Treatment of subclinical mastitis (SCM) during lactation is rarely recommended due to concerns related both antimicrobial usage and costs associated with milk discard. Nisin a naturally produced peptide Gram-positive spectrum that, when given dairy cows, does not require We evaluated the economic impact treatment SCM early using nisin-based intramammary under different scenarios which included various costs, prices, cure rates. stochastically simulated dynamics detected first week lactation....

The purpose of this retrospective cohort study was to evaluate the effects timing hyperketonemia (HYK) diagnosis during early lactation on milk yield and composition, reproductive performance, herd removal. Plasma β-hydroxybutyrate (BHB) measured twice a week first 2 wk in 362 multiparous Holstein cows for HYK. In each week, were diagnosed as HYK positive (HYK+) if plasma BHB concentrations ≥1.2 mmol/L at least one tests evaluated. Milk-related outcomes (first 10 monthly tests) included...

Antimicrobials are used on dairy farms to treat bacterial infec­tions and most manage mastitis. The aim was de­scribe variation in antibiotic treatment protocols MI OH farms. We hypothesized that frequency, dosage dura­tion of treatments would vary among

This study aimed to characterize the highly pathogenic avian influenza (HPAI) hemagglutinin type 5 and neuraminidase 1 (H5N1) clade 2.3.4.4b outbreak in dairy cattle estimate effect of on health, productivity, economics at herd individual levels for 130 d from outbreak. Herd records a Michigan farm, confirmed as affected based PCR testing milk, were used this cohort study. Records included daily bulk tank information, management feed intake data, temperature alerts generated cows'...

Monitoring the body condition score (BCS) of dairy cows is a management strategy that can assist producers in decision-making. The BCS and its variations reflect level fat reserves mobilization throughout different stages lactation. Cows mobilize excessive amounts response to increased energy requirements transition period are more likely have higher beta-hydroxybutyrate (BHB) concentration blood, leading incidence hyperketonemia postpartum. In this study, our main objective was evaluate how...

Among various farm procedures, an appropriate milking routine is crucial for reducing mastitis and enhancing milk safety quality. However, inadequate compliance with routines remains a primary factor contributing to variability of quality among herds. Training workers essential ensuring routines, which directly impacts udder health. In this study, we aimed assess the impact training session on dairy workers' understanding routine, behavioral changes during milking, subsequent effects Farm (n...

Hyperketonemia (HYK) in early lactation can have a different impact on health and productivity depending the timing of HYK onset. While specific metabolites measured during dry period may serve as biomarkers HYK, correlations between represent challenge for use metabolic profiles dataset, little has been explored HYK. This exploratory cohort study aimed a) to characterize among late dairy cows, b) identify associated with onset at first (wk1) second (wk2) week lactation. Individual blood...

This study aims to evaluate the diagnostic accuracy of bovine specific beta-hydroxybutyrate (BHB) meter Nova Vet (NVET). We evaluated and agreement NVET in fresh blood thawed serum with reference laboratory assay; repeatability, interference by anticoagulants, optimum slope calibration factor. Individual samples were collected from 200 Holstein crossbred cows between 3 14 days post-calving 13 dairy herds Minnesota. Using a assay cut point 1.2 BHB mmol/L hyperketonemia prevalence was 10.6%...

The objective of this retrospective cohort study was to investigate whether the association hyperketonemia (HYK) with reproductive performance differs based on milk production during first week lactation (wk 1). Data between calving and 150 d in (DIM) from 2,091 Holstein dairy cows 5 commercial herds Minnesota were collected. concentration β-hydroxybutyrate (BHB) measured twice 3 10 DIM whole blood diagnose HYK (defined as BHB ≥1.2 mmol/L). average wk 1 yield classified into levels (low =...

Automated monitoring devices have become increasingly utilized in the dairy industry, especially for or predicting disease status. While multiple automated been developed prediction of clinical mastitis (CM), limitations performance applicability remain. The aims this study were to (1) detect variations reticuloruminal temperature (RRT) relative an experimental intramammary challenge with Streptococcus uberis and (2) evaluate alerts generated automatically based on variation RRT predict...

Lameness is an important welfare issue and a serious challenge in the dairy industry. Prevalence of lameness worldwide range from 8 to 55% influenced by genetics, housing type, herd management. Lame cows have reduced fertility hoof lesions (HL) are responsible for over 90% lameness. Hoof can be non-infectious such as sole ulcer, toe white line disease, hemorrhage, or infectious digital dermatitis foot rot. Association between HL scarce. Furthermore, information about association stage...

Hyperketonemia (HYK) is an early lactation metabolic disease frequently observed in high-producing dairy cattle and it has been associated with suboptimal reproductive performance, decreased milk yield, increase occurrence of other diseases, culling. The majority the reports so far focused on association HYK these outcomes during lactation, however, effect whole following lactations not as extensively characterized. Therefore, our primary objective was to evaluate occurring first 10 days...