Comparison of sputum collection methods for tuberculosis diagnosis
19 Jun, 2017 | 13:01h | UTCInvited commentary: Remembering the basics: interventions to improve sputum collection for tuberculosis diagnosis (free)
Pooled sputum collection (sputum that was pooled from each spontaneous expectoration into the same sputum container over a period of several hours) increased the diagnostic performance of smear microscopy 1.6 times and the delivery of standardized instruction emphasizing the difference between sputum and saliva (verbally or visually) increased the odds of a positive microscopy result 1.4 times. “The effect of these simple, inexpensive strategies on diagnostic performance was similar to that of the relatively expensive GeneXpert MTB/RIF test, which, in the largest published studies, increased the odds of diagnosing tuberculosis by 1.3–1.5 times”