Enumeration of Cryptosporidium spp and Giardia spp (oo)cysts in a tropical eutrophic lake: The municipal lake of Yaounde
Journal Title: International Journal of Environmental Science and Technology - Year 2007, Vol 4, Issue 2
Abstract
The biodynamic of Cryptosporidium spp. oocysts and Giadia spp. cysts have been assessed in the municipal lake of Yaounde, which is an artificial eutrophic lake that has been constructed on the Mingoa stream of the Mfoundi River Basin of Cameroon. The oocysts were identified by the Ziehl-Neelsen method while the cysts were identified by the Lugol iodine coloration. The values obtained suggest an increase in (oo)cysts density from the surface to the bottom of the lentic ecosystem. The oocysts varied from 56 oocysts/L in the upper layer to 2640 oocysts/L of water in the lowest layer, while the cysts population dynamics ranged from 24 cysts/L at the surface layer of the lake to 1713 cysts/L at the lowest layers of the lake. There was a considerable reduction in the resistant forms of these emerging pathogenic protozoa between the surface water of the Mingoa stream entering the Lake and that coming out from the Lake. The highest value of Cyptosporidium oocysts determined at the entrance of the lake is 1480 oocysts/L while at the outlet the highest value of oocysts identified is 620 oocysts/L. The highest value of Giardia cysts determined at the entrance of the lake is 352 cysts/L while at the outlet the highest value recorded is 294 cysts/L.
Authors and Affiliations
G. Ajeagah, T. Njine, S. Foto, C. F. Bilong Bilong, P. Karanis
Keywords
Related Articles
- EP ID EP123689
- DOI -
- Views 97
- Downloads 0
Destroying hills in the northeastern part of Bangladesh:<br /> A qualitative assessment of extent of the problem and its probable impac
Indiscriminate cutting of hills in the Sylhet region has become a major environmental issue. The nature and life style of Sylhet intimately related with the hills are thus under the threat of a drastic imbalance in its e...
Renewable Energy In Iran: Challenges and Opportunities for Sustainable Development<br />
Around the globe, developing countries have reported different cases of successfully implemented Renewable Energy (RE) program supported by bilateral or multilateral funding. In developing countries subsidy has played a...
Influence of operating conditions on the removal of Cu, Zn, Cd and Pb ions from wastewater by adsorption
Nile Rose Plant was used to study adsorption of several cations (Cu2+, Zn2+, Cd2+ and Pb2+) from wastewater within various experimental conditions. The dried leaves of Nile Rose Plant were used at different adsorbent/met...
Environmental impact of an orchard winter wash and early season pesticide applications on both a beneficial and a pest mite species in Bramley apple orchards
Apple orchards often receive winter-washes to help aid invertebrate pest control. These can have detrimental environmental consequences. The application of winter-wash increased Aculus schlechtendali numbers while a decr...
Thermodynamic and environmental consideration of advanced gas turbine cycles with reheat and recuperator
The role of gas turbine power plants in electrical energy production has been considerably increased in the last two to three decades. Various methods have been proposed to improve the performance of gas turbine cycles....