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Malaria is a protozoan disease caused in humans by the genusAll pesticides are toxic by nature and present risks of adverse effects that depend on toxicity of the chemical and the degree of exposure. While there is agreement that ITMNs can be effective in reducing malaria morbidity and mortality under field trials, a number of factors relating to their sustainability and contribution to health improvement in lessdeveloped countries have yet to be determined. In particular, the adverse effects associated with their long-term use and misuse has yet to be fully evaluated. Although this paper examines potential neurotoxic and neurobehavioral effects of long-term use of

Seasonal variation in bacterial heavy metals biosorption from soap and brewery industrial effluent samples from Eziama River in Abia State were analyzed for Pb, Hg, Fe, Zn, As, and Mn, using atomic absorption spectrophotometry. Bioaccumulation of the metals by bacteria showed the following trend > Fe >Zn >As > Pb > Mn (Rainy Season) and Zn > Fe > Mn > As > Hg > Pb (Dry season). Statistical analysis using of variance (ANOVA) showed significant differences in concentrations of Pb, Hg, Fe, Zn, As, and Mn level between the sampling zones at Eziama River. Seasonal changes in heavy metal concentrations, showed increases in Pb, Fe, and As from 1. Key words: Industrial effluent, water contamination, heavy metals, health effects INTRODUCTIONIndustrial effluent characteristics provide basic information about the integrity of the aquatic habitat within such rivers and streams into which they are discharged. Most of these effluents pose inestimable harm to which the microbial entity is the most adversely affected (Dallas, 2004;Barnes,). Most of the industrial effluents are shown to contain significant concentrations of inorganic chemicals which affect not only the normal pH values but also lead to the hardness of the water. These aquatic environments may put some components of the habitat on a disadvantaged position. Industrial effluents from soap manufacturing industries are known to contain complex chemicals most of which are very toxic and are capable of destroying the microbial habitats in a serious adverse way. For example, el-Gohary, et al., (1987) presented the wastewater management of an industrial complex, which produces different products, i.e. soap, perfume extract, macaroni, jam and juices. A continuous monitoring programme effluents and characterization of the composite wastewater from both soap and brewery manufacturing processes indicated that the waste was highly contaminated with organic compounds as indicated by COD and BOD values. Moreover, effluent from the soap manufacturing plant contains significant concentrations of oil and grease amounting to 563 mg l-1. Soap manufacturing effluent and the combined wastes discharged from the whole industrial complex were subjected to different treatment processes, namely dissolved air flotation, chemical coagulationsedimentation, and biological treatment via a completely mixed activated sludge process (Agedengbe, et al., 2003). The purpose of this present study is mainly to determine the seasonal variation in heavy metal biosorption by bacteria isolated from Eziama River near Soap and Brewery Industries in Aba, Abia State Nigeria and to discuss the overall environmental Health implications. Seasonal variation in bacterial heavy MATERIALS AND METHODS Sampling location and backgroundThe industrial effluent water samples for this analysis were obtained from selected representative areas of the Eziama River directly affected by the Soap and Brewery industries discharges. The sampling area within the Eziama River and the sampling point stretches from the Ok...