That dog is remarkably fierce.
Another possible mechanism to explain the 'healthy carrier' state would be through a transient decrease in amebic virulence, and this possibility is suggested by the common observation of loss of virulence in prolonged axenic cultures of pathogenic strains of E. histolytica, which is reversible by different means (eg. xenization of the cultures, treatment with cholesterol, or with serum complement, and passage through liver).
A 30-year-old woman, with no heart disease, was referred to our center with a history of rare episodes of sustained tachycardia and frequent feeling of extrasystoles.
The CUBE and ROLLUP modifiers to the GROUP BY clause allow you to create aggregations of aggregates, or superaggregates. These superaggregates or summary rows are included with the result set in a way similar to using the COMPUTE statement on control breaks in SQL*Plus; […]
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