scholarly journals Bacteriological quality of potable water sources supplying Morogoro municipality and its outskirts: a case study in Tanzania.

1991 ◽  
Vol 107 (3) ◽  
pp. 479-484 ◽  
Author(s):  
S. F. H. Jiwa ◽  
J. K. Mugula ◽  
M. J. Msangi
Keyword(s):  
River Water ◽  
Potable Water ◽  
Most Probable Number ◽  
Faecal Coliforms ◽  
Potential Health ◽  
Probable Number ◽  
Bacteriological Quality

Bacteriological quality of potable water supplying Morogoro municipality and its outskirts (population 135000 people) was assessed by the determination of the most probable number (MPN) of faecal coliforms, Escherichia coli, faecal streptococci andClostridium perfringensfor a period of 6 months. River water and chlorinated pipeborne water were found contaminated with microorganisms in the order of 3·8 x 101to 4·95 x 103; 3·2 x 101to 4·5 x 103; 101to 6·4 x 101and 1·2 x 101to 2·5 x 102/100 ml of water respectively. Injured coliforms in treated water averaged 87 %. Pollution of river water by organic matter was much above acceptable standard. These findings indicate that there is a need for further treatment of water before consumption in order to avoid potential health hazards.

scholarly journals Environmental impact on the bacteriological quality of domestic water supplies in Lagos, Nigeria

2002 ◽  
Vol 36 (4) ◽  
pp. 513-520 ◽  
Author(s):  
L Egwari ◽  
O O Aboaba
Keyword(s):  
Town Planning ◽  
Enteric Pathogens ◽  
Most Probable Number ◽  
Domestic Water ◽  
Water Supplies ◽  
Probable Number ◽  
Bacteriological Quality ◽  
Shallow Wells ◽  
The Impact

OBJECTIVE: To assess the impact of town planning, infrastructure, sanitation and rainfall on the bacteriological quality of domestic water supplies. METHODS: Water samples obtained from deep and shallow wells, boreholes and public taps were cultured to determine the most probable number of Escherichia coli and total coliform using the multiple tube technique. Presence of enteric pathogens was detected using selective and differential media. Samples were collected during both periods of heavy and low rainfall and from municipalities that are unique with respect to infrastructure planning, town planning and sanitation. RESULTS: Contamination of treated and pipe distributed water was related with distance of the collection point from a utility station. Faults in pipelines increased the rate of contamination (p<0.5) and this occurred mostly in densely populated areas with dilapidated infrastructure. Wastewater from drains was the main source of contamination of pipe-borne water. Shallow wells were more contaminated than deep wells and boreholes and contamination was higher during period of heavy rainfall (p<0.05). E. coli and enteric pathogens were isolated from contaminated supplies. CONCLUSIONS: Poor town planning, dilapidated infrastructure and indiscriminate siting of wells and boreholes contributed to the low bacteriological quality of domestic water supplies. Rainfall accentuated the impact.

Bacteriological Quality of Aquacultured Freshwater Fish Portions in Prepackaged Trays Stored at 3°C

2001 ◽  
Vol 64 (9) ◽  
pp. 1399-1404 ◽  
Author(s):  
MARÍA-NIEVES GONZÁLEZ-RODRÍGUEZ ◽  
JOSÉ JAVIER SANZ ◽  
JESÚS A. SANTOS ◽  
ANDRÉS OTERO ◽  
MARÍA-LUISA GARCÍA-LÓPEZ
Keyword(s):  
Shelf Life ◽  
Sensory Quality ◽  
Fecal Coliforms ◽  
Most Probable Number ◽  
Probable Number ◽  
Bacteriological Quality ◽  
Chemical Index ◽  
Antimicrobial Residues ◽  
Minimal Data

Fresh trout fillets and salmon slices packed in trays were obtained from two multinational chain supermarkets and evaluated for freshness and bacteriological quality immediately after packaging and during storage at 3°C. Initial aerobic counts at 30 and 25°C were significantly (P &lt; 0.05) lower in trout fillets (5.27 ± 0.57 and 4.87 ± 0.80 log CFU/g, respectively) than in salmon slices, where levels in excess of 6 log CFU/g were found. In both products, initial Enterobacteriaceae counts were slightly higher than 3 log CFU/g and increased significantly during shelf life by approximately 3 log CFU/g. Most of the enterobacteria were identified as Citrobacter freundii, Hafnia alvei, and Enterobacter cloacae. On day 0, most probable number (MPN) counts of total and fecal coliforms were not significantly different, numbers of the latter group being approximately 4 MPN/g. Escherichia coli was only detected when fish was spoiled. Although initial presumptive Staphylococcus aureus counts were approximately 3 log CFU/g, only 4 of 84 selected colonies belonged to this species. Neither Salmonella nor antimicrobial residues were detected in any sample. Ethanol content in salmon slices did not significantly (P &gt; 0.05) increase until they became inedible. Significant correlation (r = +0.72, P &lt; 0.05) was observed between this chemical index and viable counts at 30°C only when salmon slices were inedible. Trout fillets were acceptable for 7 days, and salmon slices showed signs of spoilage after 4 days. Although public health concerns associated with packed trout and salmon appear to be minimal, data on sensory quality, shelf life, and total viable and Enterobacteriaceae counts strongly suggest the need to improve the quality control systems used by European multinational retailers, especially for imported salmon.

scholarly journals MICROBIOLOGICAL QUALITY OF GOAT MILK PRODUCED ON ALAGOAS STATE, BRAZIL

2019 ◽  
Vol 11 (2) ◽  
pp. 47-56
Author(s):  
Erica Guedes Celestino ◽  
Micheline Thaís Santos ◽  
Sybelle Georgia Silva ◽  
Tania Marta Carvalho dos Santos ◽  
Elizabeth Simões do Amaral Alves ◽  
...  
Keyword(s):  
Microbiological Quality ◽  
Goat Milk ◽  
Raw Milk ◽  
Most Probable Number ◽  
Probable Number ◽  
Pasteurized Milk ◽  
Total Coliforms ◽  
Specific Medium

The objective of this study was to verify the microbiological quality of raw and pasteurized goat milk and produced in Alagoas state, Brazil. Was carried out three interval collect of pasteurized and raw milk and the samples taken to the laboratory. All samples were subjected to aerobic mesophilic microorganisms counting, psychrotrophic microorganisms, determination of the most probable number (MPN) of total coliforms and thermotolerant microorganisms. For analysis, samples were plated on specific medium (Baird-Parker Agar Base himedia M043) and incubated at 37 °C for 24h. To Salmonella sp. detection was used plating the medium Salmonella Shigella agar. The presence of coliforms at 35 °C was detected in all samples as well as 45 °C except to first sample. To the pasteurized milk was found to coliforms at 35 °C and 45 °C in the second and third samples. Only in the second test was checked the presence of mesofilic bacteria. We have not found samples contaminated with microorganisms psychrotrophic, Salmonella sp. and Staphylococcus sp. According to the obtained results the quality of collected milk has unacceptable conditions of consumption compared to coliform counts, according to the parameters established by law.

scholarly journals Physicochemical and bacteriological quality of sachet water used by Ghanaian university students: implications for public health

2019 ◽  
Vol 9 (1) ◽  
pp. 56-63
Author(s):  
Bismark Elorm Addo ◽  
Godfred Amankwaa ◽  
Razak M. Gyasi
Keyword(s):  
University Students ◽  
Water Samples ◽  
Faecal Coliform ◽  
Total Alkalinity ◽  
Most Probable Number ◽  
Probable Number ◽  
Bacteriological Quality ◽  
The Mean ◽  
Sachet Water

Abstract This study analyses the quality of sachet water consumed by university students in Metropolitan Kumasi, Ghana. Thirty sachet water samples from ten different brands were tested for their physical and bacteriological quality using meters and titrimetric method and most probable number method, respectively. Overall, one half of the sachet water samples were highly contaminated with total and faecal coliform. While the mean total coliform/100 mL concentration of ANG, NOV, IM, PD and DKN were 9.15 × 105, 2.35 × 106, 9.15 × 105, 4.15 × 105 and 9.15 × 105 respectively, we recorded faecal coliform counts of 2.3 × 105, 4.15 × 105, 2.3 × 105, 2.3 × 105 and 2.3 × 105, respectively for ANG, NOV, IM, PD and DKN. Moreover, samples from DKN brand showed Escherichia coli count of 4.0 × 104. The conductivity ranged from 2.24 μS/cm to 43.60 μS/cm while the mean total alkalinity of all samples ranged from 33.33 mg/L to 120 mg/L. The coliform contamination levels of the water samples violated the guidelines and standards of WHO for drinking water quality. Ghanaian regulatory agencies should intensify the monitoring and surveillance activities to ensure compliance with strict hygienic measures by sachet water producers.

scholarly journals Determination of thermotolerant coliforms present in coconut water produced and bottled in the Northeast of Brazil

2017 ◽  
Vol 21 (0) ◽  
Author(s):  
Vandbergue Santos Pereira ◽  
Johnatan Wellisson da Silva Mendes ◽  
Lorena Alves Oliveira ◽  
Carlos Eberton Alves Mangueira ◽  
Edlânia Moraes Rodrigues ◽  
...  
Keyword(s):  
Microbiological Quality ◽  
Coconut Water ◽  
Automated System ◽  
Most Probable Number ◽  
Probable Number ◽  
Providencia Alcalifaciens ◽  
Thermotolerant Coliforms ◽  
Preventive Methods

Abstract Coconut water is considered to be a natural isotonic drink and its marketing is gradually increasing. The objective of the present study was to evaluate the microbiological quality of the coconut water produced and bottled in the Northeast of Brazil. Products form ten industries from different states in the Northeast of Brazil were analyzed. The most probable number (MPN) method was used to quantify the coliforms. Samples showing positive for coliforms were seeded on ChromAgar Orient plates and the bacteria identified from isolated colonies using the automated system Vitek 2 (BioMérieux), according to the manufacturer's instructions for the preparation of the inoculum, incubation, reading and interpretation. The samples showed thermotolerant coliform counts between 6.0×102 and 2.6×104 MPN/100 mL. The presence of Klebsiella pneumoniae, Morganella morganii and Providencia alcalifaciens was observed. The implementation of preventive methods and monitoring of the water quality by the industries is required.

scholarly journals Assessment of the Deterioration in Physiochemical and Microbiological Quality of Shivnath River Water in Durg District, India

2010 ◽  
Vol 7 (3) ◽  
pp. 733-738
Author(s):  
Seema A. Belorkar
Keyword(s):  
River Water ◽  
Microbiological Quality ◽  
Chemical Properties ◽  
Color Temperature ◽  
Plate Count ◽  
Most Probable Number ◽  
Total Hardness ◽  
Probable Number ◽  
Tolerant Strain

The water samples collected from Shivnath river in Durg Dist., India, were analyzed for physical properties like color, temperature, turbidity and odor, chemical properties like pH, alkalinity, total hardness, calcium hardness, magnesium hardness, total solids {Total dissolved solids (TDS) and total suspended solids (TSS)}, sulphates, nitrates were analyzed. Microbiological characteristics like detection of coliforms, quantitative analysis and most probable number (MPN) of coliforms was also performed. Incidences ofEscherichia coli0157 (Thermo tolerant strain) andSalmonellaspecies were analyzed. All stated properties were analyzed for both upstream and downstream sampling points to determine the effect of residential and industrial discharges on the quality of river water. The addition of discharges has shown many fold increase in all the analyzed physiochemical parameters. The MPN/100 mL for upstream sample was 900 and down stream sample showed rises up to 1600. The heterotrophic plate count (HPC) also increased from 1.30×104/100 mL to 1.53×104/100 mL. Incidences ofE.coli0157 (Thermo tolerant strain) andSalmonellaspecies were both found even before the addition of discharges.

scholarly journals The bacteriological quality of drinking water in Haldwani Block of Nainital District, Uttarakhand, India

2012 ◽  
Vol 10 (3) ◽  
pp. 465-470 ◽  
Author(s):  
Vinita Rawat ◽  
Sanjay Kumar Jha ◽  
Arundhati Bag ◽  
Monil Singhai ◽  
Chandra Mohan Singh Rawat
Keyword(s):  
Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Most Probable Number ◽  
Cross Sectional ◽  
Probable Number ◽  
Bacteriological Quality ◽  
Water Treatment Plants ◽  
Tube Wells

A cross-sectional study was conducted to assess the bacteriological quality of water in Haldwani block, Nainital District, India. Stratified random sampling was used to categorize water sources and consumer points. In total, 108 samples were collected: 15 from the Gola river, 51 from water taps, 24 from water treatment plants and 18 from tube wells. Samples were tested for coliforms by the most probable number technique. Identification of species was done by standard procedures. Of 108 water samples, 58.8% were found to be polluted. All samples of water (n = 15) from different sites of the Gola river were found to be highly contaminated. Out of 24 water treatment plant samples, four samples were found unsatisfactory, while more than half (51.6%) of its supplies to water taps were polluted. From tube wells and their water taps, 88.8 and 60% samples were found safe for drinking respectively. Bacterial contamination of water treatment plants and their supplies indicates significant disparities in the efficiency of water treatment processes. Contamination of water taps of tube wells suggests leakage of pipes. There is an urgent need to improve these services to ensure the supply of safe water for consumers.

scholarly journals Impact on Human Health Due to Ghaggar Water Pollution

2020 ◽  
pp. 211-217
Author(s):  
Ravi Kant Pareek ◽  
Prateek Srivastava ◽  
Ambrina S Khan
Keyword(s):  
River Water ◽  
Oxygen Demand ◽  
Polluted Water ◽  
Most Probable Number ◽  
Waterborne Diseases ◽  
Aquatic Life ◽  
Number Count ◽  
Probable Number ◽  
Quality Of Water

The people living in Ghaggar river basin are facing various waterborne diseases due to polluted water of Ghaggar River. The quality of Ghaggar river water was tested and analysed during this study. A health survey was also conducted to strengthen the work. The results undoubtedly verify that the quality of Ghaggar river water is not suitable to withstand the aquatic life and not fit for domestic uses. The low dissolved oxygen level and other checked parameters are clearly indicating it. The observed maximum values of biochemical oxygen demand (BOD5), color, pH, total dissolved solids (TDS), chloride (Cl-),turbidity and chemical oxygen demand (COD) were 36 mg/l, 500 ptcu, 8.6, 1321 mg/l, 161 mg/l, 301 NTU and 265 mg/l respectively. Most probable number count of river was also carried out and it shows very high number and clearly indicating that the river has bad quality of water. To understand the possible relationship between the quality of river water and water-borne diseases amongst the locals, a questionnaire survey was also carried out. The waterborne diseases observed in the study area were Jaundice, Diarrhea, Typhoid, Hepatitis, Malaria etc.

Sign in / Sign up

Export Citation Format

Share Document