Related Experiment Video
Updated: Jul 19, 2026

Micro-Colony Forming Unit Assay for Efficacy Evaluation of Vaccines Against Tuberculosis
Published on: July 28, 2023
Radiology quality assurance in a developing country setting: the 11-valent pneumococcal conjugate vaccine trial,
Jose D Arcay1, Arnaldo F Ocampo, Roger K Solis
1Bohol Regional Hospital, Tagbilaran City, Bohol, Philippines. ritmari@smartwifi.com.ph
Abstract:
The endpoint used for a phase 3 pneumococcal conjugate vaccine (PCV) trial in Bohol, Philippines was radiographic consolidation. Only one (Bohol Regional Hospital, BRH) of the four surveillance hospitals had a quality control/quality assurance program (QC/QA) prior to the trial. QC/QA was initiated in the three private hospitals. Radiologists from BRH evaluated radiographs from all hospitals based on recommended standards. Four thousand nine hundred and eighty nine films were analyzed. In 2000, the proportion of good quality films was 65% and 29% in BRH and private hospitals, respectively. By 2004, these increased to 92% and 79%, respectively. Poor film quality was commonly due to absence of collimation and poor contrast. The regular QC/QA implementation was necessary to improve film quality and was particularly important in our PCV trial that used X-ray proven consolidation as an endpoint.
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