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Relation between Aeromonas and faecal coliforms in fresh waters
R M Araujo1, R M Arribas, F Lucena
1Departamento de Microbiologia, Facultad de Biologia, Universidad de Barcelona, Spain.
The Journal of Applied Bacteriology
|August 1, 1989
Summary
A study found that higher levels of Aeromonas bacteria correlate with increased fecal coliforms in polluted freshwater. This relationship was not observed in unpolluted waters, highlighting the impact of organic matter on bacterial presence.
Area of Science:
- Environmental Microbiology
- Water Quality Assessment
Background:
- Mesophilic aeromonads and fecal coliforms are indicators of water contamination.
- Freshwater habitats are susceptible to varying degrees of fecal pollution.
Purpose of the Study:
- To investigate the correlation between Aeromonas spp. and fecal coliforms in freshwater.
- To determine if fecal pollution levels influence this relationship.
Main Methods:
- Sampling of three freshwater habitats with different fecal pollution levels.
- Quantification of Aeromonas spp. and fecal coliforms (cfu/100 ml).
- Measurement of organic matter using biological oxygen demand (BOD).
Main Results:
- Aeromonas spp. concentrations ranged from 10(2)-10(9) cfu/100 ml.
- Fecal coliform counts varied between 9-10(7) cfu/100 ml.
- A significant positive correlation was found between Aeromonas, fecal coliforms, and BOD in polluted waters, but not in unpolluted waters.
Conclusions:
- Mesophilic aeromonads and fecal coliforms show a significant correlation in polluted freshwater environments.
- Organic matter concentration, indicated by BOD, is a key factor in this relationship.
- Water quality monitoring should consider both bacterial indicators in relation to pollution sources.
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