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Levels of Faecal Indicator Bacteria and Biofilm-Producing Escherichia Coli in Vembanad Lake, Kerala, India

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Title Levels of Faecal Indicator Bacteria and Biofilm-Producing Escherichia Coli in Vembanad Lake, Kerala, India
Not Available
 
Creator Krishna Suresh
Visnuvinayagam, S.
Murugadas, V.
Radhakrishnan Nair, V.
Sivaraman, G. K.
Toms C. Joseph
 
Subject Biofilm
E. coli
Faecal Streptococci
Vembanad Lake
crystal violet method
 
Description Not Available
Most of earlier investigations on pollution monitoring
of bacteria have relied on the levels of E. coli in
the aquatic environment with limited investigation
on their biofilm producing ability. The capacity of
a bacteria to produce biofilm is closely related to its
pathogenicity. Vembanad Lake in Kerala is the
longest lake in India, with 1.6 million people living
on its shores and relying on it for their livelihood
either directly or indirectly. The study was conducted
to assess the level of biofilm-producing E.
coli in Vembanad Lake. A Niskin water sampler was
used to collect samples after mapping 34 locations
and were used as sampling points. These location
points covered the entire stretch of Vembanad Lake;
Ernakulam, Kottayam, and Alappuzha regions.
Faecal coliform (FC), E. coli and Faecal Streptococci
(FS) in the water samples were enumerated using
the 5-tube MPN method. The samples yielded 102
E. coli isolates, which were confirmed by polymerase
chain reaction. All the isolates were checked for
their biofilm formation ability. The study revealed
that the Ernakulam region had the highest number
of FC, FS and E. coli among the three regions.
Among the E. coli isolates, 68, 14, 12 and 3 were
weak, moderate, strong and very strong biofilm
producers, respectively. It can be inferred that high
prevalence of biofilm producing E. coli in Vembanad
Lake indicate a potential hazard. It is recommended
that the biofilm-forming capacity of E. coli be
assessed along with routine monitoring since this
ability of bacteria is associated with bacterial
survival and invasiveness.
Not Available
 
Date 2024-05-18T20:01:54Z
2024-05-18T20:01:54Z
2023-12
 
Type Research Paper
 
Identifier Krishna Suresh, Visnuvinayagam, S., Murugadas, V., Radhakrishnan Nair, V., Sivaraman, G. K. and Toms C. Joseph (2023) Levels of Faecal Indicator Bacteria and Biofilm-Producing Escherichia Coli in Vembanad Lake, Kerala, India. Fish. Techol. 60(4): 262-268.
0015-3001
http://krishi.icar.gov.in/jspui/handle/123456789/82838
 
Language English
 
Relation Not Available;
 
Publisher Society of Fisheries Technologists, India (SOFTI)