J E Malligo

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A single-stage impactor device, capable of fractionating a bacterial aerosol into its component mass size classes while preserving the viability of sensitive vegetative cells against the deleterious effects of desiccation and impaction, is described. Among the valuable features of the impactor are its negligible wall loss, ease of fabrication and use, and(More)
MALLIGO, JOHN E. (Fort Detrick, Frederick, Md.). Evaluation of an automatic electronic device for counting bacterial colonies. Appl. Microbiol. 13:931-934. 1965.-An automatic colony counter was tested extensively with colonies of two bacterial species, Serratia marcescens and Bacillus subtilis var. niger, grown on agar media. A stable relationship was(More)
An automatic colony counter was tested extensively with colonies of two bacterial species, Serratia marcescens and Bacillus subtilis var. niger, grown on agar media. A stable relationship was established between machine counts and counts done visually by technicians. The calibration curve and estimates of the efficiency of the machine are presented and(More)
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