Table 3.

Additional testing of 32 samples with astrovirus-nonconclusive ELISA readings

Result of:CommentNo. (%) of samples with indicated profilea
Direct RT-PCRCulture + ELISACulture + RT-PCRIndeterminateLow positive
Astrovirus negative13 (68)8 (62)
+++Confirmed astrovirus positive22
++Possible RT-PCR inhibitors in stools22
+Virus not viable?20
++Probable technical problem in culture RT-PCR01
  • a Samples with an optical density of 0.07 to 0.1 were considered indeterminate; samples with an optical density of 0.11 to 0.31 were considered low positive.