Subclinical mastitis in suckler cows

Hunter, A. G.; Jeffrey, D C

doi:10.1136/vr.96.20.442

Cited by 8 publications

(6 citation statements)

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“…The absence of this bacteria is in accordance with previous studies in beef cows (Wilson et al, 1971;Watts et al, 1986;Newman et al, 1991). In a study on cows that were used for nursing calves (Hunter and Jeffrey, 1975), an unexpected 18% of the quarters were infected with Strep. agalactiae.…”

Section: Resultssupporting

confidence: 90%

Effects of intramammary infection and parity on calf weaning weight and milk quality in beef cows.

Paape¹,

Duenas

Wettemann

et al. 2000

Journal of Animal Science

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The objectives of this study were to determine 1) the effect of intramammary infection on calf weaning weight, milk somatic cell count, and milk composition, and 2) the effect of parity on percentages of infected cows, infected quarters, and blind quarters. The number of infected quarters, milk somatic cell counts, milk components, and intramammary infection were studied at weaning in 164 beef cows. The percentage of infected cows ranged from 61.9% at first parity to 66.7% at fifth to ninth parities. Cows with three or four infected quarters had higher (P < .01) milk somatic cell counts than cows with zero, one, or two infected quarters. Among bacterial isolates, Staphylococcus aureus-infected quarters had the highest (P < .01) milk somatic cell count. Percentages of butterfat and lactose were lower (P < .01) in milk from infected quarters than from uninfected quarters. Infections by S. aureus and coagulase-negative staphylococci were the most common and accounted for 67 to 78% of the infections. Percentages of infected quarters and infections caused by S. aureus increased with parity (P < .01). Intramammary infections did not affect (P > .10) calf weaning weight. In conclusion, intramammary infection had no effect on calf weaning weight but increased milk somatic cell count and decreased the percentage of protein, lactose, solids-not-fat, and butterfat. The number of infected and blind mammary quarters increased with parity.

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Section: Resultssupporting

confidence: 90%

Effects of intramammary infection and parity on calf weaning weight and milk quality in beef cows.

Paape¹,

Duenas

Wettemann

et al. 2000

Journal of Animal Science

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“…In this study, as well as in other studies [2,9], both young and old cows were affected, but the prevalence increased with increasing parity. The most common IMI found were CNS and S. aureus, which is in line with previous studies [1,2,4,6,8,9]. …”

Section: Discussionsupporting

confidence: 92%

Udder health in beef cows and its association with calf growth

et al. 2014

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BackgroundStudies outside the Nordic countries have indicated that subclinical mastitis (measured by milk somatic cell count or the California Mastitis Test), intramammary infections (IMI), or blind quarters in beef cows may have negative effects on beef calf growth. Knowledge on prevalence of such udder health problems in Swedish beef cows is scarce. Therefore, the main aim of this study was to investigate subclinical mastitis, IMI and udder conformation in a number of beef cow herds. Production of β-lactamase in staphylococci was also investigated. Associations between certain cow factors and subclinical mastitis and IMI, and associations between cow and calf factors and 200 day calf weaning weight were also studied. The herds were visited once within a month after calving and once at weaning. Udder examination and quarter milk sampling, for somatic cell count and bacteriology, were performed in 8 to 12 cows per herd and occasion.ResultsApproximately 50%, 40% and 10% of the cows had subclinical mastitis, IMI, and at least one blind quarter, respectively, but the prevalence varied markedly between herds. Intramammary infections (mainly due to staphylococci) were identified in 13-16% of the milk samples. Less than 5% of the staphylococcal isolates produced β-lactamase. Approximately 11% of the cows sampled twice had the same IMI (mostly Staphylococcus aureus) at both samplings. Cow factors of importance for subclinical mastitis and/or IMI were teat and udder shape, breed, parity, presence of blind quarters, and cow hygiene. No significant associations were found between udder health parameters studied and calf weaning weights.ConclusionsSubclinical mastitis and IMI, but not blind quarters, were common in beef cows, but the prevalence varied markedly between herds. Most IMI were caused by staphylococci and more than 95% of those were sensitive to penicillin. Cows with large funnel-shaped teats or pendulous udder after calving, and cows with blind quarters were at risk of having subclinical mastitis and/or IMI. Poor hygiene was also a risk factor for udder health problems. No significant associations were found between udder health and calf weaning weight. More studies on risk factors are warranted to improve advisory services on awareness and prevention of mastitis in beef cows.

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“…This is in agreement with other reports for beef cows (Newman et al, 1991;Simpson et al, 1995;Paape et al, 2000). Hunter and Jeffrey (1975) than 500 × 10 3 cells/mL, and 20% had SCC greater than 1,000 × 10 3 cells/mL. 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).…”

Section: Discussionsupporting

confidence: 92%

“…In our experiment, CMT scores of 2 and 3 for quarters without infection probably resulted from stage of lactation that samples were taken. Somatic cell counts are usually greatest during early and late lactation in dairy (Bodoh et al, 1976;Reneau, 1986) and beef cows (Wilson et al, 1971;Hunter and Jeffrey, 1975;Newman et al, 1991), and SCC may be elevated for up to 2 wk after parturition (Cullen, 1968;Natzke et al, 1972). We sampled at 8 to 14 d postpartum to evaluate CMT, whereas Newman et al (1991) took samples for CMT at 4 wk postpartum.…”

Section: Discussionmentioning

confidence: 99%

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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Subclinical mastitis in suckler cows

Cited by 8 publications

References 0 publications

Effects of intramammary infection and parity on calf weaning weight and milk quality in beef cows.

Effects of intramammary infection and parity on calf weaning weight and milk quality in beef cows.

Udder health in beef cows and its association with calf growth

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

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