has been a hotly debated issue in the US. The initial issue was the effect of drugs, chiefly antibiotics, on cheese manufacturing processes. Reports in the press highlighting contamination of milk and other dairy products with antibiotics and other animal drugs quickly raised the issue of food safety and resulted in the intervention of governmental agencies regulating the use of animal medicati...

ICAR Technical Series No 3 The MLB programme (Portuguese standing for Brazilian Milking Hybrid) is described below. This was a research and development programme conducted by the National Dairy Cattle Research Centre of the Federal Research Organisation (EMBRAPA) with the assistance of the FAO/UNDP Project BRA/79/010. Its main objective was to obtain experimental information to design selection...

Pavlata L. , A. Pechová, J . I l lek: Muscular Dystrophy in Dairy Cows Following a Change in Housing Technology. Acta Vet. Brno 2001, 70: 269–275. The objective of the study was to monitor the state of health (in particular damage to muscular tissues) in dairy cows suffering from a marked selenium deficiency. The investigations were conducted in a herd of Bohemian Red Pied cattle at the time of...

and cattle is caused by Brucella abortus, a bacterium introduced to the US via European livestock. B abortus was first detected in bison in Yellowstone National Park (YNP) in 1917 (Cheville et al. 1998), and in elk as early as 1930. In wildlife and cattle, uninfected animals contract the disease primarily by licking birth exudates of infected herd members; however, bacteria localize in a variet...

The calculation and publication of all dairy cattle genetic evaluations in Canada is the responsibility of Canadian Dairy Network (CDN). An 8-member board of directors, the majority being dairy producers, governs this non-profit national organization. Member organizations include all breed associations, milk recording agencies and artificial insemination centres across Canada as well as Dairy F...

While cattle in general have been identified as a reservoir of Escherichia coli O157:H7, there are limited data regarding the prevalence and clonality of this pathogen in downer dairy cattle and the potential impact to human health that may occur following consumption of meat derived from downer dairy cattle. In the present study, conducted at two slaughter facilities in Wisconsin between May a...

Triclabendazole (TCBZ) is the drug of choice for Fasciola hepatica control and reports of F. hepatica resistant to this drug from a wide range of geographic regions are very concerning. This study investigated the presence of TCBZ resistance in F. hepatica in naturally infected Australian beef and dairy cattle herds and evaluated methods of measuring the levels of resistance. Faecal egg count a...

Recently, it has been proposed on theoretical grounds that carrion odor from flowers may not only attract pollinators, but also repel mammalian herbivores. Two grazing experiments involving 16 to 26 cattle heads per year, one for eight years (1982-1989) and the other for seven (1994-2000), in a region with no large carnivores that could influence cattle behavior, show that cattle avoid areas wh...

Increasing feed costs and the desire to improve environmental stewardship have stimulated renewed interest in improving feed efficiency of livestock, including that of US dairy herds. For instance, USDA cost projections for corn and soybean meal suggest a 20% increase over 2010 pricing for a 16% protein mixed dairy cow ration in 2011, which may lead to a reduction in cow numbers to maintain pro...

Global trends in urbanization are increasing the spread of neglected zoonotic infections such as leptospirosis, and reducing the number of human cases of leptospirosis is best accomplished by controlling the infection in the animal reservoir. The aim of this study was to determine the seroprevalence of Leptospira borgpetersenii serovar Hardjo and L. interrogans serovar Hardjo (L. Hardjo) exposu...