[Devitalization of Bordetella bronchiseptica in vitro using vapors of Persterile and triethyl glycol]

Using the method of bacterial carriers, the devitalizing effect was studied of Persteril and triethylene glycol vapours, acting in vitro, on a 24-hour culture of a mixture of 39 strains of Bordetella bronchiseptica, isolated from the nasal cavity of pigs which came from five stocks suffering from the clinical form atrophic rhinitis. After exposure of the carriers of Bordetella bronchiseptica to the action of spontaneously developing vapours o the mentioned chemicals, the devitalizing effect was determined by bacteriological examination. The vapours of the water solution of Persteril, containing 0.1% of peracetic acid, showed a 90.91 to 93.83% devitalizing effect after 48-hour exposure at room temperature. When the vapours of warmed concentrated triethylene glycol were used, a 98.57 to 100% devitalizingeff ect was obtained after a 72-hour exposure under the same temperature conditions. In experiements performed at a temperature of 37 degrees C, a 24-hour exposure sufficed for obtaining 91.67 to 100% devitalizing effectiveness. There is a discussion concerning the importance of the obtained results and the need for testing them experimentally by a methodically simple and cheap continual disinfection of the air and stable surfaces in premises for pig stocks affected by atrophic rhinitis.