Publications by authors named "M J Jelinski"
Article Synopsis
- * This study analyzed the skin microbiota of active DD lesions in cattle from three feedlots, using swab samples from lesions at different stages (M2 and M4.1) and from healthy feet (M0).
- * The results showed that the bacterial communities in M2 and M4.1 lesions were distinct from healthy skin but similar to each other, indicating a significant shift in bacterial diversity as the infection progressed.
An increase in chronic, non-responsive bovine respiratory disease (BRD) infections in North American feedlot cattle is observed each fall, a time when cattle are administered multiple antimicrobial treatments for BRD. A number of factors are responsible for BRD antimicrobial treatment failure, with formation of biofilms possibly being one. It is widely accepted that biofilms play a role in chronic infections in humans and it has been hypothesized that they are the default lifestyle of most bacteria.
View Article and Find Full Text PDFAntimicrobials are crucial for treating bovine respiratory disease (BRD) in beef feedlots. Evidence is needed to support antimicrobial use (AMU) decisions, particularly in the early part of the feeding period when BRD risk is highest. The study objective was to describe changes in prevalence and antimicrobial susceptibility of BRD bacterial pathogens at feedlot processing (1 day on feed (1DOF)), 12 days later (13DOF), and for a subset at 36DOF following metaphylactic antimicrobial treatment.
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- Digital dermatitis (DD) in feedlot cattle is a growing concern, and this study analyzed over 1.2 million health records from western Canadian cattle to determine risk factors associated with the disease from 2014 to 2018.
- Cattle sourced from confined background operations (CB) have more than double the risk (IRR = 2.08) of developing DD compared to those from auction markets (AM), while ranch direct (RD) cattle show significantly lower risk (IRR = 0.02).
- The study found that female cattle are at a higher risk of DD than males, with varying incidences based on the year, and that smaller capacity feedlots (SCF) have a lower risk of
Article Synopsis
- - Lameness in feedlot cattle is a significant health issue impacting welfare and economics, often caused by hoof lesions like digital dermatitis (DD) and foot rot (FR), which can occur individually or together (DD + FR).
- - A study involving 208 hoof swabs from southern Alberta feedlots found that bacterial diversity was lower in DD and FR lesions compared to healthy skin, and these lesions presented distinct bacterial communities with specific genera identified for each type.
- - The research indicates that the composition of bacterial communities varies based on the type of hoof lesion, suggesting that 16S amplicon sequencing is a valuable method for studying these infections and may help in understanding their complex bacterial causes.