الفهرس 
Microorganisms and pollutionOnly 14 pages are availabe for public view
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Abstract
Microbial and chemical pollution of lakes have dangerous impacts
on the ecosystem as whole. To human, microbial pollution leads to the
spread of many diseases such as cholera, typhoid and severe diarrhea and
hepatitis. The chemical pollution may lead to serious health effects such as
birth defects, development disorders, respiratory problems, cancer and in
some cases can lead to death. So, the attention must be paid to monitoring
them carefully in all Egyptian lakes, especially Lake Qarun, since it is
considered the key to development in the province of Fayoum, to a source
of fisheries and salts. It also has great historical and tourist importance.
Therefore, the present study was suggested for the assessment of
anthropogenic impact on the lake by studying the seasonal changes at the
chemical and physical properties of water and sediments. As well as,
bacteriological analyses of water and sediments were investigated.
However, the results are summarized in the following points.
Several bacterial groups were detected, in both water and sediment
samples of Lake Qarun, to judge the hygienic water quality of the
bacteriological picture. They were briefly as follows:
1. The lowest total viable count of heterotrophic bacteria in subsurface
water was detected in station VIII in winter, while the highest count
was determined in station I in summer. The relative high values were
observed in spring in station I and in the station I in autumn.
2. The lowest total viable count of Staphylococcus sp. in subsurface
water was recorded in station V in winter and the highest count was
detected in station I in summer. The relative high values were
observed also in spring season in station I and in the station I in
autumn.