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  1. Article ; Online: Research Note: Bovine lactoferrin in chickens: an investigation into its viability as an antibiotic alternative.

    Wong, Theresa W / Rai, Vikrant / Dong, Fanglong / Tkalcic, Suzana / Aguilar, Jose Santiago / Dawes, Maisie E

    Poultry science

    2024  Volume 103, Issue 6, Page(s) 103658

    Abstract: Finding effective antibiotic alternatives is crucial to managing the re-emerging health risk of Clostridium perfringens (CP) type A/G-induced avian necrotic enteritis (NE), a disease that has regained prominence in the wake of governmental restrictions ... ...

    Abstract Finding effective antibiotic alternatives is crucial to managing the re-emerging health risk of Clostridium perfringens (CP) type A/G-induced avian necrotic enteritis (NE), a disease that has regained prominence in the wake of governmental restrictions on antibiotic use in poultry. Known for its antimicrobial and immunomodulatory effects, the use of bovine lactoferrin (bLF) in chickens is yet to be fully explored. In this study, we hypothesized that bLF can accumulate in the small intestines of healthy chickens through gavage and intramuscular supplementation and serves as a potential antibiotic alternative. Immunohistochemistry located bLF in various layers of the small intestines and ELISA testing confirmed its accumulation. Surprisingly, sham-treated chickens also showed the presence of bLF, prompting a western blotting analysis that dismissed the notion of cross-reactivity between bLF and the avian protein ovotransferrin. Although the significance of the route of administration remains inconclusive, this study supports the hypothesis that bLF is a promising and safe antibiotic alternative with demonstrated resistance to the degradative environment of the chicken intestines. Further studies are needed to determine its beneficial pharmacological effects in CP-infected chickens.
    Language English
    Publishing date 2024-03-14
    Publishing country England
    Document type Journal Article
    ZDB-ID 242586-5
    ISSN 1525-3171 ; 0032-5791
    ISSN (online) 1525-3171
    ISSN 0032-5791
    DOI 10.1016/j.psj.2024.103658
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: What Is Your Diagnosis?

    Dawes, Maisie E / Britt, Lisa G / Jones, Bradley T / Shuck, Karen K / Eng, Curtis L / Memarzadeh, Amanda / Ondrak, Jeff D

    Journal of the American Veterinary Medical Association

    2022  Volume 260, Issue 4, Page(s) 401–403

    MeSH term(s) Animal Diseases/diagnosis ; Animals ; Diagnosis, Differential
    Language English
    Publishing date 2022-02-10
    Publishing country United States
    Document type Journal Article
    ZDB-ID 390811-2
    ISSN 1943-569X ; 0003-1488
    ISSN (online) 1943-569X
    ISSN 0003-1488
    DOI 10.2460/javma.20.11.0631
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Dramatic differences in the response of macrophages from B2 and B19 MHC-defined haplotypes to interferon gamma and polyinosinic:polycytidylic acid stimulation.

    Dawes, Maisie E / Griggs, Lisa M / Collisson, Ellen W / Briles, Worthie E / Drechsler, Yvonne

    Poultry science

    2014  Volume 93, Issue 4, Page(s) 830–838

    Abstract: The chicken MHC has been associated with disease resistance, though the mechanisms are not understood. The functions of macrophages, critical to both innate and acquired immunity, were compared between the more infectious bronchitis virus-resistant B2 ... ...

    Abstract The chicken MHC has been associated with disease resistance, though the mechanisms are not understood. The functions of macrophages, critical to both innate and acquired immunity, were compared between the more infectious bronchitis virus-resistant B2 and the more infectious bronchitis virus-susceptible B19 lines. In vivo peripheral blood concentrations of monocytes were similar in B2 or B19 homozygous haplotypes. Peripheral blood-derived macrophages were stimulated with poly I:C, simulating an RNA virus, or IFNγ, a cytokine at the interface of innate and adaptive immunity. Not only did B2-derived peripheral monocytes differentiate into macrophages more readily than the B19 monocytes, but as determined by NO production, macrophages from B2 and B2 on B19 genetic background chicks were also significantly more responsive to either stimulant. In conclusion, the correlation with resistance to illness following viral infection may be directly linked to a more vigorous innate immune response.
    MeSH term(s) Adaptive Immunity ; Animals ; Cell Differentiation ; Cells, Cultured ; Chickens/genetics ; Chickens/immunology ; Coronavirus Infections/veterinary ; Coronavirus Infections/virology ; Disease Resistance ; Haplotypes ; Immunity, Innate ; Infectious bronchitis virus/physiology ; Interferon-gamma/administration & dosage ; Macrophages/immunology ; Macrophages/metabolism ; Major Histocompatibility Complex ; Monocytes/cytology ; Monocytes/metabolism ; Poly I-C/administration & dosage ; Poultry Diseases/virology
    Chemical Substances Interferon-gamma (82115-62-6) ; Poly I-C (O84C90HH2L)
    Keywords covid19
    Language English
    Publishing date 2014-04-04
    Publishing country England
    Document type Journal Article ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 242586-5
    ISSN 1525-3171 ; 0032-5791
    ISSN (online) 1525-3171
    ISSN 0032-5791
    DOI 10.3382/ps.2013-03511
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: In vitro effects of lactoferrin on lipopolysaccharide-induced proliferation, gene expression, and prostanoid production by bovine peripheral blood mononuclear cells

    Dawes, Maisie E / Tyler, Jeff W / Marsh, Antoinette E / Larson, Robert L / Steevens, Barry J / Lakritz, Jeffrey

    American journal of veterinary research. 2008 Sept., v. 69, no. 9

    2008  

    Keywords cattle ; veterinary drugs ; antimicrobial agents ; immunostimulants ; lactoferrin ; medicinal properties ; inflammation ; in vitro studies ; blood ; lipopolysaccharides ; blood cells ; cell proliferation ; gene expression ; prostaglandins ; prostaglandin synthase ; metalloproteinases ; therapeutics ; neonates ; endotoxemia
    Language English
    Dates of publication 2008-09
    Size p. 1164-1170.
    Document type Article
    ZDB-ID 390796-x
    ISSN 1943-5681 ; 0002-9645
    ISSN (online) 1943-5681
    ISSN 0002-9645
    Database NAL-Catalogue (AGRICOLA)

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  5. Article: Effect of delayed colostrum collection on colostral IgG concentration in dairy cows.

    Moore, Malantus / Tyler, Jeff W / Chigerwe, Munashe / Dawes, Maisie E / Middleton, John R

    Journal of the American Veterinary Medical Association

    2005  Volume 226, Issue 8, Page(s) 1375–1377

    Abstract: Objective: To determine the effect of timing of first-milking colostrum collection on colostral IgG concentration.: Design: Prospective study.: Animals: 13 healthy Holstein cows.: Procedures: All calvings were observed. After parturition, ... ...

    Abstract Objective: To determine the effect of timing of first-milking colostrum collection on colostral IgG concentration.
    Design: Prospective study.
    Animals: 13 healthy Holstein cows.
    Procedures: All calvings were observed. After parturition, calves were not allowed to suckle and were separated from the dam. Colostrum was collected from a single randomly selected quarter at 2, 6, 10, and 14 hours after parturition until all 4 quarters were sampled. Colostral IgG concentration was determined via radial immunodiffusion.
    Results: Mean colostral IgG concentration was 113, 94, 82, and 76 g/L at 2, 6, 10, and 14 hours after calving, respectively. Colostrum collected 6, 10, and 14 hours after calving had significantly lower IgG concentrations than did colostrum collected 2 hours after calving. Mean colostral IgG concentration at 14 hours after calving was significantly lower than that at 6 hours after calving. Cows in their third or greater lactation had mean colostral IgG concentrations 2 hours after calving (132 g/L) that were greater than the first and second lactation cows (mean, 95 and 100 g/L, respectively).
    Conclusions and clinical relevance: Results indicate that early or immediate colostrum collection from dairy cows will maximize colostral IgG concentration. Adjustment of routine dairy farm management procedures may be required to maximize colostrum quality and minimize prevalence of failure of passive transfer in dairy calves.
    MeSH term(s) Animals ; Cattle/physiology ; Colostrum/immunology ; Female ; Immunodiffusion/methods ; Immunodiffusion/veterinary ; Immunoglobulin G/analysis ; Immunoglobulin G/immunology ; Lactation/immunology ; Lactation/physiology ; Prospective Studies ; Time Factors
    Chemical Substances Immunoglobulin G
    Language English
    Publishing date 2005-04-09
    Publishing country United States
    Document type Comparative Study ; Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 390811-2
    ISSN 1943-569X ; 0003-1488
    ISSN (online) 1943-569X
    ISSN 0003-1488
    DOI 10.2460/javma.2005.226.1375
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: In vitro effects of lactoferrin on lipopolysaccharide-induced proliferation, gene expression, and prostanoid production by bovine peripheral blood mononuclear cells.

    Dawes, Maisie E / Tyler, Jeff W / Marsh, Antoinette E / Larson, Robert L / Steevens, Barry J / Lakritz, Jeffrey

    American journal of veterinary research

    2008  Volume 69, Issue 9, Page(s) 1164–1170

    Abstract: Objective: To evaluate the effect of lactoferrin on lipopolysaccharide (LPS)-induced proliferation of bovine peripheral blood mononuclear cells (PBMCs), gene expression of inflammatory mediators, and production of prostanoids in vitro.: Sample ... ...

    Abstract Objective: To evaluate the effect of lactoferrin on lipopolysaccharide (LPS)-induced proliferation of bovine peripheral blood mononuclear cells (PBMCs), gene expression of inflammatory mediators, and production of prostanoids in vitro.
    Sample population: PBMCs isolated from 15 Holstein bull calves.
    Procedures: Mixed populations of PBMCs were isolated by differential centrifugation. Proliferation assays were conducted in 96-well plates designed to allow addition of lactoferrin (200 ng/mL) with and without LPS (1 microg/mL) in a checkerboard design. Incorporation of 3H-thymidine was used to determine proliferation of PBMCs. Prostaglandin E2 production was determined in culture-conditioned medium by use of enzyme immunoassay. Effects of lactoferrin on LPS-induced gene expression of cyclooxygenase (COX)-2 and matrix metalloproteinase (MMP)-9 were monitored by use of PCR assays.
    Results: Lactoferrin supplementation significantly reduced LPS-induced incorporation of 3H-thymidine and production of prostaglandin E2 by PBMCs. Lactoferrin reduced LPS-induced expression of COX-2 and MMP-9 mRNA.
    Conclusions and clinical relevance: Lactoferrin reduced LPS-induced cellular proliferation, inflammatory mediator gene expression, and prostaglandin E2 production by bovine PBMCs in vitro. These effects may be beneficial in reducing the impact of endotoxemia in neonates.
    MeSH term(s) Animals ; Cattle/physiology ; Cell Count ; Cell Proliferation/drug effects ; Cell Survival/drug effects ; Cells, Cultured ; Cyclooxygenase 2/genetics ; Dinoprostone/biosynthesis ; Gene Expression Regulation/drug effects ; Lactoferrin/pharmacology ; Leukocytes, Mononuclear/cytology ; Leukocytes, Mononuclear/drug effects ; Leukocytes, Mononuclear/metabolism ; Lipopolysaccharides/pharmacology ; Male ; Thymidine/metabolism ; Tritium/metabolism
    Chemical Substances Lipopolysaccharides ; Tritium (10028-17-8) ; Cyclooxygenase 2 (EC 1.14.99.1) ; Lactoferrin (EC 3.4.21.-) ; Dinoprostone (K7Q1JQR04M) ; Thymidine (VC2W18DGKR)
    Language English
    Publishing date 2008-09
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 390796-x
    ISSN 1943-5681 ; 0002-9645
    ISSN (online) 1943-5681
    ISSN 0002-9645
    DOI 10.2460/ajvr.69.9.1164
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Evaluation of a commercially available immunoassay for assessing adequacy of passive transfer in calves.

    Dawes, Maisie E / Tyler, Jeff W / Hostetler, Douglas / Lakritz, Jeff / Tessman, Ronald

    Journal of the American Veterinary Medical Association

    2002  Volume 220, Issue 6, Page(s) 791–793

    Abstract: Objective: To evaluate diagnostic utility of a commercially available immunoassay for assessing adequacy of passive transfer of immunity in neonatal calves.: Design: Prospective study.: Animals: 123 calves.: Procedure: Blood and serum samples ... ...

    Abstract Objective: To evaluate diagnostic utility of a commercially available immunoassay for assessing adequacy of passive transfer of immunity in neonatal calves.
    Design: Prospective study.
    Animals: 123 calves.
    Procedure: Blood and serum samples were obtained from the calves prior to 2 weeks of age. The immunoassay was performed, along with refractometry and an 18% sodium sulfite turbidity test. Serum IgG concentration was determined with a radial immunodiffusion assay. Sensitivity and specificity of the immunoassay, refractometry, and the sodium sulfite test were calculated by comparing results with results of the radial immunodiffusion assay.
    Results: Sensitivity and specificity of the blood IgG immunoassay were 0.93 and 0.88, respectively, compared with 1.00 and 0.53 for the sodium sulfite test. For refractometry, sensitivity and specificity were 0.71 and 0.83, respectively, when a serum total solids concentration of 5.2 g/dl was used as the cutoff between positive and negative test results.
    Conclusions and clinical relevance: Results suggest that the immunoassay performs well in detecting calves with inadequate passive transfer of immunity.
    MeSH term(s) Animals ; Animals, Newborn/blood ; Animals, Newborn/immunology ; Cattle/blood ; Cattle/immunology ; Immunity, Maternally-Acquired ; Immunoassay/standards ; Immunoassay/veterinary ; Immunodiffusion/veterinary ; Immunoglobulin G/blood ; Nephelometry and Turbidimetry/veterinary ; Prospective Studies ; Reagent Kits, Diagnostic/standards ; Reagent Kits, Diagnostic/veterinary ; Refractometry/veterinary ; Sensitivity and Specificity ; Sulfites
    Chemical Substances Immunoglobulin G ; Reagent Kits, Diagnostic ; Sulfites ; sodium sulfite (VTK01UQK3G)
    Language English
    Publishing date 2002-03-15
    Publishing country United States
    Document type Comparative Study ; Evaluation Studies ; Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 390811-2
    ISSN 1943-569X ; 0003-1488
    ISSN (online) 1943-569X
    ISSN 0003-1488
    DOI 10.2460/javma.2002.220.791
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: Enteral feeding of 3 mature cows by rumenostomy.

    Chigerwe, Munashe / Tyler, Jeff W / Dawes, Maisie E / Nagy, Dusty W / Schultz, Loren G / Luby, Christopher D / Middleton, John R / Gourley, David

    Journal of veterinary internal medicine

    2005  Volume 19, Issue 5, Page(s) 779–781

    MeSH term(s) Animals ; Cattle ; Cattle Diseases/surgery ; Cattle Diseases/therapy ; Enteral Nutrition/methods ; Enteral Nutrition/veterinary ; Female ; Rumen/surgery ; Treatment Outcome
    Language English
    Publishing date 2005-10-07
    Publishing country United States
    Document type Case Reports ; Journal Article
    ZDB-ID 92798-3
    ISSN 1939-1676 ; 0891-6640
    ISSN (online) 1939-1676
    ISSN 0891-6640
    DOI 10.1892/0891-6640(2005)19[779:efomcb]2.0.co;2
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: Evaluation of a cow-side immunoassay kit for assessing IgG concentration in colostrum.

    Chigerwe, Munashe / Dawes, Maisie E / Tyler, Jeff W / Middleton, John R / Moore, Malantus P / Nagy, Dusty M

    Journal of the American Veterinary Medical Association

    2005  Volume 227, Issue 1, Page(s) 129–131

    Abstract: Objective: To determine sensitivity and specificity of a cow-side immunoassay kit for assessing IgG concentration in colostrum.: Design: Prospective study.: Animals: 76 dairy and 11 beef cows of various parities.: Procedure: Colostrum from ... ...

    Abstract Objective: To determine sensitivity and specificity of a cow-side immunoassay kit for assessing IgG concentration in colostrum.
    Design: Prospective study.
    Animals: 76 dairy and 11 beef cows of various parities.
    Procedure: Colostrum from first, second, and third milkings and milk samples were collected, and IgG concentration was determined by means of radial immunodiffusion. The immunoassay was performed according to the manufacturer's instructions, and sensitivity and specificity were calculated by comparing results of the immunoassay (positive vs negative) with results of immunodiffusion (< 50 g/L vs > or = 50 g/L).
    Results: 135 colostrum or milk samples were collected. Mean +/- SD colostral IgG concentrations, determined by means of radial immunodiffusion for dairy and beef cows were 65.4 +/- 51.4 g/L and 114.8 +/- 42.7 g/L, respectively. Mean IgG concentrations for first-, second-, and third-milking colostrum samples and for milk samples were 92 +/- 49.0 g/L, 74.6 +/- 45.1 g/L, 47.5 +/- 32 g/L, and 6.8 +/- 3.8 g/L, respectively. Sensitivity of the immunoassay (ie, percentage of samples with IgG concentration < 50 g/L with a positive immunoassay result) was 93%, and specificity (ie, percentage of samples with IgG concentration > or = 50 g/L with a negative immunoassay result) was 76%.
    Conclusions and clinical relevance: Results suggested that the immunoassay kit was an acceptable cow-side test to identify colostrum samples with IgG concentrations < 50 g/L. The immunoassay kit should be useful in screening colostrum for adequate IgG concentration before feeding to calves or storage.
    MeSH term(s) Animals ; Cattle/immunology ; Cattle/physiology ; Colostrum/immunology ; Female ; Immunoassay/methods ; Immunoassay/standards ; Immunoassay/veterinary ; Immunodiffusion/methods ; Immunodiffusion/veterinary ; Immunoglobulin G/analysis ; Lactation/immunology ; Milk/immunology ; Prospective Studies ; Reagent Kits, Diagnostic ; Sensitivity and Specificity
    Chemical Substances Immunoglobulin G ; Reagent Kits, Diagnostic
    Language English
    Publishing date 2005-07-09
    Publishing country United States
    Document type Comparative Study ; Evaluation Studies ; Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 390811-2
    ISSN 1943-569X ; 0003-1488
    ISSN (online) 1943-569X
    ISSN 0003-1488
    DOI 10.2460/javma.2005.227.129
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Effects of supplemental lactoferrin on serum lactoferrin and IgG concentrations and neutrophil oxidative metabolism in Holstein calves.

    Dawes, Maisie E / Lakritz, Jeffrey / Tyler, Jeff W / Cockrell, Mary / Marsh, Antoinette E / Estes, D Mark / Larson, Robert L / Steevens, Barry

    Journal of veterinary internal medicine

    2003  Volume 18, Issue 1, Page(s) 104–108

    Abstract: Lactoferrin (LF) is an iron-binding protein present in both colostrum and secondary granules of polymorphonuclear neutrophils (PMNs). We hypothesized that supplemental LF enhances neutrophil function in neonatal calves. Newborn calves were assigned to ... ...

    Abstract Lactoferrin (LF) is an iron-binding protein present in both colostrum and secondary granules of polymorphonuclear neutrophils (PMNs). We hypothesized that supplemental LF enhances neutrophil function in neonatal calves. Newborn calves were assigned to receive colostrum (C), colostrum + LF (CLF, 1 g/kg), or milk replacer + LF (MRLF, 1 g/kg). Serum (LF and IgG) and whole blood (neutrophil isolation) samples were obtained prior to treatment (day 0) and at 24 hours and 9 days of age. Serum IgG concentrations (mean +/- SD) in C, CLF, and MRLF calves at 24 hours were 1,911 +/- 994 mg/dL, 2,181 +/- 625 mg/dL, and 0 mg/ dL, respectively. Serum LF concentrations in C, CLF, and MRLF calves on day 0 were 324 +/- 334 ng/mL (range 0-863 ng/mL), 135 +/- 158 ng/mL (range 0-429 ng/mL), and 318 +/- 337 ng/mL (range 0-964 ng/mL), respectively. LF concentrations in C, CLF, and MRLF calves at 24 hours were significantly higher (P < .05), at 1,564 +/- 1,114 ng/mL (range 335-3,628 ng/mL, 2,237 +/- 936 ng/mL (range 31-3,287 ng/mL), and 3,189 +/- 926 ng/mL (range 1,736-4,120 ng/mL), respectively. Cytochrome c reduction in opsonized zymosan-treated or phorbol ester-treated cells was not significantly affected by supplemental LF provided at birth. Oral LF is absorbed in calves but does not alter PMN superoxide production and does not alter IgG absorption.
    MeSH term(s) Animal Nutritional Physiological Phenomena ; Animals ; Animals, Newborn ; Animals, Suckling ; Cattle ; Colostrum ; Dietary Supplements ; Immunoglobulin G/blood ; Lactoferrin/administration & dosage ; Lactoferrin/blood ; Milk Substitutes ; Neutrophils/drug effects ; Neutrophils/metabolism ; Superoxides/metabolism
    Chemical Substances Immunoglobulin G ; Superoxides (11062-77-4) ; Lactoferrin (EC 3.4.21.-)
    Language English
    Publishing date 2003-07-11
    Publishing country United States
    Document type Clinical Trial ; Journal Article ; Randomized Controlled Trial ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 92798-3
    ISSN 1939-1676 ; 0891-6640
    ISSN (online) 1939-1676
    ISSN 0891-6640
    DOI 10.1892/0891-6640(2004)18<104:eoslos>2.0.co;2
    Database MEDical Literature Analysis and Retrieval System OnLINE

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