English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Background    Mycoplasma  mastitis is increasingly posing significant impact on dairy industry. Although the effects of major conventional mastitis pathogens on milk components has been widely addressed in the literature, limited data on the effects of different  Mycoplasma  and  Acholeplasma  spp. on milk quality and quantity is available. The aim of this study was to determine the casual relationship of  Mycoplasma  spp. and  A. laidlawii  to mastitis and compare them to subclinical mastitis caused by conventional mastitis pathogens from a single dairy herd in South Australia;  Mycoplasma  spp. and  A. laidlawii  were detected using PCR applied directly to milk samples. The herd had mastitis problem with high somatic cell count and low response rate to conventional antimicrobial therapy. A total of 288 cow-level milk samples were collected aseptically and used in this study.    Results  Conventional culture showed a predominance of coagulase-negative staphylococci, followed by coagulase-positive staphylococci,  Streptococcus  spp.,  Enterococcus  spp.,  E. coli , and  Klebsiella  spp. PCR results showed a high prevalence of mycoplasmas (76.7%), including  A. laidlawii  (10.8%),  M. bovis  (6.2%),  M. bovirhinis  (5.6%),  M. arginini  (2%), and (52.1%) of cows were co-infected with two or more  Mycoplasma  and  Acholeplasma  species.  Mycoplasma  co-infection significantly increased somatic cell counts (SCC) similar to conventional mastitis pathogens and compared to non-infected cows with 389.3, 550.3 and 67.3 respectively; and decreased the milk yield with 29.0, 29.9 and 34.4 l, respectively.  Mycoplasma  co-infection caused significant increase in protein percentage, and significant decrease in fat percentage and total milk solids, similar to other conventional mastitis pathogens. In contrast, changes in milk composition and yield caused by various individual  Mycoplasma  species were non-significant.    Conclusions    Mycoplasma  mastitis had on-farm economic consequences similar to common conventional mastitis pathogens. Results of our study indicate that co-infection  Mycoplasma  mastitis caused similar effect on milk composition to other mastitis pathogens and we hope these findings raise the awareness of the importance of their detection on routine diagnostic panels.

Evaluation of effects of Mycoplasma mastitis on milk composition in dairy cattle from South Australia