Evaluation of New Granada medium (modified) for the antenatal screening of group B streptococcus *

Author: Kelly V.   Garland Suzanne  

Publisher: Ashgate Publishing Ltd

ISSN: 0031-3025

Source: Pathology, Vol.26, Iss.4, 1994-10, pp. : 487-489

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

Previous Menu Next

Abstract

New Granada medium (NGM), modified by the substitution of trimethoprim for methotrexate, was compared to a selective Todd-Hewitt broth (NPC broth) and idrect plating onto Edwards medium for assessment of genital carriage of group B streptococcus in pregnant women. Whilst NGM was found to be less sensitive (85%) than NPC broth (95%) and more sensitive than Edwards medium (67%), its use reduced the direct laboratory cost of screening by approximately 41% and also improved the time to report a result by 24 hrs.