There were no significant differences in growth rate associated with habitat of origin (Origin effect, Table 2B ), and although there was a marginally significant Origin ∗ Media effect ( Table 2B ), contrasts within this effect detected no habitat of origin-specific differences in responses to the same media.
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Generalized Growth of Estuarine, Household and Clinical Isolates of <i>Pseudomonas aeruginosa</i>.
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The sentences
This absence of mean differences and differences in variability among habitats of origin does not reflect low overall variation in growth rate; in fact, there were highly significant differences among isolates within habitats of origin in their overall and media-specific growth (Isolate(Origin) [mean] and Isolate ∗ Media(Origin) [mean] effects, Table 2A ).