Using data on age at 100 kg of three pig breeds (Large White, Landrace and Duroc) the connectedness between herds in China was evaluated by the connectedness rating (CR) method. The results show that most herds in China have low average CR (0-3.59%) with other herds. In Large White, of the 36 herds analyzed there are 20 herds, which are connected with at least one other herd. In Landrace and Du...

The infection dynamics of bovine respiratory syncytial virus (BRSV) were studied in randomly selected Norwegian dairy herds. A total of 134 herds were tested twice, six months apart. The herds were classified as positive for BRSV if at least one animal between 150 and 365 days old tested positive for antibodies against BRSV, thereby representing herds that had most likely had the virus present ...

A retrospective study was conducted in 2022 to determine the seroprevalence of brucellosis and its risk factors among goat sheep herds Karenga district, Karamoja region, Uganda. Sera from 332 goats 81 20 kraals all seven administrative units district were tested using modified Rose Bengal test (mRBT). It determined that present 20% small ruminant with an overall animal level seropositivity 3.39...

BACKGROUND Infections with bovine respiratory syncytial virus (BRSV) and bovine coronavirus (BoCV) are endemic to the cattle populations in most countries, causing respiratory and/or enteric disease. It has been demonstrated that herds can remain free from these infections for several years also in high prevalence areas. Organically managed (OM) dairy herds have been shown to have lower seropre...

The Danish Salmonella program for pigs and pork has been running for 20 years, and has resulted in a 90 % reduction of human cases attributed to Danish pork from 1993 to 2012 (Anonymous, 2013). The development in prevalence in breeding herds, sow herds, finisher herds and at carcass level was analysed as part of the ongoing preparations for the fifth Danish Salmonella plan for pigs and pork, wh...

The objectives of this study were to determine changes in herd productivity and the performance of female pigs over time in commercial swine herds. Annual measurement data from 1999 to 2003 were obtained from the record files of 113 herds in Japan. Two groups were formed according to the 25th percentile of pigs weaned/mated females per year (PWMFY) in 2003; the 2 groups were high-performing her...

ELISA FOR THE DIAGNOSIS AND EPIDEMIOLOGY OF BRUCELLA ABORTUS INFECTION IN CATTLE IN CHILE. A serum bank of 1251 adult cows sera was prepared. The sera originated from animals of three different epidemiological groups: 1) 244 from infected cows, strain 19 vaccinated when calves; 2) 507 from herds free of infection but all cows were strain 19 vaccinated when calves and 3) the last group, 500 sera...

BACKGROUND The study's objective was to evaluate the ability of fecal culture (FCUL) and fecal PCR (FPCR) to identify dairy goat and dairy sheep shedding Mycobacterium avium ssp. paratuberculosis. A cross-sectional study of the small ruminant populations was performed in Ontario, Canada between October 2010 and August 2011. Twenty-nine dairy goat herds and 21 dairy sheep flocks were visited, an...