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Rowe S, House JK, Zadoks RN. Milk as diagnostic fluid for udder health management. Aust Vet J 2024; 102:5-10. [PMID: 37798823 DOI: 10.1111/avj.13290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 09/10/2023] [Indexed: 10/07/2023]
Abstract
BACKGROUND Mastitis is the major disease affecting milk production of dairy cattle, and milk is an obvious substrate for the detection of both the inflammation and its causative infectious agents at quarter, cow, or herd levels. In this review, we examine the use of milk to detect inflammation based on somatic cell count (SCC) and other biomarkers, and for the detection of mastitis pathogens through culture-based and culture-free methods. FINDINGS The use of SCC at a cow or bulk milk level to guide udder health management in lactation is well-established, and SCC is increasingly used to guide selective dry cow treatment. Other markers of inflammation include electrical conductivity, which is used commercially, and markers of disease severity such as acute phase proteins but are not pathogen-specific. Some pathogen-specific markers based on humoral immune responses are available, but their value in udder health management is largely untested. Commercial pathogen detection is based on culture or polymerase chain reaction, with other tests, for example, loop-mediated isothermal amplification or 16S microbiome analysis still at the research or development stage. Matrix-assisted laser desorption ionisation time of flight (MALDI-ToF) is increasingly used for the identification of cultured organisms whilst application directly to milk needs further development. Details of test sensitivity, specificity, and use of the various technologies may differ between quarter, cow, and bulk milk applications. CONCLUSIONS There is a growing array of diagnostic assays that can be used to detect markers of inflammation or infection in milk. The value of some of these methods in on-farm udder health improvement programs is yet to be demonstrated whilst methods with proven value may be underutilised.
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Affiliation(s)
- S Rowe
- Sydney School of Veterinary Science, Faculty of Science, University of Sydney, Sydney, New South Wales, Australia
- Dairy UP, The University of Sydney, Camden, New South Wales, 2567, Australia
| | - J K House
- Sydney School of Veterinary Science, Faculty of Science, University of Sydney, Sydney, New South Wales, Australia
- Dairy UP, The University of Sydney, Camden, New South Wales, 2567, Australia
| | - R N Zadoks
- Sydney School of Veterinary Science, Faculty of Science, University of Sydney, Sydney, New South Wales, Australia
- Dairy UP, The University of Sydney, Camden, New South Wales, 2567, Australia
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2
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Rainard P, Gilbert FB, Germon P. Immune defenses of the mammary gland epithelium of dairy ruminants. Front Immunol 2022; 13:1031785. [PMID: 36341445 PMCID: PMC9634088 DOI: 10.3389/fimmu.2022.1031785] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 10/03/2022] [Indexed: 11/17/2022] Open
Abstract
The epithelium of the mammary gland (MG) fulfills three major functions: nutrition of progeny, transfer of immunity from mother to newborn, and its own defense against infection. The defense function of the epithelium requires the cooperation of mammary epithelial cells (MECs) with intraepithelial leucocytes, macrophages, DCs, and resident lymphocytes. The MG is characterized by the secretion of a large amount of a nutrient liquid in which certain bacteria can proliferate and reach a considerable bacterial load, which has conditioned how the udder reacts against bacterial invasions. This review presents how the mammary epithelium perceives bacteria, and how it responds to the main bacterial genera associated with mastitis. MECs are able to detect the presence of actively multiplying bacteria in the lumen of the gland: they express pattern recognition receptors (PRRs) that recognize microbe-associated molecular patterns (MAMPs) released by the growing bacteria. Interactions with intraepithelial leucocytes fine-tune MECs responses. Following the onset of inflammation, new interactions are established with lymphocytes and neutrophils recruited from the blood. The mammary epithelium also identifies and responds to antigens, which supposes an antigen-presenting capacity. Its responses can be manipulated with drugs, plant extracts, probiotics, and immune modifiers, in order to increase its defense capacities or reduce the damage related to inflammation. Numerous studies have established that the mammary epithelium is a genuine effector of both innate and adaptive immunity. However, knowledge gaps remain and newly available tools offer the prospect of exciting research to unravel and exploit the multiple capacities of this particular epithelium.
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Leimbach A, Poehlein A, Vollmers J, Görlich D, Daniel R, Dobrindt U. No evidence for a bovine mastitis Escherichia coli pathotype. BMC Genomics 2017; 18:359. [PMID: 28482799 PMCID: PMC5422975 DOI: 10.1186/s12864-017-3739-x] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2016] [Accepted: 04/27/2017] [Indexed: 11/30/2022] Open
Abstract
Background Escherichia coli bovine mastitis is a disease of significant economic importance in the dairy industry. Molecular characterization of mastitis-associated E. coli (MAEC) did not result in the identification of common traits. Nevertheless, a mammary pathogenic E. coli (MPEC) pathotype has been proposed suggesting virulence traits that differentiate MAEC from commensal E. coli. The present study was designed to investigate the MPEC pathotype hypothesis by comparing the genomes of MAEC and commensal bovine E. coli. Results We sequenced the genomes of eight E. coli isolated from bovine mastitis cases and six fecal commensal isolates from udder-healthy cows. We analyzed the phylogenetic history of bovine E. coli genomes by supplementing this strain panel with eleven bovine-associated E. coli from public databases. The majority of the isolates originate from phylogroups A and B1, but neither MAEC nor commensal strains could be unambiguously distinguished by phylogenetic lineage. The gene content of both MAEC and commensal strains is highly diverse and dominated by their phylogenetic background. Although individual strains carry some typical E. coli virulence-associated genes, no traits important for pathogenicity could be specifically attributed to MAEC. Instead, both commensal strains and MAEC have very few gene families enriched in either pathotype. Only the aerobactin siderophore gene cluster was enriched in commensal E. coli within our strain panel. Conclusions This is the first characterization of a phylogenetically diverse strain panel including several MAEC and commensal isolates. With our comparative genomics approach we could not confirm previous studies that argue for a positive selection of specific traits enabling MAEC to elicit bovine mastitis. Instead, MAEC are facultative and opportunistic pathogens recruited from the highly diverse bovine gastrointestinal microbiota. Virulence-associated genes implicated in mastitis are a by-product of commensalism with the primary function to enhance fitness in the bovine gastrointestinal tract. Therefore, we put the definition of the MPEC pathotype into question and suggest to designate corresponding isolates as MAEC. Electronic supplementary material The online version of this article (doi:10.1186/s12864-017-3739-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Andreas Leimbach
- Institute of Hygiene, University of Münster, Mendelstrasse 7, 48149, Münster, Germany. .,Department of Genomic and Applied Microbiology, Göttingen Genomics Laboratory, Institute of Microbiology and Genetics, Georg-August-University of Göttingen, Göttingen, Germany. .,Institute for Molecular Infection Biology, Julius-Maximilians-University of Würzburg, Würzburg, Germany.
| | - Anja Poehlein
- Department of Genomic and Applied Microbiology, Göttingen Genomics Laboratory, Institute of Microbiology and Genetics, Georg-August-University of Göttingen, Göttingen, Germany
| | - John Vollmers
- Leibniz Institute DSMZ, German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
| | - Dennis Görlich
- Institute of Biostatistics and Clinical Research, University of Münster, Münster, Germany
| | - Rolf Daniel
- Department of Genomic and Applied Microbiology, Göttingen Genomics Laboratory, Institute of Microbiology and Genetics, Georg-August-University of Göttingen, Göttingen, Germany
| | - Ulrich Dobrindt
- Institute of Hygiene, University of Münster, Mendelstrasse 7, 48149, Münster, Germany. .,Institute for Molecular Infection Biology, Julius-Maximilians-University of Würzburg, Würzburg, Germany.
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4
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Gogoi-Tiwari J, Williams V, Waryah CB, Costantino P, Al-Salami H, Mathavan S, Wells K, Tiwari HK, Hegde N, Isloor S, Al-Sallami H, Mukkur T. Mammary Gland Pathology Subsequent to Acute Infection with Strong versus Weak Biofilm Forming Staphylococcus aureus Bovine Mastitis Isolates: A Pilot Study Using Non-Invasive Mouse Mastitis Model. PLoS One 2017; 12:e0170668. [PMID: 28129375 PMCID: PMC5271311 DOI: 10.1371/journal.pone.0170668] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Accepted: 01/09/2017] [Indexed: 12/30/2022] Open
Abstract
Background Biofilm formation by Staphylococcus aureus is an important virulence attribute because of its potential to induce persistent antibiotic resistance, retard phagocytosis and either attenuate or promote inflammation, depending upon the disease syndrome, in vivo. This study was undertaken to evaluate the potential significance of strength of biofilm formation by clinical bovine mastitis-associated S. aureus in mammary tissue damage by using a mouse mastitis model. Methods Two S. aureus strains of the same capsular phenotype with different biofilm forming strengths were used to non-invasively infect mammary glands of lactating mice. Biofilm forming potential of these strains were determined by tissue culture plate method, ica typing and virulence gene profile per detection by PCR. Delivery of the infectious dose of S. aureus was directly through the teat lactiferous duct without invasive scraping of the teat surface. Both bacteriological and histological methods were used for analysis of mammary gland pathology of mice post-infection. Results Histopathological analysis of the infected mammary glands revealed that mice inoculated with the strong biofilm forming S. aureus strain produced marked acute mastitic lesions, showing profuse infiltration predominantly with neutrophils, with evidence of necrosis in the affected mammary glands. In contrast, the damage was significantly less severe in mammary glands of mice infected with the weak biofilm-forming S. aureus strain. Although both IL-1β and TNF-α inflammatory biomarkers were produced in infected mice, level of TNF-α produced was significantly higher (p<0.05) in mice inoculated with strong biofilm forming S. aureus than the weak biofilm forming strain. Conclusion This finding suggests an important role of TNF-α in mammary gland pathology post-infection with strong biofilm-forming S. aureus in the acute mouse mastitis model, and offers an opportunity for the development of novel strategies for reduction of mammary tissue damage, with or without use of antimicrobials and/or anti-inflammatory compounds for the treatment of bovine mastitis.
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Affiliation(s)
- Jully Gogoi-Tiwari
- School of Biomedical Sciences, Curtin Health Innovation Research Institute, Curtin University, Bentley, Perth, Western Australia, Australia
- College of Veterinary Sciences and Animal Husbandry, Central Agricultural University, Selesih, Aizawl, Mizoram, India
| | - Vincent Williams
- School of Biomedical Sciences, Curtin Health Innovation Research Institute, Curtin University, Bentley, Perth, Western Australia, Australia
| | - Charlene Babra Waryah
- School of Biomedical Sciences, Curtin Health Innovation Research Institute, Curtin University, Bentley, Perth, Western Australia, Australia
- Department of Medicine and Cell Biology, Albert Einstein College of Medicine, Bronx, New York, United States of America
| | - Paul Costantino
- School of Biomedical Sciences, Curtin Health Innovation Research Institute, Curtin University, Bentley, Perth, Western Australia, Australia
| | - Hani Al-Salami
- School of Pharmacy, Curtin Health Innovation Research Institute, Curtin University, Bentley, Perth, Western Australia, Australia
| | - Sangeetha Mathavan
- School of Pharmacy, Curtin Health Innovation Research Institute, Curtin University, Bentley, Perth, Western Australia, Australia
| | - Kelsi Wells
- School of Biomedical Sciences, Curtin Health Innovation Research Institute, Curtin University, Bentley, Perth, Western Australia, Australia
| | - Harish Kumar Tiwari
- School of Veterinary and Life Sciences, Murdoch University, Perth, Western Australia, Australia
| | | | - Shrikrishna Isloor
- Veterinary College, Karnataka Veterinary, Animal and Fisheries Sciences University, Bangalore, India
| | | | - Trilochan Mukkur
- School of Biomedical Sciences, Curtin Health Innovation Research Institute, Curtin University, Bentley, Perth, Western Australia, Australia
- * E-mail:
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Tassi R, McNeilly TN, Sipka A, Zadoks RN. Correlation of hypothetical virulence traits of two Streptococcus uberis strains with the clinical manifestation of bovine mastitis. Vet Res 2015; 46:123. [PMID: 26497306 PMCID: PMC4619225 DOI: 10.1186/s13567-015-0268-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Accepted: 10/07/2015] [Indexed: 11/10/2022] Open
Abstract
Streptococcus uberis is a common cause of clinical and subclinical mastitis in dairy cattle. Several virulence mechanisms have been proposed to contribute to the species' ability to cause disease. Here, virulence characteristics were compared between S. uberis strains FSL Z1-048, which consistently caused clinical mastitis in a challenge model, and FSL Z1-124, which consistently failed to cause disease in the same model, to ascertain whether in vitro virulence characteristics were related to clinical outcome. Macrophages derived from bovine blood monocytes failed to kill FSL Z1-048 whilst reducing survival of FSL Z1-124 by 42.5%. Conversely, blood derived polymorphonuclear cells caused more reduction (67.1 vs. 44.2%, respectively) in the survival of FSL Z1-048 than in survival of FSL Z1-124. After 3 h of coincubation with bovine mammary epithelial cell line BME-UV1, 1000-fold higher adherence was observed for FSL Z1-048 compared to FSL Z1-124, despite presence of a frame shift mutation in the sua gene of FSL Z1-048 that resulted in predicted truncation of the S. uberis Adhesion Molecule (SUAM) protein. In contrast, FSL Z1-124 showed higher ability than FSL Z1-048 to invade BME-UV1 cells. Finally, observed biofilm formation by FSL Z1-124 was significantly greater than for FSL Z1-048. In summary, for several hypothetical virulence characteristics, virulence phenotype in vitro did not match disease phenotype in vivo. Evasion of macrophage killing and adhesion to mammary epithelial cells were the only in vitro traits associated with virulence in vivo, making them attractive targets for further research into pathogenesis and control of S. uberis mastitis.
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Affiliation(s)
- Riccardo Tassi
- Moredun Research Institute, Pentlands Science Park, Bush Loan, Penicuik, EH26 0PZ, UK.
| | - Tom N McNeilly
- Moredun Research Institute, Pentlands Science Park, Bush Loan, Penicuik, EH26 0PZ, UK.
| | - Anja Sipka
- Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY, 14853, USA.
| | - Ruth N Zadoks
- Moredun Research Institute, Pentlands Science Park, Bush Loan, Penicuik, EH26 0PZ, UK. .,Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY, 14853, USA. .,Institute of Biodiversity, Animal Health and Comparative Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, G61 1QH, UK.
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6
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Benjamin A, Green B, Hayden L, Barlow J, Kerr D. Cow-to-cow variation in fibroblast response to a toll-like receptor 2/6 agonist and its relation to mastitis caused by intramammary challenge with Staphylococcus aureus. J Dairy Sci 2015; 98:1836-50. [DOI: 10.3168/jds.2014-9075] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Accepted: 12/01/2014] [Indexed: 12/11/2022]
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Green BB, McKay SD, Kerr DE. Age dependent changes in the LPS induced transcriptome of bovine dermal fibroblasts occurs without major changes in the methylome. BMC Genomics 2015; 16:30. [PMID: 25623529 PMCID: PMC4312471 DOI: 10.1186/s12864-015-1223-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Accepted: 01/05/2015] [Indexed: 11/15/2022] Open
Abstract
Background By comparing fibroblasts collected from animals at 5-months or 16-months of age we have previously found that the cultures from older animals produce much more IL-8 in response to lipopolysaccharide (LPS) stimulation. We now expand this finding by examining whole transcriptome differences in the LPS response between cultures from the same animals at different ages, and also investigate the contribution of DNA methylation to the epigenetic basis for the age-dependent increases in responsiveness. Results Age-dependent differences in IL-8 production by fibroblasts in response to LPS exposure for 24 h were abolished by pretreatment of cultures with a DNA demethylation agent, 5-aza-2′deoxycytidine (AZA). RNA-Seq analysis of fibroblasts collected from the same individuals at either 5 or 16 months of age and exposed in parallel to LPS for 0, 2, and 8 h revealed a robust response to LPS that was much greater in the cultures from older animals. Pro-inflammatory genes including IL-8, IL-6, TNF-α, and CCL20 (among many other immune associated genes), were more highly expressed (FDR < 0.05) in the 16-month old cultures following LPS exposure. Methylated CpG island recovery assay sequencing (MIRA-Seq) revealed numerous methylation peaks spread across the genome, combined with an overall hypomethylation of gene promoter regions, and a remarkable similarity, except for 20 regions along the genome, between the fibroblasts collected at the two ages from the same animals. Conclusions The fibroblast pro-inflammatory response to LPS increases dramatically from 5 to 16 months of age within individual animals. A better understanding of the mechanisms underlying this process could illuminate the physiological processes by which the innate immune response develops and possibly individual variation in innate immune response arises. In addition, although relatively unchanged by age, our data presents a general overview of the bovine fibroblast methylome as a guide for future studies in cattle epigenetics utilizing this cell type. Electronic supplementary material The online version of this article (doi:10.1186/s12864-015-1223-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Benjamin B Green
- Department of Animal Science, University of Vermont, Terrill Hall, 570 Main Street, Burlington, VT, 05405, USA.
| | - Stephanie D McKay
- Department of Animal Science, University of Vermont, Terrill Hall, 570 Main Street, Burlington, VT, 05405, USA.
| | - David E Kerr
- Department of Animal Science, University of Vermont, Terrill Hall, 570 Main Street, Burlington, VT, 05405, USA.
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8
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Suojala L, Kaartinen L, Pyörälä S. Treatment for bovine Escherichia coli mastitis - an evidence-based approach. J Vet Pharmacol Ther 2013; 36:521-31. [PMID: 23679229 DOI: 10.1111/jvp.12057] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2012] [Accepted: 04/19/2013] [Indexed: 11/30/2022]
Abstract
Bovine mastitis caused by Escherichia coli can range from being a subclinical infection of the mammary gland to a severe systemic disease. Cow-dependent factors such as lactation stage and age affect the severity of coliform mastitis. Evidence for the efficacy of antimicrobial treatment for E. coli mastitis is very limited. Antimicrobial resistance is generally not a limiting factor for treatment, but it should be monitored to detect changes in resistance profiles. The only antimicrobials for which there is some scientific evidence of beneficial effects in the treatment for E. coli mastitis are fluoroquinolones and cephalosporins. Both are critically important drugs, the use of which in animals destined for food should be limited to specific indications and should be based on bacteriological diagnosis. The suggested routine protocol in dairy herds could target the primary antimicrobial treatment for mastitis, specifically infections caused by gram-positive bacteria. In E. coli mastitis with mild to moderate clinical signs, a non-antimicrobial approach (anti-inflammatory treatment, frequent milking and fluid therapy) should be the first option. In cases of severe E. coli mastitis, parenteral administration of fluoroquinolones, or third- or fourth-generation cephalosporins, is recommended due to the risk of unlimited growth of bacteria in the mammary gland and ensuing bacteremia. Evidence for the efficacy of intramammary-administered antimicrobial treatment for E. coli mastitis is so limited that it cannot be recommended. Nonsteroidal anti-inflammatory drugs have documented the efficacy in the treatment for E. coli mastitis and are recommended for supportive treatment for clinical mastitis.
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Affiliation(s)
- L Suojala
- Department of Production Animal Medicine, Faculty of Veterinary Medicine, University of Helsinki, Saarentaus, Finland
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9
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Khatun M, Sørensen P, Jørgensen HBH, Sahana G, Sørensen LP, Lund MS, Ingvartsen KL, Buitenhuis AJ, Vilkki J, Bjerring M, Thomasen JR, Røntved CM. Effects of Bos taurus autosome 9-located quantitative trait loci haplotypes on the disease phenotypes of dairy cows with experimentally induced Escherichia coli mastitis. J Dairy Sci 2013; 96:1820-33. [PMID: 23357017 DOI: 10.3168/jds.2012-5528] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2012] [Accepted: 11/28/2012] [Indexed: 01/08/2023]
Abstract
Several quantitative trait loci (QTL) affecting mastitis incidence and mastitis-related traits such as somatic cell score exist in dairy cows. Previously, QTL haplotypes associated with susceptibility to Escherichia coli mastitis in Nordic Holstein-Friesian (HF) cows were identified on Bos taurus autosome 9. In the present study, we induced experimental E. coli mastitis in Danish HF cows to investigate the effect of 2 E. coli mastitis-associated QTL haplotypes on the cows' disease phenotypes and recovery in early lactation. Thirty-two cows were divided in 2 groups bearing haplotypes with either low (HL) or high (HH) susceptibility to E. coli. In addition, biopsies (liver and udder) were collected from half of the cows (n=16), resulting in a 2 × 2 factorial design, with haplotype being one factor (HL vs. HH) and biopsy being the other factor (biopsies vs. no biopsies). Each cow was inoculated with a low E. coli dose (20 to 40 cfu) in one front quarter at time 0 h. Liver biopsies were collected at -144, 12, 24, and 192 h; udder biopsies were collected at 24h and 192 h post-E. coli inoculation. The clinical parameters: feed intake, milk yield, body temperature, heart rate, respiration rate, rumen motility; and the paraclinical parameters: bacterial counts, somatic cell count (SCC), and milk amyloid A levels in milk; and white blood cell count, polymorphonuclear neutrophilic leukocyte (PMNL) count, and serum amyloid A levels in blood were recorded at different time points post-E. coli inoculation. Escherichia coli inoculation changed the clinical and paraclinical parameters in all cows except one that was not infected. Clinically, the HH group tended to have higher body temperature and heart rate than the HL group did. Paraclinically, the HL group had faster PMNL recruitment and SCC recovery than the HH group did. However, we also found interactions between the effects of haplotype and biopsy for body temperature, heart rate, and PMNL. In conclusion, when challenged with E. coli mastitis, HF cows with the specific Bos taurus autosome 9-located QTL haplotypes were associated with differences in leukocyte kinetics, with low-susceptibility cows having faster blood PMNL recruitment and SCC recovery and a tendency for a milder clinical response than the high-susceptibility cows did.
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Affiliation(s)
- M Khatun
- Department of Animal Science, Department of Molecular Biology and Genetics, Faculty of Science and Technology, Aarhus University, PO Box 50, DK-8300 Tjele, Denmark
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Kandasamy S, Kerr DE. Genomic analysis of between-cow variation in dermal fibroblast response to lipopolysaccharide. J Dairy Sci 2012; 95:3852-64. [PMID: 22720940 DOI: 10.3168/jds.2011-5251] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2011] [Accepted: 02/26/2012] [Indexed: 01/01/2023]
Abstract
The innate immune response plays a major role in defense against mastitis-causing pathogens. Identification of existing variation in innate immune signaling among cows and the underlying molecular causes for the variation may help in design of new mastitis control strategies. The dermal fibroblast has been used as a model cell type to explore between-cow variation in the ability of cells to produce IL-8 in response to lipopolysaccharide (LPS) treatment, and this response appears related to an animal's ability to respond to in vivo challenge with LPS or Escherichia coli mastitis. In this study, primary dermal fibroblast cultures of cows and microarray-based genomic analysis were used to investigate the cause(s) for the variable response to LPS. Fibroblast cultures from 2 cows, one with a low response phenotype (LR(array)) and another with a high response phenotype (HR(array)), were selected from our collection of fibroblast cultures established from 88 cows. The LR(array) fibroblast culture produced approximately 5-fold less IL-8 and IL-6 protein in response to 24-h LPS treatment than the HR(array) fibroblast culture. Genomic analysis of RNA obtained from 3 replicates of the 2 cultures before and after 8-h LPS treatment revealed a combined LPS-induced differential expression of 321 transcripts, indicating the robust response capability of the fibroblast cell. Under basal conditions, the microarray analysis revealed 2-fold less expression of toll-like receptor 4 (TLR4) in the LR(array) fibroblasts compared with the HR(array) fibroblasts, and this was associated with a marked reduction in expression of genes regulated by the TLR4-MyD88-dependent and TLR4-TRIF-dependent pathways (IL-8, IL-6, SAA3, CCL20, MX1, IRF1, and ISG20). The between-culture differential expression of TLR4 was confirmed and extended by quantitative PCR analysis (QPCR) that revealed a 33-fold lower expression of TLR4 in the LR(array) fibroblast culture. After LPS treatment, the difference in TLR4 expression increased to almost 50-fold and was associated with more than 8-fold lower expression of IL-8 and IL-6. No DNA sequence variations were identified in the proximal 1,300-bp promoter region of the TLR4 gene, and microarray analysis did not reveal a molecular explanation for the reduced TLR4 expression under either basal conditions or following exposure to LPS. The attenuated innate immune response of the LR(array) fibroblast culture to LPS may be caused by reduced TLR4 receptor expression. Also, the primary dermal fibroblast cells can be used to examine underlying causes for between-cow variations in key immune response pathways.
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Affiliation(s)
- S Kandasamy
- Department of Animal Science, College of Agriculture and Life Sciences, University of Vermont, Burlington 05405, USA
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11
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Kandasamy S, Green B, Benjamin A, Kerr D. Between-cow variation in dermal fibroblast response to lipopolysaccharide reflected in resolution of inflammation during Escherichia coli mastitis. J Dairy Sci 2011; 94:5963-75. [DOI: 10.3168/jds.2011-4288] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2011] [Accepted: 08/09/2011] [Indexed: 11/19/2022]
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Lippolis JD, Reinhardt TA. Utility, limitations, and promise of proteomics in animal science. Vet Immunol Immunopathol 2010; 138:241-51. [PMID: 21074277 DOI: 10.1016/j.vetimm.2010.10.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Proteomics experiments have the ability to simultaneously identify and quantify thousands of proteins in one experiment. The use of this technology in veterinary/animal science is still in its infancy, yet it holds significant promise as a method for advancing veterinary/animal science research. Examples of current experimental designs and capabilities of proteomic technology and basic principles of mass spectrometry are discussed. In addition, challenges and limitations of proteomics are presented, stressing those that are unique to veterinary/animal sciences.
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Affiliation(s)
- John D Lippolis
- Ruminant Diseases and Immunology Research Unit, USDA-ARS, National Animal Disease Center, 1920 Dayton Avenue, Ames, IA 50010, United States.
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13
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White LJ, Schukken YH, Dogan B, Green L, Döpfer D, Chappell MJ, Medley GF. Modelling the dynamics of intramammary E. coli infections in dairy cows: understanding mechanisms that distinguish transient from persistent infections. Vet Res 2009; 41:13. [PMID: 19840536 PMCID: PMC2789329 DOI: 10.1051/vetres/2009061] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2009] [Accepted: 10/15/2009] [Indexed: 01/23/2023] Open
Abstract
The majority of intramammary infections with Escherichia coli in dairy cows result in transient infections with duration of about 10 days or less, although more persistent infections (2 months or longer) have been identified. We apply a mathematical model to explore the role of an intracellular mammary epithelial cell reservoir in the dynamics of infection. We included biological knowledge of the bovine immune response and known characteristics of the bacterial population in both transient and persistent infections. The results indicate that varying the survival duration of the intracellular reservoir reproduces the data for both transient and persistent infections. Survival in an intracellular reservoir is the most likely mechanism that ensures persistence of E. coli infections in mammary glands. Knowledge of the pathogenesis of persistent infections is essential to develop preventive and treatment programmes for these important infections in dairy cows.
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Affiliation(s)
- Lisa J White
- Mahidol Oxford Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.
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14
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Lippolis JD, Bayles DO, Reinhardt TA. Proteomic Changes in Escherichia coli When Grown in Fresh Milk versus Laboratory Media. J Proteome Res 2008; 8:149-58. [DOI: 10.1021/pr800458v] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- John D. Lippolis
- Periparturient Diseases of Cattle Research Unit, and Bacterial Diseases of Livestock Research Unit, USDA-ARS, National Animal Disease Center, Ames, Iowa 50010
| | - Darrell O. Bayles
- Periparturient Diseases of Cattle Research Unit, and Bacterial Diseases of Livestock Research Unit, USDA-ARS, National Animal Disease Center, Ames, Iowa 50010
| | - Timothy A. Reinhardt
- Periparturient Diseases of Cattle Research Unit, and Bacterial Diseases of Livestock Research Unit, USDA-ARS, National Animal Disease Center, Ames, Iowa 50010
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15
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Shojaei Z, Yadollahi A. Physicochemical and Microbiological Quality of Raw, Pasteurized and UHT Milks in Shops. ACTA ACUST UNITED AC 2008. [DOI: 10.3923/ajsr.2008.532.538] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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16
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Blum S, Heller ED, Krifucks O, Sela S, Hammer-Muntz O, Leitner G. Identification of a bovine mastitis Escherichia coli subset. Vet Microbiol 2008; 132:135-48. [PMID: 18571344 DOI: 10.1016/j.vetmic.2008.05.012] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2008] [Revised: 05/05/2008] [Accepted: 05/09/2008] [Indexed: 11/29/2022]
Abstract
Eleven Escherichia coli isolates from clinical bovine mastitis cases (mastitic strains) and 11 from the cowshed environment (environmental strains) were compared, to determine if the former were a subset of the latter. The mastitic and environmental strains could not be distinguished according to O antigen and antibiotic sensitivity. All mastitic isolates showed significantly (P<0.0001) faster growth in milk and faster lactose fermentation than most (approximately 64%) environmental strains, but growth rates in nutrient broth did not differ. The rates of lactose fermentation and growth in milk were positively correlated. Adhesion and phagocytosis of mastitic strains by bovine PMN were significantly (P<0.0001) lower than those of environmental strains, and correlated negatively with growth in milk and lactose fermentation. The average percentages of killing by bovine leukocytes in the two sources were not statistically different. All mastitic strains were serum sensitive, whereas most ( approximately 72%) environmental ones were resistant. Finally, pulse-field gel electrophoresis revealed two main pulse type clusters, sharing a similarity coefficient of 79%. Cluster 1 comprised only environmental strains, whereas cluster 2 comprised mostly mastitic strains and only three environmental ones. Four mastitic strains shared a similarity coefficient of less than 74% with the other strains and were not included in the clusters. Our results suggest that clinical bovine mastitis E. coli isolates may form a subset of the general environmental E. coli population; they seem better able to multiply in the udder medium and to evade the host cellular innate immune response, and are genetically distinct from most environmental strains.
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Affiliation(s)
- S Blum
- National Mastitis Reference Center, Division of Bacteriology, Kimron Veterinary Institute, Ministry of Agriculture & Rural Development, Bet Dagan, Israel
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17
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Shpigel NY, Elazar S, Rosenshine I. Mammary pathogenic Escherichia coli. Curr Opin Microbiol 2008; 11:60-5. [PMID: 18291708 DOI: 10.1016/j.mib.2008.01.004] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2007] [Revised: 01/04/2008] [Accepted: 01/18/2008] [Indexed: 10/22/2022]
Abstract
Pathogenic Escherichia coli can be classified into several pathotypes, and it is believed that each pathotype carries one or more specific gene repertoire (or virulence factors combination) that distinguishes them from non-pathogenic E. coli strains and from other pathotypes. In contrast to this notion, it was proposed that this is not the case for E. coli mastitis, a common disease in farm animals and that any given E. coli isolate can cause this disease, even strains that are considered non-pathogenic. In this review we will re-examine this latter concept and recent advances in the study E. coli mastitis.
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Affiliation(s)
- Nahum Y Shpigel
- The Koret School of Veterinary Medicine, Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot, Israel.
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18
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Abstract
Mastitis, an inflammatory reaction of the mammary gland that is usually caused by a microbial infection, is recognized as the most costly disease in dairy cattle. Decreased milk production accounts for approximately 70% of the total cost of mastitis. Mammary tissue damage reduces the number and activity of epithelial cells and consequently contributes to decreased milk production. Mammary tissue damage has been shown to be induced by either apoptosis or necrosis. These 2 distinct types of cell death can be distinguished by morphological, biochemical, and molecular changes in dying cells. Both bacterial factors and host immune reactions contribute to epithelial tissue damage. During infection of the mammary glands, the tissue damage can initially be caused by bacteria and their products. Certain bacteria produce toxins that destroy cell membranes and damage milk-producing tissue, whereas other bacteria are able to invade and multiply within the bovine mammary epithelial cells before causing cell death. In addition, mastitis is characterized by an influx of somatic cells, primarily polymorphonuclear neutrophils, into the mammary gland. With more immune cells migrating into the mammary gland and the breakdown of the blood-milk barrier, damage to the mammary epithelium worsens. It is well known that breakdown of the extracellular matrix can lead to death of the epithelial cells. Meanwhile, polymorphonuclear neutrophils can harm the mammary tissue by releasing reactive oxygen intermediates and proteolytic enzymes. In vitro and in vivo studies suggest that the use of antioxidants and other protective compounds in mastitis control programs is worth investigating, because they may aid in alleviating damage to secretory cells and thus reduce subsequent milk loss.
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Affiliation(s)
- X Zhao
- Department of Animal Science, McGill University, Ste. Anne de Bellevue, Québec, H9X 3V9, Canada.
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19
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Rainard P, Riollet C. Innate immunity of the bovine mammary gland. Vet Res 2006; 37:369-400. [PMID: 16611554 DOI: 10.1051/vetres:2006007] [Citation(s) in RCA: 329] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2005] [Accepted: 10/19/2005] [Indexed: 11/14/2022] Open
Abstract
Understanding the immune defenses of the mammary gland is instrumental in devising and developing measures to control mastitis, the major illness of dairy ruminants. Innate immunity is an extremely broad field for investigation, and despite decades of research, our present knowledge of the innate defenses of the udder is incomplete. Yet, information is being gained on the recognition of pathogens by the mammary gland, and on several locally inducible defenses. The contribution of mammary epithelial cells to local defenses and to the mobilization of leucocytes is under growing scrutiny. Interactions of mastitis-causing bacteria such as Escherichia coli or Staphylococcus aureus and the mammary gland represents a suitable model for studies on innate immunity at an epithelium frontier. Powerful new research tools are radically modifying the prospects for the understanding of the interplay between the mammary gland innate defenses and mastitis-causing bacteria: genetic dissection of the immune response, microarray gene technology, transcriptomic methodologies and gene silencing by RNA interference will make possible the discovery of several of the key defense mechanisms which govern the susceptibility/resistance to mastitis at the molecular and genetic levels. It should then be possible to enhance the resistance of dairy ruminants to mastitis through immunomodulation and genetic improvement.
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Affiliation(s)
- Pascal Rainard
- Laboratoire de Pathologie Infectieuse et Immunologie, Institut National de la Recherche Agronomique, 37380 Nouzilly, France.
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20
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Haddadi K, Moussaoui F, Hebia I, Laurent F, Le Roux Y. E. coliproteolytic activity in milk and casein breakdown. ACTA ACUST UNITED AC 2005; 45:485-96. [PMID: 16045896 DOI: 10.1051/rnd:2005033] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Previous studies have focused on both LPS and E. coli experimental mastitis and underlined the respective roles of endogenous proteolysis (including plasmin from the blood stream and other proteases from milk leukocytes), as well as the presence of E. coli in a more intricate system. The aim of this study was to assess the role of E. coli in milk proteolysis and especially that of its proteases in casein breakdown. The first part consisted in the incubation of 104 cfu.mL(-1) of the E. coli strain in raw milk at 37 degrees C for 24 h; the same milk was also incubated with 0.04% sodium azide. Several parameters were evaluated: CFU, plasmin activity, gelatinase activity and pH 4.6 insoluble peptides, including the proportion of gamma-CN. The profile of gelatinase activity was determined by zymography and identified by immunoblotting. In the second part of the study, we examined the profile of CN (alphas-, beta- and kappa-CN) breakdown by E. coli lysate. The results suggest that E. coli proteases have a direct effect on CN, and the increase of gamma-CN in inoculated milk may be generated by both plasmin and the gelatinase. Moreover, the gelatinase activity in the inoculated milk was higher after 24 h of incubation.
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Affiliation(s)
- Kahina Haddadi
- Laboratoire de Sciences Animales, UC INRA 12 340, Ecole Nationale Supérieure d'Agronomie et des Industries Alimentaires (ENSAIA), BP 172, Vandoeuvre-Lès-Nancy, France.
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