽  
Serum Amyloid A ◽  
Acute Phase Proteins ◽  
Serum Amyloid ◽  
Bacterial Challenge ◽  
Amyloid A ◽  
Significant Difference ◽  
Group B ◽  
Pro Inflammatory Cytokines ◽  
Friesian Cows

Abstract Background The economic downturn experienced by farmers and the fear of milk borne infection are of a greater public health concern. Haptoglobin, Serum Amyloid A, IL-12 and IL-10 in lactating Friesian cows vaccinated with prototype killed S. aureus mastitis vaccine and challenged with S. aureus were evaluated. Bacterin concentration at 10 8 cfu /ml of the local isolate of S. aureus was adjuvanted with KAl(SO₄)₂. Six lactating Friesian cows were grouped into A= Negative control, B = Positive control and C = vaccine group. Group C was vaccinated intramuscularly with 2ml of the monovalent vaccine, groups A and B with physiologic normal saline. Groups B and C were later challenged with the live bacterium via intramammary route . Result There was a significant increase in IL-10 concentration in vaccinated group post primary vaccination (PPV), booster phase (PB) and during the bacterial challenge phase. There was also a significantly increased IL-12 concentration in the vaccinated group at 24 hours, weeks 1 and 2 PPV. Haptoglobin at 12 and 24 hours PPV had a significant difference in group C. During the PB at 8 and 12 hours there was a significant difference in group C. During the bacterial challenged phase at 0, 3, 24 hours and day 7 PC there was a significant difference in group B. At 8 hours PC there was a significant difference in group C. For Serum Amyloid A, during PPV at 0, 3, 8, 12, 24 hours and weeks 1 and 2, the concentrations was significantly different in groups C. During PB at 0, 3, 8 and 12 hours PB there was a significant difference in groups C. During the bacterial challenge phase at 3, 8, 12, 24 hours, days 7 and 14 PC there was a significant difference in group B. At 0 hour PC there was a significant increase observed in group C. Conclusion The developed prototype killed S. aureus mastitis vaccine using local isolates was able to stimulate acute phase proteins and pro-inflammatory cytokines. The pattern of responses PC indicated protection, thereby suggesting that vaccination can protect against mastitis infection in dairy cows.

scholarly journals Physiotherapy protocol during initial postoperative period of arthroscopy in horses

2018 ◽  
Vol 38 (12) ◽  
pp. 2201-2206
Author(s):  
Fernanda C. Stievani ◽  
Thais S.L. Machado ◽  
Kaio B. Bezerra ◽  
Marilene M. Silva ◽  
Raquel Y.A. Baccarin ◽  
...  
Keyword(s):  
Synovial Fluid ◽  
Physical Examination ◽  
Postoperative Period ◽  
Serum Amyloid A ◽  
Serum Amyloid ◽  
Control Group ◽  
Physical Analysis ◽  
Amyloid A ◽  
Significant Difference ◽  
Significant Change

ABSTRACT: This study evaluated the effects of a physiotherapy protocol applied in joints with osteochondritis dissecans submitted to arthroscopy. Twelve horses totaling twenty joints were used and divided into two uniform groups, according to articular lesion grade. Treated Group (TG) received the physiotherapy protocol (cryotherapy, passive rage motion and controlled exercise) that initiate just after anesthetic recovery and extended for five days. Control Group (CG) remained resting in stall during the same period. Physical examination and synovial fluid analysis were used to evaluate the treatment. The synovial fluid examination consisted of physical analysis (color, aspect, and viscosity), mucin clot evaluation, Serum Amyloid A, Prostaglandin E2 and urea concentration. Synovial samples were collected by arthrocentesis at the beginning of the surgical procedure (D1), 48 hours (D3) and 96 hours (D5) after surgery. Before arthroscopy and daily during the postoperative period joints were evaluated by physical exam: superficial temperature (°C), range of motion (degrees) and circumference (centimeters). The joint physical examination showed no significant difference between groups and neither along the days for the same group. The parameters of synovial fluid showed difference over the moments in each group but didn’t have difference between groups. Color and aspect had the same patterns across moments, in CG fluid had significant change when compared D1 with D3 (color and aspect: p<0.001) and D5 (color: p<0.001; aspect: p<0.05) becoming mostly bloody and cloudy in D3 and D5. However in TG the difference was significant just between D1 and D3 (color and aspect: p<0.05), showing an improvement of synovial fluid in D5 (color and aspect: p>0.05). Viscosity and mucin clot evaluation showed significant change in CG between D1 and D3 (viscosity: p<0.01; mucin clot: p<0.05) and between D1 and D5 (viscosity: p<0.01;mucin clot: p<0.01). In TG no significant difference of viscosity and mucin clot was observed over the moments, showing an early improvement of synovial fluid quality. The Serum Amyloid A concentration showed an extremely significant increase in CG (p<0.001) when compared D1 (1217.13±664.47μg/mL) and D3 (42423.80±52309.31μg/mL). The comparison between D1 and D5 in CG, and across moments in TG, had no statistical difference. The PGE2 eicosanoid remained statistically unchanged all over the time. Urea showed significant increase in D3 when compared to D1 (p<0.001) in CG, and had no variation in TG. The physiotherapy protocol minimized the inflammatory mediators and provided minor alterations in synovial fluid after arthroscopy.

scholarly journals Can blood serum amyloid A concentrations in horses differentiate synovial sepsis from extrasynovial inflammation and determine response to treatment?

2020 ◽  
Vol 187 (6) ◽  
pp. 235-235
Author(s):  
Matthew Sinovich ◽  
Nicolas F Villarino ◽  
Ellen Singer ◽  
Claire S Robinson ◽  
Luis M Rubio-Martínez
Keyword(s):  
Serum Amyloid A ◽  
Prognostic Indicator ◽  
Diagnostic Value ◽  
Serum Amyloid ◽  
Response To Treatment ◽  
Specific Marker ◽  
Time Curve ◽  
Serial Blood ◽  
Amyloid A ◽  
Significant Difference

BackgroundSerum amyloid A (SAA) concentrations in blood and synovial fluid of horses with synovial sepsis have diagnostic value. Studies suggest serial blood SAA measurements could act as a prognostic indicator. This study evaluated the use of serial blood SAA concentrations for monitoring of horses with synovial sepsis.MethodsA prospective clinical trial was performed of horses referred to a single hospital with synovial sepsis that survived (n=17), synovial sepsis that were euthanised (n=5), non-septic intrasynovial pathologies (n=14) or extensive extrasynovial lacerations (n=5). SAA concentrations were determined on admission and every 24 hours thereafter. The area under the concentration–time curve from 0 to 144 hours of each group was compared by Kruskal-Wallis and post hoc Dunn’s tests (P<0.05).ResultsSignificant difference in mean blood concentration of SAA was found between synovial sepsis that survived and non-septic pathologies in the first 48 hours, as well as between non-septic intrasynovial pathologies and non-responsive sepsis requiring euthanasia. No difference was found between extensive extrasynovial lacerations and any septic group.ConclusionsWhile serial blood SAA is useful for monitoring clinical response of intrasynovial septic pathologies, interpretation should consider other clinical findings since blood SAA is not a specific marker for synovial sepsis.

Abstract 388: Impact of Individual Acute Phase Serum Amyloid A Isoforms on HDL Metabolism in Mice

2016 ◽  
Vol 36 (suppl_1) ◽  
Author(s):  
Maria C De Beer ◽  
Myung-Hee Kim ◽  
Joanne M Wroblewski ◽  
Richard C Charnigo ◽  
Ailing Ji ◽  
...  
Keyword(s):  
Acute Phase ◽  
Plasma Clearance ◽  
Serum Amyloid A ◽  
Biological Activities ◽  
Acute Phase Reactant ◽  
Serum Amyloid ◽  
Minor Role ◽  
Clearance Rates ◽  
Amyloid A ◽  
Significant Difference

The acute phase reactant serum amyloid A (SAA) is an HDL apolipoprotein that exhibits biological activities as a pro-inflammatory mediator, but its physiological function(s) are poorly understood. Possible functional differences between SAA1.1 and SAA2.1, the two major SAA isoforms, are also unclear. Mice deficient in either SAA1.1 or SAA2.1 were used to investigate SAA isoform plasma clearance rates and effects on HDL structure, composition and apolipoprotein catabolism. The absence of either isoform did not affect the size of the normally enlarged HDL found in acute phase wild type mice, and did not result in significant changes in HDL lipid composition. Plasma clearance rates of normal and acute phase HDL apolipoproteins were determined using native HDL particles. The fractional clearance rates (FCR’s) of apoA-I, apoA-II and SAA were distinct, indicating that neither normal nor acute phase particles are cleared as intact particles. No significant difference was found between the FCR’s of SAA1.1 and SAA2.1 in acute phase mice, suggesting that the selective deposition of SAA1.1 observed in amyloid plaques is not associated with a difference in the rates of plasma clearance of the isoforms. In the absence of the HDL receptor SR-BI, the clearance rate of SAA was reduced by about 30% and remained significantly greater compared to that of apoA-I and apoA-II, indicating a relatively minor role of SR-BI in SAA clearance. These studies contribute to our understanding of the metabolism of SAA and its effects on acute phase HDL composition and catabolism.

scholarly journals Serum amyloid A and muscle activity biomarkers in horses submitted to equestrian show jumping

2019 ◽  
Vol 39 (8) ◽  
pp. 668-671 ◽  
Author(s):  
Wilson P. Carvalho Filho ◽  
Leandro A. Fonseca ◽  
Fabricia M. Girardi ◽  
Lucas D. Bento ◽  
Pollyanna C. Souto ◽  
...  
Keyword(s):  
Muscle Activity ◽  
Repeated Measures ◽  
Serum Amyloid A ◽  
Serum Amyloid ◽  
Amyloid A ◽  
Significant Difference ◽  
Aspartate Amino Transferase ◽  
Jumping Exercise ◽  
Level Of Significance ◽  
Show Jumping

ABSTRACT: The aim of this study was to evaluate the serum amyloid A (SAA) and biomarkers of muscle activity of horses submitted to show jumping activity. To do this, the variables SAA, glucose, lactate and the biomarkers creatine kinase (CK) and aspartate amino transferase (AST) were evaluated in 10 horses submitted to the show jumping exercise in a tournament for beginners. The evaluations occurred before exercise (T0), immediately after (T1), 30 minutes (T2), 60 minutes (T3) and 24 hours after the end (T4). Data were evaluated using analysis of variance for repeated measures. The statistical software SAEG 9.1 was used to verify the level of significance between the moments for P<0.05. Glucose presented a difference between the moments T0 (97.7±13.3mg/dL) and T1 (79.7±14.1mg/dL). Lactate presented elevation in T1 (15.3±6.1mmol/L) compared to the others T0 (3.8±0.8mmol/L), T2 (6.5±3.9mmol/L), T3 (5.3±2.2mmol/L) and T4 (5.1±1.6mmol/L). The CK showed a significant difference between T0 (82.8±51.2U/L) and T1 (140.1±58.5U/L) and between T4 (74.4±43.1U/L) with T1 (140.1±58.5U/L). The AST presented no difference between moments. The show jumping activity with one-meter obstacles did not induce changes in the SAA protein between the moments.

scholarly journals Whole-Blood Validation of a New Point-of-care Equine Serum Amyloid A Assay

2020 ◽  
Vol 94 ◽  
pp. 103222
Author(s):  
Bruno Karam ◽  
Siddra Hines ◽  
Lauren Skipper ◽  
Nicola Pusterla
Keyword(s):  
Whole Blood ◽  
Serum Amyloid A ◽  
Point Of Care ◽  
Serum Amyloid ◽  
Amyloid A

scholarly journals Effects of selected nonsteroidal anti-inflammatory drugs on acute-phase protein levels after dehorning in Holstein heifers

2019 ◽  
Vol 75 (05) ◽  
pp. 6265-2019
Author(s):  
HASAN ERDOGAN ◽  
IBRAHIM AKIN ◽  
KEREM URAL ◽  
PINAR ALKIM ULUTAS
Keyword(s):  
Acute Phase ◽  
Serum Amyloid A ◽  
Acute Phase Proteins ◽  
Serum Amyloid ◽  
Mean Values ◽  
Protein Levels ◽  
Amyloid A ◽  
Flunixin Meglumine ◽  
Significant Difference ◽  
Inflammatory Drugs

The purpose of this study was to evaluate the effects of ketoprofen (KTP), flunixin meglumine (FLM), and meloxicam (MLX) administration on acute-phase proteins after dehorning in Holstein heifers. A total of 21 Holstein heifers were enrolled into three groups of equal size (n=7) and administered ketoprofen, flunixin meglumine, or meloxicam, at doses of 2.2 mg/kg, 1.1 mg/kg, and 1 mg/kg body weight, respectively. Serum amyloid A, haptoglobin, and ceruloplasmin levels were determined before the administration of the three drugs (0 hrs) and at 6, 12, 24, 48, and 96 hours post-administration. The mean values (±SD) obtained revealed no significant alteration in APP levels at 0 hrs in any of the three groups. Time-dependent alterations, however, were significant in all groups. Group-time interactions were significant (P < 0.001) for ceruloplasmin concentrations, whereas results for serum amyloid A and haptoglobin levels were deemed non-significant. Inter-group interaction revealed no significant findings regarding serum amyloid A and ceruloplasmin levels, but haptoglobin levels showed a significant difference between the KTP and FLM groups at 48 hrs. It may therefore be reasonably suggested that KTP, FLM, and MLX could all be administered to effect slight changes in acute phase proteins.

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