Antonie van Leeuwenhoek

, Volume 88, Issue 1, pp 35–48

Inactivation of Escherichia coli and coliform bacteria in traditional brass and earthernware water storage vessels


DOI: 10.1007/s10482-004-7366-6

Cite this article as:
Tandon, P., Chhibber, S. & Reed, H.R. Antonie Van Leeuwenhoek (2005) 88: 35. doi:10.1007/s10482-004-7366-6


The detection and enumeration of indicator bacteria such as Escherichia coli is used to assess the extent of faecal contamination of drinking water. On the basis of this approach, the effectiveness of storing water contaminated with faecal indicator bacteria in brass or earthern vessels (mutkas) of the type used in rural India have been investigated. Suspensions of bacteria in sterile distilled water were maintained for up to 48 h in each vessel and enumerated by surface plate counts on nutrient agar (non-selective) and several selective coliform media at 37 °C either under standard aerobic conditions, or under conditions designed to neutralise reactive oxygen species (ROS), e.g. using an anaerobic cabinet to prepare plates of pre-reduced growth medium or by inclusion of sodium pyruvate in the growth medium, with incubation of aerobically-prepared plates in an anaerobic jar. The counts obtained for E. coli decreased on short-term storage in a brass mutka; counts for selective media were lower than for equivalent counts for non-selective medium, with ROS-neutralised conditions giving consistently higher counts than aerobic incubation. However, after 48 h, no bacteria were cultivable under any conditions. Similar results were obtained using water from environmental sources in the Panjab, and from rural households where brass and earthern mutkas are used for storage of drinking water, with enumeration on selective coliform media (presumptive total coliforms). In all cases results indicated that, while storage of water in a brass mutka can inactivate E. coli and coliforms over a 48 h period, standard aerobic plate counting using selective media may not be fully effective in enumerating sub-lethally damaged bacteria.


Heavy metalsReactive oxygen species (ROS)Selective mediaSub-lethal stress



membrane faecal coliform agar without rosolic acid


membrane lauryl sulphate agar


reactive oxygen species

Copyright information

© Springer 2005

Authors and Affiliations

  1. 1.Division of Biomedical SciencesNorthumbria UniversityNewcastle upon Tyne, Tyne and WearUK
  2. 2.Department of MicrobiologyPanjab UniversityChandigarhIndia