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. 2009 Jan 7;47(3):527–532. doi: 10.1128/JCM.01213-08

TABLE 2.

Comparison of reports of the accuracy of the Binax NOW RSV antigen immunoassay

Reference Yr % Sensitivity % Specificity Age when tested Total no. of tests No. antigen positive Specimen(s)a Reference test(s)
31 2004 87.0 94.0 6.9 mo 306 Not available NPA DFA
34 2004 89.0 100.0 6 days to adultb 118 31 NPA, NPW, N Culture
47 2004 94.6 88.5 <17.0 yrc 84 35 NPW Shell vial
2 2004 89.2 100.0 <18.0 yrd 310e 102 NPWf DFA, PCR, cultureg
22 2006 87.5 100.0 <5.0 yr 91 14 NPA DFA, culture
6 2006 73.0 100.0 <18.0 yr 130 33 NPAf DFA, shell vial
10 2007 81.0 93.0 Not availableh 14,756 794 NWi Culture
This study 2008 84.0 99.0 Median, 1.5 yrj 256 92 NPA, NPSj Culture, PCR
a

NPA is nasopharyngeal aspirate, NW is nasal wash, NPS is nasopharyngeal swab, N is nasal, and NPW is nasopharyngeal wash.

b

71% of the specimens were from persons <32 months old.

c

81% of the specimens were from persons <3 years old.

d

80% of the specimens were from persons <12 months old.

e

Specimens for antigen immunoassays were initially frozen.

f

Specimens were in 3 ml of viral transport medium.

g

Viral culture was performed after shipment to referral laboratory with average 36-h delay before setup.

h

6.5% of the specimens were from persons <1 month old.

i

96.2% of the specimens were nasal washes.

j

Data from this study (the median age of RSV-positive patients was 6.2 months) include the testing of 38 nasopharyngeal swab samples, of which 5 were RSV positive.