[Tenacity of bacteria in the airborne state. III. Model studies on the epidemiology of Pasteurella multocida influenced by a tropical climate].

The viability of airborne P. multocida in a static aerosol chamber was determined at temperatures of 21, 24, 28, 34, 40 and 42 degrees C and relative humidities of 44, 70 and 87%. The greatest viability with 35.49 min half-life time was at 24 degrees C and 70% relative humidity. There was no separate influence of one of the climatic components temperature and relative humidity to the airborne viability of the germs. The lowest resistance of P. multocida in the airborne state was as they were solitary germs, but as agglomerates (1.5-3.5 micron) they survived also worse environmental conditions.