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Mares’ milk composition as related to “foal heat” scours. A CONDITION known as “foal heat” scours often develops in young foals during the mare's first estrum, which usually commences about 9 days post-partum. Various causative factors that have been suggested, although not scientifically established, include: (1) Changes in milk composition during the heat period (Henry and Morrison, 1923; Linton, 1931; Holmes and Lindquist, 1947; Doll, 1956), (2) ingestation of genital discharge (Sohnie, 1910; Udall, 1943; Siegmond, 1961), (3) ingestation of straw, feces, grass and other foreign matter (Udall, 1943) and (4) overloading of the foal's digestive t...
Growth of the equine infectious anemia virus in a continuous-passage horse leukocyte culture. A continuous-passage horse leukocyte culture [V.B. 40, abst. 4672] was susceptible to the virus of equine infectious anaemia, as determined by cyto-pathic effect and viral titre. Ultrafiltration studies indicated that the virus was less than 32 mμ in diameter, which agrees with previous reports. Susceptible horses developed clinical signs and lesions of the disease when they were inoculated with both unfiltered and ultrafiltered culture virus.
Preparation and properties of smooth muscle myosin from horse esophagus. Myosin was prepared from smooth muscle of horse esophagus in good yield
(about 15 ° mg/Ioo g tissue) and was designated myosin S. Its properties were compared
with those of myosin A from skeletal muscle.
The ratio of the absorption of myosin S at 280 nm to that at 26o nm was about
1.8, and the amount of contaminating phosphorus was only o.91 g/io 5 g of myosin S,
indicating that the latter is free of nucleic acid. The purity of this protein was examined
by ultracentrifugation, gel filtration in the presence of 0.5 M KC1 and 6 M urea and
chromatography on DEAE-cellulose columns. These e...
The development and distribution of antilymphocytic and other antibodies in horses immunized with human lymphoid antigens. Serum samples were obtained at regular intervals from groups of horses immunized with peripheral blood lymphocytes, thoracic duct lymphocytes, or peripheral blood lymphocyte membranes. These sera were separated into the classical 19 S, 10 S, 7 S, and 4.5 S fractions by Sephadex gel filtration and the antibody activity (antilymphocytic or otherwise) of these fractions, and of the original sera, was assessed by standard in vitro procedures. The antilymphocytic activities measured included lymphocyte agglutination, lysis, and transformation. The other antibodies assayed were platelet and erythroc...
Surgical approaches to the abdomen in the horse. Surgical access to the abdomen of the horse is commonly required to treat disorders of the alimentary tract, for surgery of abdominally placed genital organs such as in cryptorchidectomy, caesarean section, and ovariectomy, and for surgery of the urinary bladder. The choice of the operative approach is determined by the likely location and nature of the surgical problem, the nature of the patient, facilities available, economic considerations, and the familiarity of the surgeon with the different techniques.
The abdominal cavity is the largest body cavity in the horse, which means that expo...
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