Abstract
The number of bacteria on the surfaces of intertidal sand grains has been estimated by shaking sand with sea-water, de-ionized water and 0.1 % teepol. Total counts, viable counts, and optical densities of the resultant washings were measured. 0.1 % teepol caused the largest number of bacteria to detach from sand grains, followed by de-ionized water, and lastly by sea-water. Total counts and optical densities were strongly correlated. There was little relation between viable counts and optical densities.
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