Editor,—The possible link between rotavirus and the postenteritis syndrome was highlighted in the recent editorial1 about Richardson et al’s paper concerning the finding of prolonged rotavirus excretion in the stool using reverse transcription–polymerase chain reaction.2 We feel it is important to be circumspect about this link as the evidence to date is circumstantial.

The symptom duration in Richardson et al’s study ranged up to, but not beyond, 14 days. …