scholarly journals Astragalus Polysaccharides Enhance the Immune Response to Newcastle Disease Virus Vaccination in Chickens

2021 ◽  
Vol 23 (1) ◽  
Author(s):  
Naji A .I . ◽  
◽  
Huda S.J ◽  
Keyword(s):  
Antibody Titer ◽  
Normal Saline ◽  
Sandwich Elisa ◽  
Serum Antibody ◽  
Elisa Test ◽  
Rt Pcr ◽  
High Concentration ◽  
Serum Samples ◽  
Astragalus Polysaccharide ◽  
Serum Antibody Titer

This study was conducted to evaluated the effects of Astragalus polysaccharide on immune responses of chickens immunized with NDV Lasota vaccine. One hundred chickens at one-day-old( Ross breed) were brought , on five day of age, the average maternal serum Abs was measured by hemaglutination inhibition (HI) test and the titer was 3.43 log, and then divided into five equal groups in each group twenty chicks and on day 10 of age the Astragalus polysaccharide high concentration (APSH) group were given 0.5 ml at 400mg /100ml , the Astragalus polysaccharide medium concentration (APSM )group were given 0.5 ml at 200mg /100ml, the Astragalus polysaccharide low concentration (APSL) group were given 0.5 ml at 100mg /100ml , Vaccine control (VC) group were given 0.5 ml normal saline only, Negative control (NC ) group were given normal saline only , all groups orally administrated for four days. At 14 day of age, all chickens with the exception of NC group , were vaccinated with ND Lasota by Intraocular and Intranasal methods. Four blood sample from all groups were aspirated from jugular vein at 0h (before vaccination),6h,12h and 24h(after vaccination ) for determine of Chicken IL-6(Interleukin 6) by RT-PCR. On day 20and 30 of age after vaccination , three chicken were sampled randomly from each group to detect specific serum Antibody titer of NDV by HI test. On days 1,7,14,21after vaccination, four serum Samples from the same of chicken to determines IgA level by sandwich ELISA test. The cellular and humeral response including the production of cytokine IL-6 ( by RT-PCR test) were measured on 0h(before vaccination),6h,12h and 24h( after vaccination )and IgA antibody ( by ELISA test ) were measured on 1d,7d,14d,and 21days after vaccination and serum antibody titer Specific to NDV( by HI test ) were measured at age 20, and 30 days after vaccination evaluated by series of experiments. Results revealed that all the polysaccharide groups were numerically increased in antibody levels, the expression of IL-6and IgA level ,but three parameter were significant (𝑃 < 0.05) in the APSH group compared to corresponding (VC) vaccinated group and( NC) non –vaccinated group. These results suggest that orally administered APS could significantly enhance the efficacy of NDV vaccination and has important implications for the further use of APS as a novel adjuvant.

scholarly journals Astragalus Polysaccharides Enhance the Immune Response to Newcastle Disease Virus Vaccination in Chickens

2021 ◽  
Vol 23 (1) ◽  
Author(s):  
Naji A.I ◽  
◽  
Huda S.J ◽  
Keyword(s):  
Antibody Titer ◽  
Normal Saline ◽  
Sandwich Elisa ◽  
Serum Antibody ◽  
Elisa Test ◽  
Rt Pcr ◽  
High Concentration ◽  
Serum Samples ◽  
Astragalus Polysaccharide ◽  
Serum Antibody Titer

This study was conducted to evaluated the effects of Astragalus polysaccharide on immune responses of chickens immunized with NDV Lasota vaccine. One hundred chickens at one-day-old( Ross breed) were brought , on five day of age, the average maternal serum Abs was measured by hemaglutination inhibition (HI) test and the titer was 3.43 log, and then divided into five equal groups in each group twenty chicks and on day 10 of age the Astragalus polysaccharide high concentration (APSH) group were given 0.5 ml at 400mg /100ml , the Astragalus polysaccharide medium concentration (APSM )group were given 0.5 ml at 200mg /100ml, the Astragalus polysaccharide low concentration (APSL) group were given 0.5 ml at 100mg /100ml , Vaccine control (VC) group were given 0.5 ml normal saline only, Negative control (NC ) group were given normal saline only , all groups orally administrated for four days. At 14 day of age, all chickens with the exception of NC group , were vaccinated with ND Lasota by Intraocular and Intranasal methods. Four blood sample from all groups were aspirated from jugular vein at 0h (before vaccination),6h,12h and 24h(after vaccination ) for determine of Chicken IL-6(Interleukin 6) by RT-PCR. On day 20and 30 of age after vaccination , three chicken were sampled randomly from each group to detect specific serum Antibody titer of NDV by HI test. On days 1,7,14,21after vaccination, four serum Samples from the same of chicken to determines IgA level by sandwich ELISA test. The cellular and humeral response including the production of cytokine IL-6 ( by RT-PCR test) were measured on 0h(before vaccination),6h,12h and 24h( after vaccination )and IgA antibody ( by ELISA test ) were measured on 1d,7d,14d,and 21days after vaccination and serum antibody titer Specific to NDV( by HI test ) were measured at age 20, and 30 days after vaccination evaluated by series of experiments. Results revealed that all the polysaccharide groups were numerically increased in antibody levels, the expression of IL-6and IgA level ,but three parameter were significant (𝑃 < 0.05) in the APSH group compared to corresponding (VC) vaccinated group and( NC) non –vaccinated group. These results suggest that orally administered APS could significantly enhance the efficacy of NDV vaccination and has important implications for the further use of APS as a novel adjuvant.

scholarly journals Lack of evidence of porcine reproductive and respiratory syndrome virus (PRRSV) infection in domestic swine in Brazil

2004 ◽  
Vol 34 (2) ◽  
pp. 449-455 ◽  
Author(s):  
Janice Reis Ciacci-Zanella ◽  
Cristiano Trombetta ◽  
Ildara Vargas ◽  
Denise Euclydes Mariano da Costa
Keyword(s):  
Genetic Material ◽  
Elisa Test ◽  
Respiratory Syndrome Virus ◽  
Rt Pcr ◽  
Serum Samples ◽  
Viral Isolation ◽  
Culture Cells ◽  
Commercial Kits ◽  
Swine Herds ◽  
Domestic Swine

This report describes the first prevalence of antibodies and experimental inoculation of suspected samples of porcine reproductive and respiratory syndrome virus (PRRSV) from ELISA positive pigs from swine herds in Brazil. Based on the hypothesis that this agent is present in swine herds worldwide, the objective of this work was to establish a diagnostic methodology and to investigate the occurrence of PRRSV in Brazilian swine herds. Fifty-four swine herds, the total number which imported genetic material (live pigs or swine semen) from countries where PRRS was endemic from 1990 to December 2000, from eight Brazilian States all included in this study. The sampling used was such as to detect a prevalence of infection of 5%, with a confidence level of 95%. A total of 3785 serum samples were tested for PRRSV antibodies by ELISA. Following the ELISA test, which was performed with two different commercial kits, all serum positive pigs were retested, examined and additional materials were collected. Viral isolation in permissive tissue culture cells and swine bioassays were performed. Additionally, reverse transcriptase polymerase chain reaction (RT-PCR) and nested RT-PCR were also performed. We could not demonstrate the presence of PRRSV or RNA of PRRSV by viral isolation or RT-PCR (or nested RT-PCR), respectively in all of the analyzed samples. Furthermore, the pigs inoculated with PRRSV suspicion samples did not seroconvert nor produce characteristic PRRS lesions in the swine bioassay. Thus, our results indicate no evidence of PRRSV in the samples analyzed from swine herds in this study.

scholarly journals Is contamination of bovine-sourced material with bovine viral diarrhea virus still a problem in countries with ongoing eradication campaigns?

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Aleksandra Antos ◽  
Jerzy Rola ◽  
Michał Bednarski ◽  
Michał Konrad Krzysiak ◽  
Julia Kęsik-Maliszewska ◽  
...  
Keyword(s):  
Bovine Viral Diarrhea Virus ◽  
Genetic Material ◽  
Elisa Test ◽  
Bovine Viral Diarrhea ◽  
Rt Pcr ◽  
Serum Samples ◽  
Viral Pathogens ◽  
Diarrhea Virus ◽  
Viral Diarrhea ◽  
Viral Diarrhea Virus

AbstractIn this report, we describe the detection of bovine viral diarrhea virus (BVDV) contamination in commercial animal-derived sera and vaccines against animal viral pathogens on the market in Poland. Antibodies against BVDV were detected in 4/45 sera samples (8.9%) using an ELISA test. The presence of BVDV antigen using ELISA was found using ELISA in 3/45 serum samples (6.6%) and 18/172 vaccine samples (10.5%). An RT-PCR was conducted using primers targeting two genome regions, the five prime untranslated region (5’UTR) and N-terminal protease (Npro). BVDV RNA was detected in 33/45 (73.3%) of sera, and 11/172 samples (6.4%) of collected vaccines, of which one vaccine did not declare BVDV strain in its composition. A single serum showed the presence of an infectious virus and only one was contaminated with all 3 species of BVDV. The most frequent species in sera was BVDV-3 (75.5%), whereas in vaccines only BVDV-1 was identified. Sequence analysis showed that the tested commercial sera and one vaccine were contaminated by six genotypes of BVDV: -1a, -1b, -1c, -1d, -2a, and -3. Identification of BVDV and its genetic material in animal-derived products is important due to the possibility of pestivirus transmission as well as the chance of falsifying the results of a diagnostic test. It also demonstrates the necessity of rigorous monitoring of the bioproducts used in the laboratory and industry level.

scholarly journals Prevalence of Nonclinical Moraxella Bovis Infections in Bulls as Determined by Ocular Culture and Serum Antibody Titer

1992 ◽  
Vol 4 (1) ◽  
pp. 78-79 ◽  
Author(s):  
T. A. Powe ◽  
K. E. Nusbaum ◽  
T. R. Hoover ◽  
S. R. Rossmanith ◽  
P. C. Smith
Keyword(s):  
Antibody Titer ◽  
Serum Antibody ◽  
Moraxella Bovis ◽  
Serum Antibody Titer

scholarly journals Antibody Titer Kinetics and SARS-CoV-2 Infections Six Months after Administration with the BNT162b2 Vaccine

Vaccines ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 1357
Author(s):  
Davide Ferrari ◽  
Nicola Clementi ◽  
Elena Criscuolo ◽  
Alessandro Ambrosi ◽  
Francesca Corea ◽  
...  
Keyword(s):  
Antibody Titer ◽  
Nucleocapsid Protein ◽  
Serum Antibody ◽  
Humoral Response ◽  
Vaccine Response ◽  
Post Vaccination ◽  
Neutralization Activity ◽  
Order Of Magnitude ◽  
Serum Antibody Titer

Background: Studies reporting the long-term humoral response after receiving the BNT162b2 COVID-19 vaccine are important to drive future vaccination strategies. Yet, available literature is scarce. Covidiagnostix is a multicenter study designed to assess the antibody response in >1000 healthcare professionals (HCPs) who received the BNT162b2 vaccine. Methods: Serum was tested at time-0 (T0), before the first dose, T1, T2, and T3, respectively, 21, 42, and 180 days after T0. Antibodies against the SARS-CoV-2 nucleocapsid-protein were measured to assess SARS-CoV-2 infections, whereas antibodies against the receptor-binding domain of the spike protein were measured to assess the vaccine response. Neutralization activity against the D614G, B.1.1.7, and B.1.351 variants were also analyzed. Results: Six months post-vaccination HCPs showed an antibody titer decrease of approximately 70%, yet, the titer was still one order of magnitude higher than that of seropositive individuals before vaccination. We identified 12 post-vaccination infected HCPs. None showed severe symptoms. Interestingly, most of them showed titers at T2 above the neutralization thresholds obtained from the neutralization activity experiments. Conclusion: Vaccination induces a humoral response which is well detectable even six months post-vaccination. Vaccination prevents severe COVID-19 cases, yet post-vaccination infection is possible even in the presence of a high anti-S serum antibody titer.

Novel malignant-mesothelioma-associated antigens (Gene-X and THBS-2) in the diagnosis of malignant pleural mesothelioma (MPM).

2012 ◽  
Vol 30 (15_suppl) ◽  
pp. 10585-10585
Author(s):  
Fumihiro Tanaka ◽  
Yoshiki Shigematsu ◽  
Takeshi Hanagiri ◽  
Hidetaka Uramoto ◽  
Tomoko So ◽  
...  
Keyword(s):  
Antibody Titer ◽  
Malignant Pleural Mesothelioma ◽  
Early Stage ◽  
Asbestos Exposure ◽  
Serum Antibody ◽  
Diagnostic Value ◽  
Pleural Mesothelioma ◽  
Roc Curve Analysis ◽  
Antibody Titers ◽  
Serum Antibody Titer

10585 Background: Malignant pleural mesothelioma (MPM) is a highly aggressive malignant tumor of the pleura associated with asbestos exposure, and its diagnosis is usually difficult at early stage. We identified novel mesothelioma-related antigens, Gene-X and thrombospondin-2 (THBS-2), recognized by tumor-infiltrating B cells (Cancer Sci 2009), but the clinical significance in the diagnosis of MPM remains unclear. Methods: A total of 120 patients, who presented with a suspicion of MPM and received pleural biopsy, were reviewed; 97 patients were finally diagnosed with MPM and 27 were with non-malignant diseases (NM). The antibody-titers against Gene-X and THBS-2 in the sera were measured by ELISA method. Results: The serum antibody-titer against THBS-2 was significantly higher in MPM patients than in NM (P<0.01), but there was no difference in the serum antibody-titer against Gene-X (Table). The receiver operating characteristic (ROC) curve analysis showed a significant diagnostic value of serum antibody-titer against THBS-2 with the area-under curve of 0.886 (95% CI, 0.797 - 0.975; P<0.001) in discrimination of MPM from NM diseases; the sensitivity and specificity, when the cut-off value was 0.08, were 72.2% and 95.5%, respectively. Conclusions: The serum antibody-titer against THBS-2 can be a useful non-invasive marker in the diagnosis of MPM. [Table: see text]

Prevalence of hepatitis E virus in thalassemia patients with hepatitis C in Tehran, Iran

2020 ◽  
Author(s):  
Najmeh Dalvand ◽  
Azadeh Dalvand ◽  
Zohreh Sharifi ◽  
Seyed Masoud Hosseini
Keyword(s):  
Risk Groups ◽  
Hepatitis E ◽  
Oral Route ◽  
Elisa Test ◽  
Seroprevalence Rate ◽  
Rt Pcr ◽  
Serum Samples ◽  
Thalassemia Patient ◽  
Significant Difference ◽  
Tehran Province

Background and Objectives: HEV infection is predominantly spread via the fecal-oral route; however, due to the presence of HEV RNA in the serum of healthy blood donors, there is a possibility of the transmissibility of HEV infection through blood. Multi-transfused thalassemia patients are one of the high risk groups for blood borne viruses. In this study, we evaluated the prevalence of HEV antibodies and HEV-RNA in thalassemia patients with HCV infection. Materials and Methods: 120 anti-HCV positive thalassemia patient serum samples from Tehran province during April-June 2019 were assessed for the presence of total anti-HEV antibodies using of HEV Ab ELISA kit. All serum samples were assayed by Nested RT-PCR to detect HEV-RNA. Results: The results of ELISA test showed that 2 out of 120 (1.67%) samples were positive for anti-HEV Ab. There was no statistically significant difference between anti-HEV antibody prevalence rate and sex, age and other risk factors. None of 120 (0.00%) samples were positive for HEV-RNA by Nested RT-PCR. Conclusion: Seroprevalence of HEV in our study group was 1.67% which is less than HEV seroprevalence rate in Iranian general population. Therefore, it can be conclude that transmission of HEV infection via blood transfusion seems to be uncommon in Iran and the fecal-oral route can be the predominant mode of transmission in Iran; however, more studies are required to confirm this issue.

Lethal Encephalitis in 14-Day-Old Mice Given Avirulent Semliki Forest Virus

1978 ◽  
Vol 15 (3) ◽  
pp. 393-399 ◽  
Author(s):  
M. Chew-Lim
Keyword(s):  
Antibody Titer ◽  
Semliki Forest Virus ◽  
Serum Antibody ◽  
Pyramidal Cells ◽  
Old Mice ◽  
Serum Antibody Titer

Avirulent Semliki Forest Virus when inoculated intracerebrally and intraperitoneally into 14-day-old Swiss A2G mice induced a lethal encephalitis. There was destruction of neurones, especially pyramidal cells of the hippocampus, despite a rising serum antibody titer.

Sign in / Sign up

Export Citation Format

Share Document