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Fasogbon IV, Ondari EN, Deusdedit T, Rangasamy L, Krishnan S, Aja PM. Point-of-care potentials of lateral flow-based field screening for Mycoplasma bovis infections: a literature review. Biol Methods Protoc 2024; 9:bpae034. [PMID: 38835856 PMCID: PMC11147795 DOI: 10.1093/biomethods/bpae034] [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: 03/18/2024] [Revised: 05/09/2024] [Accepted: 05/17/2024] [Indexed: 06/06/2024] Open
Abstract
Point-of-care (POC) field screening for tools for Mycoplasma bovis (M. bovis) is still lacking due to the requirement for a simple, robust field-applicable test that does not entail specialized laboratory equipment. In accordance with the Preferred Reporting Items for Systematic Reviews and Meta-analysis (PRISMA) guidelines, this review identifies the methodologies that were retrieved based on our search strategy that have been reported for the diagnosis of m. bovis infection between 2014 and diagnostics. A search criterion was generated to curate 103 articles, which were reduced in number (to 46), following the screening guidelines of PRISMA. The 43 articles included in the study present 25 different assay methods. The assay methods were grouped as microbiological culture, serological assay, PCR-based assay, LAMP-based assay, NGS-based assay, or lateral flow assay. We, however, focus our discussion on the three lateral flow-based assays relative to others, highlighting the advantages they present above the other techniques and their potential applicability as a POC diagnostic test for M. bovis infections. We therefore call for further research on developing a lateral flow-based screening tool that could revolutionize the diagnosis of M. bovis infection.
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Affiliation(s)
- Ilemobayo V Fasogbon
- Department of Biochemistry, Kampala International University-Western Campus, Bushenyi 41201, Uganda
- Centre for Biomaterials, Cellular and Molecular Theranostics (CBCMT), Vellore Institute of Technology, Vellore 632014, India
| | - Erick N Ondari
- Department of Biological Sciences, School of Pure & Applied Sciences, Kisii University, Kisii 40200, Kenya
| | - Tusubira Deusdedit
- Department of Biochemistry, Mbarara University of Science and Technology, Mbarara 40301, Uganda
| | - Loganathan Rangasamy
- Centre for Biomaterials, Cellular and Molecular Theranostics (CBCMT), Vellore Institute of Technology, Vellore 632014, India
| | - Sasirekha Krishnan
- Centre for Biomaterials, Cellular and Molecular Theranostics (CBCMT), Vellore Institute of Technology, Vellore 632014, India
| | - Patrick M Aja
- Department of Biochemistry, Kampala International University-Western Campus, Bushenyi 41201, Uganda
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Sivakumar G, Gupta A, Babu A, Sasmal PK, Maji S. Nitrodopamine modified MnO 2 NS-MoS 2QDs hybrid nanocomposite for the extracellular and intracellular detection of glutathione. J Mater Chem B 2024; 12:4724-4735. [PMID: 38655674 DOI: 10.1039/d3tb03068g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
We have developed a highly sensitive and reliable fluorescence resonance energy transfer (FRET) probe using nitro-dopamine (ND) and dopamine (DA) coated MnO2 nanosheet (ND@MnO2 NS and DA@MnO2 NS) as an energy acceptor and MoS2 quantum dots (QDs) as an energy donor. By employing surface-modified MnO2 NS, we can effectively reduce the fluorescence intensity of MoS2 QDs through FRET. It can reduce MnO2 NS to Mn2+ and facilitate the fluorescence recovery of the MoS2 QDs. This ND@MnO2 NS@MoS2 QD-based nanoprobe demonstrates excellent sensitivity to GSH, achieving an LOD of 22.7 nM in an aqueous medium while exhibiting minimal cytotoxicity and good biocompatibility. Moreover, our sensing platform shows high selectivity to GSH towards various common biomolecules and electrolytes. Confocal fluorescence imaging revealed that the nanoprobe can image GSH in A549 cells. Interestingly, the ND@MnO2 NS nanoprobe demonstrates no cytotoxicity in living cancer cells, even at concentrations up to 100 μg mL-1. Moreover, the easy fabrication and eco-friendliness of ND@MnO2 NS make it a rapid and simple method for detecting GSH. We envision the developed nanoprobe as an incredible platform for real-time monitoring of GSH levels in both extracellular and intracellular mediums, proving valuable for biomedical research and clinical diagnostics.
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Affiliation(s)
- Gomathi Sivakumar
- Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology (SRMIST), Kattankulathur, Tamil Nadu-603203, India.
| | - Ajay Gupta
- School of Physical Sciences, Jawaharlal Nehru University, New Delhi-110067, India.
| | - Anashwara Babu
- Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology (SRMIST), Kattankulathur, Tamil Nadu-603203, India.
| | - Pijus K Sasmal
- School of Physical Sciences, Jawaharlal Nehru University, New Delhi-110067, India.
| | - Samarendra Maji
- Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology (SRMIST), Kattankulathur, Tamil Nadu-603203, India.
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Gelgie AE, Desai SE, Gelalcha BD, Kerro Dego O. Mycoplasma bovis mastitis in dairy cattle. Front Vet Sci 2024; 11:1322267. [PMID: 38515536 PMCID: PMC10956102 DOI: 10.3389/fvets.2024.1322267] [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: 10/16/2023] [Accepted: 02/21/2024] [Indexed: 03/23/2024] Open
Abstract
Mycoplasma bovis has recently been identified increasingly in dairy cows causing huge economic losses to the dairy industry. M. bovis is a causative agent for mastitis, pneumonia, endometritis, endocarditis, arthritis, otitis media, and many other clinical symptoms in cattle. However, some infected cows are asymptomatic or may not shed the pathogen for weeks to years. This characteristic of M. bovis, along with the lack of adequate testing and identification methods in many parts of the world until recently, has allowed the M. bovis to be largely undetected despite its increased prevalence in dairy farms. Due to growing levels of antimicrobial resistance among wild-type M. bovis isolates and lack of cell walls in mycoplasmas that enable them to be intrinsically resistant to beta-lactam antibiotics that are widely used in dairy farms, there is no effective treatment for M. bovis mastitis. Similarly, there is no commercially available effective vaccine for M. bovis mastitis. The major constraint to developing effective intervention tools is limited knowledge of the virulence factors and mechanisms of the pathogenesis of M. bovis mastitis. There is lack of quick and reliable diagnostic methods with high specificity and sensitivity for M. bovis. This review is a summary of the current state of knowledge of the virulence factors, pathogenesis, clinical manifestations, diagnosis, and control of M. bovis mastitis in dairy cows.
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Affiliation(s)
- Aga E. Gelgie
- Department of Animal Science, The University of Tennessee, Knoxville, TN, United States
| | - Sarah E. Desai
- College of Veterinary Medicine, The University of Tennessee, Knoxville, TN, United States
| | - Benti D. Gelalcha
- Department of Animal Science, The University of Tennessee, Knoxville, TN, United States
| | - Oudessa Kerro Dego
- Department of Animal Science, The University of Tennessee, Knoxville, TN, United States
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Bokma J, Kaske M, Vermijlen J, Stuyvaert S, Pardon B. Diagnostic performance of Mycoplasmopsis bovis antibody ELISA tests on bulk tank milk from dairy herds. BMC Vet Res 2024; 20:81. [PMID: 38443962 PMCID: PMC10916218 DOI: 10.1186/s12917-024-03927-x] [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: 08/17/2023] [Accepted: 02/09/2024] [Indexed: 03/07/2024] Open
Abstract
BACKGROUND Testing of bulk tank milk (BTM) for Mycoplasmopsis bovis (previously Mycoplasma bovis) antibodies is increasingly popular. However the performance of some commercially available tests is unknown, and cutoff values possibly need to be adjusted in light of the purpose. Therefore, the aim of this study was to compare the diagnostic performance of three commercially available M. bovis antibody ELISAs on BTM, and to explore optimal cutoff values for screening purposes. A prospective diagnostic test accuracy study was performed on 156 BTM samples from Belgian and Swiss dairy farms using Bayesian Latent Class Analysis. Samples were initially classified using manufacturer cutoff values, followed by generated values. RESULTS Following the manufacturer's guidelines, sensitivity of 91.4%, 25.6%, 69.2%, and specificity of 67.2%, 96.8%, 85.8% were observed for ID-screen, Bio K432, and Bio K302, respectively. Optimization of cutoffs resulted in a sensitivity of 89.0%, 82.0%, and 85.5%, and a specificity of 83.4%, 75.1%, 77.2%, respectively. CONCLUSIONS The ID-screen showed the highest diagnostic performance after optimization of cutoff values, and could be useful for screening. Both Bio-X tests may be of value for diagnostic or confirmation purposes due to their high specificity.
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Affiliation(s)
- Jade Bokma
- Department of Internal Medicine, Reproduction, and Population Medicine, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium.
| | - Martin Kaske
- Swiss Bovine Health Service, Zurich, Switzerland
| | | | - Sabrina Stuyvaert
- Department of Internal Medicine, Reproduction, and Population Medicine, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Bart Pardon
- Department of Internal Medicine, Reproduction, and Population Medicine, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
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Wang T, Jin S, Lv R, Meng Y, Li G, Han Y, Zhang Q. Development of an indirect ELISA for detection of the adaptive immune response of black carp (Mylopharyngodon piceus). J Immunol Methods 2023; 521:113550. [PMID: 37661050 DOI: 10.1016/j.jim.2023.113550] [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: 09/23/2022] [Revised: 07/02/2023] [Accepted: 08/24/2023] [Indexed: 09/05/2023]
Abstract
Black carp (Mylopharyngodon piceus) is an important fishery resource and the main breeding target in China. Due to the lack of an assay of immunoglobulin M (IgM) antibodies in black carp, there is no effective method to evaluate adaptive immune response, which limits immunological studies and vaccine development. The present study used mAbs (monoclonal antibodies) against serum IgM of grass carp as capture antibodies. The results of Western blot analysis indicated that these antibodies had strong affinity and specificity to IgM heavy chain in black carp serum and were used to detect the antibody titer, optimize the conditions, perform a sensitivity test, and develop an indirect ELISA (enzyme-linked immunosorbent assay) to detect specific IgM antibodies in the serum. This detection method has good specificity and is effective only for grass carp (Ctenopharyngodon idella) and black carp and not for crucian carp (Carassius aumtus), silver carp (Hypophthalmichthys molitrix), bighead carp (Hypophthalmichthys nobilis), mandarin fish (Siniperca chuatsi), black bream (Megalobrama skolkovii), or yellow catfish (Pseudobagrus fulvidraco). The lowest antigen detection level was 0.05 μg/ml. The error of experimental repetition in the same sample was 1.61-4.61%. The levels of specific IgM in black carp serum were steadily increased after immunization, peaked on day 28, and then slowly decreased. Indirect ELISA can be applied to detect the changes in specific antibodies in black carp serum. Moreover, indirect ELISA provides a convenient and reliable serological detection method for immunological research and evaluation of immune effects of a vaccine in black carp.
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Affiliation(s)
- Tongtong Wang
- School of Agriculture, Ludong University, Yantai, China
| | - Shanshan Jin
- School of Agriculture, Ludong University, Yantai, China
| | - Ruoxuan Lv
- School of Agriculture, Ludong University, Yantai, China
| | - Yuting Meng
- School of Agriculture, Ludong University, Yantai, China
| | - Guozhong Li
- School of Agriculture, Ludong University, Yantai, China
| | - Yuxing Han
- School of Agriculture, Ludong University, Yantai, China
| | - Qiusheng Zhang
- School of Agriculture, Ludong University, Yantai, China.
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Okella H, Tonooka K, Okello E. A Systematic Review of the Recent Techniques Commonly Used in the Diagnosis of Mycoplasma bovis in Dairy Cattle. Pathogens 2023; 12:1178. [PMID: 37764986 PMCID: PMC10535753 DOI: 10.3390/pathogens12091178] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Revised: 09/14/2023] [Accepted: 09/15/2023] [Indexed: 09/29/2023] Open
Abstract
Early detection of Mycoplasmal mastitis is greatly hampered by late seroconversion, slow growth of Mycoplasma organisms, intermittent shedding, and the high cost of diagnostic tests. To improve future diagnostic development, examining the available techniques is necessary. Accordingly, the present study systematically reviewed M. bovis diagnostic studies published between January 2000 and April 2023 utilizing the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) protocol. The protocol registration was performed according to the Open Science Framework (osf.io/ug79h), and the electronic search was conducted in the World Catalog, Mendeley, ProQuest, ScienceDirect, Semantic Scholar, PubMed, Google Scholar, Prime Scholar, and PubMed Central databases using a Boolean operator and inclusion and exclusion criteria. Of the 1194 pieces of literature retrieved, 67 studies were included. Four broad categories of up to 16 diagnostic approaches were reported: microbial culture, serological, DNA-based, and mass spectrometry. Overall, DNA-based techniques were the most published (48.0%), with recombinase polymerase amplification (RPA) and loop-mediated isothermal amplification (LAMP) as the most promising user-friendly, equipment-free techniques. On the other hand, mass spectrometry was reported as the least utilized (2.9%) given the high equipment cost. Though costly and laboratory-allied, DNA-based techniques, particularly PCRs, were reported as the most rapid and specific approach.
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Affiliation(s)
- Hedmon Okella
- Veterinary Medicine Teaching and Research Center, School of Veterinary Medicine, University of California Davis, Tulare, CA 93274, USA
| | - Karen Tonooka
- Veterinary Medicine Teaching and Research Center, School of Veterinary Medicine, University of California Davis, Tulare, CA 93274, USA
| | - Emmanuel Okello
- Veterinary Medicine Teaching and Research Center, School of Veterinary Medicine, University of California Davis, Tulare, CA 93274, USA
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California Davis, Davis, CA 95616, USA
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Veldhuis A, Aalberts M, Penterman P, Wever P, van Schaik G. Bayesian diagnostic test evaluation and true prevalence estimation of mycoplasma bovis in dairy herds. Prev Vet Med 2023; 216:105946. [PMID: 37235906 DOI: 10.1016/j.prevetmed.2023.105946] [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: 12/02/2022] [Revised: 05/11/2023] [Accepted: 05/17/2023] [Indexed: 05/28/2023]
Abstract
The true prevalence of dairy cattle herds with M. bovis infections in the Netherlands is unknown. Previous attempts to estimate prevalences were hampered by the absence of a diagnostic serological test that was validated under field conditions. This study estimated sensitivity and specificity of two commercial serum ELISAs and the true M. bovis herd prevalence using different Bayesian latent class models. A total of 7305 serum samples from 415 randomly chosen dairy herds were collected in fall/winter 2019 and investigated for presence of antibodies against M. bovis using the BIO-K-260 ELISA from Bio-X. Serum samples from 100 of these herds were also tested with a second ELISA, from IDvet. A Bayesian latent class model using the paired test results estimated a sensitivity of 14.1% (95% Bayesian probability interval (BPI): 11.6-16.7%) for the Bio-X ELISA and a specificity of 97.2% (95% BPI: 95.9-98.4%). Sensitivity and specificity for the IDvet ELISA were estimated at 92.5% (95% BPI: 88.3-96.5%) and 99.3% (95% BPI: 98.7-99.8%), respectively. Also, Bio-X ELISA sensitivity was considerably higher with data from calves only and with data from a selection of herds with a clinical outbreak, whereas the IDvet ELISA sensitivity was fairly constant under these conditions. These differences in test sensitivity is expected to be related to an effect of time since infection. A second Bayesian model, applied on test results of all 415 herds, estimated a true herd prevalence of 69.9% (95% BPI: 62.7-77.6%), suggesting M. bovis in endemic amongst dairy cattle herds in the Netherlands. To what extent seropositive herds have experienced a clinical outbreak needs further investigation.
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Affiliation(s)
| | | | | | - Paul Wever
- Royal GD, PO Box 9, 7400 AA Deventer, the Netherlands
| | - Gerdien van Schaik
- Royal GD, PO Box 9, 7400 AA Deventer, the Netherlands; Department of Population Health Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
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Xu QY, Pan Q, Wu Q, Xin JQ. Mycoplasma Bovis adhesins and their target proteins. Front Immunol 2022; 13:1016641. [PMID: 36341375 PMCID: PMC9630594 DOI: 10.3389/fimmu.2022.1016641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 10/06/2022] [Indexed: 11/13/2022] Open
Abstract
Bovine mycoplasmosis is an important infectious disease of cattle caused by Mycoplasma bovis (M. bovis) which poses a serious threat to the breeding industry. Adhesin is involved in the initial process of M. bovis colonization, which is closely related to the infection, cell invasion, immune escape and virulence of this pathogenic microorganism. For the reason that M. bovis lacks a cell wall, its adhesin is predominantly located on the surface of the cell membrane. The adhesins of M. bovis are usually identified by adhesion and adhesion inhibition analysis, and more than 10 adhesins have been identified so far. These adhesins primarily bind to plasminogen, fibronectin, heparin and amyloid precursor-like protein-2 of host cells. This review aims to concisely summarize the current knowledge regarding the adhesins of M. bovis and their target proteins of the host cell. Additionally, the biological characteristics of the adhesin will be briefly analyzed.
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Bokma J, Stuyvaert S, Pardon B. Comparison and optimisation of screening cutoff values for Mycoplasma bovis antibody ELISAs using serum from youngstock. Vet Rec 2022; 191:e2179. [PMID: 36065576 DOI: 10.1002/vetr.2179] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 08/03/2022] [Accepted: 08/18/2022] [Indexed: 11/06/2022]
Abstract
BACKGROUND Mycoplasma bovis-associated disease can cause tremendous production losses, welfare issues and high antimicrobial use. Therefore, screening cattle for M. bovis antibodies before entering the herd is a popular and possibly cost-efficient way to reduce disease introduction. However, interpretation of results can be challenging due to variable accuracy between tests and populations. This study's objectives were to compare the diagnostic test accuracy of three commercially available M. bovis antibody ELISAs (ID-screen, Bio K302 and Bio K432) and to explore optimal cutoff values for screening purposes. METHODS A prospective diagnostic test accuracy study was performed on 170 serum samples from youngstock using Bayesian latent class modelling. Samples were categorised using manufacturer and generated cutoff values. RESULTS Using the manufacturers' guidelines, ID-screen, Bio K432 and Bio K302 showed 97.6%, 67.4% and 33.6% sensitivity, and 78.8%, 97.6% and 99.1% specificity, respectively. Optimised cutoffs resulted in 94.8%, 82.6% and 78.3% sensitivity, and 94.2%, 92.5% and 79.4% specificity, respectively. CONCLUSIONS The highest diagnostic accuracy for detecting M. bovis antibodies was obtained by ID-screen (≥110%). However, by adjusting cutoff values, the sensitivity of Bio-X tests could be markedly increased, making these tests also applicable as screening tools. LIMITATIONS Interpretation needs to be careful as antibodies may be linked to both infectious and non-infectious status.
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Affiliation(s)
- Jade Bokma
- Department of Internal Medicine, Reproduction, and Population Medicine, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Sabrina Stuyvaert
- Department of Internal Medicine, Reproduction, and Population Medicine, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Bart Pardon
- Department of Internal Medicine, Reproduction, and Population Medicine, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
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Hurri E, Ohlson A, Lundberg Å, Aspán A, Pedersen K, Tråvén M. Herd-level prevalence of Mycoplasma bovis in Swedish dairy herds determined by antibody ELISA and PCR on bulk tank milk and herd characteristics associated with seropositivity. J Dairy Sci 2022; 105:7764-7772. [PMID: 35879164 DOI: 10.3168/jds.2021-21390] [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: 10/07/2021] [Accepted: 04/27/2022] [Indexed: 11/19/2022]
Abstract
Mycoplasma bovis is an important pathogen causing pneumonia, mastitis, and arthritis in cattle, leading to reduced animal welfare and economic losses worldwide. In this cross-sectional study, we investigated the prevalence of M. bovis in bulk tank milk (BTM) and herd characteristics associated with a positive antibody test result in Swedish dairy herds. Bulk tank milk samples from all Swedish dairy herds (n = 3,144) were collected and analyzed with ID Screen antibody ELISA and PCR. Information on herd characteristics was collected from the national Dairy Herd Improvement database. To identify herd characteristics associated with the presence of antibodies in BTM, logistic regression was used in 4 different models. The apparent herd-level prevalence of M. bovis infection based on antibodies in BTM was 4.8%, with large regional differences ranging from 0 to 20%. None of the BTM samples was positive by PCR. All the antibody-positive herds were situated in the south of Sweden. The logistic regression model showed that larger herds had higher odds of detectable antibodies in BTM (herd size >120 cows, odds ratio = 8.8). An association was also found between antibodies in BTM and both a higher late calf mortality (2-6 mo) and a higher young stock mortality (6-15 mo). This study showed a clear regional difference in the apparent prevalence of M. bovis infection based on antibodies. The relatively low prevalence of M. bovis in Sweden is a strong motivator for the cattle industry to take steps to prevent further spread of the infection. It is essential that the M. bovis status of free herds be known, and the regional differences shown in this study suggest that testing is highly recommended when live cattle from high-prevalence areas are being introduced into herds. We do not recommend using PCR on BTM to detect infected herds, owing to the low detection frequency in this study.
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Affiliation(s)
- E Hurri
- Department of Clinical Sciences, Swedish University of Agricultural Sciences, SE-750 07 Uppsala, Sweden; Department of Animal Health and Antimicrobial Strategies, National Veterinary Institute (SVA), SE-751 89 Uppsala, Sweden.
| | - A Ohlson
- Section of Animal Health, Växa Sverige, SE-101 24 Stockholm, Sweden
| | - Å Lundberg
- Section of Animal Health, Växa Sverige, SE-101 24 Stockholm, Sweden
| | - A Aspán
- Department of Animal Health and Antimicrobial Strategies, National Veterinary Institute (SVA), SE-751 89 Uppsala, Sweden
| | - K Pedersen
- Department of Animal Health and Antimicrobial Strategies, National Veterinary Institute (SVA), SE-751 89 Uppsala, Sweden
| | - M Tråvén
- Department of Clinical Sciences, Swedish University of Agricultural Sciences, SE-750 07 Uppsala, Sweden
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Prevalence of Mycoplasma bovis Infection in Calves and Dairy Cows in Western Australia. Vet Sci 2022; 9:vetsci9070351. [PMID: 35878368 PMCID: PMC9320095 DOI: 10.3390/vetsci9070351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Revised: 06/27/2022] [Accepted: 07/06/2022] [Indexed: 12/04/2022] Open
Abstract
Simple Summary Mycoplasma bovis is an emerging pathogen of economic and welfare concern for both adult and young cattle. A study was conducted to determine the prevalence of M. bovis in adult cows and calves in the southwest region of Western Australia. Nasal swabs and blood samples were collected from the animals and bulk tank milk samples were assessed for both seroprevalence and active infections of M. bovis infections in adult cows and calves. The study recorded a high seroprevalence of M. bovis in 699 apparently healthy adult lactating cows and 495 young calves on 29 dairy farms. The herd-level seroprevalence was also detected as being higher in both adult lactating cows and calves. No current active infections were recorded on the farms. The female calves and pure Holstein–Friesian animals were found to be twice as likely to be seropositive for M. bovis compared to male calves and the Holstein–Friesian crossbred calves. The high seroprevalence of M. bovis in both adult and young cattle in the southwest dairy farms of Western Australia warrants more effective farm biosecurity measures and further evaluation of the current prevention and management measures practiced on the farms. Abstract Mycoplasma bovis (M. bovis) can cause a multitude of diseases in cattle, with detrimental effects on the farm economy and the welfare of both adult and young cattle. The objective of this study was to determine the prevalence of M. bovis in adult cows and calves in the south-west region of Western Australia. A cross-sectional study was conducted on 29 dairy farms with 699 apparently healthy adult lactating cows and 495 young calves during 2019–2020. Nasal swabs and blood samples collected from the animals and bulk tank milk (BTM) samples were assessed for M. bovis-specific proteins and antibodies by using polymerase chain reaction (PCR) and Mycoplasma immunogenic lipase A- Enzyme-Linked Immune Sorbent Assay (MilA ELISA). A seroprevalence of 42.5% (95% CI: 38.9–46.2) and 61% (95% CI: 56.6–65.2) was found in adult lactating cows and calves, respectively. The herd-level seroprevalence of M. bovis ranged from 4% (95% CI: 07–19.5) to 92% (95% CI: 75.0–97.8) in adult lactating cows and 25% (95% CI: 10.2–49.5) to 87% (95% CI: 67.9–95.5) for calves in these farms. None of the BTM and nasal swab samples were positive for M. bovis, indicating an absence of any current active infections on the farms. The female calves and pure Holstein–Friesian animals are twice as likely to be seropositive for M. bovis compared to male calves (OR 2.4; 95% CI: 1.7–3.5) and Holstein–Friesian crossbred calves (OR 2.4; 95% CI: 1.7–3.5). The high seroprevalence in both adult and young cattle in the southwest dairy farms of Western Australia warrants more effective farm biosecurity measures and further evaluation of the current prevention and management measures practiced on the farms.
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Farzaneh M, Derakhshandeh A, Al-Farha AABA, Petrovski K, Hemmatzadeh F. A novel phage-displayed MilA ELISA for detection of antibodies against Myc. bovis in bovine milk. J Appl Microbiol 2022; 133:1496-1505. [PMID: 35686656 PMCID: PMC9545076 DOI: 10.1111/jam.15655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 05/29/2022] [Accepted: 06/04/2022] [Indexed: 12/01/2022]
Abstract
AIMS The aim of this study was to assess a phage-displayed MilA protein of Myc. bovis in an indirect ELISA for the detection of Myc. bovis antibodies in milk samples. METHODS AND RESULTS The desired sequence of milA gene was synthesized and cloned into pCANTAB-F12 phagemid vector. The expression of the MilA on the phage surface was confirmed by Western blotting. The recombinant phage was used in the development of an indirect ELISA to detect Myc. bovis antibodies in milk samples. There was a significant agreement between the results of phage-based ELISA and recombinant GST-MilA ELISA for the detection of Myc. bovis antibodies in milk samples. CONCLUSIONS The inexpensive and convenient phage-based ELISA can be used instead of recombinant protein/peptide ELISA as an initial screening of Myc. bovis-associated mastitis. SIGNIFICANCE AND IMPACT OF STUDY Mastitis associated with Myc. bovis is a continuous and serious problem in the dairy industry. Sero-monitoring of Myc. bovis infection cases are one of the key factors for surveillance of the infections in dairy farms. Despite the existence of some commercially serological assays for Myc. bovis antibodies, they have some limitations regarding their sensitivity and availability. The development of accurate diagnosis tools could contribute to control programmes of Myc. bovis-associated mastitis in the dairy herds.
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Affiliation(s)
- Mina Farzaneh
- Department of Pathobiology, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | - Abdollah Derakhshandeh
- Department of Pathobiology, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | - Abd Al-Bar Ahmed Al-Farha
- Department of Animal Production, Technical Agricultural College, Northern Technical University, Mosul, Iraq
| | - Kiro Petrovski
- Australian Centre for Antimicrobial Resistance Ecology, The University of Adelaide, School of Animal and Veterinary Sciences, South Australia, Australia.,Davies Research Centre, School of Animal and Veterinary Sciences, The University of Adelaide, Adelaide, Australia
| | - Farhid Hemmatzadeh
- Davies Research Centre, School of Animal and Veterinary Sciences, The University of Adelaide, Adelaide, Australia.,School of Animal and Veterinary Sciences, The University of Adelaide, Adelaide, Australia
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13
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Santos-Junior MN, Neves WS, Santos RS, Almeida PP, Fernandes JM, Guimarães BCDB, Barbosa MS, da Silva LSC, Gomes CP, Sampaio BA, Rezende IDS, Correia TML, Neres NSDM, Campos GB, Bastos BL, Timenetsky J, Marques LM. Heterologous Expression, Purification, and Immunomodulatory Effects of Recombinant Lipoprotein GUDIV-103 Isolated from Ureaplasma diversum. Microorganisms 2022; 10:microorganisms10051032. [PMID: 35630474 PMCID: PMC9147684 DOI: 10.3390/microorganisms10051032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 05/05/2022] [Accepted: 05/07/2022] [Indexed: 02/06/2023] Open
Abstract
Ureaplasma diversum is a bacterial pathogen that infects cattle and can cause severe inflammation of the genital and reproductive systems. Lipid-associated membrane proteins (LAMPs), including GUDIV-103, are the main virulence factors in this bacterium. In this study, we heterologously expressed recombinant GUDIV-103 (rGUDIV-103) in Escherichia coli, purified it, and evaluated its immunological reactivity and immunomodulatory effects in bovine peripheral blood mononuclear cells (PBMCs). Samples from rabbits inoculated with purified rGUDIV-103 were analysed using indirect enzyme-linked immunosorbent assay and dot blotting to confirm polyclonal antibody production and assess kinetics, respectively. The expression of this lipoprotein in field isolates was confirmed via Western blotting with anti-rGUDIV-103 serum and hydrophobic or hydrophilic proteins from 42 U. diversum strains. Moreover, the antibodies produced against the U. diversum ATCC 49783 strain recognised rGUDIV-103. The mitogenic potential of rGUDIV-103 was evaluated using a lymphoproliferation assay in 5(6)-carboxyfluorescein diacetate succinimidyl ester−labelled bovine PBMCs, where it induced lymphocyte proliferation. Quantitative polymerase chain reaction analysis revealed that the expression of interleukin-1β, toll-like receptor (TLR)-α, TLR2, TLR4, inducible nitric oxide synthase, and caspase-3−encoding genes increased more in rGUDIV-103−treated PBMCs than in untreated cells (p < 0.05). Treating PBMCs with rGUDIV-103 increased nitric oxide and hydrogen peroxide levels. The antigenic and immunogenic properties of rGUDIV-103 suggested its suitability for immunobiological application.
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Affiliation(s)
- Manoel Neres Santos-Junior
- Department of Biointeraction, Multidisciplinary Institute of Health, Federal University of Bahia, Vitória da Conquista 40170-110, Brazil; (M.N.S.-J.); (W.S.N.); (R.S.S.); (J.M.F.); (T.M.L.C.); (N.S.d.M.N.)
- Department of Biology, and Biotechnology of Microorganisms, State University of Santa Cruz (UESC), Ilhéus 45662-900, Brazil; (B.C.d.B.G.); (L.S.C.d.S.); (C.P.G.); (B.A.S.); (G.B.C.); (B.L.B.)
| | - Wanderson Souza Neves
- Department of Biointeraction, Multidisciplinary Institute of Health, Federal University of Bahia, Vitória da Conquista 40170-110, Brazil; (M.N.S.-J.); (W.S.N.); (R.S.S.); (J.M.F.); (T.M.L.C.); (N.S.d.M.N.)
| | - Ronaldo Silva Santos
- Department of Biointeraction, Multidisciplinary Institute of Health, Federal University of Bahia, Vitória da Conquista 40170-110, Brazil; (M.N.S.-J.); (W.S.N.); (R.S.S.); (J.M.F.); (T.M.L.C.); (N.S.d.M.N.)
| | - Palloma Porto Almeida
- Bioinformatics and Computational Biology Lab, Division of Experimental and Translational Research, Brazilian National Cancer Institute (INCA), Rio de Janeiro 20231-050, Brazil;
| | - Janaina Marinho Fernandes
- Department of Biointeraction, Multidisciplinary Institute of Health, Federal University of Bahia, Vitória da Conquista 40170-110, Brazil; (M.N.S.-J.); (W.S.N.); (R.S.S.); (J.M.F.); (T.M.L.C.); (N.S.d.M.N.)
| | - Bruna Carolina de Brito Guimarães
- Department of Biology, and Biotechnology of Microorganisms, State University of Santa Cruz (UESC), Ilhéus 45662-900, Brazil; (B.C.d.B.G.); (L.S.C.d.S.); (C.P.G.); (B.A.S.); (G.B.C.); (B.L.B.)
| | - Maysa Santos Barbosa
- Department of Microbiology, Institute of Biomedical Science, University of São Paulo, São Paulo 05508-000, Brazil; (M.S.B.); (I.d.S.R.); (J.T.)
| | - Lucas Santana Coelho da Silva
- Department of Biology, and Biotechnology of Microorganisms, State University of Santa Cruz (UESC), Ilhéus 45662-900, Brazil; (B.C.d.B.G.); (L.S.C.d.S.); (C.P.G.); (B.A.S.); (G.B.C.); (B.L.B.)
| | - Camila Pacheco Gomes
- Department of Biology, and Biotechnology of Microorganisms, State University of Santa Cruz (UESC), Ilhéus 45662-900, Brazil; (B.C.d.B.G.); (L.S.C.d.S.); (C.P.G.); (B.A.S.); (G.B.C.); (B.L.B.)
| | - Beatriz Almeida Sampaio
- Department of Biology, and Biotechnology of Microorganisms, State University of Santa Cruz (UESC), Ilhéus 45662-900, Brazil; (B.C.d.B.G.); (L.S.C.d.S.); (C.P.G.); (B.A.S.); (G.B.C.); (B.L.B.)
| | - Izadora de Souza Rezende
- Department of Microbiology, Institute of Biomedical Science, University of São Paulo, São Paulo 05508-000, Brazil; (M.S.B.); (I.d.S.R.); (J.T.)
| | - Thiago Macedo Lopes Correia
- Department of Biointeraction, Multidisciplinary Institute of Health, Federal University of Bahia, Vitória da Conquista 40170-110, Brazil; (M.N.S.-J.); (W.S.N.); (R.S.S.); (J.M.F.); (T.M.L.C.); (N.S.d.M.N.)
| | - Nayara Silva de Macedo Neres
- Department of Biointeraction, Multidisciplinary Institute of Health, Federal University of Bahia, Vitória da Conquista 40170-110, Brazil; (M.N.S.-J.); (W.S.N.); (R.S.S.); (J.M.F.); (T.M.L.C.); (N.S.d.M.N.)
| | - Guilherme Barreto Campos
- Department of Biology, and Biotechnology of Microorganisms, State University of Santa Cruz (UESC), Ilhéus 45662-900, Brazil; (B.C.d.B.G.); (L.S.C.d.S.); (C.P.G.); (B.A.S.); (G.B.C.); (B.L.B.)
| | - Bruno Lopes Bastos
- Department of Biology, and Biotechnology of Microorganisms, State University of Santa Cruz (UESC), Ilhéus 45662-900, Brazil; (B.C.d.B.G.); (L.S.C.d.S.); (C.P.G.); (B.A.S.); (G.B.C.); (B.L.B.)
| | - Jorge Timenetsky
- Department of Microbiology, Institute of Biomedical Science, University of São Paulo, São Paulo 05508-000, Brazil; (M.S.B.); (I.d.S.R.); (J.T.)
| | - Lucas Miranda Marques
- Department of Biointeraction, Multidisciplinary Institute of Health, Federal University of Bahia, Vitória da Conquista 40170-110, Brazil; (M.N.S.-J.); (W.S.N.); (R.S.S.); (J.M.F.); (T.M.L.C.); (N.S.d.M.N.)
- Department of Biology, and Biotechnology of Microorganisms, State University of Santa Cruz (UESC), Ilhéus 45662-900, Brazil; (B.C.d.B.G.); (L.S.C.d.S.); (C.P.G.); (B.A.S.); (G.B.C.); (B.L.B.)
- Department of Microbiology, Institute of Biomedical Science, University of São Paulo, São Paulo 05508-000, Brazil; (M.S.B.); (I.d.S.R.); (J.T.)
- Correspondence:
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14
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Holzhauer M, Penterman PM, van Engelen E, Smits D, Velthuis AGJ. Dynamics of Mycoplasma bovis in Dutch dairy herds during acute clinical outbreaks. Vet J 2022; 283-284:105841. [PMID: 35561957 DOI: 10.1016/j.tvjl.2022.105841] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 04/30/2022] [Accepted: 04/30/2022] [Indexed: 11/29/2022]
Abstract
Mycoplasma bovis (M. bovis) can cause serious illness in cattle, presenting as arthritis and mastitis in dairy cows and pneumonia, arthritis and otitis media in calves. This study aimed to provide insight into the dynamics of M. bovis within dairy herds, experiencing an acute outbreak in dairy cows. Twenty farms were followed with laboratory testing of suspected dairy cows. Each outbreak farm was sampled five times, at 2 - 3 week intervals, sampling blood and milk and conjunctival fluid from clinically suspected dairy cows and healthy animals from three different age groups: dairy cows, young stock (7 - 24 months) and calves (1 - 6 months). Additionally, bulk tank milk was sampled every visit and environmental samples were taken on the first and last visits. The presence of M. bovis was tested by evaluating antibody titres in blood, bacterial DNA in conjunctival fluid and environmental samples and viable bacteria in milk samples. All data were analysed using logistic regression models, corrected for repeated sampling and within-herd correlation. Sixty percent (12/20) of the herds showed a combination of arthritis and mastitis, while other herds experienced only clinically mastitis (3/20) or arthritis (5/20). From the time an outbreak was confirmed, M. bovis infection was not only present in dairy cows, but also in young stock and calves (80% of the farms). Laboratory tests also confirmed the presence of M. bovis in healthy animals. The M. bovis PCR levels of calves and young stock were highly correlated at all visits (rtotal = 0.81, P < 0.01). Furthermore, M. bovis was present in the environment of the animals. At the end of the 3-month study period, none of the 20 clinical outbreak farms were M. bovis-'negative', based on laboratory testing, although hardly any clinical cases were observed at that time.
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Affiliation(s)
- M Holzhauer
- Department of Ruminant Health, GD Animal Health, PO Box 9, 7400 AA Deventer, the Netherlands
| | - P M Penterman
- Department of Ruminant Health, GD Animal Health, PO Box 9, 7400 AA Deventer, the Netherlands.
| | - E van Engelen
- Department of Research and Development, GD Animal Health, PO Box 9, 7400 AA Deventer, the Netherlands
| | - D Smits
- Department of Ruminant Health, GD Animal Health, PO Box 9, 7400 AA Deventer, the Netherlands
| | - A G J Velthuis
- Chief of the Department Bacteriology, Host-Pathogen Interaction & Diagnostic Development, PO Box 65, 8200AB Lelystad, the Netherlands
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15
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Salgadu A, Firestone SM, Watt A, Thilakarathne DS, Condello AK, Siu D, Masukagami Y, Tivendale KA, Stevenson MA, Mansell PD, Browning GF, Wawegama NK. Evaluation of the MilA ELISA for the diagnosis of herd infection with Mycoplasma bovis using bulk tank milk and estimation of the prevalence of M. bovis in Australia. Vet Microbiol 2022; 270:109454. [DOI: 10.1016/j.vetmic.2022.109454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 04/25/2022] [Accepted: 05/09/2022] [Indexed: 11/17/2022]
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16
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Gaurivaud P, Tardy F. The Mycoplasma spp. ‘Releasome’: A New Concept for a Long-Known Phenomenon. Front Microbiol 2022; 13:853440. [PMID: 35495700 PMCID: PMC9051441 DOI: 10.3389/fmicb.2022.853440] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 03/14/2022] [Indexed: 11/13/2022] Open
Abstract
The bacterial secretome comprises polypeptides expressed at the cell surface or released into the extracellular environment as well as the corresponding secretion machineries. Despite their reduced coding capacities, Mycoplasma spp. are able to produce and release several components into their environment, including polypeptides, exopolysaccharides and extracellular vesicles. Technical difficulties in purifying these elements from the complex broth media used to grow mycoplasmas have recently been overcome by optimizing growth conditions and switching to chemically defined culture media. However, the secretion pathways responsible for the release of these structurally varied elements are still poorly described in mycoplasmas. We propose the use of the term ‘releasome,’ instead of secretome, to refer to molecules released by mycoplasmas into their environment. The aim of this review is to more precisely delineate the elements that should be considered part of the mycoplasmal releasome and their role in the interplay of mycoplasmas with host cells and tissues.
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17
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Malmuthuge N, Howell A, Arsic N, Prysliak T, Perez-Casal J, Griebel P. Effect of maternal separation and transportation stress on the bovine upper respiratory tract microbiome and the immune response to resident opportunistic pathogens. Anim Microbiome 2021; 3:62. [PMID: 34538279 PMCID: PMC8451078 DOI: 10.1186/s42523-021-00123-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Accepted: 08/27/2021] [Indexed: 01/22/2023] Open
Abstract
Background The bovine upper respiratory tract (URT) microbiome includes opportunistic pathogens that cause respiratory disease and stress associated with maternal separation and transportation contributes to the severity of this respiratory disease. Stress is known to alter the gut microbiome but little is known regarding the effect of stress on the URT microbiota. This study used six-month old suckling beef calves to investigate whether maternal separation (weaned), by itself or combined with transportation (weaned + transport), altered the URT microbiome and host immune responses to resident opportunistic pathogens. Results Taxonomic and functional composition of the URT microbiome in suckling and weaned beef calves did not change significantly when serially sampled over a one-month period. Subtle temporal changes in the URT microbiome composition were observed in weaned + transport calves. Total bacterial density was lower (p < 0.05) on day 4 post-weaning in both the weaned and weaned + transport groups when compared to suckling calves. In addition, significant (p < 0.05) temporal changes in the density of the opportunistic pathogens, M. haemolytica and P. multocida, were observed independent of treatment but these changes did not correlate with significantly increased (p < 0.05) serum antibody responses to both of these bacteria in the weaned and weaned + transport groups. Serum antibody responses to My. bovis, another opportunistic pathogen, remained unchanged in all treatment groups. Weaning, by itself and in combination with transportation, also had significant (p < 0.05) short- (2 to 8 days post-weaning) and long-term (28 days post-weaning) effects on the expression of adrenergic receptor genes in blood leukocytes when compared to age-matched suckling beef calves. Conclusions Maternal separation (weaning) and transportation has minor effects on the taxonomic and functional composition of the URT microbiome and temporal changes in the density of opportunistic pathogen residing in the URT did not correlate with significant changes in immune responses to these bacteria. Significant changes in adrenergic receptor expression in blood leukocytes following weaning, with or without transportation, suggests altered neuroimmune regulation should be further investigated as a mechanism by which stress can alter host-microbiome interactions for some opportunistic respiratory pathogens that reside in the URT. Supplementary Information The online version contains supplementary material available at 10.1186/s42523-021-00123-2.
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Affiliation(s)
- Nilusha Malmuthuge
- Vaccine & Infectious Disease Organization - International Vaccine Centre (VIDO-InterVac), University of Saskatchewan, Saskatoon, SK, Canada.,Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, 5403 1 Ave S, Lethbridge, AB, T1J 4B1, Canada
| | - Angela Howell
- Vaccine & Infectious Disease Organization - International Vaccine Centre (VIDO-InterVac), University of Saskatchewan, Saskatoon, SK, Canada
| | - Natasa Arsic
- Vaccine & Infectious Disease Organization - International Vaccine Centre (VIDO-InterVac), University of Saskatchewan, Saskatoon, SK, Canada
| | - Tracy Prysliak
- Vaccine & Infectious Disease Organization - International Vaccine Centre (VIDO-InterVac), University of Saskatchewan, Saskatoon, SK, Canada
| | - Jose Perez-Casal
- Vaccine & Infectious Disease Organization - International Vaccine Centre (VIDO-InterVac), University of Saskatchewan, Saskatoon, SK, Canada
| | - Philip Griebel
- Vaccine & Infectious Disease Organization - International Vaccine Centre (VIDO-InterVac), University of Saskatchewan, Saskatoon, SK, Canada. .,School of Public Health, University of Saskatchewan, Saskatoon, SK, Canada.
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18
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He M, Shang N, Zheng B, Yue G. An ultrasensitive colorimetric and fluorescence dual-readout assay for glutathione with a carbon dot-MnO 2 nanosheet platform based on the inner filter effect. RSC Adv 2021; 11:21137-21144. [PMID: 35479353 PMCID: PMC9034092 DOI: 10.1039/d1ra02411f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 06/02/2021] [Indexed: 01/03/2023] Open
Abstract
An ultrasensitive colorimetric and fluorescence dual-readout assay based on the inner filter effect (IFE) was developed for glutathione (GSH) determination, in which carbon dots (C-dots) were used as a fluorophore and MnO2 nanosheets as an absorber. Due to the excellent optical absorption properties of MnO2 nanosheets and the good spectral overlap between the fluorophore and absorber, MnO2 nanosheets could effectively quench the fluorescence of C-dots via the IFE. As the target, GSH could reduce MnO2 nanosheets to Mn2+ ions, which inhibited the IFE and resulted in the fading of solution color and the recovery of the fluorescence signal. And these two kinds of signals were respectively used for qualitative and quantitative detection of GSH. The results showed that this proposed assay could distinguish 10 μM GSH with the naked eye and quantitatively detect GSH within the concentration range of 0.1–400 μM. The limit of detection was 6.6 nM. Moreover, this assay showed sensitive responses in human serum and urine samples, which indicated that this IFE-based assay has great potential in GSH-related clinical and bioanalytical applications. An ultrasensitive colorimetric and fluorescence dual-readout assay based on carbon dot–MnO2 nanosheets platform was developed for GSH detection in human body fluid samples.![]()
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Affiliation(s)
- Mengyuan He
- College of Chemistry and Chemical Engineering, Xinyang Normal University Xinyang 464000 China
| | - Ning Shang
- College of Chemistry and Chemical Engineering, Xinyang Normal University Xinyang 464000 China
| | - Bo Zheng
- College of Chemistry and Chemical Engineering, Xinyang Normal University Xinyang 464000 China
| | - Gege Yue
- College of Chemistry and Chemical Engineering, Xinyang Normal University Xinyang 464000 China
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19
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Zhang G, Xiang M, Kong RM, Qu F. Fluorescent and colorimetric determination of glutathione based on the inner filter effect between silica nanoparticle-gold nanocluster nanocomposites and oxidized 3,3',5,5'-tetramethylbenzidine. Analyst 2021; 145:6254-6261. [PMID: 32985630 DOI: 10.1039/d0an01392g] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Determination of glutathione (GSH) is closely related to the clinical diagnosis of many diseases. Thus, a fluorescent and colorimetric dual-readout strategy for the sensitive determination of glutathione was proposed. The mesoporous silica nanoparticle-gold nanocluster (MSN-AuNC) nanocomposites with significantly enhanced emission and effectively improved photostability characteristics were used as fluorescent probes. Based on the inner filter effect (IFE), the fluorescence of MSN-AuNCs at 570 nm can be effectively quenched by oxidized 3,3',5,5'-tetramethylbenzidine (oxTMB) with absorption in the wavelength ranges of 330-470 nm and 500-750 nm. However, the addition of GSH could cause the reduction of blue oxTMB to colorless TMB, resulting in the inhibition of IFE and the recovery of the fluorescence of MSN-AuNCs. Therefore, using oxTMB as both quencher and color indicator, a dual-readout oxTMB/MSN-AuNC sensing system for the sensitive determination of GSH was constructed. As signal amplification is caused by the fluorescence enhancement of MSN-AuNCs, the detection limits as low as 0.12 μM and 0.34 μM can be obtained for fluorescent and colorimetric assay, respectively. This method may not only offer a new idea for the sensitive and effective determination of GSH, but also broaden the applications of AuNCs in fluorescent and colorimetric dual-readout bioanalysis.
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Affiliation(s)
- Guoyan Zhang
- Key Laboratory of Life-Organic Analysis of Shandong Province, Qufu Normal University, Qufu 273165, China.
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20
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Pires D, Morais A, Cunha N, Machado L, Barbosa L, Mendonça J, Balaro M, Santos J, Souza G, Barreto M, Nascimento E. Proposal of an iELISA for Mycoplasma bovis diagnosis in dairy cattle and associated risk factors. ARQ BRAS MED VET ZOO 2021. [DOI: 10.1590/1678-4162-12140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
ABSTRACT Mycoplasma bovis is a highly contagious agent associated with several pathologies in cattle. The detection of reactive antibodies to M. bovis by Indirect Enzyme-Linked Immunosorbent Assay (iELISA) identifies if there was an exposure to the microorganism. The current study aimed to optimize an iELISA from M. bovis total cell antigen, applying it to bovine serum samples, and to evaluate risk factors. Serum samples were obtained from 400 cows from 17 herds from Southeast Brazil. In the optimization of iELISA, the following was established: 2 μg/mL of antigen, sera dilution 1:300, and conjugate dilution 1:15000. The frequency was 62.3% (249/400) of reactive animals and 100% (17/17) of reactive herds. Risk factors were: herds with more than 100 animals (OR= 3.1; CI= 95%); Holstein breed (OR= 72.5; CI= 95%); cows (OR= 29.7; CI= 95%); intensive breeding system (OR= 3.3; CI= 95%); associated small ruminant production (OR= 4.4; CI= 95%); milk production above 500L (OR= 2.9; CI= 95%); no quarantine (OR= 1.5; CI= 95%); mechanical milking (OR= 5.5; CI= 95%) and cases of mastitis (OR= 5.5; CI= 95%). The proposed iELISA was able to detect antibodies reactive to M. bovis in bovine serum. Knowledge of these risk factors can assist in the implementation of prophylactic measures.
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Affiliation(s)
| | | | | | | | | | | | | | | | - G.N. Souza
- Universidade Federal Fluminense, Brazil; Empresa Brasileira de Pesquisa Agropecuária, Brazil
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21
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Li S, Liu H, Zhang X, Cai J, Huang K, Chen B, Huang L, Lin Z, Lin X, Yao H. Label-free colorimetric detection of glutathione by autocatalytic oxidation of o-phenylenediamine based on Au 3+ regulation and its application. NEW J CHEM 2021. [DOI: 10.1039/d1nj00370d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A label-free, rapid, and highly sensitive colorimetric assay for the detection of glutathione (GSH) was developed.
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22
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Mycoplasma bovis mbfN Encodes a Novel LRR Lipoprotein That Undergoes Proteolytic Processing and Binds Host Extracellular Matrix Components. J Bacteriol 2020; 203:JB.00154-20. [PMID: 33077633 DOI: 10.1128/jb.00154-20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Accepted: 10/13/2020] [Indexed: 01/04/2023] Open
Abstract
Mycoplasma bovis causes serious infections in ruminants, leading to huge economic losses. Lipoproteins are key components of the mycoplasma membrane and are believed to function in nutrient acquisition, adherence, enzymatic interactions with the host, and induction of the host's immune response to infection. Many genes of M. bovis have not been assigned functions, in part because of their low sequence similarity with other bacteria, making it difficult to extrapolate gene functions. This study examined functions of a surface-localized leucine-rich repeat (LRR) lipoprotein encoded by mbfN of M. bovis PG45. Homologs of MbfN were detected as 48-kDa peptides by Western blotting in all the strains of M. bovis included in this study, with the predicted 70-kDa full-length polypeptide detected in some strains. Sequence analysis of the gene revealed the absence in some strains of a region encoding the carboxyl-terminal 147 amino acids found in strain PG45, which could account for the variation detected by immunoblotting. In silico analysis of MbfN suggested that it may have an adhesion-related function. In vitro binding assays confirmed MbfN to be a fibronectin and heparin-binding protein. Disruption of mbfN in M. bovis PG45 significantly reduced (P = 0.033) the adherence of M. bovis PG45 to MDBK cells in vitro, demonstrating the role of MbfN as an adhesin.IMPORTANCE Experimental validation of the putative functions of genes in M. bovis will advance our understanding of the basic biology of this economically important pathogen and is crucial in developing prevention strategies. This study demonstrated the extracellular matrix binding ability of a novel immunogenic lipoprotein of M. bovis, and the role of this protein in adhesion by M. bovis suggests that it could play a role in virulence.
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23
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Zhang H, Deng X, Cui B, Shao Z, Zhao X, Yang Q, Song S, Wang Z, Wang Y, Wang Y, Liu Z, Sheng J, Chen C. Abortion and various associated risk factors in dairy cow and sheep in Ili, China. PLoS One 2020; 15:e0232568. [PMID: 33125372 PMCID: PMC7598486 DOI: 10.1371/journal.pone.0232568] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 07/23/2020] [Indexed: 12/12/2022] Open
Abstract
We studied livestock abortion and various associated risk factors in the Ili region of northwest China. Livestock abortion prevalence was estimated and correlated with infections (Brucellosis, Salmonellosis, Mycoplasma and Chlamydia seropositivity) and management (farming type and contact with other herds/flocks) risk factors. A total of 2996 serum samples (1406 cow, 1590 sheep) were identified by RBPT (Rose Bengal Plate Test) and c-ELISA (competitive-enzyme linked immunosorbent assay), and they showed the overall seroprevalence of brucellosis in the study area was cow 6.76%, sheep 9.50%. The seroprevalence of brucellosis in X county was cow 7.06%, sheep 9.12%; in H county was cow 11.70%, sheep 10.80%; and in Q county was cow 4.22%, sheep 9.11%. The overall seroprevalence of Mycoplasma in the study area was cow 3.20%, sheep 6.42%. The seroprevalence of Mycoplasma in X county was cow 3.39%, sheep 7.98%; in H county was cow 5.26%, sheep 9.97%; and in Q county was cow 2.11%, sheep 4.33%. The Odds ratio of brucellosis for cow and sheep, respectively, were 45.909 [95% CI 26.912-78.317, P<0.001] and 70.507 [95% CI 43.783-113.544, P<0.001] times higher than other abortion-related factors including mixed farming, contact with other flocks and Mycoplasma infection. A total of 54 samples, including aborted cow (22), sheep (30) fetuses and milk samples (2), were identified as Brucella melitensis (B. melitensis) positive. A total of 38 Brucella were isolated from 16 aborted cow, 20 sheep fetuses and 2 milk samples. All of these isolates were identified, and confirmed, as B. melitensis. A phylogenetic tree showed that the Brucella isolates closely matched the B. melitensis biovar 3 isolated in Inner Mongolia, China, and B. melitensis isolated from Norway and India. These results suggest that B. melitensis biovar 3 is the main pathogen responsible for cow and sheep abortion and also pose a human health risk. Additionally, livestock reproduction can also be influenced by Mycoplasma infection and managerial factors (farming type and contact with other herds/flocks), especially in remote areas.
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Affiliation(s)
- Huan Zhang
- School of Animal Science and Technology, Shihezi University, Shihezi City, Xinjiang, China
| | - Xiaoyu Deng
- School of Animal Science and Technology, Shihezi University, Shihezi City, Xinjiang, China
| | - Buyun Cui
- State Key Laboratory for Infectious Disease Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Prevention and Control, Beijing, China
| | - Zhiran Shao
- School of Animal Science and Technology, Shihezi University, Shihezi City, Xinjiang, China
| | - Xiaoli Zhao
- School of Animal Science and Technology, Shihezi University, Shihezi City, Xinjiang, China
| | - Qin Yang
- School of Animal Science and Technology, Shihezi University, Shihezi City, Xinjiang, China
| | - Shengnan Song
- School of Animal Science and Technology, Shihezi University, Shihezi City, Xinjiang, China
| | - Zhen Wang
- School of Animal Science and Technology, Shihezi University, Shihezi City, Xinjiang, China
| | - Yong Wang
- School of Animal Science and Technology, Shihezi University, Shihezi City, Xinjiang, China
| | - Yuanzhi Wang
- School of Medicine, Shihezi University, Shihezi City, Xinjiang, China
| | - Zhengfei Liu
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan City, China
| | - Jinliang Sheng
- School of Animal Science and Technology, Shihezi University, Shihezi City, Xinjiang, China
| | - Chuangfu Chen
- School of Animal Science and Technology, Shihezi University, Shihezi City, Xinjiang, China
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Development and application of a colloidal carbon test strip for the detection of antibodies against Mycoplasma bovis. World J Microbiol Biotechnol 2020; 36:157. [PMID: 32964289 PMCID: PMC7508640 DOI: 10.1007/s11274-020-02930-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Accepted: 09/14/2020] [Indexed: 01/07/2023]
Abstract
Mycoplasma bovis (M. bovis) is an important bovine mycoplasma implicated in economically important clinical diseases, such as respiratory diseases, otitis media, and mastitis. The prevalence of M. bovis-associated mastitis in both cattle and buffaloes has been increasingly recognized as a global problem. High morbidity rates and consequential economic losses have been devastating to the affected cattle and buffalo farms, especially those in developing countries. Therefore, a rapid and accurate method is urgently needed to detect M. bovis. In this study, a rapid and simple lateral flow strip for detecting antibodies against M. bovis was established that used carbon nanoparticles (CNPs) as the labelled materials. The results from the test strip were highly consistent with those from ELISA. The test showed high specificity (100%) and no cross-reaction with other bovine pathogens. The detection sensitivity of the test was also relatively high (97.67%). All the results indicated that the colloidal carbon test strip could serve as a simple, rapid, sensitive, and specific diagnostic method for detecting antibodies against M. bovis at cattle farms.
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Shirani I, Zhang H, Zhao G, Lu S, Marawan MA, Dawood A, Chen Y, Chen X, Chen J, Hu C, Chen H, Guo A. In Silico Identification of Novel Immunogenic Secreted Proteins of Mycoplasma bovis from Secretome Data and Experimental Verification. Pathogens 2020; 9:pathogens9090770. [PMID: 32967149 PMCID: PMC7559824 DOI: 10.3390/pathogens9090770] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Revised: 09/15/2020] [Accepted: 09/15/2020] [Indexed: 01/09/2023] Open
Abstract
Mycoplasma bovis is a major pathogen, responsible for bovine respiratory diseases worldwide. The present lack of effective control measures leaves cattle owners at considerable perpetual risk of M. bovis outbreaks. In this study, we identified M. bovis secreted immunogenic proteins in silico as potential candidates for novel diagnostic agents and vaccines. We used immunoinformatics to analyze 438 M. bovis proteins previously identified with a label-free proteomics analysis of virulent M. bovis HB0801 (P1) and its attenuated P150 strains. The subcellular localization of these proteins was preliminarily screened and 59 proteins were found to be secreted extracellular proteins. Twenty-seven of these proteins contained a large number of predictive T-cell epitopes presented by major histocompatibility complex (MHC) class I and II molecules. Twenty-two of these 27 proteins had a high number of conformational B-cell epitopes, predicted from the corresponding 3D structural templates, including one unique to P1, two unique to P150, and 19 common to both strains. Five proteins were selected for further validation, and two of these, MbovP274 and MbovP570, were successfully expressed and purified. Both were confirmed to be secretory and highly immunogenic proteins that induced a mouse antibody response, reacted with cattle serum positive for M. bovis infection, and significantly increased the production of interleukin 8 (IL-8), IL-12 and interferon γ (IFN-γ) during the secretion of these three cytokines by both M. bovis mutants of these genes. These results should be useful in the development of novel immunological agents against M. bovis infection.
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Affiliation(s)
- Ihsanullah Shirani
- The State Key Laboratory of Agricultural Microbiology, Wuhan 430070, China; (I.S.); (H.Z.); (G.Z.); (S.L.); (M.A.M.); (A.D.); (Y.C.); (C.H.); (H.C.)
- College of Veterinary Medicine, Cooperative Innovation Centre of Substantial Pig Production, Huazhong Agricultural University, Wuhan 430070, China; (X.C.); (J.C.)
- Para-Clinic Department, Faculty of Veterinary Medicine, Nangarhar University, Jalalabad 2601, Afghanistan
| | - Hui Zhang
- The State Key Laboratory of Agricultural Microbiology, Wuhan 430070, China; (I.S.); (H.Z.); (G.Z.); (S.L.); (M.A.M.); (A.D.); (Y.C.); (C.H.); (H.C.)
- College of Veterinary Medicine, Cooperative Innovation Centre of Substantial Pig Production, Huazhong Agricultural University, Wuhan 430070, China; (X.C.); (J.C.)
| | - Gang Zhao
- The State Key Laboratory of Agricultural Microbiology, Wuhan 430070, China; (I.S.); (H.Z.); (G.Z.); (S.L.); (M.A.M.); (A.D.); (Y.C.); (C.H.); (H.C.)
- College of Veterinary Medicine, Cooperative Innovation Centre of Substantial Pig Production, Huazhong Agricultural University, Wuhan 430070, China; (X.C.); (J.C.)
| | - Siyi Lu
- The State Key Laboratory of Agricultural Microbiology, Wuhan 430070, China; (I.S.); (H.Z.); (G.Z.); (S.L.); (M.A.M.); (A.D.); (Y.C.); (C.H.); (H.C.)
- College of Veterinary Medicine, Cooperative Innovation Centre of Substantial Pig Production, Huazhong Agricultural University, Wuhan 430070, China; (X.C.); (J.C.)
| | - Marawan A Marawan
- The State Key Laboratory of Agricultural Microbiology, Wuhan 430070, China; (I.S.); (H.Z.); (G.Z.); (S.L.); (M.A.M.); (A.D.); (Y.C.); (C.H.); (H.C.)
- College of Veterinary Medicine, Cooperative Innovation Centre of Substantial Pig Production, Huazhong Agricultural University, Wuhan 430070, China; (X.C.); (J.C.)
- Infectious diseases, Animal Medicine Department, Faculty of Veterinary Medicine, Benha University, Qualyobia 13511, Egypt
| | - Ali Dawood
- The State Key Laboratory of Agricultural Microbiology, Wuhan 430070, China; (I.S.); (H.Z.); (G.Z.); (S.L.); (M.A.M.); (A.D.); (Y.C.); (C.H.); (H.C.)
- College of Veterinary Medicine, Cooperative Innovation Centre of Substantial Pig Production, Huazhong Agricultural University, Wuhan 430070, China; (X.C.); (J.C.)
- Infectious Diseases, Animal Medicine Department, Faculty of Veterinary Medicine, Sadat City University, Sadat City 32511, Egypt
| | - Yingyu Chen
- The State Key Laboratory of Agricultural Microbiology, Wuhan 430070, China; (I.S.); (H.Z.); (G.Z.); (S.L.); (M.A.M.); (A.D.); (Y.C.); (C.H.); (H.C.)
- College of Veterinary Medicine, Cooperative Innovation Centre of Substantial Pig Production, Huazhong Agricultural University, Wuhan 430070, China; (X.C.); (J.C.)
- National Animal Tuberculosis Para-Reference Laboratory (Wuhan) of Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China
- Hubei International Scientific and Technological Cooperation Base of Veterinary Epidemiology, Huazhong Agricultural University, Wuhan 430070, China
| | - Xi Chen
- College of Veterinary Medicine, Cooperative Innovation Centre of Substantial Pig Production, Huazhong Agricultural University, Wuhan 430070, China; (X.C.); (J.C.)
| | - Jianguo Chen
- College of Veterinary Medicine, Cooperative Innovation Centre of Substantial Pig Production, Huazhong Agricultural University, Wuhan 430070, China; (X.C.); (J.C.)
| | - Changmin Hu
- The State Key Laboratory of Agricultural Microbiology, Wuhan 430070, China; (I.S.); (H.Z.); (G.Z.); (S.L.); (M.A.M.); (A.D.); (Y.C.); (C.H.); (H.C.)
| | - Huanchun Chen
- The State Key Laboratory of Agricultural Microbiology, Wuhan 430070, China; (I.S.); (H.Z.); (G.Z.); (S.L.); (M.A.M.); (A.D.); (Y.C.); (C.H.); (H.C.)
- College of Veterinary Medicine, Cooperative Innovation Centre of Substantial Pig Production, Huazhong Agricultural University, Wuhan 430070, China; (X.C.); (J.C.)
- National Animal Tuberculosis Para-Reference Laboratory (Wuhan) of Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China
- Hubei International Scientific and Technological Cooperation Base of Veterinary Epidemiology, Huazhong Agricultural University, Wuhan 430070, China
| | - Aizhen Guo
- The State Key Laboratory of Agricultural Microbiology, Wuhan 430070, China; (I.S.); (H.Z.); (G.Z.); (S.L.); (M.A.M.); (A.D.); (Y.C.); (C.H.); (H.C.)
- College of Veterinary Medicine, Cooperative Innovation Centre of Substantial Pig Production, Huazhong Agricultural University, Wuhan 430070, China; (X.C.); (J.C.)
- National Animal Tuberculosis Para-Reference Laboratory (Wuhan) of Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China
- Hubei International Scientific and Technological Cooperation Base of Veterinary Epidemiology, Huazhong Agricultural University, Wuhan 430070, China
- Correspondence: ; Tel.: +86-27-87286861
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26
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Khan ZG, Patil PO. A comprehensive review on carbon dots and graphene quantum dots based fluorescent sensor for biothiols. Microchem J 2020. [DOI: 10.1016/j.microc.2020.105011] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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27
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Petersen MB, Pedersen L, Pedersen LM, Nielsen LR. Field Experience of Antibody Testing against Mycoplasma bovis in Adult Cows in Commercial Danish Dairy Cattle Herds. Pathogens 2020; 9:pathogens9080637. [PMID: 32781506 PMCID: PMC7460496 DOI: 10.3390/pathogens9080637] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 07/29/2020] [Accepted: 08/03/2020] [Indexed: 12/14/2022] Open
Abstract
Mycoplasma bovis in cattle is difficult to diagnose. Recently, the ID screen® mycoplasma bovis indirect ELISA (ID screen) was commercially released by IDVet. The objectives of this study were to: (1) gain and share experience of using the ID screen in adult dairy cows under field conditions; (2) determine the correlation between antibody levels in milk and serum and (3) compare the ID screen results with those of the Bio K 302 (BioX 302) ELISA from BioX Diagnostics. Paired serum and milk samples were collected from 270 cows from 12 Danish dairy herds with three categories of M. bovis disease history. The ID screen tested nearly all cows positive in all, but the three non-infected herds, while the BioX 302 tested very few cows positive. The ID screen is therefore a much more sensitive test than the BioX 302. However, cows in five exposed herds without signs of ongoing infection and two herds with no history of M. bovis infection also tested ID screen positive. Therefore, the performance and interpretation of the test must be investigated under field conditions in best practice test evaluation setups. A concordance correlation coefficient of 0.66 (95% CI: 0.59–0.72) between the ID screen serum and milk results indicates that milk samples can replace serum samples for the ID screen diagnosis of M. bovis in adult cows.
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Affiliation(s)
- Mette Bisgaard Petersen
- Department of Veterinary Clinical Sciences, University of Copenhagen, Agrovej 5A, 2630 Taastrup, Denmark
- Correspondence:
| | | | | | - Liza Rosenbaum Nielsen
- Department of Animal and Veterinary Sciences, University of Copenhagen, Grønnegårdsvej 8, 1870 Frederiksberg, Denmark;
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Dudek K, Nicholas RAJ, Szacawa E, Bednarek D. Mycoplasma bovis Infections-Occurrence, Diagnosis and Control. Pathogens 2020; 9:E640. [PMID: 32781697 PMCID: PMC7459460 DOI: 10.3390/pathogens9080640] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 08/04/2020] [Accepted: 08/04/2020] [Indexed: 01/13/2023] Open
Abstract
Mycoplasma bovis is a cause of bronchopneumonia, mastitis and arthritis but may also affect other main organs in cattle such us the eye, ear or brain. Despite its non-zoonotic character, M. bovis infections are responsible for substantial economic health and welfare problems worldwide. M. bovis has spread worldwide, including to countries for a long time considered free of the pathogen. Control of M. bovis infections is hampered by a lack of effective vaccines and treatments due to increasing trends in antimicrobial resistance. This review summarizes the latest data on the epizootic situation of M. bovis infections and new sources/routes of transmission of the infection, and discusses the progress in diagnostics. The review includes various recommendations and suggestions which could be applied to infection control programs.
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Affiliation(s)
- Katarzyna Dudek
- Department of Cattle and Sheep Diseases, National Veterinary Research Institute, 57 Partyzantów Avenue, 24100 Pulawy, Poland; (E.S.); (D.B.)
| | | | - Ewelina Szacawa
- Department of Cattle and Sheep Diseases, National Veterinary Research Institute, 57 Partyzantów Avenue, 24100 Pulawy, Poland; (E.S.); (D.B.)
| | - Dariusz Bednarek
- Department of Cattle and Sheep Diseases, National Veterinary Research Institute, 57 Partyzantów Avenue, 24100 Pulawy, Poland; (E.S.); (D.B.)
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AL-FARHA AAB, WAWEGAMA N, HEMMATZADEH F, FIRESTONE S, MOFFAT J, KOJOURI GA, AHANI AZARI A, AMANOLLAHI R, HOARE A, PETROVSKI K. Application of an indirect MilA ELISA for the detection of Mycoplasma bovis antibodies in bovine milk. TURKISH JOURNAL OF VETERINARY AND ANIMAL SCIENCES 2020; 44:752-755. [DOI: 10.3906/vet-1811-62] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Mycoplasma bovis Membrane Protein MilA Is a Multifunctional Lipase with Novel Lipid and Glycosaminoglycan Binding Activity. Infect Immun 2020; 88:IAI.00945-19. [PMID: 32253247 DOI: 10.1128/iai.00945-19] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 03/26/2020] [Indexed: 12/12/2022] Open
Abstract
The survival, replication, and virulence of mycoplasmas depend on their ability to capture and import host-derived nutrients using poorly characterized membrane proteins. Previous studies on the important bovine pathogen Mycoplasma bovis demonstrated that the amino-terminal end of an immunogenic 226-kDa (P226) protein, encoded by milA (the full-length product of which has a predicted molecular weight of 303 kDa), had lipase activity. The predicted sequence of MilA contains glycosaminoglycan binding motifs, as well as multiple copies of a domain of unknown function (DUF445) that is also found in apolipoproteins. We mutagenized the gene to facilitate expression of a series of regions spanning the gene in Escherichia coli Using monospecific antibodies against these recombinant proteins, we showed that MilA was proteolytically processed into 226-kDa and 50-kDa fragments that were both partitioned into the detergent phase by Triton X-114 phase fractionation. Trypsin treatment of intact cells showed that P226 was surface exposed. In vitro, the recombinant regions of MilA bound to 1-anilinonaphthalene-8-sulfonic acid and to a variety of lipids. The MilA fragments were also shown to bind heparin. Antibody against the carboxyl-terminal fragment inhibited the growth of M. bovis in vitro This carboxyl end also bound and hydrolyzed ATP, suggestive of a potential role as an autotransporter. Our studies have demonstrated that DUF445 has lipid binding activity and that MilA is a multifunctional protein that may play multiple roles in the pathogenesis of infection with M. bovis.
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31
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Progresses on bacterial secretomes enlighten research on Mycoplasma secretome. Microb Pathog 2020; 144:104160. [PMID: 32194181 DOI: 10.1016/j.micpath.2020.104160] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 03/12/2020] [Accepted: 03/13/2020] [Indexed: 11/20/2022]
Abstract
Bacterial secretome is a comprehensive catalog of bacterial proteins that are released or secreted outside the cells. They offer a number of factors that possess several significant roles in virulence as well as cell to cell communication and hence play a core role in bacterial pathogenesis. Sometimes these proteins are bounded with membranes giving them the shape of vesicles called extracellular vesicles (EVs) or outer membrane vesicles (OMVs). Bacteria secrete these proteins via Sec and Tat pathways into the periplasm. Secreted proteins have found to be important as diagnostic markers as well as antigenic factors for the development of an effective candidate vaccine. Recently, the research in the field of secretomics is growing up and getting more interesting due to their direct involvement in the pathogenesis of the microorganisms leading to the infection. Many pathogenic bacteria have been studied for their secretome and the results illustrated novel antigens. This review highlights the secretome studies of different pathogenic bacteria in humans and animals, general secretion mechanisms, different approaches and challenges in the secretome of Mycoplasma sp.
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32
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Mahdizadeh S, Sawford K, van Andel M, Browning GF. Efficacy of citric acid and sodium hypochlorite as disinfectants against Mycoplasma bovis. Vet Microbiol 2020; 243:108630. [PMID: 32273009 DOI: 10.1016/j.vetmic.2020.108630] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2019] [Accepted: 02/26/2020] [Indexed: 11/29/2022]
Abstract
Mycoplasma bovis, a cattle pathogen of major economic importance across the globe, causes a range of diseases, including pneumonia and mastitis. Because of the limited options for effective treatment of these diseases, prevention and control are preferred to diagnosis and treatment. In this study, the efficacies of citric acid and sodium hypochlorite as disinfectants against M. bovis were tested using a modification of a standardised method for assessing the efficacy of disinfectants against bacteria. A citric acid concentration of 0.5 % was found to be an effective disinfectant, reducing infectivity by close to 106 fold, while sodium hypochlorite at 1% was found to have similar efficacy to 0.5 % citric acid. A 0.04 % concentration of sodium hypochlorite was effective against M. bovis only in the absence of any organic material. Under these conditions, 0.25 % citric acid found to have similar efficacy. These findings indicate that 0.5 % citric acid or 1 % sodium hypochlorite are likely to be effective disinfectants for M. bovis under field conditions and 0.04 % sodium hypochlorite or 0.25 % citric acid are likely to be effective following removal of organic material.
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Affiliation(s)
- Sara Mahdizadeh
- Asia-Pacific Centre for Animal Health, Melbourne Veterinary School, University of Melbourne, Victoria, 3010, Australia
| | - Kate Sawford
- Ministry for Primary Industries, Mycoplasma bovis Directorate, Biosecurity New Zealand, Wellington, 6140, New Zealand; Kate Sawford Epidemiological Consulting Pty Ltd., New South Wales, 2622, Australia
| | - Mary van Andel
- Ministry for Primary Industries, Mycoplasma bovis Directorate, Biosecurity New Zealand, Wellington, 6140, New Zealand
| | - Glenn F Browning
- Asia-Pacific Centre for Animal Health, Melbourne Veterinary School, University of Melbourne, Victoria, 3010, Australia.
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Maunsell FP, Chase C. Mycoplasma bovis: Interactions with the Immune System and Failure to Generate an Effective Immune Response. Vet Clin North Am Food Anim Pract 2019; 35:471-483. [PMID: 31590898 DOI: 10.1016/j.cvfa.2019.08.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Host responses are often ineffective at clearing Mycoplasma bovis infection and may contribute to the pathogenesis of disease. M bovis possesses a surprisingly large repertoire of strategies to evade and modulate host responses. Unopsonized M bovis impairs phagocytosis and killing by neutrophils and macrophages. Apoptosis of neutrophils and lymphocytes is enhanced, whereas it is delayed in macrophages. Both proinflammatory and antiinflammatory cytokines are stimulated during M bovis infection depending on the cell type and location, and overall systemic responses tend to have a T-helper 2 bias. M bovis reduces proliferation of T cells and, in chronic infection, causes T-cell exhaustion.
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Affiliation(s)
- Fiona P Maunsell
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, PO Box 100136, Gainesville, FL 32610, USA.
| | - Christopher Chase
- Department of Veterinary and Biomedical Sciences, South Dakota State University, PO Box 2175, SAR Room 125 North Campus Drive, Brookings, SD 57007, USA
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Andersson AM, Aspán A, Wisselink HJ, Smid B, Ridley A, Pelkonen S, Autio T, Lauritsen KT, Kensø J, Gaurivaud P, Tardy F. A European inter-laboratory trial to evaluate the performance of three serological methods for diagnosis of Mycoplasma bovis infection in cattle using latent class analysis. BMC Vet Res 2019; 15:369. [PMID: 31653217 PMCID: PMC6814985 DOI: 10.1186/s12917-019-2117-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Accepted: 09/27/2019] [Indexed: 01/22/2023] Open
Abstract
Background Mycoplasma bovis (M. bovis) is an emerging bovine pathogen, leading to significant economic losses in the livestock industry worldwide. Infection can result in a variety of clinical signs, such as arthritis, pneumonia, mastitis and keratoconjunctivitis, none of which are M. bovis-specific. Laboratory diagnosis is therefore important. Serological tests to detect M. bovis antibodies is considered an effective indicator of infection in a herd and often used as a herd test. Combined with clinical judgement, it can also be used to implement control strategies and/or to estimate the disease prevalence within a country. However, due to lack of harmonisation of approaches to testing, and serological tests used by different laboratories, comparisons of prevalence data between countries is often difficult. A network of researchers from six European countries designed and participated in an inter-laboratory trial, with the aim of evaluating the sensitivity (Se) and specificity (Sp) of two commercially available ELISA tests (ID Screen® ELISA (IDvet) and BIO K302 ELISA (BIO-X Diagnostics)) for diagnosis of M. bovis infection. Each laboratory received a blinded panel of bovine sera and tested independently, according to manufacturer’s instructions. Western blot analyses (WB) performed by one of the participating laboratories was used as a third diagnostic test in the statistical evaluation of Se and Sp values using latent class analysis. Results The Se of WB, the ID Screen® ELISA and the BIO K302 ELISA were determined to be 91.8, 93.5 and 49.1% respectively, and corresponding Sp of the three tests were 99.6, 98.6 and 89.6%, respectively. Conclusions The present study is, to our knowledge, the first to present an inter-laboratory comparison of the BIO K302 ELISA and the ID Screen® ELISA. Based on our results, the ID Screen® ELISA showed high consistency with WB and performed with higher precision and accuracy than the BIO K302 ELISA.
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Affiliation(s)
| | - Anna Aspán
- National Veterinary Institute (SVA), Uppsala, Sweden
| | - Henk J Wisselink
- Wageningen Bioveterinary Research, P.O. Box 65, 8200, AB, Lelystad, the Netherlands.
| | - Bregtje Smid
- Wageningen Bioveterinary Research, P.O. Box 65, 8200, AB, Lelystad, the Netherlands
| | - Anne Ridley
- Animal and Plant Health Agency (APHA), Surrey, UK
| | | | | | | | - Jane Kensø
- National Veterinary Institute, Technical University of Denmark, Kgs Lyngby, Denmark
| | - Patrice Gaurivaud
- Université de Lyon, Anses, Laboratoire de Lyon, UMR Mycoplasmoses des ruminants, Lyon, France
| | - Florence Tardy
- Université de Lyon, Anses, Laboratoire de Lyon, UMR Mycoplasmoses des ruminants, Lyon, France
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35
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Liu X, Yu S, Feng C, Mao D, Li J, Zhu X. In situ Analysis of Cancer Cells Based on DNA Signal Amplification and DNA Nanodevices. Crit Rev Anal Chem 2019; 51:8-19. [PMID: 31613139 DOI: 10.1080/10408347.2019.1674631] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Cancer is a global disease which has been disturbing researchers in medicine and seriously threatens patients' health and lifetime around the world in the past several decades. Due to the characteristics of cancer cells, such as uncontrollable cell proliferation, cell invasion and metastasis to surrounding tissues, lower grade of differentiation, higher telomerase activity and others, it has been one of the most usual lethal factors, next to heart disease in incidence. Cancer mortality can be decreased by early diagnosis, and the people who with treatment at an early stage have an obvious improved survival rate. Consequently, early detection is significant for better understanding the pathogenesis of cancer and improving the prognosis of patients. In situ detection technique is a vital tool for imaging and cellular pathology research, which can provide effective information about tumor markers in the early cancer detection. In view of low expression of most tumor markers in the early stage of cancers, detection techniques based on DNA signal amplification and DNA nanodevices can provide a strong support for the diagnosis and detection of cancers. In this review, we summarize the research progress of different analytical techniques for detecting various tumor markers that have been reported in recent years. We compare different DNA amplification and nanodevices, then provide guidance and suggestions for better understanding in situ analysis of cancer cells.
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Affiliation(s)
- Xiaohao Liu
- Center for Molecular Recognition and Biosensing, School of Life Sciences, Shanghai University, Shanghai, P. R. China
| | - Sinuo Yu
- Center for Molecular Recognition and Biosensing, School of Life Sciences, Shanghai University, Shanghai, P. R. China
| | - Chang Feng
- Center for Molecular Recognition and Biosensing, School of Life Sciences, Shanghai University, Shanghai, P. R. China
| | - Dongsheng Mao
- Center for Molecular Recognition and Biosensing, School of Life Sciences, Shanghai University, Shanghai, P. R. China
| | - Jinlong Li
- Department of Laboratory Medicine, the Second Hospital of Nanjing, Nanjing University of Chinese Medicine, Nanjing, P. R. China
| | - Xiaoli Zhu
- Center for Molecular Recognition and Biosensing, School of Life Sciences, Shanghai University, Shanghai, P. R. China
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36
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Dong W, Wang R, Gong X, Dong C. An efficient turn-on fluorescence biosensor for the detection of glutathione based on FRET between N,S dual-doped carbon dots and gold nanoparticles. Anal Bioanal Chem 2019; 411:6687-6695. [PMID: 31407048 DOI: 10.1007/s00216-019-02042-3] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 07/11/2019] [Accepted: 07/17/2019] [Indexed: 02/01/2023]
Abstract
Fluorescence resonance energy transfer (FRET) is a kind of energy transfer mechanism depending on the distance between donor and acceptor, which exhibited potential application in biosensors. In this study, an efficient fluorescence "turn-on" strategy for the detection of glutathione (GSH) has been established based on FRET between nitrogen and sulfur dual-doped carbon dots (N,S-CDs) and gold nanoparticles (Au NPs). A novel N,S-CDs was synthesized by a one-pot hydrothermal treatment of 3-aminothiophenol, which possessed excellent fluorescence property with the maximum emission wavelength of 530 nm. Then, the as-prepared N,S-CDs served as energy donor to transfer energy to Au NPs via FRET process, resulting in fluorescence quenching of N,S-CDs. However, the fluorescence of N,S-CDs was recovered efficiently by adding GSH into the mixture solution of N,S-CDs and Au NPs. Therefore, the FRET assembly of N,S-CDs and Au NPs was used as a fluorescence probe for the "turn-on" sensing GSH with the linear range from 3.8 to 415.1 μM and the limit detection of 0.21 μM. This nanosensor platform was employed to monitor GSH in serum samples with satisfying results. Graphical abstract.
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Affiliation(s)
- Wenjuan Dong
- Institute of Environmental Science, and School of Chemistry and Chemical Engineering, Shanxi University, 92 Wu Cheng Road, Taiyuan, 030006, Shanxi, China.
| | - Ruiping Wang
- Institute of Environmental Science, and School of Chemistry and Chemical Engineering, Shanxi University, 92 Wu Cheng Road, Taiyuan, 030006, Shanxi, China
| | - Xiaojuan Gong
- Institute of Environmental Science, and School of Chemistry and Chemical Engineering, Shanxi University, 92 Wu Cheng Road, Taiyuan, 030006, Shanxi, China.
| | - Chuan Dong
- Institute of Environmental Science, and School of Chemistry and Chemical Engineering, Shanxi University, 92 Wu Cheng Road, Taiyuan, 030006, Shanxi, China
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37
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Peng C, Xing H, Fan X, Xue Y, Li J, Wang E. Glutathione Regulated Inner Filter Effect of MnO 2 Nanosheets on Boron Nitride Quantum Dots for Sensitive Assay. Anal Chem 2019; 91:5762-5767. [PMID: 30957481 DOI: 10.1021/acs.analchem.8b05961] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Glutathione (GSH) can help the body maintain the function of the normal immune system and its level change is associated with a variety of diseases. To achieve the ultrasensitive assay of GSH, a "switch on" nanosensor is designed on the basis of GSH regulating the inner filter effect (IFE) of MnO2 nanosheets (MnO2 NS) on boron nitride quantum dots (BNQDs). Here, the fluorescence of BNQDs is quenched efficiently in the presence of redoxable MnO2 NS because of the superior light absorption capability; however, the introduction of GSH can trigger the decomposition of MnO2 to Mn2+ and weaken the IFE, causing the partial fluorescence recovery. The recovered fluorescence is dependent on the concentration of GSH. Under the optimal conditions, this sensing platform shows the response to GSH in the range of 0.5-250 μM with the detection limit of 160 nM. On the basis of the GSH activated reduction of MnO2 NS, the MnO2 NS/BNQDs nanoprobes exhibit good selectivity to GSH. The practical application of the proposed system is demonstrated by detecting the GSH in human plasma samples with satisfying results.
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Affiliation(s)
- Chao Peng
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun , Jilin 130022 , China.,University of Science and Technology of China , Hefei , Anhui 230026 , China
| | - Huanhuan Xing
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun , Jilin 130022 , China.,University of Science and Technology of China , Hefei , Anhui 230026 , China
| | - Xiushuang Fan
- Department of Anesthesiology , The First Hospital of Jilin University , Changchun , Jilin 130021 , China
| | - Yuan Xue
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun , Jilin 130022 , China.,University of Science and Technology of China , Hefei , Anhui 230026 , China
| | - Jing Li
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun , Jilin 130022 , China.,University of Science and Technology of China , Hefei , Anhui 230026 , China
| | - Erkang Wang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun , Jilin 130022 , China.,University of Science and Technology of China , Hefei , Anhui 230026 , China
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38
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Zhang H, Chen J, Yang Y, Wang L, Li Z, Qiu H. Discriminative Detection of Glutathione in Cell Lysates Based on Oxidase-Like Activity of Magnetic Nanoporous Graphene. Anal Chem 2019; 91:5004-5010. [PMID: 30889954 DOI: 10.1021/acs.analchem.8b04779] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
As the most abundant intracellular biothiol, glutathione (GSH) plays a central role in many cellular functions and has been proved to be associated with numerous clinical diseases. Nevertheless, it is still a challenge to detect GSH over other mercaptoamino acids owing to their similar structures and activities. In this paper, magnetic nanoporous graphene (MNPG) nanocomposites were prepared for the first time through partial combustion of graphene oxide (GO) and ferric chloride. Due to the combination of porous graphene and magnetic nanoparticles, the MNPG nanocomposites exhibited large specific surface area, fast mass, and electron transport kinetics, resulting in remarkable oxidase mimic activity and easy separation. On the basis of the inhibition effect of GSH on the MNPG-catalyzed oxidation of thiamine, a novel and simple method for fluorescence determination of GSH was established. The sensor displayed a good linear response in the range of 0.2-20 μM toward GSH with a limit of detection of 0.05 μM. High sensitivity and selectivity facilitated its practical application for discriminative detection of GSH levels in PC12 cell lysates. The presented assay will be a simple and powerful tool to monitor intracellular GSH levels for biomedical diagnosis. Furthermore, the MNPG nanocomposites will provide insights to construct nanoporous graphene-based hybrids and push forward the advancement of porous graphene for wide applications.
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Affiliation(s)
- Haijuan Zhang
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources/Key Laboratory for Natural Medicine of Gansu Province , Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000 , China
| | - Jia Chen
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources/Key Laboratory for Natural Medicine of Gansu Province , Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000 , China
| | - Yali Yang
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources/Key Laboratory for Natural Medicine of Gansu Province , Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000 , China
| | - Li Wang
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources/Key Laboratory for Natural Medicine of Gansu Province , Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000 , China
| | - Zhan Li
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources/Key Laboratory for Natural Medicine of Gansu Province , Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000 , China
| | - Hongdeng Qiu
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources/Key Laboratory for Natural Medicine of Gansu Province , Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000 , China
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Sun J, Liu F, Yu W, Jiang Q, Hu J, Liu Y, Wang F, Liu X. Highly sensitive glutathione assay and intracellular imaging with functionalized semiconductor quantum dots. NANOSCALE 2019; 11:5014-5020. [PMID: 30839981 DOI: 10.1039/c8nr09801h] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Glutathione (GSH) plays a vital role in biological systems and is associated with human pathology. The engineering of semiconductor quantum dots (QDs) as fluorescent probes for GSH sensing and bioimaging is a potential yet rarely reported approach. Herein, we report the in situ growth of manganese dioxide nanosheets (MnO2) on silica-coated semiconductor quantum dots (QD@SiO2), to prepare a stable and biocompatible fluorescent nanoprobe (QD@SiO2-MnO2) for the selective and sensitive detection of GSH. The modification of QD@SiO2 with MnO2 significantly quenched the fluorescence of CdSe/ZnS QDs, yet the addition of GSH efficiently recovered the fluorescence of the nanoprobe due to the decomposition of MnO2 by GSH. This nanosensor showed a rapid response to GSH with a low detection limit, and high selectivity towards GSH over potential interferences. Furthermore, the MnO2-engineered QDs had good biocompatibility and cellular uptake ability, and were successfully applied for the real-time imaging of intracellular GSH. We envision that semiconductor QD-based probes will stimulate the study of GSH dynamics and facilitate the understanding of GSH-related pathophysiological events.
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Affiliation(s)
- Junlin Sun
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, P. R. China.
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Characterisation of the course of Mycoplasma bovis infection in naturally infected dairy herds. Vet Microbiol 2019; 231:107-115. [PMID: 30955796 DOI: 10.1016/j.vetmic.2019.03.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 03/07/2019] [Accepted: 03/09/2019] [Indexed: 11/22/2022]
Abstract
Mycoplasma bovis causes bovine respiratory disease, mastitis, arthritis and otitis. The importance of M. bovis has escalated because of recent outbreaks and introductions into countries previously free of M. bovis. We characterized the course of M. bovis infection on 19 recently infected dairy farms over 24 months. Our objective was to identify diagnostic tools to assess the efficacy of control measures to assess low risk infection status on M. bovis infected farms. PCR assays and culture were used to detect M. bovis, and in-house and BioX ELISAs were used to follow antibody responses. Cows and young stock were sampled on four separate occasions, and clinical cases were sampled when they arose. On 17 farms, a few cases of clinical mastitis were detected, mostly within the first eight weeks after the index case. Antibodies detected by in-house ELISA persisted in the serum of cows at least for 1.5 years on all farms, regardless of the M. bovis infection status or signs of clinical disease or subclinical mastitis on the farm. Six out of 19 farms became low risk as the infection was resolved. Our results suggest that, for biosecurity purposes, regular monitoring should be conducted on herds by screening for M. bovis in samples from cows with clinical mastitis and calves with pneumonia, in conjunction with testing young stock by screening longitudinally collected nasal swabs for M. bovis and sequential serum samples for antibody against recombinant antigen.
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Tang S, You X, Fang Q, Li X, Li G, Chen J, Chen W. A Fluorescence Inner-Filter Effect Based Sensing Platform for Turn-On Detection of Glutathione in Human Serum. SENSORS (BASEL, SWITZERLAND) 2019; 19:E228. [PMID: 30634480 PMCID: PMC6358875 DOI: 10.3390/s19020228] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Revised: 12/27/2018] [Accepted: 01/02/2019] [Indexed: 11/26/2022]
Abstract
A novel turn-on fluorescence assay was developed for the rapid detection of glutathione (GSH) based on the inner-filter effect (IFE) and redox reaction. Molybdenum disulfide quantum dots (MoS₂ QDs), which have stable fluorescent properties, were synthesized with hydrothermal method. Manganese dioxide nanosheets (MnO₂ NSs) were prepared by exfoliating the bulk δ-MnO₂ material in bovine serum albumin (BSA) aqueous solution. The morphology structures of the prepared nanoparticles were characterized by transmission electron microscope (TEM). Studies have shown that the fluorescence of MoS₂ QDs could be quenched in the presence of MnO₂ NSs as a result of the IFE, and is recovered after the addition of GSH to dissolve the MnO₂ NSs. The fluorescence intensity showed a good linear relationship with the GSH concentration in the range 20⁻2500 μM, the limit of detection was 1.0 μM. The detection method was applied to the analysis of GSH in human serum samples. This simple, rapid, and cost-effective method has great potential in analyzing GSH and in disease diagnosis.
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Affiliation(s)
- Shurong Tang
- Department of Pharmaceutical Analysis, Faculty of Pharmacy, Fujian Medical University, Fuzhou 350108, China.
| | - Xiuhua You
- Department of Pharmaceutical Analysis, Faculty of Pharmacy, Fujian Medical University, Fuzhou 350108, China.
| | - Quanhui Fang
- Department of Pharmaceutical Analysis, Faculty of Pharmacy, Fujian Medical University, Fuzhou 350108, China.
| | - Xin Li
- Department of Pharmaceutical Analysis, Faculty of Pharmacy, Fujian Medical University, Fuzhou 350108, China.
| | - Guangwen Li
- Department of Pharmaceutical Analysis, Faculty of Pharmacy, Fujian Medical University, Fuzhou 350108, China.
| | - Jinghua Chen
- Department of Pharmaceutical Analysis, Faculty of Pharmacy, Fujian Medical University, Fuzhou 350108, China.
| | - Wei Chen
- Department of Pharmaceutical Analysis, Faculty of Pharmacy, Fujian Medical University, Fuzhou 350108, China.
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42
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Aktara MN, Nayim S, Sahoo NK, Hossain M. The synthesis of thiol-stabilized silver nanoparticles and their application towards the nanomolar-level colorimetric recognition of glutathione. NEW J CHEM 2019. [DOI: 10.1039/c9nj01360a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The synthesis and characterization of 5-methyl-1,3,4-thiadiazole-2-thiol fabricated silver nanoparticles and their application to detect glutathione.
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Affiliation(s)
- Mt Nasima Aktara
- Department of Chemistry and Chemical Technology
- Vidyasagar University
- Midnapore 721 102
- India
| | - Sk Nayim
- Department of Chemistry and Chemical Technology
- Vidyasagar University
- Midnapore 721 102
- India
| | - Nandan Kumar Sahoo
- Department of Chemistry and Chemical Technology
- Vidyasagar University
- Midnapore 721 102
- India
| | - Maidul Hossain
- Department of Chemistry and Chemical Technology
- Vidyasagar University
- Midnapore 721 102
- India
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43
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Mycoplasma bovis and bovine respiratory disease: A risk factor study in Australian feeder cattle. Prev Vet Med 2018; 157:152-161. [DOI: 10.1016/j.prevetmed.2018.06.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Revised: 05/14/2018] [Accepted: 06/19/2018] [Indexed: 11/17/2022]
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44
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Petersen MB, Wawegama NK, Denwood M, Markham PF, Browning GF, Nielsen LR. Mycoplasma bovis antibody dynamics in naturally exposed dairy calves according to two diagnostic tests. BMC Vet Res 2018; 14:258. [PMID: 30165859 PMCID: PMC6117878 DOI: 10.1186/s12917-018-1574-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Accepted: 08/16/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Inexpensive and convenient diagnostic tests for use in clinical work and for the surveillance of infection with Mycoplasma bovis are in demand. The objective of this longitudinal field study was to gain knowledge about the dynamics of antibodies against M. bovis in sera from naturally exposed calves with and without different clinical signs, measured by two different ELISA tests. RESULTS A total of 83 calves were subject to between one and five blood samples and clinical examinations using a standard protocol during five herd visits to each of four outbreak dairy herds. The blood samples were analysed for the presence of antibodies against M. bovis using the commercial IgG ELISA test BioX K302 (BioX) and an in-house indirect IgG ELISA test (MilA ELISA). Linear mixed models were used to describe and compare the antibody dynamics as measured by the two tests in relation to the disease status and age of the animals. The BioX ELISA response was below the recommended cut-off (37 ODC%) for the entire study period in many of the calves. The estimated mean ODC% increased slowly but did not reach the recommended individual animal cut-off in three of the four herds. The highest estimated ODC% was not reached until the calf was 110-130 days old. The MilA ELISA response rose above the recommended cut-off (135 antibody units (AU)) in almost all calves, and in two herds, the estimated mean was above the individual animal cut-off shortly after the birth of the calf. The highest estimated antibody concentration was reached when the calf was approximately 60 days old. Disease status of the calf was not significantly associated with the results of either test. CONCLUSIONS We conclude that the BioX ELISA cannot be recommended for use in calves below 3 months of age. The MilA ELISA was able to detect antibodies shortly after birth (i.e. from approximately 3 weeks of age and onwards) and is therefore a more sensitive test for M. bovis exposure in young calves. Neither ELISA seemed able to differentiate between calves with arthritis and/or otitis media, and respiratory disease.
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Affiliation(s)
- Mette Bisgaard Petersen
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Grønnegårdsvej 8, 1870, Frederiksberg, Denmark.
| | - Nadeeka K Wawegama
- Asia-Pacific Centre for Animal Health, Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, VIC, 3010, Australia
| | - Matthew Denwood
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Grønnegårdsvej 8, 1870, Frederiksberg, Denmark
| | - Philip F Markham
- Asia-Pacific Centre for Animal Health, Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, VIC, 3010, Australia
| | - Glenn F Browning
- Asia-Pacific Centre for Animal Health, Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, VIC, 3010, Australia
| | - Liza Rosenbaum Nielsen
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Grønnegårdsvej 8, 1870, Frederiksberg, Denmark
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Hazelton M, Morton J, Bosward K, Sheehy P, Parker A, Dwyer C, Niven P, House J. Isolation of Mycoplasma spp. and serological responses in bulls prior to and following their introduction into Mycoplasma bovis-infected dairy herds. J Dairy Sci 2018; 101:7412-7424. [DOI: 10.3168/jds.2018-14457] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 04/07/2018] [Indexed: 11/19/2022]
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Parker AM, Sheehy PA, Hazelton MS, Bosward KL, House JK. A review of mycoplasma diagnostics in cattle. J Vet Intern Med 2018; 32:1241-1252. [PMID: 29671903 PMCID: PMC5980305 DOI: 10.1111/jvim.15135] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 02/25/2018] [Accepted: 03/20/2018] [Indexed: 01/21/2023] Open
Abstract
Mycoplasma species have a global distribution causing serious diseases in cattle worldwide including mastitis, arthritis, pneumonia, otitis media and reproductive disorders. Mycoplasma species are typically highly contagious, are capable of causing severe disease, and are difficult infections to resolve requiring rapid and accurate diagnosis to prevent and control disease outbreaks. This review discusses the development and use of different diagnostic methods to identify Mycoplasma species relevant to cattle, with a particular focus on Mycoplasma bovis. Traditionally, the identification and diagnosis of mycoplasma has been performed via microbial culture. More recently, the use of polymerase chain reaction to detect Mycoplasma species from various bovine samples has increased. Polymerase chain reaction has a higher efficiency, specificity, and sensitivity for laboratory diagnosis when compared with conventional culture‐based methods. Several tools are now available for typing Mycoplasma spp. isolates, allowing for genetic characterization in disease outbreak investigations. Serological diagnosis through the use of indirect ELISA allows the detection of antimycoplasma antibodies in sera and milk, with their use demonstrated on individual animal samples as well as BTM samples. While each testing method has strengths and limitations, their combined use provides complementary information, which when interpreted in conjunction with clinical signs and herd history, facilitates pathogen detection, and characterization of the disease status of cattle populations.
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Affiliation(s)
- Alysia M Parker
- Sydney School of Veterinary Science, The University of Sydney, Camden, New South Wales, Australia
| | - Paul A Sheehy
- Sydney School of Veterinary Science, The University of Sydney, Camden, New South Wales, Australia
| | - Mark S Hazelton
- Sydney School of Veterinary Science, The University of Sydney, Camden, New South Wales, Australia
| | - Katrina L Bosward
- Sydney School of Veterinary Science, The University of Sydney, Camden, New South Wales, Australia
| | - John K House
- Sydney School of Veterinary Science, The University of Sydney, Camden, New South Wales, Australia
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Calcutt MJ, Lysnyansky I, Sachse K, Fox LK, Nicholas RAJ, Ayling RD. Gap analysis of Mycoplasma bovis disease, diagnosis and control: An aid to identify future development requirements. Transbound Emerg Dis 2018; 65 Suppl 1:91-109. [PMID: 29582590 DOI: 10.1111/tbed.12860] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2017] [Indexed: 01/07/2023]
Abstract
There is a worldwide problem of disease caused by Mycoplasma (M.) bovis in cattle; it has a significant detrimental economic and animal welfare impact on cattle rearing. Infection can manifest as a plethora of clinical signs including mastitis, pneumonia, arthritis, keratoconjunctivitis, otitis media and genital disorders that may result in infertility and abortion. Current diagnosis and control information are reviewed and analysed to identify gaps in knowledge of the causative organism in respect of the disease pathology, diagnosis and control methods. The main considerations are as follows: no vaccines are commercially available; antimicrobial resistance is increasing; diagnostic and antimicrobial sensitivity testing needs to be improved; and a pen-side test would facilitate more rapid diagnosis and implementation of treatment with antimicrobials. More data on host susceptibility, stress factors, immune response and infectious dose levels are required. The impact of asymptomatic carriers, M. bovis survival in the environment and the role of wildlife in transmitting the disease also needs investigation. To facilitate development of vaccines, further analysis of more M. bovis genomes, its pathogenic mechanisms, including variable surface proteins, is required, along with reproducible disease models.
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Affiliation(s)
| | | | - K Sachse
- Friedrich-Loeffler-Institut, Jena, Germany.,Department of RNA Bioinformatics and High-Throughput Analysis, Faculty of Mathematics and Computer Science, Friedrich-Schiller-Universität, Jena, Germany
| | - L K Fox
- Washington State University, Pullman, WA, USA
| | | | - R D Ayling
- Animal and Plant Health Agency, Addlestone, UK
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Schibrowski ML, Barnes TS, Wawegama NK, Vance ME, Markham PF, Mansell PD, Marenda MS, Kanci A, Perez-Casal J, Browning GF, Gibson JS, Mahony TJ. The Performance of Three Immune Assays to Assess the Serological Status of Cattle Experimentally Exposed to Mycoplasma bovis. Vet Sci 2018. [PMID: 29518043 PMCID: PMC5876582 DOI: 10.3390/vetsci5010027] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Mycoplasma bovis is associated with several clinical syndromes of cattle. Currently, limited information is available on the sensitivity (Se) and specificity (Sp) of serological assays used for the detection of M. bovis-specific antibodies. Consequently, it is difficult to critically evaluate the outcomes of studies that use these assays. Therefore, the current study used bovine sera sourced from M. bovis exposure studies from three countries to estimate the Se and Sp of two commercial M. bovis enzyme-linked immunosorbent assays (ELISA), BIO K302 and BIO K260, and Western blotting. Western blotting had the highest Se estimate of 74% (95% confidence interval (CI): 16–98%), compared to the BIO K302: 47% (95% CI: 10–87%) and BIO K260: 28% (95% CI: 1–92%). However, for Sp, the BIO K302: 96% (95% CI: 87–99%) and the BIO K260: 100% (95% CI: 93–100%) out-performed Western blotting: 88% (95% CI: 56–98%). Western blotting was the best assay for detecting seroconversion, correctly identifying 61% (95% CI: 29–86%) of exposed animals compared to 35% for BIO K302 (95% CI: 21–54%) and 8% for BIO K260 (95% CI: 0–87%). While none of the methods assessed had high Se and Sp, the availability of these estimates will aid in the interpretation of studies that use these assays. The results of this study highlight the difficulties encountered when using serology to detect exposure to M. bovis in cattle.
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Affiliation(s)
- Meghan L Schibrowski
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, St Lucia, QLD 4072, Australia.
| | - Tamsin S Barnes
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, St Lucia, QLD 4072, Australia.
- School of Veterinary Science, The University of Queensland, Gatton, QLD 4343, Australia.
| | - Nadeeka K Wawegama
- Asia-Pacific Centre for Animal Health, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, VIC 3010, Australia.
| | - Megan E Vance
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, St Lucia, QLD 4072, Australia.
| | - Philip F Markham
- Asia-Pacific Centre for Animal Health, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, VIC 3010, Australia.
| | - Peter D Mansell
- Asia-Pacific Centre for Animal Health, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, VIC 3010, Australia.
| | - Marc S Marenda
- Asia-Pacific Centre for Animal Health, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, VIC 3010, Australia.
| | - Anna Kanci
- Asia-Pacific Centre for Animal Health, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, VIC 3010, Australia.
| | - José Perez-Casal
- Vaccine and Infectious Disease Organization-International Vaccine Centre (VIDO-InterVac), 120 Veterinary Road, Saskatoon, SK S7N 5E3, Canada.
| | - Glenn F Browning
- Asia-Pacific Centre for Animal Health, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, VIC 3010, Australia.
| | - Justine S Gibson
- School of Veterinary Science, The University of Queensland, Gatton, QLD 4343, Australia.
| | - Timothy J Mahony
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, St Lucia, QLD 4072, Australia.
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Chen S, Hao H, Zhao P, Ji W, Li M, Liu Y, Chu Y. Differential Immunoreactivity to Bovine Convalescent Serum Between Mycoplasma bovis Biofilms and Planktonic Cells Revealed by Comparative Immunoproteomic Analysis. Front Microbiol 2018; 9:379. [PMID: 29556225 PMCID: PMC5844979 DOI: 10.3389/fmicb.2018.00379] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Accepted: 02/20/2018] [Indexed: 01/17/2023] Open
Abstract
Mycoplasma bovis is a major bovine pathogen that causes considerable economic losses in the cattle industry worldwide. Moreover, M. bovis biofilm can persist in the environment and its host. To date, M. bovis biofilm antigens recognized by bovine convalescent sera and their comparison with planktonic cells have not yet been explored. This study utilized an immunoproteomic approach using two-dimensional electrophoresis, immunoblotting using convalescent bovine serum, and subsequent matrix-assisted laser desorption/ionization time-of-flight tandem mass spectrometry (MALDI-TOF/TOF MS) to identify the immunoreactive proteins expressed in biofilm- and planktonic-grown M. bovis strain 08M. Results showed that M. bovis biofilms and planktonic cells demonstrate differential immunoreactivity to bovine convalescent serum for the first time. A total of 10 and 8 immunoreactive proteins were identified for biofilms and planktonic cells, respectively. To our knowledge, a total of 12 out of 15 had not been reported as immunoreactive proteins in M. bovis, and six were specific to M. bovis biofilms. Three proteins, namely, endoglucanase, thiol peroxidase, and one putative membrane protein, that is, mycoplasma immunogenic lipase A, were identified in planktonic cells and biofilms. Most of the identified proteins were cytoplasmic proteins that were mainly involved in transport and metabolism. Moreover, ATP binding, oxidoreductase activity, and GTP binding were their most representative molecular functions. DnaK and Tuf appeared to be the most interactive immunoreactive agent among the identified proteins. Furthermore, six proteins had potential as serodiagnostic antigens. These data will be helpful to improve our current understanding on the host response to M. bovis biofilms and planktonic cells, which may facilitate the development of novel molecular candidates of improved diagnostics and vaccines to prevent M. bovis infections.
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Affiliation(s)
- Shengli Chen
- State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Huafang Hao
- State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Ping Zhao
- State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Wenheng Ji
- State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Mingxia Li
- State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Yongsheng Liu
- State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Yuefeng Chu
- State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
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Yuan D, Ding L, Sun Z, Li X. MRI/Fluorescence bimodal amplification system for cellular GSH detection and tumor cell imaging based on manganese dioxide nanosheet. Sci Rep 2018; 8:1747. [PMID: 29379132 PMCID: PMC5788857 DOI: 10.1038/s41598-018-20110-z] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Accepted: 01/11/2018] [Indexed: 11/22/2022] Open
Abstract
Here, we report a novel magnetic resonance imaging (MRI)/fluorescence bimodal amplification platform for the detection of glutathione (GSH) on the basis of redoxable manganese dioxide (MnO2) nanosheets, which can be readily applied as a DNA nanocarrier, fluorescence quencher, and intracellular GSH-activated MRI contrast agent. The binding of aptamers that absorbed on the MnO2 nanosheets to their target can facilitating the endocytosis of target-nanoprobes. Once endocytosed, the MnO2 nanosheets can react with cellular GSH, resulting in the disintegration of nanosheets to generate plenty of Mn2+ ions for MRI and releases the primers which were adsorbed on the MnO2 nanosheets. Then the rolling circle amplification (RCA) reaction was initiated to amplify the fluorescence signal. In addition, after treatment with GSH, the MnO2 nanosheets were reduced and then most of the fluorescence was recovered. Therefore, this MnO2 nanoprobe exhibits excellent selectivity, suggesting a potential detection platform for analyzing the glutathione level in cells.
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Affiliation(s)
- Dandan Yuan
- Center of Cooperative Innovation for Chemical Imaging Functional Probes in Universities of Shandong, College of Chemistry, Shandong Normal University, Jinan, 250014, P. R. China.,Shandong Provincial Key Laboratory of Detection Technology for Tumor Markers, School of Chemistry and Chemical Engineering, Research Institute of Biochemical Analysis, Linyi University, Linyi, 276005, P. R. China
| | - Lairong Ding
- Center of Cooperative Innovation for Chemical Imaging Functional Probes in Universities of Shandong, College of Chemistry, Shandong Normal University, Jinan, 250014, P. R. China.,Shandong Provincial Key Laboratory of Detection Technology for Tumor Markers, School of Chemistry and Chemical Engineering, Research Institute of Biochemical Analysis, Linyi University, Linyi, 276005, P. R. China
| | - Zhaomei Sun
- Shandong Provincial Key Laboratory of Detection Technology for Tumor Markers, School of Chemistry and Chemical Engineering, Research Institute of Biochemical Analysis, Linyi University, Linyi, 276005, P. R. China
| | - Xuemei Li
- Shandong Provincial Key Laboratory of Detection Technology for Tumor Markers, School of Chemistry and Chemical Engineering, Research Institute of Biochemical Analysis, Linyi University, Linyi, 276005, P. R. China.
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