scholarly journals Herd-Based Diagnosis of Neospora Caninum-Induced Endemic and Epidemic Abortion in Cows and Evidence for Congenital and Postnatal Transmission

1997 ◽  
Vol 9 (1) ◽  
pp. 44-49 ◽  
Author(s):  
Mark C. Thurmond ◽  
Sharon K. Hietala ◽  
Patricia C. Blanchard
Keyword(s):  
Confidence Interval ◽  
Immunosorbent Assay ◽  
Odds Ratio ◽  
Neospora Caninum ◽  
Strong Association ◽  
Enzyme Linked Immunosorbent Assay ◽  
Postnatal Transmission

Aborting and nonaborting cows and their dams or daughters were studied to determine if herd abortion problems were associated with the presence of Neospora caninum antibodies and to estimate when aborting cows may have acquired the infection. Cows were sampled from 20 herds that had experienced an abortion epidemic presumed to have been caused by N. caninum and from 2 herds experiencing endemic abortion. Seroprevalence for 14 herds experiencing an epidemic ranged from 7% to 70%, as estimated by enzyme-linked immunosorbent assay. A strong association between seropositivity and abortion was found for only 5 of 14 herds with a presumed diagnosis of N. caninum abortion ( P ≤ 0.015, lower 95% confidence interval of odds ratio ≥ 1.2), indicating N. caninum may be overdiagnosed as the cause of an abortion epidemic in some herds. No association was found between dam and daughter seropositivity for herds experiencing an epidemic ( P ≥ 0.17), suggesting that most cows aborting during an epidemic were infected postnatally. For the 2 herds with endemic abortion (A, B), odds of an aborting cow having N. caninum antibodies were 3.4-fold (herd A) and 7.0-fold (herd B) higher than odds for nonaborting cows ( P ≤ 0.05). Cows that aborted a fetus infected with N. caninum were more likely to have had a previous seropositive daughter than were nonaborting seronegative cows ( P ≤ 0.0025), suggesting that infection had been acquired before conception of the aborted fetus.

scholarly journals Prevalence and risk factors of Neospora caninum infection in ovine flocks of central-western Mexico

2019 ◽  
Vol 67 (1) ◽  
pp. 51-59 ◽  
Author(s):  
Jesús Manuel Romo-Gallegos ◽  
Carlos Cruz-Vázquez ◽  
Leticia Medina-Esparza ◽  
Miguel Ramos-Parra ◽  
Dora Romero-Salas
Keyword(s):  
Risk Factors ◽  
Confidence Interval ◽  
Odds Ratio ◽  
Animal Species ◽  
Neospora Caninum ◽  
Domestic Animal ◽  
Caninum Infection ◽  
Blood Samples ◽  
Western Mexico ◽  
The Mean

This study, carried out in 13 sheep flocks of central-western Mexico, aimed to identify the prevalence of anti-N. caninum antibodies, to develop a risk analysis of the infection and to estimate the prevalence of parasite DNA in blood. A total of 368 serum and blood samples were subjected to ELISA and PCR tests, respectively, and the association between the prevalence of antibodies and some management factors was estimated. The overall prevalence of anti-N. caninum antibodies was 13.5% [50/368; 95% confidence interval (CI) 10–17], ranging from 2.7 to 90% per flock, and 92% of the farms had seropositive animals. In ewes the prevalence was 14% (48/348, 95% CI 10–17) and in rams 10% (2/20; 95% CI 1– 33). The mean prevalence of Neospora DNA in blood was 27% (99/368, 95% CI 22–31), implying a range between 16 and 82%. In rams, the prevalence was 5% (1/20 95% CI 2–26), while in ewes it was 28% (98/348, 95% CI 23–33). The agreement between the tests was k = 0.19. The presence of other domestic animal species in the farms [odds ratio (OR) 4.4] and the consumption of placental debris, fetuses and stillborn lambs by dogs living in the farms (OR 5.8) were demonstrated to be risk factors.

Association of ficolin-2 gene polymorphisms and susceptibility to systemic lupus erythematosus in Egyptian children and adolescents: a multicenter study

Lupus ◽  
2019 ◽  
Vol 28 (8) ◽  
pp. 995-1002 ◽  
Author(s):  
M A Elkoumi ◽  
A A Emam ◽  
M A N Allah ◽  
A H Sherif ◽  
N M Abdelaal ◽  
...  
Keyword(s):  
Lupus Nephritis ◽  
Confidence Interval ◽  
Children And Adolescents ◽  
Multicenter Study ◽  
Odds Ratio ◽  
Gene Polymorphisms ◽  
Enzyme Linked Immunosorbent Assay ◽  
Promoter Polymorphisms ◽  
Intron 1 ◽  
Egyptian Children

Background Pediatric-onset SLE (pSLE) is a multisystem autoimmune disease. Recently, the ficolin-2 (FCN2) gene has emerged as a potential candidate gene for susceptibility to SLE. Objectives The objective of this study was to evaluate the association of the FCN2 gene polymorphisms at positions −986 (G/A), −602 (G/A), −4 (A/G) and SNP C/T (rs3124954) located in intron 1, with susceptibility to pSLE in Egyptian children and adolescents. Methods This was a multicenter study of 280 patients diagnosed with pSLE, and 280 well-matched healthy controls. The FCN2 promoter polymorphisms at –986 G/A (rs3124952), −602 G/A (rs3124953), −4 A/G (rs17514136) and SNP C/T (rs3124954) located in intron 1 were genotyped by polymerase chain reaction, while serum ficolin-2 levels were assessed using enzyme-linked immunosorbent assay. Results The frequencies of the FCN2 GG genotype and G allele at −986 and −602 positions were significantly more represented in patients with pSLE than in controls ( p < 0.001). Conversely, the FCN2 AA genotype and A allele at position −4 were more common in patients than in controls ( p < 0.001). Moreover, patients carrying the FCN2 GG genotype in −986 position were more likely to develop lupus nephritis (odds ratio: 2.6 (95% confidence interval: 1.4–4.78); p = 0.006). The FCN2 AA genotype at position −4 was also identified as a possible risk factor for lupus nephritis (odds ratio: 3.12 (95% confidence interval: 1.25–7.84); p = 0.024). Conclusion The FCN2 promoter polymorphisms may contribute to susceptibility to pSLE in Egyptian children and adolescents. Moreover, the FCN2 GG genotype at position −986 and AA genotype at position −4 were associated with low serum ficolin-2 levels and may constitute risk factors for lupus nephritis in pSLE.

scholarly journals Comparison of the Serum Neutralization Test and a Competitive Enzyme-Linked Immunosorbent Assay for the Detection of Antibodies to Vesicular Stomatitis Virus New Jersey and Vesicular Stomatitis Virus Indiana

2002 ◽  
Vol 14 (3) ◽  
pp. 240-242 ◽  
Author(s):  
Juan Francisco Alvarado ◽  
Gaby Dolz ◽  
Marco V. Herrero ◽  
Brian McCluskey ◽  
Mo Salman
Keyword(s):  
New Jersey ◽  
Confidence Interval ◽  
Vesicular Stomatitis Virus ◽  
Immunosorbent Assay ◽  
Neutralization Test ◽  
Enzyme Linked Immunosorbent Assay ◽  
Serum Samples ◽  
Serum Neutralization ◽  
Serum Neutralization Test ◽  
Vesicular Stomatitis

A competitive enzyme-linked immunosorbent assay (C-ELISA) for the detection of antibodies against vesicular stomatitis virus New Jersey (VSV-NJ) and vesicular stomatitis virus Indiana (VSV-IN) was compared with the serum neutralization test (SNT) using 1,106 serum samples obtained from dairy cattle on sentinel study farms in the Poás region of Costa Rica. Kappa coefficients between the C-ELISA and the SNT were 0.8871 (95% confidence interval [CI]: 0.8587–0.9155) and 0.6912 (95% CI: 0.6246–0.7577) for the VSV-NJ and VSV-IN tests, respectively. These results indicate good to excellent agreement between the 2 tests under these conditions.

scholarly journals Development of Rapid Immunochromatographic Test with Recombinant NcSAG1 for Detection of Antibodies to Neospora caninum in Cattle

2005 ◽  
Vol 12 (7) ◽  
pp. 885-887 ◽  
Author(s):  
Min Liao ◽  
Shoufa Zhang ◽  
Xuenan Xuan ◽  
Guohong Zhang ◽  
Xiaohong Huang ◽  
...  
Keyword(s):  
Immunosorbent Assay ◽  
Rapid Detection ◽  
Reliable Method ◽  
Neospora Caninum ◽  
Antibody Test ◽  
Enzyme Linked Immunosorbent Assay ◽  
Immunochromatographic Test ◽  
Serum Samples ◽  
Immunofluorescent Antibody Test ◽  
Good Agreement

ABSTRACT An immunochromatographic test (ICT) with recombinant surface antigen 1 of Neospora caninum (NcSAG1) was developed for the rapid detection of antibodies to N. caninum in cattle. The ICT was used to clearly discriminate between immunofluorescent-antibody test (IFAT)-positive bovine sera and IFAT-negative bovine sera. Serum samples collected from cattle in Yanbian, China, were examined by the ICT. Of the 96 serum samples, 23 (24.0%) were positive by the ICT, and 19 (19.8%) samples were positive by a previously developed enzyme-linked immunosorbent assay (ELISA). Eighteen of 19 ELISA-positive samples were positive according to the ICT. A good agreement was found between the results of the ICT and the ELISA. The results presented here suggest that the ICT with recombinant truncated NcSAG1 fused to glutathione S-transferase is a useful and reliable method for the detection of antibodies to N. caninum in cattle.

scholarly journals Seroprevalence of Neospora caninum in repeat breeder dairy cows in Turkey* (short communication)

2008 ◽  
Vol 51 (2) ◽  
pp. 143-148 ◽  
Author(s):  
S. Simsek ◽  
A. E. Utuk ◽  
E. Koroglu ◽  
N. Dumanli ◽  
A. Risvanli
Keyword(s):  
Dairy Cows ◽  
Immunosorbent Assay ◽  
Significant Relationship ◽  
Short Communication ◽  
Neospora Caninum ◽  
Age Groups ◽  
Enzyme Linked Immunosorbent Assay ◽  
Caninum Antibody ◽  
Sera Samples ◽  
Repeat Breeder

Abstract. Sera samples from 89 dairy cows with repeat breeder and 94 healthy pregnant dairy cows (controls) from Elazig province of eastern Turkey were tested for presence of Neospora caninum antibodies by use of a competitive enzyme linked immunosorbent assay (cELISA). Fifteen out of 183 cows tested (8.19%) were found to be seropositive to N. caninum antibody. Overall, seroprevalence of N. caninum was significantly higher (P<0.05) in dairy cows with repeat breeder (13.48%, 12/89) than in dairy cows with healthy pregnant (3.19%, 3/94). There was no statistically significant relationship between seroprevalence and breed and age groups in cows with repeat breeder (P>0.05). In conclusion, the current study highlights the importance of N. caninum in cows with repeat breeder.

Antibody profiles for the diagnosis of antiphospholipid syndrome

2005 ◽  
Vol 93 (06) ◽  
pp. 1147-1152 ◽  
Author(s):  
Alessandra Biasiolo ◽  
Cinzia Pegoraro ◽  
Umberto Cucchini ◽  
Franco Noventa ◽  
Sabino Iliceto ◽  
...  
Keyword(s):  
Risk Factors ◽  
Risk Factor ◽  
Confidence Interval ◽  
Antiphospholipid Syndrome ◽  
Odds Ratio ◽  
Obstetric Complications ◽  
Antibody Detection ◽  
Enzyme Linked Immunosorbent Assay ◽  
Antiphospholipid Antibody ◽  
Arterial Thromboembolism

SummaryAmong the so called‘antiphospholipid antibodies’, the presence of Lupus Anticoagulant (LA) is associated with thrombosis-related events and defines the antiphospholipid syndrome. The role of anti-cardiolipin (aCL) antibodies and anti-human β2-glycoprotein I (aβ2GPI) antibodies is less striking. Since the problem of standardization for these tests is far from resolved, we evaluated whether the combination of results (antiphospholipid laboratory profiles) could help to better classify these patients. Over a 6-year period, 618 consecutive subjects (55% of whom had previous documented thrombosis-related events) were referred to our clinic for Antiphospholipid antibody detection. LA was detected according to internationally accepted recommendations. ACL and aβ2GPI antibodies were detected by Enzyme-Linked-Immunosorbent Assay (ELISA). Patients’ records were reviewed for the presence of previous thromboembolic events or obstetric complications according to Sapporo’s clinical criteria for the diagnosis of antiphospholipid syndrome (APS) and each patient underwent a physical examination. When individual tests were considered in a multivariate analysis which took into account age, gender, the presence of SLE or other autoimmune diseases and established risk factors for venous and arterial thromboembolism, LA (Odds Ratio 4.4, Confidence Interval 1.5–13.3) and aβ2GPI antibodies (Odds Ratio 2.9, Confidence Interval 1.1–7.5) but not aCL antibodies (Odds Ratio 1.2, Confidence Interval 0.5–2.7) were found to be independent risk factors for thrombosis-related events. When antiphospholipid antibody profiles instead of individual test positivity were analyzed in the above mentioned model, triple positivity resulted a strong independent risk factor (Odds Ratio 33.3, Confidence Interval 7.0–157.6), retaining its significance when the association with venous or arterial thromboembolism was considered. Double positivity with negative LA was close to significance for thrombosis-related events (Odds Ratio 2.2, Confidence Interval1.0–5.2, p=0.056) and highly significant risk factor for obstetric complications (Odds Ratio 10.8, Confidence Interval 2.9–40.8). Other combinations did not reach statistical significance. The mean level of IgG aβ2GPI antibodies was statistically higher in triple positive profile and might account for positive LA. As compared to a single test, the analysis of a complete antiphospholipid antibody profile can better determine patients at risk.

scholarly journals A Dual-Antigen Enzyme-Linked Immunosorbent Assay Allows the Assessment of Severe Acute Respiratory Syndrome Coronavirus 2 Antibody Seroprevalence in a Low-Transmission Setting

2020 ◽  
Vol 223 (1) ◽  
pp. 10-14 ◽  
Author(s):  
Sarah M Hicks ◽  
Kai Pohl ◽  
Teresa Neeman ◽  
Hayley A McNamara ◽  
Kate M Parsons ◽  
...  
Keyword(s):  
Severe Acute Respiratory Syndrome ◽  
Confidence Interval ◽  
Sensitivity And Specificity ◽  
Immunosorbent Assay ◽  
Elective Surgery ◽  
Enzyme Linked Immunosorbent Assay ◽  
Receptor Binding Domain ◽  
Assay Sensitivity ◽  
Specific Antibodies ◽  
Transmission Setting

Abstract Estimates of seroprevalence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) antibodies have been hampered by inadequate assay sensitivity and specificity. Using an enzyme-linked immunosorbent assay–based approach that combines data about immunoglobulin G responses to both the nucleocapsid and spike receptor binding domain antigens, we show that excellent sensitivity and specificity can be achieved. We used this assay to assess the frequency of virus-specific antibodies in a cohort of elective surgery patients in Australia and estimated seroprevalence in Australia to be 0.28% (95% Confidence Interval, 0–1.15%). These data confirm the low level of transmission of SARS-CoV-2 in Australia before July 2020 and validate the specificity of our assay.

Detection of Antibodies to Neospora caninum in Cattle by Enzyme-Linked Immunosorbent Assay with Truncated NcSRS2 Expressed in Escherichia coli

2005 ◽  
Vol 91 (1) ◽  
pp. 191-192 ◽  
Author(s):  
Irungu Gaturaga ◽  
Bayin Chahan ◽  
Xuenan Xuan ◽  
Xiaohong Huang ◽  
Min Liao ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Immunosorbent Assay ◽  
Neospora Caninum ◽  
Enzyme Linked Immunosorbent Assay
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