The primary objective was to compare reported antimicrobial usage between conventional and organic dairy farms. A secondary objective was to contrast selected management characteristics of conventional and organic dairy herds. A questionnaire was administered on site to selected dairy farmers located in Michigan, Minnesota, New York, and Wisconsin. Organic herds (n = 32) were smaller and produc...

A surveillance program in which all cattle herds in Denmark are classified into Salmonella infection categories has been in place since 2002. Dairy herds were considered test negative and thus most likely free of infection if Salmonella antibody measurements were consistently low in bulk tank milk samples collected every 3 mo. Herds were considered test positive and thus most likely infected if...

from Operation-management factors associated with early-postnatal mortality of US foals, Losinger WC, Traub-Dargatz JL, Sampath RK, Morley PS, Preventive Veterinary Medicine, 47 (2000) 157-175, November 2000. Persistent BVD infection in US beef herds In 1996, testing for BVD persistent infection was carried out on 18,931 spring born calves in 128 beef herds. Of these herds, 76 were randomly sel...

Data of the 1997-1998 epidemic of classical swine fever (CSF) in The Netherlands were analysed in survival analysis to identify risk factors that were associated with the rate of neighbourhood infections. The study population consisted of herds within 1000 m of exclusively one previously infected herd. Dates of virus introduction into herds were drawn randomly from estimated probability distrib...

the importance of cats in the leptospira epidemiology is due to the possibility of transferring leptospirosis to wild and domesticated animals. the purpose of this survey was to determine the prevalence of leptospira infection in shorthair cats in different location of mashhad, iran. totally, 147 blood samples were taken from 42 (28.57%), 52 (35.37%) and 53 (36.05%) households, stray and cats w...

Some of the data required for this purpose are not recorded in the majority of commercial herds. From the fact that the herds studied kept more comprehensive records it can be reasonably assumed that the standard of management and the level of performance obtained in these herds were not typical of the industry at large. For the present study this could be considered an advantage since a furthe...

ndemic transmissible gastroenteritis (TGE) is defined as the persistence of the TGE virus (TGEV) and disease in a herd. Endemic infection is a common sequel to a primary outbreak in herds of more than 300 sows.1 In these herds, the main clinical findings are diarrhea, primarily in suckling piglets (from 6 days old to about 2 weeks after weaning); diarrhea among recently weaned pigs; and discret...

Aim: Monitoring was performed in order to determine the Selenium (Se) status of cattle herds in different agricultural areas in Wallonia (Belgium). Materials and Methods: The study included 114 heifers and 184 cows (82 dairy and 102 beef cows) from 66 cattle farms situated in Wallonia. The Se status was assessed by measuring the glutathion peroxydase in red cells and converting it to the equiva...

BACKGROUND Fasciola hepatica is a helminth parasite of global importance in livestock, with major economic impact. However information on F. hepatica infections in Irish pasture-based dairy herds is limited. Therefore this study was conducted in order to determine the prevalence, seasonality and management factors associated with F. hepatica. A total of 319 Irish dairy herds were selected for t...

BACKGROUND Body condition score and blood profiles have been used to monitor management and herd health in dairy cows. The aim of this study was to examine BCS and extended metabolic profiles, reflecting both energy metabolism and liver status around calving in high-producing herds with a high incidence of abomasal displacement and ketosis and to evaluate if such profiles can be used at herd le...