Evaluation of the physicochemical properties and bacterial loads of selected rivers in Ondo State, Nigeria.

IF 1.3 Q4 MICROBIOLOGY

Iranian Journal of Microbiology Pub Date : 2023-12-01 DOI:10.18502/ijm.v15i6.14159

Olorunjuwon O Bello, Bridget O Akinpeloye, Temitope K Bello, Yinka D Oluwafemi, Bamikole W Osungbemiro

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引用次数: 0

Abstract

Background and objectives: Water is crucial to human existence but may be contaminated with microorganisms, thus making it unfit for consumption. This study aimed to evaluate the physicochemical properties and bacterial loads of selected river waters in Ondo State, Nigeria.

Materials and methods: Ten major rivers were sampled between April and August, 2021. The pH, temperature, total alkalinity, colour, turbidity, electrical conductivity, dissolved oxygen, ammonium, aluminium, organic matters, nitrate levels including the microbial loads were determined according to standard procedures. Confirmation of identified isolates was achieved by API 20E and API 20NE.

Results: The turbidity, colour, conductivity, ammonium, and aluminium ranged from 4.3 to 15.2 NTU, 4 to 20 NTU, 123.5 to 580.2 mgL^-1, 0 to 3.5 mgL^-1, and 0.05 to 1.7, respectively. Most physicochemical parameters showed no significant differences from the WHO permissible limits for drinking water (p > 0.05). The total viable bacterial count in the rivers ranged from 1.5 × 10⁵ to 6.3 × 10⁵ CFUmL^-1, while the total coliform count ranged from 1.3 × 10³ to 4.8 × 10³ CFUmL^-1. The predominant bacteria were Escherichia coli and Pseudomonas aeruginosa.

Conclusion: This study revealed that the physiochemical properties of the waters were majorly within the WHO permissible standards but with significantly higher bacterial loads.

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评估尼日利亚翁多州部分河流的理化特性和细菌负荷。

背景和目标：水对人类的生存至关重要，但也可能受到微生物的污染，因此不适合饮用。本研究旨在评估尼日利亚翁多州部分河水的理化性质和细菌负荷：2021 年 4 月至 8 月期间，对 10 条主要河流进行了采样。按照标准程序测定了 pH 值、温度、总碱度、颜色、浊度、电导率、溶解氧、铵、铝、有机物、硝酸盐水平，包括微生物负荷。通过 API 20E 和 API 20NE 对已鉴定的分离物进行确认：浊度、颜色、电导率、铵和铝的范围分别为 4.3 至 15.2 NTU、4 至 20 NTU、123.5 至 580.2 mgL-1、0 至 3.5 mgL-1 和 0.05 至 1.7。大多数理化参数与世界卫生组织饮用水允许限值无明显差异（P > 0.05）。河流中的总存活细菌数在 1.5 × 105 至 6.3 × 105 CFUmL-1 之间，总大肠菌群数在 1.3 × 103 至 4.8 × 103 CFUmL-1 之间。主要细菌为大肠杆菌和铜绿假单胞菌：这项研究表明，水体的理化特性主要在世界卫生组织允许的标准范围内，但细菌量明显较高。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Iranian Journal of Microbiology MICROBIOLOGY-

CiteScore

2.40

自引率

7.10%

发文量

审稿时长

12 weeks

期刊介绍： The Iranian Journal of Microbiology (IJM) is an international, multi-disciplinary, peer-reviewed journal that provides rapid publication of the most advanced scientific research in the areas of basic and applied research on bacteria and other micro-organisms, including bacteria, viruses, yeasts, fungi, microalgae, and protozoa concerning the development of tools for diagnosis and disease control, epidemiology, antimicrobial agents, clinical microbiology, immunology, Genetics, Genomics and Molecular Biology. Contributions may be in the form of original research papers, review articles, short communications, case reports, technical reports, and letters to the Editor. Research findings must be novel and the original data must be available for review by the Editors, if necessary. Studies that are preliminary, of weak originality or merely descriptive as well as negative results are not appropriate for the journal. Papers considered for publication must be unpublished work (except in an abstract form) that is not under consideration for publication anywhere else, and all co-authors should have agreed to the submission. Manuscripts should be written in English.