RUPTURE OF BACTERIA BY EXPLOSIVE DECOMPRESSION

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Abstract
Foster, JohnW. (University of Georgia, Athens),Robert M. Cowan, and Ted A. Maag. Rupture of bacteria by explosive decompression. J. Bacteriol.83:330–334. 1962.—A device is described for instantaneously rupturing bacteria and other cells in a closed system under controlled conditions by explosive decompression. With this device, 31 to 59% ofSerratia marcescens, ranging up to 20 mg (dry wt) of cells per ml, were ruptured after nitrogen saturation at 1740 psi. Under similar conditions, 10 to 25% ofBrucella abortusandStaphylococcus aureuswere ruptured. Rupture of these organisms produced readily separable cell walls. Centrifugation in linear glycerol gradients was applied to further separate cell walls from debris.Mycoplasma gallinarum, Leptospira pomona, andEimeria tenella(avian coccidia) oöcysts were also broken up by the decompression chamber. Pressure and duration of saturation of cells with gas affected rupture efficiency. Within the limits of this study, concentration of organisms and volume of suspensions did not have a definite effect.