A cow recovered from acute mastitis of unidentified etiology after treatment with antibiotics. About 4 months later, she suffered again from acute mastitis. Cultivation of milk was negative and no treatment with antibiotics effective. Candida tropicalis was detected from a milk sample collected 10 days after infusion of the udder with antibiotics. The sample contained heavy clots and more than 23 million cells per ml. The severe symptoms gradually dissipated with no medication, but by the repetition of milking procedure. Bacteriological examination performed 46 days after the detection of C. tropicalis revealed the disappearance of this organism, as well as other bacteria, together with a marked decrease in cell count.
In the jurisdiction of the health center at Konan, Aichi Prefecture, rabies inoculation was performed on 83.7 per cent of the dogs registered. There was a highly significant relationship between the season and the frequency of occurrence of dog bites. Non-registered dogs were responsible for 50.8per cent of the total dog bites, and mongrel dogs for 73.0 per cent. Male dogs gave more bites than female ones.
In young ducks injected with serum derived from a duck having tolerated the attack by duck viral hepatitis (DVH), the neutralizing-antibody titer (NAT) was the highest immediately after the injection and the antibody disappeared during the 3rd week after the injection. In ducks kept in such area as involved in an outbreak of DVH, NAT began to rise about 20 days after hatching, reached its highest value about 70 days, and remained at a level of more than 2.0. Seven-day-old young hatched from eggs laid by ducks showing a high NAT were proved to have almcst as high an NAT as these ducks. This finding indicates that the antibody of a duck was transferred to its young through eggs.
The toxoplasmosis-positive rate was 15.8 per cent among boars and sows in the areas where the present survey was conducted. The older a swine herd, the higher was the positive rate. It was slow for a herd to turn to positivity. There was no difference in sensitivity between Middle Yorkshires and Landraces. The positive rate was 12.9 per cent among sows and 21.2 per cent among boars in the same age group of 4 to 32 months. There was a great difference in positive rate between a clean and a contaminated area. This result suggests a close relationship of the mode of transmission to contaminated environments and the pedigree of swine.