Twenty yearling sheep were allotted to four groups, each containing
five sheep of approximately equal weight. On experimental
days 0, 1, 2, 3, and 4, each sheep in each group was given the following
inoculations by stomach tube: five sheep in group I (Fasciola
hepatica-exposed controls) were given approximately 120...
The epidemiology of nematode infections in ewes and lambs on
irrigated pastures was investigated during one reproductive cycle
in a commercial operation in Central Oregon. Primary objectives
were to determine the sources of parasitism, the effect on lamb
weight gains, and the effectiveness of control procedures in minimizing
the detrimental...
Ten helminth-free sheep were given two doses of 10,000,
X-irradiated, H. contortus, third stage larvae 30 days apart. These
animals and a group of ten non-vaccinated sheep were challenged
with 50,000, normal, H. contortus, third stage larvae 60 days
following the second vaccination. Antibody levels were measured
in both groups...
Published March 1939. 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
White muscle disease or muscular dystrophy of sheep is a selenium
responsive malady common to many areas with an inherent natural
deficiency of selenium in the forage. The disease can be prevented in
lambs by adding trace amounts (approximately 0.1 ppm) of selenium to
the otherwise selenium deficient, forage fed...
A study was undertaken to determine the prevalence of virus infection in lambs undergoing respiratory tract disease (RTD). The investigation was divided into three study groups and consisted of lambs which were 4 to 5 months of age. In the first group (N=200), paired serum samples were taken from lambs...
The digestion responses and degradation of ergovaline and production of
lysergic acid in the rumen of sheep offered Neotyphodium coenophialum-infected
tall fescue straw at two ergovaline levels was investigated. Six crossbred wethers
(56 +1- 3 kg BW) were randomly assigned to one of two treatment groups in a
cross-over design....
Six 3 to 4 weeks old, cesarian-derived lambs were inoculated with ovine an adenovirus isolate 475N. Inoculated lambs showed moderate clinical signs of respiratory distress, conjunctivitis, and loose feces during the 10-day observation period. Virus was detected from nasal and conjunctival swabs starting on postinoculation day (PID) 2.
Virus was...
