Publisher: Bachudo Science Co. Ltd

Studies On The Longitudinal Profile of The Bacteriological Quality of Aba River, Nigeria

Chidi F. Ezeama, Ferdinand Nwankpa
KEYWORDS: Longitudinal profile, Aba River, bacterial variation, bacteriological quality, pollution control strategy.


The longitudinal profile of the bacteriological quality of Aba River at six sampling stations (UP, UW, AB, CW, RL and DS) along the river course was studied. There was an upstream -downstream bacterial variations (P < 0,05) with UP showing initial lower counts (log10 3.08 cfu m1·1), while the maximum was observed at DS (log10 5.60 cfum). Three stations: UW, AB and DS showed increase in heterotrophic bacterial counts throughout the six months study period (Feb July). Stations CW and RL showed decrease in bacteria! counts after the third-month (April) of the investigation. Ten bacterial genera were isolated and the most prevalent in all the stations included Staphylococcus sp., Pseudomonas sp., Escherichia coli and Micrococcus sp. Klebsielfa sp., Streptococcus faecalis, Salmonella sp., Shigella sp., Bacillus sp. and Clostrfdium perfringens were not detected in UP station. Of all the sampling stations, AB and DS showed the greatest variation of isolates followed by CW and RL. Station AB showed the highest coliform counts { 1.26 x 103 MPN 100m) while the lowest was observed at UP (24 to 70 MPN 1 OOm 1'1). The high bacterial and or coliform counts obtained along the course of the river depicts the public health risk associated with the domestic use of the river water and the need to plan an adequate pollution control strategy for Aba River.

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