Pathogen group specific risk factors at herd, heifer and quarter levels for intramammary infections in early lactating dairy heifers

Piepers, Sofie; Peeters, Katrijn; Opsomer, G.; Barkema, Herman W.; Frankena, K.; Vliegher, Sarne De

doi:10.1016/j.prevetmed.2011.02.010

Cited by 72 publications

(85 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…aureus NIMI, although these studies performed straightforward analyses with-out accounting for clustering within the data or for any susceptibility within quarters, cows, or herds. Piepers et al (2011) found a protective effect for CNS colonizing the teat apex; this result is different from an actual IMI caused by CNS, although these researchers did account for cow-and herd-level clustering. Lam et al (1997) found evidence of higher rates of infection with Staph.…”

Section: Minor Pathogensmentioning

confidence: 83%

Evaluation of minor pathogen intramammary infection, susceptibility parameters, and somatic cell counts on the development of new intramammary infections with major mastitis pathogens

Reyher

Dohoo

Scholl

et al. 2012

Journal of Dairy Science

View full text Add to dashboard Cite

Section: Minor Pathogensmentioning

confidence: 83%

Evaluation of minor pathogen intramammary infection, susceptibility parameters, and somatic cell counts on the development of new intramammary infections with major mastitis pathogens

Reyher

Dohoo

Scholl

et al. 2012

Journal of Dairy Science

View full text Add to dashboard Cite

“…Two surprising findings in the current study were the association of frequency of adding fresh bedding to calf hutches and the use of residual fly sprays with reduced CTX-M E. coli prevalence (Table 5). Lack of fly control is an established risk factor for infections on dairy farms (42,43), and residual sprays provide longlasting insecticide activity. Relatively few farms (5 of 30 [16.7%]) reported adding fresh bedding to calf hutches weekly or more frequently, but the difference in prevalence was large enough to be statistically significant, even with this relatively small sample size.…”

Section: Fig 2 Prevalence Of Samples That Yielded E Coli Isolates Pomentioning

confidence: 99%

Recent Emergence of Escherichia coli with Cephalosporin Resistance Conferred by bla _CTX-M on Washington State Dairy Farms

Davis

Sischo

Jones

et al. 2015

Appl Environ Microbiol

View full text Add to dashboard Cite

c Enterobacteriaceae-associated bla CTX-M genes have become globally widespread within the past 30 years. Among isolates from Washington State cattle, Escherichia coli strains carrying bla CTX-M (CTX-M E. coli strains) were absent from a set of 2008 isolates but present in a set of isolates from 2011. On 30 Washington State dairy farms sampled in 2012, CTX-M E. coli prevalence was significantly higher on eastern than on northwestern Washington farms, on farms with more than 3,000 adult cows, and on farms that recently received new animals. The addition of fresh bedding to calf hutches at least weekly and use of residual fly sprays were associated with lower prevalence of CTX-M E. coli. In Washington State, the occurrence of human pathogens carrying bla CTX-M genes preceded the emergence of bla CTX-M -associated E. coli in cattle, indicating that these resistance determinants and/or their bacterial hosts may have emerged in human populations prior to their dissemination to cattle populations. E mergence and dissemination of antibiotic resistance traits in Gram-negative bacteria can occur rapidly and across wide geographic distances (1). Bacterial strains carrying the bla CTX-M family of extended-spectrum ␤-lactamase (ESBL) genes have spread globally in less than 30 years (2, 3). Unlike other families of ESBL genes which result from point mutations in preexisting, narrower-spectrum ␤-lactamase genes (bla TEM-1 and bla SHV ) (4), bla CTX-M ␤-lactamase genes originated from chromosomal genes of Kluyvera species (2). The earliest Escherichia coli plasmid-associated bla CTX-M was detected from laboratory dogs used in pharmaceutical research in Japan in 1986, followed by isolations from human patients in Munich, Germany (1989), Argentina (1989), France (1989), and Poland (1996) (2). In North America, bla CTX-Mbearing Escherichia coli strains (CTX-M E. coli strains) were detected in humans in Canada in 2000 (5) and in the United States between 2001 and 2002 (6). By 2007 in the United States, 80% of 15 geographically dispersed medical centers reported E. coli or Klebsiella pneumoniae infections with associated bla CTX-M genes (7). In Washington State, the earliest reported clinical human E. coli strain carrying bla CTX-M was isolated in 2001 in Seattle (6). Currently, CTX-M enzymes are considered the most prevalent ESBLs in isolates of E. coli, K. pneumoniae, and Proteus mirabilis associated with human infections globally (8).In the United States, dairy cattle-associated CTX-M E. coli strains were first reported by Wittum and others in Ohio in 2009 (9). This Ohio research group later reported CTX-M in Salmonella enterica isolates from equine, swine, and turkey sources from six different states (10) and from swine finishing barns in 5 states (11). In the current study, we first tested E. coli isolates from Washington State dairy cattle banked from several earlier research projects to determine the time window of CTX-M E. coli emergence in this region and host species. The results of this retrospective study indicated rece...

show abstract

“…Therefore, heifer mastitis may have other etiology than mastitis in multiparous cows. Previously, risk factors such as feeding concentrates, housing, proportion of heifers with mastitis, and using restraint measures during milking, fly control strategy, contact with lactating cows before calving, and udder edema before calving were already identified in Sweden and Belgium (Svensson et al, 2006;Piepers et al, 2011). However, to what extent those risk factors may be applied to the farming system in the Netherlands is unknown.…”

Section: Introductionmentioning

confidence: 99%

Incidence of subclinical mastitis in Dutch dairy heifers in the first 100 days in lactation and associated risk factors

Santman-Berends

Riekerink

Sampimon

et al. 2012

Journal of Dairy Science

View full text Add to dashboard Cite

Heifer mastitis is a problem and risk factors may differ between heifers and older cows. The aim of this study was to estimate the heifer subclinical mastitis (HSCLM) incidence based on elevated somatic cell count (SCC) in the first 100 d in lactation and the associated risk factors in Dutch dairy herds. In 2008, 173 farmers filled in a questionnaire regarding housing and herd management factors potentially related to udder health. In addition, monthly milk production and SCC data from all cattle were provided by the Dutch Royal Cattle Syndicate (CRV, Arnhem, the Netherlands). Heifer subclinical mastitis incidence was calculated at the herd level as the number of heifer cases divided by the number of heifers at risk in the first 100 d in milk. Linear regression models were used for the analyses. On average, 25.5% [95% confidence interval (CI): 23.9 to 27.0%] of the heifers had subclinical mastitis. Heifers with a high SCC (>150,000 cells/mL) on the first test day after calving that returned to SCC levels below the cut-off continued to have a higher SCC throughout the study period compared with heifers with a low SCC (≤150,000 cells/mL) at the first test day after calving. Housing heifers together with lactating cows close to calving was protective from HSCLM incidence compared with separate housing (−4.5%; 95% CI: −8.7 to −0.2%). In addition, herds in which the farmer removed supernumerary teats of calves had a 7.0% (95% CI: 2.8 to 11.3%) lower HSCLM incidence and day and night grazing was also protective (−5.9%; 95% CI: −10.6 to −1.3%). Herds that were milked with an automatic milking system had, on average, a 6.9% (95% CI: 2.2 to 11.5%) higher HSCLM incidence and submitting milk samples for bacteriological culturing in the previous year was also associated with a higher HSCLM incidence (4.1%; 95% CI: 1.1 to 7.1%). Heifer subclinical mastitis is prevalent in all dairy herds, with a large variation in incidence. A high SCC in heifers at the first test day after calving appears to indicate a prolonged effect on udder health. Several management factors were found to be associated with HSCLM incidence that may help in reducing HSCLM.

show abstract

Pathogen group specific risk factors at herd, heifer and quarter levels for intramammary infections in early lactating dairy heifers

Cited by 72 publications

References 37 publications

Evaluation of minor pathogen intramammary infection, susceptibility parameters, and somatic cell counts on the development of new intramammary infections with major mastitis pathogens

Evaluation of minor pathogen intramammary infection, susceptibility parameters, and somatic cell counts on the development of new intramammary infections with major mastitis pathogens

Recent Emergence of Escherichia coli with Cephalosporin Resistance Conferred by bla _CTX-M on Washington State Dairy Farms

Incidence of subclinical mastitis in Dutch dairy heifers in the first 100 days in lactation and associated risk factors

Contact Info

Product

Resources

About

Pathogen group specific risk factors at herd, heifer and quarter levels for intramammary infections in early lactating dairy heifers

Cited by 72 publications

References 37 publications

Evaluation of minor pathogen intramammary infection, susceptibility parameters, and somatic cell counts on the development of new intramammary infections with major mastitis pathogens

Evaluation of minor pathogen intramammary infection, susceptibility parameters, and somatic cell counts on the development of new intramammary infections with major mastitis pathogens

Recent Emergence of Escherichia coli with Cephalosporin Resistance Conferred by bla CTX-M on Washington State Dairy Farms

Incidence of subclinical mastitis in Dutch dairy heifers in the first 100 days in lactation and associated risk factors

Contact Info

Product

Resources

About

Recent Emergence of Escherichia coli with Cephalosporin Resistance Conferred by bla _CTX-M on Washington State Dairy Farms