[Commercial method of aerogenic immunization of pigs against swine fever]. / Promishlen metod ze aerogenno imunizirane na praseta protiv chuma.

An industrial method is presented through a model with a chamber for aerogenic immunization of about 250 pigs, aged 2.5 months. The experiments were carried out with more than 1,000 pigs of the Camborough hybrid under industrial conditions of raising. The process of immunization was feasibly carried out when the pigs passed through the chamber using aerosol at mixing them upon transference from the growing section to the fattening one, according to the provisions of the raising technology. A lapinized K-vaccine against fever, obtained from rabbits or tissue cultures was used in a dispersed state. Essential proved the high titer of the vaccine. Used were the aerosol devices DAG-2 or Microjet Fogmaster mounted at 1.5 m above the chamber floor. They guarantee the production of highly dispersed aerosol of an average arithmetic size of 7-10 microns, its concentration reaching 3,000,000 particles per 1 cm3. The animals were exposed for 30 min with Fogmaster and 45 min with DAG-2. It was shown that they tolerated perfectly this group immunization. A single procedure with the vaccine conferred immunity at 2.10(5) LT50 and protected the pigs from fever over the entire fattening period. The method was evaluated as a biotechnology.

[Studies of the etiology of cystopyelitis in hybrid swine]. / Prouchvaniia vurkhu etiologiiata na tsitopielitite po khibridnite svine

Studies were carried out on the etiology, clinical picture, morphologic changes, and methods of prophylaxis of the cystopyelitis in hybrid pigs. It was established that in the cases studied the etiologic part is most probably played by Escherichia coli having pronounced virulence for albino mice. Clinically the disease was manifested with hematuria--the cardinal diagnostic symptom; histologically there were nephritis, pyelonephritis, and strong edemas on the wall of the bladder. When hematuria appeared the affected pigs died (at the rate of 100 per cent) as a result of acute anemia. Prophylactic measures have been especially successful with the use of streptomycin to which the isolated coli strains proved sensitive.