Fetal adrenal weight increased with the progress of gestation, especially after the 7th month of gestation. The ratio of adrenal weight to body weight decreased with the progress of gestation. The cells of zona glomerulosa and zona fasciculata appeared in the 4th month and those of the zona reticularis in the 7th month of gestation. Fetal zone-like cortical tissue appeared beneath the inner fascicular zone in the 4th month. Sudanophilic lipid droplets were found in considerable abundance in both zona glomerulosa and zona fasciculata in the 4th month. They graduall increased in size in the following order: zona reticularis<zona fasciculata <zona glomerulosa. Fetal serum 11-01-ICS level increased with the progress of gestation, especially after the 8th month of gestation. The secretion and biosynthesis of the adrenocortical hormones by the fetal adrenal cortex began at 4-5 months of gestation. The fetal pituitary-adrenocortical function became maximum at the end of gestation. It was suggested that hyperfunction of the fetal pituitary-adrenocortical system near term might play an important role in the initiation of parturition in the cow.
A higher floating rate of canine hookworm eggs kept at 4°C was obtained from a single-chemical floating solution with a specific gravity of 1.10 than from a single-chemical floating solutoin with a higher specific gravity than this. When eggs of canine hookworm, canine whipworm, canine ascarides, Diphyllobothrium mansoni, and lung fluke were used, a higher floating rate wa. obtained mostly from a mixture of 2-4 chemicals with a specific gravity exceeding 1.23 than from any single-chemical floating solution. When liver fluke eggs was tested, a very low floating rate was obtained from a floating soultion consisting of sodium nitrate alone and a mixture of this chemical and sodium chloride, but a high floating rate was obtained from a floating solution composed of zinc sulfate or magnesium sulfate alone or composed of these chemicals.
Abnormal curvature of the thoracic vertebrae was found in 107 (6.9%) of 1, 555 swine studied in Hokkaido. A relatively high incisence was seen in some particular herds. The 4th to 14th thoracic vertebrae were involved. The apex of the curvature was present most frequently in the 8th and 9th one. The degree of curvature was 20 mm or less in a majority of those involved and 41 mm or more in a few. The corpus vertebrae became shorter in length. It was greater in width and height and the foramen vertebrae longer in diameter than those innormal swine.
In March and April, 1974, a type of dermatitis occurred to 238 piglets of 24 litters and 171 (59%) piglets died or were condemned. It presented symptoms quite similar to those of exudative darmatitis. Eczema and eruption extended from the hypogastric and auricular region to all over the body. Exudate was attached to the surface of the body, which turned to be dark brown in color. There was no difference in the serum protein fractions as determined by cellulose acetate membrane electrophoresis between the affected and healthy swine. Escherichia coli and Staphylococcus aureus were isolated from the skin lesions and parenchymatous organs of the affected swine.