G. Briggs Phillips, Grover C. Broadwater, Morton Reitman, Robert L. Alg
||The Journal of Infectious Diseases, 1956, Vol.99 (1), pp.56-59
Significant cross infection occurred when normal guinea pigs were placed as controls in ventilated cages with guinea pigs exposed bodily to aerosol of Brucella suis. Cross infection was demonstrated when the control animals were housed with aerosol-exposed animals (1) continuously for 28 days, (2) for the first day after exposure only and (3) for the 7th day only. When guinea pigs were exposed to large numbers of aerosolized Bacillus subtilis spores and held in ventilated cages, spores were detected in the air of the cages for as long as 18 days.