Environmental and managerial risk factors of intramammary infection with coagulase-negative staphylococci in Ohio dairy herds

Managerial and environmental determinants of clinical mastitis in Danish dairy herds

“…We did not detect significant associations with some previously identified risk factors such as herd size, amount of bedding or type of bedding materials. This was in contrast to a previous study in Ohio, USA [ 17 - 20 ]. This may be because of differences between Denmark and the USA, but may also be because the crude herd rate of CM in Denmark represents the composite of many contributory clusters of mastitis causation with different etiological agents.…”

Influence of Herd Environment on Health and Fertility and Their Relationship with Milk Production

“…For example, a farmer's attitude toward hygienic measures influences the incidence of mastitis (Barkema et al, 1999b), and the feeding system may influence the interval between calving and first insemination (Pryce et al, 1999). Such effects have been quantified by sending questionnaires or holding interviews to relate farmers' attitudes toward disease incidence (e.g., Bartlett et al, 1992;Barkema et al, 1998), and by applying different treatments within one experimental herd (e.g., Pryce et al, 1999). These are valuable approaches that can provide detailed answers to specific questions, but the scale is limited to the herd or group of herds analyzed, whereas animal breeding programs generally operate at a larger (e.g., national) scale.…”