Mycoplasma bovis Infections in Young Calves

A new predilection site of Mycoplasma bovis: Postsurgical seromas in beef cattle

“…Within one animal the same 116 strain could be isolated from the udder, joints and the seromas (cows 4 and 6) (Figure 2). M. bovis is known to spread hematogenous from the lungs to the joints (Maunsell and Donovan, 2009). 128…”

“…This pathogen is highly contagious and a single clone can spread rapidly after introduction into 20 a naive herd (Soehnlen et al, 2012, Timsit et al, 2012. M. bovis has mainly been associated with 21 chronic unresponsive pneumonia, otitis and (peri)arthritis in calves (Maunsell and Donovan, 2009) and 22 with mastitis, arthritis and pneumonia in adult dairy cattle (Pfützner and Sachse, 1996) abortion and vesiculitis) (Pfützner and Sachse, 1996) and decubital abscesses over the brisket and 27 joints in calves (Kinde et al, 1993). Especially in chronic stages, the disease is characterized by a poor 28 response to antimicrobial agents which compromises animal welfare, increases antimicrobial use and 29 causes important economic losses such as weight loss, milk drop, loss of carcass quality, increased 30 mortality/culling risk and increased veterinary costs (Maunsell et al, 2011).…”

Mycoplasma Bovis Outbreak in a Herd of North American Bison (Bison Bison)

“…Reports in adult dairy cattle describe mastitis, with feeder and stocker cattle experiencing pneumonia and arthritis. 6 In comparison, the disease occurrence in bison appears to vary slightly. In the KS outbreak, the majority of affected bison were in the 5-10-year age group, whereas calves and 1-2-year-old bison were affected to a lesser degree.…”

Assessment of cow and farm level risk factors associated with Ureaplasma diversum in pasture-based dairy systems - A field study

“…The inclusion of the variable E. coli in the analysis also increased the odds of positivity to U. diversum in cows with +Mycoplasma spp., showing that the colonization of the vaginal mucosa with E. coli may favor the proliferation of U. diversum and mycoplasmas. When identifying E. coli in vaginal samples positive for U. diversum, a significant OR indicates an interaction between E.coli and the mollicutes, which has been previously reported for mollicutes and streptococci isolated from ulcerative lesions of the genital tract of equines (Spergser et al 2002) and Pasteurella multocida in lesions of respiratory disorders caused by mycoplasmas in cows (Maunsell and Donovan 2009). The synergism between Gram negative bacteria and the ureaplasmas may exist because of the protein similarity of their membranes (Brenner et al 1997).…”

“…Other potential routes of dissemination are embryo transfer (Britton et al 1988), contact between confined animals (Sanderson et al 2000) or contact between animals maintained in groups for reproductive management (Gambarini et al 2009), and during milking (Maunsell and Donovan 2009). Risk factors can be defined as the measurable characterization of diverse conditions that contribute to or increase the probability of a disease and can be related to the individual, the environment, or social media.…”