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House JK, Izzo MM, Page SW, Browning GF, Norris JM. Antimicrobial prescribing guidelines for dairy cattle. Aust Vet J 2024; 102:143-186. [PMID: 38317437 DOI: 10.1111/avj.13311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2024]
Affiliation(s)
- J K House
- Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, Sydney, NSW, Australia
| | - M M Izzo
- Smithton Veterinary Service, Smithton TAS, Australia
| | - S W Page
- Advanced Veterinary Therapeutics, Newtown, NSW, Australia
| | - G F Browning
- Asia-Pacific Centre for Animal Health, Melbourne Veterinary School, Faculty of Science, The University of Melbourne, Parkville, Victoria, Australia
| | - J M Norris
- Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, Sydney, NSW, Australia
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Morgan AL, Woolhouse ME, Wagenaar JA, van Bunnik BA. Modelling the effects of antibiotic usage in livestock on human salmonellosis. One Health 2023; 17:100639. [PMID: 38024252 PMCID: PMC10665166 DOI: 10.1016/j.onehlt.2023.100639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 10/05/2023] [Accepted: 10/06/2023] [Indexed: 12/01/2023] Open
Abstract
Antibiotic usage in livestock has been suggested as a driver of antimicrobial resistance in human and livestock populations. This has contributed to the implementation of stewardship programs to curtail usage of antibiotics in livestock. However, the consequences of antibiotic curtailment in livestock on human health are poorly understood. There is the potential for increases in the carriage of pathogens such as Salmonella spp. in livestock, and subsequent increases in human foodborne disease. We use a mathematical model fitted to four case studies, ampicillin and tetracycline usage in fattening pig and broiler poultry populations, to explore the impact of curtailing antibiotic usage in livestock on salmonellosis in humans. Increases in the daily incidence of salmonellosis and a decrease in the proportion of resistant salmonellosis were identified following curtailment of antibiotic usage in livestock. The extent of these increases in human foodborne disease ranged from negligible, to controllable through interventions to target the farm-to-fork pathway. This study provides a motivating example of one plausible scenario following curtailment of antibiotic usage in livestock and suggests that a focus on ensuring good farm-to-fork hygiene and livestock biosecurity is sufficient to mitigate the negative human health consequences of antibiotic stewardship in livestock populations.
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Affiliation(s)
- Alex L.K. Morgan
- Centre for Immunity, Infection & Evolution and School of Biological Sciences, University of Edinburgh, Edinburgh, United Kingdom
- Department of Environmental Systems Science, ETH Zürich, Zürich, Switzerland
| | - Mark E.J. Woolhouse
- Centre for Immunity, Infection & Evolution and School of Biological Sciences, University of Edinburgh, Edinburgh, United Kingdom
- Usher Institute, University of Edinburgh, Edinburgh, United Kingdom
| | - Jaap A. Wagenaar
- Division of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
- Wageningen Bioveterinary Research, Lelystad, Netherlands
- WHO Collaborating Center for Reference and Research on Campylobacter and Antimicrobial Resistance from a One Health Perspective/WOAH Reference Laboratory for Campylobacteriosis, Utrecht, Netherlands
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Bernal-Córdoba C, Branco-Lopes R, Latorre-Segura L, de Barros-Abreu M, Fausak ED, Silva-Del-Río N. Use of antimicrobials in the treatment of calf diarrhea: a systematic review. Anim Health Res Rev 2022; 23:101-112. [PMID: 36636804 DOI: 10.1017/s1466252322000032] [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] [Indexed: 01/14/2023]
Abstract
The objective of this study was to conduct a systematic review of the scientific literature evaluating the efficacy and comparative efficacy of antimicrobials (AMs) for the treatment of diarrhea in calves. Eligible studies were non- and randomized controlled trials evaluating an AM intervention against a positive and negative control, with at least one of the following outcomes: fecal consistency score, fever, dehydration, appetite, attitude, weight gain, and mortality. Four electronic databases were searched. Titles and abstracts (three reviewers) and full texts (two reviewers) were screened. A total of 2899 studies were retrieved; 11 studies met the inclusion criteria. The risk of bias was assessed. Most studies had incomplete reporting of trial design and results. Eight studies compared AMs to a negative control (placebo or no treatment). Among eligible studies, the most common outcomes reported were diarrhea severity (n = 6) and mortality (n = 6). Eligible studies evaluated very different interventions and outcomes; thus, a meta-analysis was not performed. The risk of bias assessment revealed concerns with reporting of key trial features, including disease and outcome definitions. Insufficient evidence is available in the scientific literature to assess the efficacy of AMs in treating calf diarrhea.
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Affiliation(s)
- C Bernal-Córdoba
- Veterinary Medicine Teaching and Research Center, 18830 Road 112, Tulare, CA 93274, USA
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, Davis, CA 95616, USA
| | - R Branco-Lopes
- Veterinary Medicine Teaching and Research Center, 18830 Road 112, Tulare, CA 93274, USA
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, Davis, CA 95616, USA
| | - L Latorre-Segura
- Veterinary Medicine Teaching and Research Center, 18830 Road 112, Tulare, CA 93274, USA
| | - M de Barros-Abreu
- Veterinary Medicine Teaching and Research Center, 18830 Road 112, Tulare, CA 93274, USA
| | - E D Fausak
- Carlson Health Science Library, University of California, Davis, Davis, CA 95616, USA
| | - N Silva-Del-Río
- Veterinary Medicine Teaching and Research Center, 18830 Road 112, 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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Bacterial Causes of Intestinal Disease in Dairy Calves: Acceptable Control Measures. Vet Clin North Am Food Anim Pract 2022; 38:107-119. [PMID: 35219479 DOI: 10.1016/j.cvfa.2021.11.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Although diarrhea in dairy calves is common, it is not always due to bacteria. Escherichia coli, Salmonella, and Clostridium perfringens are the most commonly implicated bacteria, but an etiologic diagnosis should be sought before specific treatment is instituted. Nonspecific treatment such as fluid, electrolyte, and nutritional support should be accomplished while diagnostics are pending. Antimicrobials should not be a first-line therapy for calf diarrhea. Control measures are discussed.
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Santana AM, Silva DG, Thomas FC, Bernardes PA, Pizauro LJL, Santana CH, Burchmore RJS, Eckersall PD, Fagliari JJ. Blood serum acute phase proteins and iron dynamics during acute phase response of Salmonella enterica serotype Dublin experimentally infected buffalo calves. Vet Immunol Immunopathol 2018; 203:30-39. [PMID: 30243370 DOI: 10.1016/j.vetimm.2018.07.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 07/19/2018] [Accepted: 07/30/2018] [Indexed: 01/20/2023]
Abstract
The study aimed to evaluate clinical signs, blood serum acute phase proteins (APP) and iron dynamics during the acute phase response (APR) of Salmonella Dublin experimentally infected Murrah buffalo calves. Six buffalo calves constituted the control group (CNT) and six were orally inoculate with 108 CFU of S. Dublin (INF). Clinical evaluation was performed, rectal swabs to detect S. Dublin strains were collected and venous blood was sampled before and throughout seven days after inoculation. The APP fractions β-haptoglobin, α-haptoglobin, ceruloplasmin and transferrin were analyzed by 1-D and 2-D electrophoresis. Proteins were identified using LC/ESI-MS/MS and NCBI database. Plasma fibrinogen, serum iron and serum haptoglobin concentrations were measured. The inoculation of 108 CFU of S. Dublin was effective in inducing clinical signs of Salmonellosis, such as hyperthermia and diarrhea. 1-DE showed that β and α-haptoglobin increased 204% (p = 0.008) and 184% (p = 0.022) 48 h after inoculation (HAI), respectively, with highest concentrations 120 HAI (498% increased, p = 0.012; 431% increased, p = 0.011) and 168 HAI (492% increased, p = 0.019; 523% increased, p = 0.028). 2-DE showed that the expression of two spots, identified as β-haptoglobin, were increased 693% (p = 0.0006) and 580% (p = 0.0003) 168 HAI, respectively, while one spot, identified as α-haptoglobin, increased 714% (p = 0.040). Haptoglobin concentrations increased 1339% (p < 0.0001) 168 HAI. 1-DE showed that ceruloplasmin increased 42% (p = 0.034) 48 HAI, with highest concentration 120 HAI (133% increased, p = 0.022). 2-DE showed that the expression of two spots, identified as ceruloplasmin, were increased 218% (p = 0.0153) and 85% (p = 0.0143) 168 HAI, respectively. Fibrinogen increased 78% (p = 0.012) 96 HAI, with highest concentration 120 HAI (increased 114%, p = 0.002). Iron decreased 33% 24 HAI (p = 0.015) and 37% 72 HAI (p = 0.029), and began to be restored 96 HAI. 1-DE showed that transferrin decreased 23% 120 HAI (p = 0.047), and that values were restored 168 HAI. 2-DE showed that expression patterns of transferrin comparing 0 h and 168 HAI were similar, evidencing that values were restored 168 HAI. In conclusion, the inoculation of 108 CFU was effective in inducing hyperthermia and diahrrea. β and α-haptoglobin, ceruloplasmin and fibrinogen worked as positive APP during the APR to S. Dublin infection and are potential biomarker candidates. Concentrations of iron and transferrin decreased during the infection, highlighting the fact that mechanisms for restricting iron availability are part of the APR triggered against S. Dublin infection in buffalo calves.
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Affiliation(s)
- André M Santana
- Department of Veterinary Clinic and Surgery, School of Agricultural and Veterinary Sciences, São Paulo State University (FCAV/UNESP), Jaboticabal, SP, Brazil.
| | - Daniela G Silva
- Department of Veterinary Clinic and Surgery, School of Agricultural and Veterinary Sciences, São Paulo State University (FCAV/UNESP), Jaboticabal, SP, Brazil
| | - Funmilola C Thomas
- Department of Veterinary Physiology and Pharmacology, College of Veterinary Medicine, Federal University of Agriculture, Abeokuta, Nigeria
| | - Priscila A Bernardes
- Department of Veterinary Clinic and Surgery, School of Agricultural and Veterinary Sciences, São Paulo State University (FCAV/UNESP), Jaboticabal, SP, Brazil
| | - Lucas J L Pizauro
- Department of Veterinary Clinic and Surgery, School of Agricultural and Veterinary Sciences, São Paulo State University (FCAV/UNESP), Jaboticabal, SP, Brazil
| | - Clarissa H Santana
- Department of Veterinary Clinic and Surgery, School of Agricultural and Veterinary Sciences, São Paulo State University (FCAV/UNESP), Jaboticabal, SP, Brazil
| | - Richard J S Burchmore
- Institute of Infection, Immunity and Inflammation, Glasgow Polyomics Facility, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Peter D Eckersall
- Institute of Biodiversity, Animal Health and Comparative Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - José J Fagliari
- Department of Veterinary Clinic and Surgery, School of Agricultural and Veterinary Sciences, São Paulo State University (FCAV/UNESP), Jaboticabal, SP, Brazil
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Santana AM, Thomas FC, Silva DG, McCulloch E, Vidal AMC, Burchmore RJS, Fagliari JJ, Eckersall PD. Reference 1D and 2D electrophoresis maps for potential disease related proteins in milk whey from lactating buffaloes and blood serum from buffalo calves (Water buffalo, Bubalus bubalis). Res Vet Sci 2018; 118:449-465. [PMID: 29734122 DOI: 10.1016/j.rvsc.2018.04.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2018] [Accepted: 04/24/2018] [Indexed: 01/05/2023]
Abstract
The aim of this study was to identify potential disease related proteins in milk whey of lactating buffaloes and blood serum of buffalo calves, in order to define a reference electrophoresis map for 1-DE and 2-DE. Additionally, changes in some protein patterns from buffalo calves during salmonellosis and lactating buffaloes during mastitis are presented. Milk samples were collected and distributed into groups: Milk samples from healthy buffaloes (SCC < 100.000 cells/ml, negative microbiology and CMT) (G1, n = 5) and buffaloes with subclinical mastitis (SCC > 500.000 cells/ml, positive microbiology and CMT) (G2, n = 5). Blood samples from buffalo calves (n = 6) were collected, and three calves were experimentally infected with Salmonella Dublin and samples analyzed before (M0) and 72 h after inoculation (M1). 1-DE was accomplished by loading 10 μg of TP into SDS-PAGE, stained with Coomassie blue. 2-DE was accomplished by loading 200 μg of TP into 11 cm, pH 3-10 non-linear IPG strips, followed by SDS-PAGE, stained with Coomassie blue. Protein bands/spots were excised, subjected to tryptic in-gel digestion and analyzed by LC/ESI-MS/MS. Protein identity was assigned using NCBI databases. After bands/spots from 1-DE and 2-DE were analyzed, a protein map with 35 and 40 different identified proteins in blood serum and milk whey, respectively, was generated. Significant changes in patterns of haptoglobin were observed in buffalo calves with salmonellosis and in patterns of IgLC, β-lactoglobulin and α-lactalbumin of lactating buffaloes during mastitis. The establishment of a protein map for 1-DE and 2-DE, identifying potential disease related proteins, can help to address alterations during diseases in buffaloes.
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Affiliation(s)
- André M Santana
- Department of Veterinary Clinic and Surgery, School of Agricultural and Veterinary Sciences, São Paulo State University (FCAV/UNESP), Jaboticabal, SP, Brazil.
| | - Funmilola C Thomas
- Department of Veterinary Physiology and Pharmacology, College of Veterinary Medicine, Federal University of Agriculture, Abeokuta, Nigeria
| | - Daniela G Silva
- Department of Veterinary Clinic and Surgery, School of Agricultural and Veterinary Sciences, São Paulo State University (FCAV/UNESP), Jaboticabal, SP, Brazil
| | - Eilidh McCulloch
- Institute of Biodiversity, Animal Health and Comparative Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Ana M C Vidal
- Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering, University of São Paulo (FZEA/USP), Pirassununga, SP, Brazil
| | - Richard J S Burchmore
- Institute of Infection, Immunity and Inflammation, Glasgow Polyomics Facility, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - José J Fagliari
- Department of Veterinary Clinic and Surgery, School of Agricultural and Veterinary Sciences, São Paulo State University (FCAV/UNESP), Jaboticabal, SP, Brazil
| | - Peter D Eckersall
- Institute of Biodiversity, Animal Health and Comparative Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
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Population dynamics of enteric Salmonella in response to antimicrobial use in beef feedlot cattle. Sci Rep 2017; 7:14310. [PMID: 29085049 PMCID: PMC5662634 DOI: 10.1038/s41598-017-14751-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 10/06/2017] [Indexed: 12/20/2022] Open
Abstract
A randomized controlled longitudinal field trial was undertaken to assess the effects of injectable ceftiofur crystalline-free acid (CCFA) versus in-feed chlortetracycline on the temporal dynamics of Salmonella enterica spp. enterica in feedlot cattle. Two replicates of 8 pens (total 176 steers) received one of 4 different regimens. All, or one, out of 11 steers were treated with CCFA on day 0 in 8 pens, with half of the pens later receiving three 5-day regimens of chlortetracycline from day 4 to day 20. Salmonella was isolated from faecal samples and antimicrobial susceptibility was analysed via microbroth dilution. Serotype was determined by whole-genome sequencing. On day 0, mean Salmonella prevalence was 75.0% and the vast majority of isolates were pansusceptible. Both antimicrobials reduced overall prevalence of Salmonella; however, these treatments increased the proportion of multi-drug resistant (MDR) Salmonella from day 4 through day 26, which was the last day of faecal collection. Only six Salmonella serotypes were detected. Salmonella serotype Reading isolates were extensively MDR, suggesting a strong association between serotype and resistance. Our study demonstrates that the selection pressures of a 3rd generation cephalosporin and chlortetracycline during the feeding period contribute to dynamic population shifts between antimicrobial susceptible and resistant Salmonella.
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Woodrow JS, Caldwell M, Cox S, Hines M, Credille BC. Comparative plasma pharmacokinetics of ceftiofur sodium and ceftiofur crystalline-free acid in neonatal calves. J Vet Pharmacol Ther 2015; 39:271-6. [DOI: 10.1111/jvp.12275] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Accepted: 09/24/2015] [Indexed: 11/30/2022]
Affiliation(s)
- J. S. Woodrow
- Department of Large Animal Clinical Sciences; College of Veterinary Medicine; University of Tennessee; Knoxville TN USA
| | - M. Caldwell
- Department of Large Animal Clinical Sciences; College of Veterinary Medicine; University of Tennessee; Knoxville TN USA
| | - S. Cox
- Department of Comparative Medicine; College of Veterinary Medicine; University of Tennessee; Knoxville TN USA
| | - M. Hines
- Department of Large Animal Clinical Sciences; College of Veterinary Medicine; University of Tennessee; Knoxville TN USA
| | - B. C. Credille
- Department of Population Health; College of Veterinary Medicine; University of Georgia; Athens GA USA
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Effects of ceftiofur treatment on the susceptibility of commensal porcine E.coli--comparison between treated and untreated animals housed in the same stable. BMC Vet Res 2015; 11:265. [PMID: 26472561 PMCID: PMC4608134 DOI: 10.1186/s12917-015-0578-3] [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: 06/09/2015] [Accepted: 10/08/2015] [Indexed: 11/26/2022] Open
Abstract
Background Healthy farm animals have been found to act as a reservoir of extended-spectrum β-lactamase (ESBL)-producing Escherichia coli (E. coli). Therefore, the objective of the study was to determine the input of antimicrobial active ceftiofur metabolites in the stable via faeces and urine after intramuscular administration of the drug to pigs and the elucidation of the Escherichia coli ESBL resistance pattern of treated and untreated pigs housed in the same barn during therapy. Methods For determination of the minimal inhibitory concentration (MIC) the method of microdilutionaccording to the recommended procedure of the Clinical and Laboratory Standards Institute was used. Inaddition to that, a qualitative determination was performed by agar dilution. Unsusceptible E. coli speciesselected via agar dilution with cefotaxime were confirmed by MALDI-TOF and ESBL encoding genes wereidentified by PCR. The amounts of ceftiofur measured as desfuroylceftiofur (DFC) in the different probes (plasma, urine, faeces and dust) were analysed by UPLC-MS/MS. Results In a first experiment two groups of pigs (6 animals per group) were housed in the same barn in two separated boxes. One group (group B) were treated with ceftiofur according to the licence (3 mg/kg administered intramuscularly (i.m.) on three consecutive days, day 1–3). During a second treatment period (day 29–31) an increased rate of ESBL resistant E. coli was detectable in these treated pigs and in the air of the stable. Moreover, the second group of animals (group A) formerly untreated but housed for the whole period in the same stable as the treated animals revealed increased resistance rates during their first treatment (day 45–47) with ceftiofur. In order to investigate the environmental input of ceftiofur during therapy and to simulate oral uptake of ceftiofur residues from the air of the stable a second set of experiments were performed. Pigs (6 animals) were treated with an interval of 2 weeks for 3 days with different doses of ceftiofur (3 mg/kg, 1 mg/kg and 0.3 mg/kg i.m.) as well as with 3 mg/kg per os) and the renal and biliary excretion of ceftiofur as its active metabolite were measured in comparison to the plasma levels. In addition to that, probes of the sedimentation dust and the air of the stable were analysed for drug residues. Conclusion The present study shows that treatment of several animals in a stable with ceftiofur influences the resistance pattern of intestinal Escherichia coli of the treated as well as untreated animals housed in the same stable. During therapy with the drug which was administered by injection according to the licence we detected nameable amounts of ceftiofur and its active metabolites in the dust and air of the stable. Electronic supplementary material The online version of this article (doi:10.1186/s12917-015-0578-3) contains supplementary material, which is available to authorized users.
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Ávila L, Silva D, Sato R, Fagliari J. Avaliação clínica da infecção experimental de bezerros com Salmonella Typhimurium. ARQ BRAS MED VET ZOO 2011. [DOI: 10.1590/s0102-09352011000600043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Izzo MM, Mohler VL, House JK. Antimicrobial susceptibility of Salmonella isolates recovered from calves with diarrhoea in Australia. Aust Vet J 2011; 89:402-8. [DOI: 10.1111/j.1751-0813.2011.00818.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Aceto H, Miller SA, Smith G. Onset of diarrhea and pyrexia and time to detection ofSalmonella entericasubspentericain feces in experimental studies of cattle, horses, goats, and sheep after infection per os. J Am Vet Med Assoc 2011; 238:1333-9. [DOI: 10.2460/javma.238.10.1333] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Tang S, Xiao J, Guo G, He J, Hao Z, Xiao X. Preparation of a newly formulated long-acting ceftiofur hydrochloride suspension and evaluation of its pharmacokinetics in pigs. J Vet Pharmacol Ther 2010; 33:238-45. [PMID: 20557440 DOI: 10.1111/j.1365-2885.2009.01126.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A new long-acting ceftiofur hydrochloride preparation was formulated and its physical properties, stability, and pharmacokinetics were investigated in this study. The prepared ceftiofur hydrochloride suspension demonstrated a milk white consistency, was easy to re-disperse and was stable in light, heat and humidity stability tests. Its other physical properties such as flowability, syringeability, settling volume ratio, particle size and distribution were perfectly consistent with the standard of Ministry of Agriculture of the People's Republic of China. After intramuscular administration of a single dose in swine (5 mg/kg B.W.), the drug concentration-time data in plasma were well fitted using the two-compartment open model. Compared with the ceftiofur hydrochloride preparation (EXCENEL) from Pfizer, the peak concentration (C(max)) in plasma was decreased by 2.34 times (P < 0.001), the half-life of elimination phase (T(1/2beta)) was 1.65 times longer (P < 0.001), and the therapeutic level of ceftiofur above the lowest effective plasma concentration of 0.2 microg/mL (T > 0.2) was prolonged from 87.20 h to 135.36 h (P < 0.001). The ceftiofur hydrochloride suspension prepared in this study provides therapeutically effective plasma concentrations for a longer duration, which make it more effective and more convenient to use in the treatment of respiratory diseases that require the maintenance of therapeutic plasma concentrations over a long duration.
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Affiliation(s)
- S Tang
- Division of Pharmacology and Toxicology, College of Veterinary Medicine, China Agricultural University, Beijing, China
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14
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Silva D, Silva P, Fagliari J. Efficacy of florfenicol and intravenous fluid therapy for treatment of experimental salmonellosis in newborn calves. ARQ BRAS MED VET ZOO 2010. [DOI: 10.1590/s0102-09352010000300001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The efficacy of florfenicol associated or not to intravenous fluid therapy for treatment of Salmonella Dublin-infected calves was determined. Twenty-four healthy 10 to 15-day-old Holstein calves were randomly allotted into four groups, with six animals each: control (group 1); infected with 10(8)CFU Salmonella Dublin and not treated (group 2); infected with 10(8)CFU Salmonella Dublin and treated with florfenicol (group 3); and infected with 10(8)CFU Salmonella Dublin and treated with florfenicol associated to fluid therapy (group 4). All animals were submitted to physical examination just before inoculation and every 24 hours, during seven days after experimental infection. Rectal swabs and blood samples were collected for Salmonella Dublin isolation and pH and blood electrolytes determination. The experimental infection with Salmonella Dublin induced clinical signs of salmonellosis, such as diarrhea and fever, and caused reduction in blood concentrations of pH, sodium, potassium and chlorides. The treated calves showed good clinical recovery, and the group treated with antibiotic in combination to fluid therapy presented a faster and more efficient correction of the hydro-electrolyte balance.
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Heider LC, Funk JA, Hoet AE, Meiring RW, Gebreyes WA, Wittum TE. Identification of Escherichia coli and Salmonella enterica organisms with reduced susceptibility to ceftriaxone from fecal samples of cows in dairy herds. Am J Vet Res 2009; 70:389-93. [PMID: 19254152 DOI: 10.2460/ajvr.70.3.389] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To estimate the relationship between therapeutic use of ceftiofur and recovery of Escherichia coli and Salmonella spp with reduced susceptibility to ceftriaxone from feces of dairy cattle. ANIMALS 3,840 mature dairy cows on 50 dairy herds in Ohio. Procedures-Fecal samples were obtained from up to 100 mature dairy cows on each farm. Samples were screened for E coli and Salmonella spp with reduced susceptibility to ceftriaxone by use of selective media. RESULTS E coli with reduced susceptibility to ceftriaxone was recovered from 92% (46/50) of the herds and 60.9% (2,338/3,840) of cows. Salmonella spp were recovered from 44% (22/50) of the herds and 9.9% (382/3,840) of cows. No association was found between ceftiofur use and recovery of E coli with reduced susceptibility to ceftriaxone at the herd level. However, recovery of E coli with reduced susceptibility to ceftriaxone was more likely from cows in herds in which Salmonella spp were also recovered on the day of collection (odds ratio, 24.96; 95% confidence interval, 3.17 to 196.68) than from herds in which Salmonella spp were not recovered. Odds of recovery of E coli with reduced susceptibility to ceftriaxone from an individual cow increased 62% (odds ratio, 1.62; 95% confidence interval, 1.16 to 2.25) for every 454-kg increase in herd milk production. CONCLUSIONS AND CLINICAL RELEVANCE No evidence was found that the use of ceftiofur on dairy farms increases the prevalence or dissemination of Salmonella spp or E coli with reduced susceptibility to ceftriaxone.
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Affiliation(s)
- Luke C Heider
- Department of Veterinary Preventive Medicine, The Ohio State University, Columbus, OH 43210, USA
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Abstract
Salmonellae are endemic on most large intensive farms and salmonellosis is a common cause of neonatal morbidity and mortality. Disease and mortality usually reflect a variety of management events and environmental stressors that contribute to compromised host immunity and increased pathogen exposure. The diversity of salmonella serovars present on farms, and the potential for different serovars to possess different virulence factors, require the implementation of broad prophylactic strategies that are efficacious for all salmonellae. This article discusses strategies to promote host immunity and minimize pathogen exposure at the farm level. The benefits of control include a reduction in disease incidence and mortality, reduced drug and labor costs, and improved growth rates.
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Affiliation(s)
- Virginia L Mohler
- Livestock Veterinary Teaching and Research Unit, Faculty of Veterinary Science, University of Sydney, PMB 4, Narellan Delivery Centre, Camden, NSW 2567, Australia
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Constable PD. Treatment of calf diarrhea: antimicrobial and ancillary treatments. Vet Clin North Am Food Anim Pract 2009; 25:101-20, vi. [PMID: 19174285 PMCID: PMC7127407 DOI: 10.1016/j.cvfa.2008.10.012] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Adjunct treatment of diarrhea should be routinely undertaken in all calves with systemic signs of illness, manifest as fever, inappetance, or lethargy. Ancillary treatments with documented efficacy in undifferentiated calf diarrhea include parenteral administration of antimicrobials with a predominantly gram negative spectrum of activity, parenteral administration of non-steroidal anti-inflammatory agents such as meloxicam and flunixin meglumine, and continued feeding of cow's milk. Halofuginone and azithromycin have efficacy in calves with diarrhea due to Cryptosporidium parvum, and their administration should be considered in calves documented or suspected to have cryptosporidiosis.
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Affiliation(s)
- Peter D Constable
- Department of Veterinary Clinical Sciences, School of Veterinary Medicine, Purdue University, 625 Harrison Street, West Lafayette, IN 47907-2026, USA.
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18
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Role of ceftiofur in selection and dissemination of blaCMY-2-mediated cephalosporin resistance in Salmonella enterica and commensal Escherichia coli isolates from cattle. Appl Environ Microbiol 2009; 75:3648-55. [PMID: 19376926 DOI: 10.1128/aem.02435-08] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Third-generation cephalosporin resistance of Salmonella and commensal Escherichia coli isolates from cattle in the United States is predominantly conferred by the cephamycinase CMY-2, which inactivates beta-lactam antimicrobial drugs used to treat a wide variety of infections, including pediatric salmonellosis. The emergence and dissemination of bla(CMY-2)(-)-bearing plasmids followed and may in part be the result of selection pressure imposed by the widespread utilization of ceftiofur, a third-generation veterinary cephalosporin. This study assessed the potential effects of ceftiofur on bla(CMY-2) transfer and dissemination by (i) an in vivo experimental study in which calves were inoculated with competent bla(CMY-2)-bearing plasmid donors and susceptible recipients and then subjected to ceftiofur selection and (ii) an observational study to determine whether ceftiofur use in dairy herds is associated with the occurrence and frequency of cephalosporin resistance in Salmonella and commensal E. coli. The first study revealed bla(CMY-2) plasmid transfer in both ceftiofur-treated and untreated calves but detected no enhancement of plasmid transfer associated with ceftiofur treatment. The second study detected no association (P = 0.22) between ceftiofur use and either the occurrence of ceftiofur-resistant salmonellosis or the frequency of cephalosporin resistance in commensal E. coli. However, herds with a history of salmonellosis (including both ceftiofur-resistant and ceftiofur-susceptible Salmonella isolates) used more ceftiofur than herds with no history of salmonellosis (P = 0.03) These findings fail to support a major role for ceftiofur use in the maintenance and dissemination of bla(CMY-2)-bearing plasmid mediated cephalosporin resistance in commensal E. coli and in pathogenic Salmonella in these dairy cattle populations.
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20
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Lanzas C, Warnick LD, Ivanek R, Ayscue P, Nydam DV, Gröhn YT. The risk and control of Salmonella outbreaks in calf-raising operations: a mathematical modeling approach. Vet Res 2008; 39:61. [PMID: 18778681 DOI: 10.1051/vetres:2008038] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2008] [Accepted: 09/03/2008] [Indexed: 11/14/2022] Open
Abstract
Salmonellosis in calves has economic and welfare implications, and serves as a potential source of human infections. Our objectives were to assess the risk of Salmonella spread following its introduction into a herd of pre-weaned calves and to evaluate the efficacy of control strategies to prevent and control outbreaks. To meet these objectives, we developed a model of Salmonella transmission within a pre-weaned group of calves based on a well documented outbreak of salmonellosis in a calf-raising operation and other literature. Intervention scenarios were evaluated in both deterministic and stochastic versions of the model. While the basic reproduction number (R0) was estimated to be 2.4, simulation analysis showed that more than 60% of the invasions failed after the introduction of a single index case. With repeated introduction of index cases, the probability of Salmonella spread was close to 1, and the tested control strategies were insufficient to prevent transmission within the group. The most effective strategies to control ongoing outbreaks were to completely close the rearing operation to incoming calves, to increase the proportion of admitted calves that were immunized (>75%), and to assign personnel and equipment to groups of calves.
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Affiliation(s)
- Cristina Lanzas
- Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA.
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21
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Silva D, Fagliari J, Garcia T. Comparação da eficiência dos caldos de enriquecimento seletivo no isolamento de Salmonella Dublin. ARQ BRAS MED VET ZOO 2008. [DOI: 10.1590/s0102-09352008000300036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Abstract
This article focuses on the most important diseases of dairy calves and heifers and presents clinical approaches that can improve detection, diagnosis, and treatment of herd-based problems. A systematic herd investigation strategy is pivotal to define the problems, understand important risk factors, develop a plan, and make recommendations for disease management accurately. A review of records, colostrum and feeding routines, housing and bedding management, routine procedures, vaccination, and treatment protocols begins the investigation and determines which diagnostic procedures and testing strategies are most useful. Disease management is most effective when the problem source is well defined and the exposure can be limited, calf immunity can be enhanced, or a combination of both. Screening examinations performed regularly or done at strategic time points improves detection of disease, can be used to monitor treatment outcomes, and can avoid disease outbreaks.
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Affiliation(s)
- Sheila M McGuirk
- Department of Medical Sciences, University of Wisconsin-Madison School of Veterinary Medicine, 2015 Linden Drive, Madison, WI 53706, USA.
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23
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Mohler V, Heithoff D, Mahan M, Walker K, Hornitzky M, Shum L, Makin K, House J. Cross-protective immunity conferred by a DNA adenine methylase deficient Salmonella enterica serovar Typhimurium vaccine in calves challenged with Salmonella serovar Newport. Vaccine 2008; 26:1751-8. [DOI: 10.1016/j.vaccine.2008.01.018] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2007] [Revised: 01/09/2008] [Accepted: 01/14/2008] [Indexed: 10/22/2022]
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24
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Davis MA, Hancock DD, Besser TE, Daniels JB, Baker KNK, Call DR. Antimicrobial resistance in Salmonella enterica serovar Dublin isolates from beef and dairy sources. Vet Microbiol 2007; 119:221-30. [PMID: 17034963 DOI: 10.1016/j.vetmic.2006.08.028] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2006] [Revised: 08/24/2006] [Accepted: 08/28/2006] [Indexed: 11/20/2022]
Abstract
Salmonella enterica serovar Dublin (S. Dublin) is a cattle-adapted Salmonella serovar, so if antimicrobial resistance in S. Dublin arises as a result of antimicrobial use this most likely occurs within the cattle reservoir without impact from antimicrobial use in humans. We tested the antimicrobial resistance of bovine-origin S. Dublin isolates from 1986 through 2004 using a standard disk diffusion method. High proportions of isolates throughout the time period were resistant to one or more antimicrobials, and a marked increase in resistance to ceftazidime occurred between 2000 and 2004. Dairy-origin isolates were more likely to be resistant to several antibiotics than were isolates from beef operations where exposure to antimicrobials is likely to be less frequent. Plasmid analysis of a subset of isolates also supported the hypothesis that antimicrobial resistance traits in the cattle-adapted serovar Dublin were acquired within the bovine host environment.
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Affiliation(s)
- Margaret A Davis
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA 99164, USA.
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25
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Jiang X, Yang H, Dettman B, Doyle MP. Analysis of Fecal Microbial Flora for Antibiotic Resistance in Ceftiofur-Treated Calves. Foodborne Pathog Dis 2006; 3:355-65. [PMID: 17199517 DOI: 10.1089/fpd.2006.3.355] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
To evaluate the impact of ceftiofur treatment in calves on fecal shedding of ceftriaxone-resistant bacteria, 3 female Holstein dairy calves were treated by intramuscular injection with EXCENEL RTU (ceftiofur hydrochloride, Pharmacia and Upjohn) at a therapeutic dosage of 2.2 mg/kg/day for 5 consecutive days following label directions. Three untreated calves were housed separately and served as controls. One to 3 days following the initial administration of ceftiofur, there was a 14% and 2% increase of fecal bacteria resistant to 16 and 64 microg ceftriaxone/mL, respectively. This response remained unchanged from days 6 to 13, and increased resistance was seen at day 17. Randomly selected isolates of gram-positive and gram-negative bacteria with elevated resistance to ceftriaxone (minimal inhibitory concentration (MIC) >or=64 microg ceftriaxone/mL) were isolated from calf feces and identified. In vitro conjugation experiments revealed that both the ceftriaxone-resistance gene bla (CMY-2) and class 1 integron were transferred from two bacterial species to Salmonella spp. at a frequency of 10(7) to 10(5). MIC data revealed that Salmonella transconjugants acquired either reduced susceptibility or resistance to ceftriaxone as well as to multiple antibiotics. This genetic transfer occurred both within and between genera. Treatment of calves with therapeutic dosages of ceftiofur can significantly increase for at least 17 days following the initial treatment the fecal excretion of ceftriaxone-resistant bacteria, including Salmonella species.
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Affiliation(s)
- Xiuping Jiang
- Department of Food Science and Human Nutrition, Clemson University, Clemson, South Carolina 29634, USA.
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Berge ACB, Lindeque P, Moore DA, Sischo WM. A Clinical Trial Evaluating Prophylactic and Therapeutic Antibiotic Use on Health and Performance of Preweaned Calves. J Dairy Sci 2005; 88:2166-77. [PMID: 15905446 DOI: 10.3168/jds.s0022-0302(05)72892-7] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The objective of this clinical trial was to evaluate the influence of prophylactic and therapeutic antibiotics on health and performance in preweaned dairy calves on a calf ranch. One hundred twenty 1-d-old calves were enrolled into 3 management systems for antibiotic use and raised until 4 wk of age. Sixty calves were not eligible to receive prophylactic or therapeutic antibiotics. Thirty calves were eligible to receive individual antibiotic treatment for disease, but no prophylactic antibiotics in milk replacer. The remaining 30 calves received milk replacer medicated with neomycin and tetracycline HCl, and could be treated with antibiotics. Health status and treatments were monitored and recorded daily. The primary study outcomes were weight gain, morbidity, and mortality. The most important factor associated with morbidity and mortality was passive immune transfer through colostrum. In-feed antibiotics delayed onset of morbidity, decreased overall morbidity, and increased weight gain. Nonantibiotic therapies for clinical disease were associated with increased mortality and morbidity compared with antibiotic treatments. The study has shown that minimizing or eliminating the use of antibiotics in the feed requires measures to ensure adequate passive transfer of immunity, but that in the face of inadequate passive transfer of immunity, animal welfare may be endangered by replacing medicated milk replacer with nonmedicated milk replacer, and therapeutic antibiotics with nonantibiotic alternatives.
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Affiliation(s)
- A C B Berge
- Veterinary Medicine Teaching and Research Center, University of California-Davis, Tulare, 93274, USA.
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