Summary.
The suitability of the Coulter electronic particle counter for counting chains of cells of Streptococcus faecalis was investigated. Growth curves produced from electronic counts had similar characteristics to curves produced from nephelometer readings, viable pour plate counts and total counts performed with a Thoma counting chamber. The validity of comparing counts obtained using different counting parameters is discussed.
An automatic inoculation device which seeds a medium with a small inoculum of cells is described. It allows a culture to reach a particular stage of development at a predetermined time.
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