Contrasting occurrence of Chromobacterium violaceum in tropical drinking water springs of Uganda

Denis Byamukama*, Andreas H. Farnleitner, Frank Kansiime, Mohamad Manafi, Martina Burtscher, Robert L. Mach

*Corresponding author for this work

Research output: Journal article (peer-reviewed)Journal article

13 Citations (Scopus)


Occurrence of Chromobacterium violaceum in six protected drinking water springs in Uganda was investigated. C. violaceum showed a contrasting occurrence, which was independent of human impact as assessed by faecal pollution indicators. It was isolated from two springs (S1 and S2) that were located close to each other (3 km) but not in the rest. In S1 C. violaceum was continuously detected, in concentrations ranging from 6 to 270 cfu 100 ml -1, while in S2 it was detected on only one sampling occasion. C. violaceum was never detected in the investigated upper soil layers (down to 15 cm) in the immediate surroundings (50m radius) of the springs, despite continued isolation of faecal indicators. The results of the study indicate that C. violaceum may not be ubiquitous in spring water, but could occur in significant numbers in particular potable groundwaters as an autochthonous member.

Original languageEnglish
Pages (from-to)229-238
Number of pages10
JournalJournal of Water and Health
Issue number3
Publication statusPublished - Sept 2005
Externally publishedYes


  • Chromobacterium violaceum
  • Faecal indicators
  • Protected springs
  • Tropical waters
  • Water quality

ASJC Scopus subject areas

  • Water Science and Technology
  • Waste Management and Disposal
  • Public Health, Environmental and Occupational Health
  • Microbiology (medical)
  • Infectious Diseases


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