Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Monitoring the Bacteriological Quality of Manual Drilling Water in the Tandjilé Region in Chad

Version 1 : Received: 26 September 2020 / Approved: 27 September 2020 / Online: 27 September 2020 (07:53:08 CEST)

How to cite: Bantin, A.B.; Jun, X.; Wang, H. Monitoring the Bacteriological Quality of Manual Drilling Water in the Tandjilé Region in Chad. Preprints 2020, 2020090667 (doi: 10.20944/preprints202009.0667.v1). Bantin, A.B.; Jun, X.; Wang, H. Monitoring the Bacteriological Quality of Manual Drilling Water in the Tandjilé Region in Chad. Preprints 2020, 2020090667 (doi: 10.20944/preprints202009.0667.v1).

Abstract

The assessment of water quality consists of counting bacteria indicating fecal contamination or detecting the presence of pathogenic bacteria using standardized or validated methods of classical microbiology. Our present study aims to determine the bacteriological quality of drilling water in the Tandjilé region of Chad. Our method used was based on qualitative and quantitative research on suspected total coliforms, Echerichia Coli and fecal enterococci were analyzed according to the standard routine methods of the French Association for Normalization (AFNOR). Microbiological analysis shows the presence of indicators of fecal contamination such as total coliforms, Escherichia coli and fecal enterococci. The number of strains detected in 100 ml were E. coli (7 /29 samples), fecal Streptococcus (6 /29 samples) and total coliforms (29/29 samples), respectively from borehole water. The contamination rate of E. coli is 24.13%, total coliforms 100% and 20.68% of fecal enterococci in boreholes. The high number of these microorganisms is more than the values recommended by the WHO for the quality of drinking water. Corrective and urgent measures are needed to improve the quality of these water resources, rich in pathogens, which are health risks, and the causes of infectious diseases such as gastroenteritis, diarrhea, typhoid and skin diseases.

Subject Areas

monitoring; bacteriological quality; manual drilling water; Tandjilé region; Chad

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