Survey on mastitis caused by environmental bacteria

Howell, D.G.

doi:10.1136/vr.90.23.654

Cited by 25 publications

(14 citation statements)

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“…). Pseudomonas aeruginosa is a major aetiologic agent causing mastitis in dairy herds and is one of the most prevalent bacteria cultured from bovine milk associated with clinical mastitis (Howell ; Barkema et al . ).…”

Section: Introductionmentioning

confidence: 99%

Characterization of antibiotic and disinfectant susceptibility profiles amongPseudomonas aeruginosaveterinary isolates recovered during 1994-2003

et al. 2014

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Section: Introductionmentioning

confidence: 99%

Characterization of antibiotic and disinfectant susceptibility profiles amongPseudomonas aeruginosaveterinary isolates recovered during 1994-2003

et al. 2014

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“…have been implicated in bovine mastitis and in two reports have been estimated to account for approximately 9-12% of all naturally acquired Gram-negative bacterial infections [19,56]. Of those species of Serratia that cause mastitis, S. marcescens is the most prevalent [55].…”

Section: Introductionmentioning

confidence: 99%

Innate immune response to intramammary infection with Serratia marcescens and Streptococcus uberis

et al. 2004

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-Streptococcus uberis and Serratia marcescens are Gram-positive and Gram-negative bacteria, respectively, that induce clinical mastitis. Once initial host barrier systems have been breached by these pathogens, the innate immune system provides the next level of defense against these infectious agents. The innate immune response is characterized by the induction of proinflammatory cytokines, as well as increases in other accessory proteins that facilitate host recognition and elimination of the pathogens. The objective of the current study was to characterize the innate immune response during clinical mastitis elicited by these two important, yet less wellstudied, Gram-positive and Gram-negative organisms. The pro-inflammatory cytokine response and changes in the levels of the innate immune accessory recognition proteins, soluble CD14 (sCD14) and lipopolysaccharide (LPS)-binding protein (LBP), were studied. Decreased milk output, induction of a febrile response, and increased acute phase synthesis of LBP were all characteristic of the systemic response to intramammary infection with either organism. Infection with either bacteria similarly resulted in increased milk levels of IL-1β, IL-8, IL-10, IL-12, IFN-γ, TNF-α, sCD14, LBP, and the complement component, C5a. However, the duration of and/or maximal changes in the increased levels of these inflammatory markers were significantly different for several of the inflammatory parameters assayed. In particular, S. uberis infection was characterized by the sustained elevation of higher milk levels of IL-1β, IL-10, IL-12, IFN-γ, and C5a, relative to S. marcescens infection. Together, these data demonstrate the variability of the innate immune response to two distinct mastitis pathogens. cytokines / innate immunity / mastitis / Serratia / Streptococcus

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“…7,8 In cattle, B cereus is considered a common contaminant in milk sample cultures 9,10 ; however, clinical cases of gangrenous mastitis due to this bacterium have been reported [11][12][13][14] but are considered rare. 10,15 The relatively low occurrence of B cereus mastitis in the face of a fairly wide host and environmental distribution of Bacillus sp 12,16 has suggested that specific predisposing factors may be required for the development of clinical mastitis due to B cereus. 17 Sources of infection that have been implicated in bovine cases include contaminated intramammary antimicrobial preparations, teat tubes, syringes, and teat dilators.…”

Section: Discussionmentioning

confidence: 99%

“…13 Contamination of intramammary products has been reported for other organisms, most notably Pseudomonas spp. 18 Associations with bedding materials such as chaff 15 and feeds such as brewers grains 12 were suggested to be predisposing causes of bovine B cereus mastitis; however, in 1 report, 19 no specific inciting cause was identified in a pastured dairy cow with B cereus mastitis. In reported Bacillus mastitis cases in cattle associated with intramammary products, the mastitis occurred from a few hours after calving 13,14 to 5 to 22 weeks after calving.…”

Section: Discussionmentioning

confidence: 99%