Prevalence and aetiology of clinical mastitis on dairy farms in Devon

Milne, MH; Barrett, David C; Fitzpatrick, J. L.; Biggs, Andrew G.

doi:10.1136/vr.151.8.241

Cited by 26 publications

(22 citation statements)

References 10 publications

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“…However, out of the Streptococcus strains isolated from cows with mastitis, 70 per cent were identified as S uberis . This high prevalence has already been described elsewhere (Bradley 2002, Milne and others 2002). …”

Section: Discussionsupporting

confidence: 80%

Cross‐sectional study of Streptococcus species in quarter milk samples of dairy cows in the canton of Bern, Switzerland

et al. 2010

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A total of 2538 quarter milk samples from 638 lactating dairy cows from 47 farms in the canton of Bern, Switzerland, were investigated for streptococci. A novel, simple and inexpensive laboratory method was used for the differentiation of Streptococcus species, and a risk factor analysis was carried out. The prevalence in the quarter milk samples was 0.2 per cent for Streptococcus agalactiae, 1.3 per cent for Streptococcus uberis, 1.3 per cent for Streptococcus dysgalactiae, 0.1 per cent for Enterococcus species and 2.9 per cent for minor Streptococcus species (designated Streptococcus-Lactococcus-Enterococcus [SLE] group). Based on the somatic cell count (SCC), S uberis and S dysgalactiae were classified as 'major' pathogens and the bacteria in the SLE group as 'minor' pathogens. For S uberis, S dysgalactiae and bacteria in the SLE group, the most significant risk factor was an intramammary infection (IMI) of a neighbouring quarter by the same pathogen. Other significant risk factors for S uberis infection were a positive California Mastitis Test (CMT) result and a SCC of more than 100,000 cells/ml. Significant risk factors for IMI with S dysgalactiae were a positive CMT result, teat injury and palpable abnormalities in the udder. Infection with bacteria in the SLE group was significantly associated with a SCC of more than 100,000 cells/ml, a lactation number of more than 2, the right rear quarter (as the location of infection) and a positive CMT result.

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Section: Discussionsupporting

confidence: 80%

Cross‐sectional study of Streptococcus species in quarter milk samples of dairy cows in the canton of Bern, Switzerland

et al. 2010

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“…The relative high prevalence of S. aureus in this study could be associated with lack of (100) 86 (100) effective udder washing, hand washing before milking, use of separate towel, post milking teat dipping and disinfection routine milking area. Kerro and Tareke (2003) indicated 40.5% S. aureus prevalence in southern Ethiopia and 44.4% in Sebeta Miline et al (2002) which are higher than the present finding. The result of coagulase negative staphylococcus (CNS) in present study accounted 23.2%, which is lower than 42% (Hussien, 1999) and 46% (Gizat et al, 2004) findings.…”

Section: Bacterial Isolation and Identificationcontrasting

confidence: 74%

“…The result of coagulase negative staphylococcus (CNS) in present study accounted 23.2%, which is lower than 42% (Hussien, 1999) and 46% (Gizat et al, 2004) findings. However, it is higher than 10% prevalence reported (Miline, 2002). CNS is regarded as minor pathogen and normally considered as normal inhabitants of bovine udder (Gentilini et al, 2002).…”

Section: Bacterial Isolation and Identificationmentioning

confidence: 82%

Microbiological study on bacterial causes of bovine mastitis and its antibiotics suscebtibility patterns in East Showa Zone, Akaki District, Ethiopia

Belayneh¹,

Belihu²,

Tesfaye³

2014

J. Vet. Med. Anim. Health

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The study was conducted during September, 2008 to 2009 in East Showa Zone, Akaki district to determine the prevalence of mastitis, identify risk factors, isolate and identify major bacterial causes and conduct in-vitro antimicrobial susceptibility test. Forty six (46) small holder dairy farms and 200 dairy cows were selected by one stage cluster sampling. Questionnaire survey, farm inspection and clinical examination of cows were used to collect data. Milk samples which were positive on california mastitis test (CMT) was collected aseptically using sampling bottles and transported to veterinary microbiology laboratory at Addis Ababa University, Faculty of veterinary medicine for bacteriological study. The prevalence of clinical mastitis at herd, cow and quarter level accounted 17.3, 3.0 and 1.2%, respectively whereas 60.8% herd, 25.0% cow and 12.7% at quarter level during subclinical mastitis. Major bacterial isolates in subclinical mastitis include Staphylococcus aureus (38.9%), coagulase negative Staphylococcus (23.4%), Bacillus spp. (10.4%), Escherichia coli (7.8%), Streptococcus agalactiae (6.5%), Streptococcus dysgalactiae (1.3%), Staphylococcus uberis (1.3%) and Staphylococcus intermidius (5.2%). Likewise during clinical mastitis, S. agalactiae and S. aureus accounted (33.3%) and (22.2%), respectively. Univariate logistic regression indicated that stage of lactation, parity number, teat lesion and milking mastitic cow at last had significant effect (p < 0.05) on prevalence of mastitis. The in vivo antimicrobial sensitivity tests showed that gentamicin, kanamycin, chloramphenicol and vancomycin were the most effective antibiotics, followed by streptomycin and penicillin; bacitracin, polymxin and amoxicillin were least effective drugs.

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“…aureus, also cause subclinical mastitis (Barkema et al, 2006;Koivula et al, 2007). Distribution of the most common species varies among countries and herds, and is apparently linked with management practices and environmental factors in particular countries and herds (Barkema et al, 1999;Milne et al, 2002;Bradley et al, 2007;Olde Riekerink et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Factors associated with intramammary infection in dairy cows caused by coagulase-negative staphylococci, Staphylococcus aureus, Streptococcus uberis, Streptococcus dysgalactiae, Corynebacterium bovis, or Escherichia coli

Taponen

Liski

Heikkilä

et al. 2017

Journal of Dairy Science

104

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The aim of this study was to determine risk factors for bovine intramammary infection (IMI) associated with the most common bacterial species in Finland. Large databases of the Finnish milk-recording system and results of microbiological analyses of mastitic milk samples from Valio Ltd. (Helsinki, Finland) were analyzed. The study group comprised 29,969 cows with IMI from 4,173 dairy herds. A cow with a quarter milk sample in which DNA of target species was detected in the PathoProof Mastitis PCR Assay (Thermo Fisher Scientific, Waltham, MA) was determined to have IMI. Only cows with IMI caused by the 6 most common pathogens or groups of pathogens, coagulase-negative staphylococci (CNS), Staphylococcus aureus, Streptococcus uberis, Streptococcus dysgalactiae, Corynebacterium bovis, and Escherichia coli, were included. The control group comprised 160,176 IMI-free cows from the same herds as the study group. A multilevel logistic regression model was used to study herd-and cow-specific risk factors for incidence of IMI. Pathogen-specific results confirmed those of earlier studies, specifically that increasing parity increases prevalence of IMI regardless of causative pathogen. Holsteins were more susceptible to IMI than Nordic Reds except when the causative pathogen was CNS. Occurrence of IMI caused by C. bovis was not related to milk yield, in contrast to IMI caused by all other pathogens investigated. Organic milk production was associated with IMI only when the causative pathogen of IMI was Staph. aureus; Staph. aureus IMI was more likely to occur in conventional than in organic production. Cows in older freestall barns with parlor milking had an increased probability of contracting an IMI compared with cows in tiestall barns or in new freestall barns with automatic milking. This was the case for all IMI, except those caused by CNS, the prevalence of which was not associated with the milking system, and IMI caused by Staph. aureus, which was most common in cows housed in tiestall barns. A better breeding index for milk somatic cell count was associated with decreased occurrence of IMI, indicating that breeding for improved udder health has been successful in reducing the incidence of IMI caused by the most common pathogens in Finland. In the Finnish dairy sector, the importance of other measures to control IMI will increase as the Holstein breed progressively takes the place of the Nordic Red breed. Attention should be paid to hygiene and cleanliness, especially in old freestall barns. Based on our results, the increasing prevalence of automatic milking is not a reason for special concern.

show abstract

Prevalence and aetiology of clinical mastitis on dairy farms in Devon

Cited by 26 publications

References 10 publications

Cross‐sectional study of Streptococcus species in quarter milk samples of dairy cows in the canton of Bern, Switzerland

Cross‐sectional study of Streptococcus species in quarter milk samples of dairy cows in the canton of Bern, Switzerland

Microbiological study on bacterial causes of bovine mastitis and its antibiotics suscebtibility patterns in East Showa Zone, Akaki District, Ethiopia

Factors associated with intramammary infection in dairy cows caused by coagulase-negative staphylococci, Staphylococcus aureus, Streptococcus uberis, Streptococcus dysgalactiae, Corynebacterium bovis, or Escherichia coli

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