Prevalence of Mastitis Pathogens Preceding and Following Parturition in Primiparous Beef Cows

Simpson, Robert B.; Nickerson, S.C.; Shockey, J. D.; Phillips, James M.

doi:10.15232/s1080-7446(15)31691-0

Cited by 3 publications

(3 citation statements)

References 16 publications

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“…While individual quarters that were infected had abnormal SCC, cows usually had SCC of less than 500 × 10 3 cells/mL (Brown et al, 1998;Duenas et al, 2001). This is in contrast to other investigators who found that SCC of uninfected quarters were 555 × 10 3 cells/mL while infected quarters had SCC greater than 794 ×10 3 cells/mL (Watts et al, 1986;Simpson et al, 2000). In our study, uninfected quarters had SCC of 91 × 10 3 cells/mL while infected quarters had SCC of 1,077 × 10 3 cells/mL.…”

Section: Discussionmentioning

confidence: 61%

Efficacy of intramuscular treatment of beef cows with oxytetracycline to reduce mastitis and to increase calf growth2

Lents

Wettemann

Paape

et al. 2002

Journal of Animal Science

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Spring-calving multiparous Angus x Hereford cows were used to determine the efficacy of intramuscular treatment with oxytetracycline to reduce the incidence of mastitis-causing bacteria, decrease milk somatic cell counts (SCC), and increase calf growth. During 2 yr, milk samples were collected from each quarter from a total of 319 cows at 8 to 14 d after calving and at weaning, to determine the presence of bacteria and SCC. A California mastitis test (CMT) was performed on milk from each quarter of each cow at the initial sample collection. Cows with a CMT score of 1, 2, or 3 in at least one quarter, were randomly assigned to receive either an intramuscular injection of oxytetracycline (n = 63) or the control vehicle (n = 60), and cows with a CMT score of 0 or trace in all four quarters were not treated (n = 196). Calf weights were determined at birth, early lactation, and weaning. The number of somatic cells in milk and the percentage of quarters that were infected increased as CMT score increased (P < 0.01). The presence of mastitis-causing bacteria at calving increased (P < 0.05) the incidence of infection at weaning. The presence of mastitis-causing bacteria at weaning was associated with increased SCC for quarters and average SCC for cows (P < 0.01). Average SCC per cow at weaning increased (P < 0.05) as the number of infected quarters per cow increased. Treatment did not alter (P > 0.10) the percentage of cows or quarters infected with mastitis-causing bacteria or SCC of cows or quarters at weaning. Average SCC per cow was negatively correlated (P < 0.05) with calf weights at early lactation, but not with weaning weights of calves. Treatment did not influence (P > 0.10) calf weights at early lactation or at weaning. Cows with one or more dry quarters after calving had calves that weighed less at early lactation and weaning than cows with four functional quarters (P < 0.01). Intramuscular oxytetracycline treatment of beef cows that had CMT scores of 1 or greater after calving did not reduce intramammary infection rates or increase calf weights at weaning.

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Section: Discussionmentioning

confidence: 61%

Efficacy of intramuscular treatment of beef cows with oxytetracycline to reduce mastitis and to increase calf growth2

Lents

Wettemann

Paape

et al. 2002

Journal of Animal Science

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“…In beef herds without clinically overt mastitis, the prevalence of intramammary infection has been shown to range from 9 to 66 %. 3,18,23,24,29,30,32,39,41 The spectrum of mastitis pathogens corresponded largely with that seen in dairy cows with a predominance of Staphylococcus spp. and Streptococcus spp.…”

Section: Introductionmentioning

confidence: 68%

“…and Gram-negative pathogens were rare. 3,18,23,24,29,30,32,39,41 To the authors' knowledge, studies on clinical mastitis in beef cows have not been carried out. The spectrum of pathogenic agents differs significantly between subclinical and clinical mastitis in suckling ewes and in dairy cows.…”

Section: Introductionmentioning

confidence: 99%

Mastitis pathogens and antibiotic resistance in beef cows in Switzerland

Vollenweider

Corti

Hochreutener

et al. 2023

SAT

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veterinarians from ten large-animal clinics located in various regions of Switzerland (Cantons of Aargau, Berne, Grisons, St.Gallen, Ticino and Zurich) collected 81 quarter milk samples from 49 beef cows with mastitis. The milk samples were submitted to the Institute for Food Safety and Hygiene, where culture and antibiotic susceptibility testing was done. The following data were recorded: Breed, results of the California Mastitis Test (CMT) and macroscopic assessment of the secretion (normal, watery, presence of clots and/or blood, foul odour), the stage of disease (acute, chronic, subclinical), the antibiotic used in pretreatment, the clinical appearance of the affected quarter, signs of systemic illness, lactation

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Longevity Attributes of Bos indicus × Bos taurus Crossbred Cows

Thrift

2003

The Professional Animal Scientist

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Prevalence of Mastitis Pathogens Preceding and Following Parturition in Primiparous Beef Cows

Cited by 3 publications

References 16 publications

Efficacy of intramuscular treatment of beef cows with oxytetracycline to reduce mastitis and to increase calf growth2

Efficacy of intramuscular treatment of beef cows with oxytetracycline to reduce mastitis and to increase calf growth2

Mastitis pathogens and antibiotic resistance in beef cows in Switzerland

Longevity Attributes of Bos indicus × Bos taurus Crossbred Cows

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