The pure type of pulmonary arterial stenosis at the conus arteriosus was diagnosis in a hybrid cat 14 months old, which had been suffering from a fainting fit since about 6 months of age. Ventricular septal defect of type II of kirklin in the pars membranacea was found in a hybrid male cat 3 years and 5 months old at autopsy. It had been submitted to a clinic with chief complaints of coughing and swollen belly and died too soon to undergo any examination of the circulatory organs.
Six cattle were injected intramuscularly with 0.9 mg/kg (group I) or 1.5 mg/kg (group II) of xylazine. They became recumbent to take a milk fever-like position 3-14 and 3-8 minutesand could stand up 114-183 and 114-288 minutes after injection in groups I and II, respectively. Hypoesthesia, sinus bradycardia, inhibition of ruminal movement, and hypothermia occurred. It took 8-12 hours to regain normal health conditions. Laboratory tests gave noticeable abnormal results. Nevertheless, the large-dose administration of xylazine was not sodangerous for cattle.
An antigen for immunoduffusion of equine infectious anemia (EIA) formed many extraneous precipitin lines on agar gel when it reacted with sera from experimental horses Inoculated more than four times with an inactivated equine rhinopneumonitis vaccine. When these lines were remarkable, it was difficult or impossible to make an exact diagnosis of EIA. These lines disappeared completely when one-fourth volume of bovine serum was added to the test horse serum.
Two groups, 1 and 2, of broiler chicks were inoculated with avian infectious laryngotracheitis live virus vaccine at the age of 4 and 14 days, respectively. Mild reaction was noticed, but disappeared by 7 days after inoculation. Mean neutralizing antibody titer was 0.2-0.7 in group 1 and 0.5-1.1 in group 2 at the age of 40-70 days. There was a relationship between the neutralizing antibody titer and the rate of prevention of chicks from infection. When that titer exceeded 1.1, this rate was more than 80 per cent.