Three sets of blood samples were taken from 532 beef calves of two populations at 24 to 48 h after birth, at an average age of 164 d (at time of vaccination for infectious bovine rhinotracheitis virus or IBRV) and at an average age of 224 d (60 d postvaccination)....
Mycobacterium avium subspecies paratuberculosis (MAP) is the causative agent of Johne's disease, a chronic inflammatory bowel disease that affects ruminant populations worldwide. The characteristic stages of the disease make diagnosis difficult, resulting in silent transmission among animals in a herd for years before proper detection of the infection. The extensive...
A two-year study was made of pastures suspected of inciting acute bovine pulmonary emphysema (ABPE) in east-central Oregon. Objectives of this study were (1) to determine the vegetation composition of these pastures, (2) to determine seasonal trends of tryptophan, crude protein, and nitrogen/sulfur ratios in selected pasture plants, (3) to...
Ensuring that calves receive adequate high-quality colostrum containing
antibodies within two to four hours of birth is key to preventing scours. There are a number of factors that influence the quantity and quality of colostrum the calf receives from the dam. These include:
• age of the dam
• precalving...
Green manures, soil solarization, and long rotations with crops not susceptible to Verticillium wilt are among the disease management tactics currently under investigation as alternatives to chemical fumigation of soil. The effect of a broccoli green manure on soil microsclerotial populations of three isolates of Verticillium dahliae and on Verticillium...
The biology, history and synonyms of
reviewed and the known distribution given.
Fascioloides magna were reviewed and the known distribution given. Studies have shown that Cervidae are the natural hosts and domestic
ruminants the accidental hosts. The parasite is reportedly
pathogenic to goats and sheep but causes severe tissue reactions...
Grazing on the mountainous forested ranges of the Camp Creek
Unit, Malhuer National Forest, was typified by irregular distribution
of free-ranging cattle. A combination of management and physical,
topographic constraints caused cattle to concentrate on the riparian
zone early in the grazing season in 1977 and 1978. A large percentage...
Published April 1966. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Published September 1966. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Published May 1980. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog