Title
Alternative cost-effective media to facilitate MODS culture for diagnostics of tuberculosis
Date Issued
01 July 2022
Access level
open access
Resource Type
journal article
Author(s)
Rodriguez J.
Vargas J.
Grandjean L.
London School of Hygiene and Tropical Medicine
Johns Hopkins Bloomberg School of Public Health
Publisher(s)
Churchill Livingstone
Abstract
Most culture-based methods for tuberculosis diagnosis remain low-cost options for low- and mid-income countries. The MODS culture is a rapid and low-cost assay to diagnose tuberculosis and determine drug susceptibility. However, its implementation is limited due to the low accessibility to supplies required for the enriched medium. In this study, we evaluate two alternative culture media: A powder-based mixed (PM) and a lyophilized media (LM). Catalase, PANTA, and gamma irradiation were evaluated as additions to PM and LM. The culture performance of the alternative media was compared with the standard MODS medium (MM) using Mycobacterium tuberculosis isolates and positive acid-fast smear sputum samples. Overall, no significant difference was observed in the bacterial growth between PM and LM with MM. However, PANTA and gamma irradiation combined reduced bacterial growth significantly in all media variants. A median positivity day of 6 ± 5 days was observed for sputum samples, regardless of the culture medium. The preliminary results show that the two variants culture media have a similar performance to the standard MODS medium. The powder-based media with PANTA (PM_P) showed a time-to-positivity and sensitivity similar to the standard MODS medium. It is the simplest to prepare and does not require any sterilization process.
Volume
135
Language
English
OCDE Knowledge area
Enfermedades infecciosas
Sistema respiratorio
Subjects
Scopus EID
2-s2.0-85133246427
PubMed ID
Source
Tuberculosis
ISSN of the container
14729792
Sponsor(s)
This work was funded by the Consejo Nacional de Ciencia, Tecnología e Innovación Tecnológica of Peru ( CONCYTEC )-ProCiencia (Contract number 157-2018-FONDECYT-BM-IADT-AV ).
Sources of information:
Directorio de Producción Científica
Instituto Peruano de Energía Nuclear
Scopus