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Sotolongo-Rodríguez D, Gomez-Flores R, Navarro-Soto MC, Arellano-Reynoso B, Tamez-Guerra P, Ramírez-Pfeiffer C. Evaluation of the Fluorescence Polarization Assay for the Diagnosis of Brucellosis in Goat Milk. Vet Sci 2022; 9:vetsci9060303. [PMID: 35737355 PMCID: PMC9229069 DOI: 10.3390/vetsci9060303] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 06/09/2022] [Accepted: 06/16/2022] [Indexed: 11/23/2022] Open
Abstract
The milk ring test is a detection assay for antibodies against Brucella in bovine milk. It has good sensitivity but tends to give false positive results. In this study, we standardized the application of the fluorescence polarization assay (FPA) for the detection of antibodies against B.melitensis in goat milk. We obtained negative serum and milk samples from healthy goat flocks in the northern zone of Nuevo León. Positive milk and negative, weak, and strong controls were obtained by mixing volumes of positive control serum with negative control milk. Milk samples were treated with citric acid, after which an FPA was performed. Results were then compared with the Rose Bengal test and the FPA in serum. Milk treatment allowed the quantification of antibodies in samples. Significant differences were found between the 2%, 4%, and 6% groups, compared with the control group (F3, 67 = 17.45, p < 0.0001) but not between the 2% and 4% groups (p = 0.0718). The cut-off value was 74.1 mP, with a sensitivity (Se) of 95% and a specificity (Sp) of 100%. Se and Sp values in field milk samples were 84% and 74.55%, respectively. Despite the FPA test on milk samples showed lower Se and Sp than the FPA test on serum samples, its cutoff may be adjusted. It may be recommended as a screening test in goat milk and become useful for the control and eradication of the disease.
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Affiliation(s)
- Dianelys Sotolongo-Rodríguez
- Departamento de Microbiología e Inmunología, Facultad de Ciencias Biológicas, Universidad Autónoma de Nuevo León, San Nicolás de los Garza C.P. 66450, Nuevo León, Mexico; (D.S.-R.); (P.T.-G.)
| | - Ricardo Gomez-Flores
- Departamento de Microbiología e Inmunología, Facultad de Ciencias Biológicas, Universidad Autónoma de Nuevo León, San Nicolás de los Garza C.P. 66450, Nuevo León, Mexico; (D.S.-R.); (P.T.-G.)
- Correspondence: (R.G.-F.); (C.R.-P.)
| | - Magda Celina Navarro-Soto
- Departamento de Inmunología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Nuevo León, Escobedo C.P. 66054, Nuevo León, Mexico;
| | - Beatriz Arellano-Reynoso
- Departamento de Microbiología e Inmunología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Ciudad Universitaria, Coyoacán C.P. 04510, Ciudad de México, Mexico;
| | - Patricia Tamez-Guerra
- Departamento de Microbiología e Inmunología, Facultad de Ciencias Biológicas, Universidad Autónoma de Nuevo León, San Nicolás de los Garza C.P. 66450, Nuevo León, Mexico; (D.S.-R.); (P.T.-G.)
| | - Carlos Ramírez-Pfeiffer
- Coordinación de Investigación Institucional, Universidad México Americana del Norte, Ciudad Reynosa C.P. 88640, Tamaulipas, Mexico
- Correspondence: (R.G.-F.); (C.R.-P.)
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Kalleshamurthy T, Skariah S, Rathore Y, Ramanjinappa KD, Nagaraj C, Shome BR, Rahman H, Barman NN, Shome R. Comparative evaluation of fluorescence polarization assay and competitive ELISA for the diagnosis of bovine brucellosis vis-a-vis sero-monitoring. J Microbiol Methods 2020; 170:105858. [PMID: 32014437 DOI: 10.1016/j.mimet.2020.105858] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 01/30/2020] [Accepted: 01/31/2020] [Indexed: 02/02/2023]
Abstract
Brucellosis is an important zoonosis that constitutes a serious public health hazard which is caused by a bacterium belonging to the genus Brucella. In the present study, two highly specific serological tests for brucellosis diagnosis, fluorescence polarization assay (FPA) and competitive ELISA (cELISA) were standardized in the laboratory, evaluated and compared with rose bengal plate test (RBPT), indirect ELISA (iELISA) and commercial cELISA kit. For test evaluation, 1386 serum samples [apparently healthy animals (n = 260), samples from Brucella infected farms (n = 701) and B. abortus S19 vaccinated animals (n = 425)] were analyzed to assess suitable diagnostic test in B. abortus S19 post vaccinated bovine population. In apparently healthy brucellosis free farms, RBPT, iELISA, in-house FPA and cELISA were found to be highly specific than commercial cELISA. Commercial cELISA kit was comparatively more sensitive than other serological tests in samples collected from infected farms. The FPA showed sensitivity nearly equal to RBPT and in-house cELISA showed greater sensitivity than RBPT in infected farms. In animals with persistent vaccinal antibodies, only in-house FPA and cELISA recorded higher specificity of 87.64 and 90.27%, respectively. The other tests, RBPT and iELISA displayed similar reactivity with vaccine antibodies to that of infection antibodies whereas commercial cELISA kit showed an intermediate specificity of 47.69%. With these findings, RBPT, iELISA and cELISA are suggested for screening infected herds, and in-house developed FPA and cELISA tests with a proven specificity can be used for confirmatory diagnosis of brucellosis in B. abortus S19 post vaccinated animal populations.
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Affiliation(s)
- Triveni Kalleshamurthy
- Indian Council of Agricultural Research -National Institute of Veterinary Epidemiology and Disease Informatics (ICAR- NIVEDI), Yelahanka, Bengaluru 560 064, India; Jain University, Centre for Post Graduate Studies, Jayanagar, Bengaluru 560041; India
| | - Somy Skariah
- Indian Council of Agricultural Research -National Institute of Veterinary Epidemiology and Disease Informatics (ICAR- NIVEDI), Yelahanka, Bengaluru 560 064, India
| | - Yashaswini Rathore
- Indian Council of Agricultural Research -National Institute of Veterinary Epidemiology and Disease Informatics (ICAR- NIVEDI), Yelahanka, Bengaluru 560 064, India
| | - Kavana D Ramanjinappa
- Indian Council of Agricultural Research -National Institute of Veterinary Epidemiology and Disease Informatics (ICAR- NIVEDI), Yelahanka, Bengaluru 560 064, India
| | - Chaitra Nagaraj
- Indian Council of Agricultural Research -National Institute of Veterinary Epidemiology and Disease Informatics (ICAR- NIVEDI), Yelahanka, Bengaluru 560 064, India
| | - Bibek Ranjan Shome
- Indian Council of Agricultural Research -National Institute of Veterinary Epidemiology and Disease Informatics (ICAR- NIVEDI), Yelahanka, Bengaluru 560 064, India
| | - Habibur Rahman
- International Livestock Research Institute (ILRI), Block-C, First Floor, NASC Complex, CG Centre, DPS Marg, Pusa, New Delhi 110 012, India
| | - Nagendra Nath Barman
- Department of Microbiology, College of Veterinary Sciences, Khanapara, Guwahati 781022, Assam, India
| | - Rajeswari Shome
- Indian Council of Agricultural Research -National Institute of Veterinary Epidemiology and Disease Informatics (ICAR- NIVEDI), Yelahanka, Bengaluru 560 064, India.
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Affiliation(s)
- Yashpal Singh Malik
- ICAR-Indian Veterinary Research Institute (ICAR-IVRI), Izatnagar, Uttar Pradesh India
| | - Raj Kumar Singh
- ICAR-Indian Veterinary Research Institute (ICAR-IVRI), Izatnagar, Uttar Pradesh India
| | - Mahendra Pal Yadav
- ICAR-Indian Veterinary Research Institute (ICAR-IVRI), Izatnagar, Uttar Pradesh, India, Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut, India
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Hannachi E, Bouratbine A, Mousli M. Enhancing the detection of Toxoplasma gondii via an anti-SAG1 scFv-alkaline phosphatase immunoconjugate. BIOTECHNOLOGY REPORTS (AMSTERDAM, NETHERLANDS) 2019; 23:e00360. [PMID: 31341791 PMCID: PMC6630058 DOI: 10.1016/j.btre.2019.e00360] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 06/29/2019] [Accepted: 06/30/2019] [Indexed: 12/11/2022]
Abstract
The purpose of this study was to implement a fluorometric method for enhancing the detection sensitivity of Toxoplasma gondii in biological fluids. To address this challenge, we designed and produced a recombinant immunoconjugate tool based on a single-chain antibody fragment anti-T. gondii SAG1 antigen (scFvSG15) genetically fused to the bacterial alkaline phosphatase (AP) using 4-methyl-umbelliferyl-phosphate as fluorogenic substrate. The anti-SAG1 scFv-AP conjugate was fully bifunctional and was used successfully in different assays including immunoblot, fluorometric ELISA and direct immunofluorescence. The fluorometric immunoassay afforded an extremely low detection limit (1 tachyzoite/well), which was in agreement with the real-time PCR control test. The immunofluorescence imaging has provided captivating visual evidence of T. gondii detection. These results strongly suggest that the recombinant anti-SAG1-AP conjugate generated here might serve as useful and highly sensitive immunoassay probe to direct detect T. gondii in a one-step procedure, opening up new perspectives for diagnosis of toxoplasmosis.
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Affiliation(s)
| | | | - Mohamed Mousli
- Laboratoire de Parasitologie Médicale, Biotechnologies et Biomolécules, LR11-IPT06, Institut Pasteur de Tunis, Université Tunis El-Manar, 13 Place Pasteur -BP74, 1002 Tunis-Belvédère, Tunisia
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Bonvin P, Venet S, Fontaine G, Ravn U, Gueneau F, Kosco-Vilbois M, Proudfoot AE, Fischer N. De novo isolation of antibodies with pH-dependent binding properties. MAbs 2015; 7:294-302. [PMID: 25608219 PMCID: PMC4623423 DOI: 10.1080/19420862.2015.1006993] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
pH-dependent antibodies are engineered to release their target at a slightly acidic pH, a property making them suitable for clinical as well as biotechnological applications. Such antibodies were previously obtained by histidine scanning of pre-existing antibodies, a labor-intensive strategy resulting in antibodies that displayed residual binding to their target at pH 6.0. We report here the de novo isolation of pH-dependent antibodies selected by phage display from libraries enriched in histidines. Strongly pH-dependent clones with various affinity profiles against CXCL10 were isolated by this method. Our best candidate has nanomolar affinity for CXCL10 at pH 7.2, but no residual binding was detected at pH 6.0. We therefore propose that this new process is an efficient strategy to generate pH-dependent antibodies.
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Key Words
- BLI, bio-layer interferometry
- CDR, complementary determining region
- CDRH, CDR of the heavy chain
- CDRL, CDR of the light chain
- ELISA, enzyme-linked immunosorbent assay
- GPCR, G protein-coupled receptor
- KB, kinetic buffer
- PBS, phosphate buffered saline
- SPR, surface plasmon resonance
- antibody recycling
- chemokine
- histidine
- mAb, monoclonal antibody
- monoclonal antibody
- pH-dependency
- phage display
- phage libraries
- scFv, single-chain variable fragment
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Functional knockout of FUT8 in Chinese hamster ovary cells using CRISPR/Cas9 to produce a defucosylated antibody. Eng Life Sci 2015. [DOI: 10.1002/elsc.201400218] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
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Dhama K, Kapoor S, Pawaiya RVS, Chakraborty S, Tiwari R, Verma AK. Ross River Virus (RRV) infection in horses and humans: a review. Pak J Biol Sci 2015; 17:768-79. [PMID: 26035950 DOI: 10.3923/pjbs.2014.768.779] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
A fascinating and important arbovirus is Ross River Virus (RRV) which is endemic and epizootic in nature in certain parts of the world. RRV is a member of the genus Alphavirus within the Semliki Forest complex of the family Togaviridae, which also includes the Getah virus. The virus is responsible for causing disease both in humans as well as horses. Mosquito species (Aedes camptorhynchus and Aedes vigilax; Culex annulirostris) are the most important vector for this virus. In places of low temperature as well as low rainfall or where there is lack of habitat of mosquito there is also limitation in the transmission of the virus. Such probability is higher especially in temperate regions bordering endemic regions having sub-tropical climate. There is involvement of articular as well as non-articular cells in the replication of RRV. Levels of pro-inflammatory factors viz., tumor necrosis factor-alpha (TNF-α); interferon-gamma (IFN-γ); and macrophage chemo-attractant protein-1 (MAC-1) during disease pathogenesis have been found to be reduced. Reverse transcription-polymerase chain reaction (RT-PCR) is the most advanced molecular diagnostic tool along with epitope-blocking enzyme-linked immunosorbent assay (ELISA) for detecting RRV infection. Treatment for RRV infection is only supportive. Vaccination is not a fruitful approach. Precise data collection will help the researchers to understand the RRV disease dynamics and thereby designing effective prevention and control strategy. Advances in diagnosis, vaccine development and emerging/novel therapeutic regimens need to be explored to their full potential to tackle RRV infection and the disease it causes.
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Dhama K, Singh SD, Barathidasan R, Desingu PA, Chakraborty S, Tiwari R, Kumar MA. Emergence of Avian Infectious Bronchitis Virus and its variants need better diagnosis, prevention and control strategies: a global perspective. Pak J Biol Sci 2015; 17:751-67. [PMID: 26035949 DOI: 10.3923/pjbs.2014.751.767] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Growth in poultry sector is being challenged due to increased incidence and re-emergence of diseases caused due to evolution of several viral pathogens and use of live vaccines. Piles of economic losses are encountered due to these diseases. Avian Infectious Bronchitis (IB), caused by Corona virus, is OIE-listed disease and characterized by respiratory, renal and urogenital involvements, causing high mortality. Economic losses are encountered due to loss of productive performance of both egg and meat-type chickens. Variant viruses evolve due to spontaneous mutations and recombinations, causing disease in vaccinated flocks of all ages. Serotyping and genotyping are the common methods of classification of IBV strains. The virus has 4 clusters, grouped into 7 serotypes and the most important strains are Massachusetts, Connecticut, Arkansas, Gray, Holte and Florida along with numerous others, distributed round the globe. Several conventional and molecular diagnostic methods have been described for the diagnosis of IB in chickens. 'All-in/all-out' operations of rearing along with good biosafety measures forms the basis of prevention, whereas vaccination forms the backbone of IB control programme. Both live and inactivated (oil emulsified) conventional vaccines are available. The new generation vaccines (recombinant and vector-based) developed against locally prevailing IBV strains may be more helpful and avoid the reversion of virulence in live vaccine viruses. The present review deals with all these perspectives of this important emerging poultry pathogen.
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Singh SV, Gupta S, Chaubey KK, Rawat KD, Kumar N, Sohal JS, Singh S, Tiwari R, Chakrabort S, Dhama K. Johne’s Disease (JD) in a
High Yielding Holstein Friesian Cattle Dairy Farm in India. ACTA ACUST UNITED AC 2014. [DOI: 10.3923/jbs.2014.195.203] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Kumar A, Singh S, Srivastava A, Gangwar N, Singh P, Gupta S, Chaubey K, Tiwari R, Chakrabort S, Dhama K. Comparative Evaluation of ‘Indigenous’ and Commercial Vaccines in Double Challenge Model for the Control of Caprine Paratuberculosis in India. ACTA ACUST UNITED AC 2014. [DOI: 10.3923/jbs.2014.169.182] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Dhama K, Pawaiya R, Chakrabort S, Tiwari R, Verma A. Toroviruses Affecting Animals and Humans: A Review. ACTA ACUST UNITED AC 2014. [DOI: 10.3923/ajava.2014.190.201] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Dhama K, Pawaiya R, Chakrabort S, Tiwari R, Verma A. Powassan virus (POWV) Infection in Animals and Humans: A Review. ACTA ACUST UNITED AC 2014. [DOI: 10.3923/ajava.2014.177.189] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Dhama K, Pawaiya R, Chakrabort S, Tiwari R, Saminathan M, Verma A. Coronavirus Infection in Equines: A Review. ACTA ACUST UNITED AC 2014. [DOI: 10.3923/ajava.2014.164.176] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Kumar Verm A, Dhama K, Chakrabort S, Kumar A, Tiwari R, Rahal A, . M, Vir Singh S. Strategies for Combating and Eradicating Important Infectious Diseases of Animals with Particular Reference to India: Present and Future Perspectives. ACTA ACUST UNITED AC 2014. [DOI: 10.3923/ajava.2014.77.106] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Dhama K, Pawaiya R, Karthik K, Chakrabort S, Tiwari R, Verma A. Equine encephalosis virus (EEV): A Review. ACTA ACUST UNITED AC 2014. [DOI: 10.3923/ajava.2014.123.133] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Verma AK, . MS, . N, . RT, . KD, . SVS. Glanders-A Re-emerging Zoonotic Disease: A Review. ACTA ACUST UNITED AC 2013. [DOI: 10.3923/jbs.2014.38.51] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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