Contamination of Sachet Water in Nigeria: Assessment and Health Impact

Adequate supply of fresh and clean drinking water is a basic need for all human beings. Water consumers are frequently unaware of the potential health risks associated with exposure to water borne contaminants which have often led to diseases like diarrhoea, cholera, dysentery, typhoid fever, legionnaire’s disease and parasitic diseases. The inadequacy of pipe borne water-supply in Nigeria is a growing problem; as a result people resort to buying water from vendors, and sachet or bottled water became a major source of drinking water. Although, portable and affordable, the problems of its purity and other health concerns have begun to manifest. Sachet water have been reported to contain bacteria such as Bacillus sp., Pseudomonas sp., Klebsiella sp., Streptococcus sp., and oocysts of Cryptosporidia sp. Apart from environmental contaminants, improper storage and handling by vendors also poses a serious threat to the health of the ignorant consumers. This paper tends to review the quality of these ‘pure water’; its physical examination, microbial assessments, its impacts on health, and the various strategies adopted by the concerned authorities to regulate this thriving industry

Caesarean section in second stage of labour: a commentary on principles and techniques

Caesarean section done at full cervical dilatation (second stage of labour) has been on the rise globally and comes with its own unique challenges and complications. This commentary highlights the peculiar challenges associated with caesarean section in second stage of labour and gives an overview on various principles to be followed and techniques to employ to reduce fetal and maternal morbidity

Role of Information and Communication Technologies (ICTs) in Enhancing Food Utilization among Smallholder Farmers’ Households in Northern Nigeria

Information and Communication Technologies (ICTs) are attracting global attention because of their unprecedented potential to bring about astounding improvement. The numerous advantages presented by ICTs can be employed towards the enhancement of rural households’ capabilities in attaining sufficient, safe and nutritious food.  This paper seeks to establish the potency of ICTs in enhancing the food utilization among smallholder households in Northern Nigeria.  Data were collected through a structured questionnaire administered to 120 smallholders.  The results show that smallholders consider that food utilization was inadequate (80.9%); however, they acknowledged that ICTs could play a significant role in enhancing food utilization.  The findings further reveal that the following were ranked first to fifth by household heads: disseminating appropriate information about food crops (98.6%), improving purchasing power and market price (94.1%), enhancing decision-making regarding food (89.5%), improving food distribution practices (81.1%) and improving cultural and individual food choice (77.6). Keywords: ICTs, Food utilization, Smallholder farmer households, Nigeria DOI: 10.7176/IKM/10-1-05 Publication date: January 31st 202

Effect of Smallholders Socio-Economic Characteristics on Farming Households’ Food Security in Northern Nigeria

Food security is indispensable prerequisite for the continued existence of mankind and his economic activities including adequate food production.  The study examined the effect of smallholder socio-economic characteristics on farming households’ food security in Northern Nigeria. Data for this study were obtained from 120 randomly selected farming households, using a structured questionnaire. The results revealed that 81.7% of the households considered themselves food insecure.  Furthermore, the majority of households have low incomes and low educational attainment which usually affects food security. There was also a significant negative association between food security and education as well as government policies. The analysis shows that low levels of education and government policies affected rural households. The paper therefore recommended that government and other development agencies should enhance food security among smallholders’ farmers and rural communities through farmer education, promoting labour-saving technologies and facilitating access to market information.  In the same vein, the paper infers that Nigeria needs to come up with results oriented food policy which for now it lacks.  The public policy makers must as a matter of urgency see food as an essential component of welfares and as such develop sufficient political will to achieve food increase in food production and eventually attain food security for all. Keywords: household food security; household food insecure; smallholder farmers; Nigeria DOI: 10.7176/JESD/11-4-16 Publication date: February 29th 202

Filter-wrapper combination and embedded feature selection for gene expression data

Biomedical and bioinformatics datasets are generally large in terms of their number of features - and include redundant and irrelevant features, which affect the effectiveness and efficiency of classification of these datasets. Several different features selection methods have been utilised in various fields, including bioinformatics, to reduce the number of features. This study utilised Filter-Wrapper combination and embedded (LASSO) feature selection methods on both high and low dimensional datasets before classification was performed. The results illustrate that the combination of filter and wrapper feature selection to create a hybrid form of feature selection provides better performance than using filter only. In addition, LASSO performed better on high dimensional data

Evaluation of Escherichia coli as indicator of point-of-use chlorination efficiency of drinking water

In this study, the relevance of the presence of Escherichia coli in drinking water as an indicator of point-of-use chlorination efficiency is examined. The survival of clinical isolates of human enteric pathogenic bacteria (Klebsiella pneumoniae, Pseudomonas aeruginosa, Salmonella typhi, Shigella dysenteriae, Staphylococcus aureus, Streptococcus faecalis and Vibrio cholerae) as well as E. coli was monitored as a function of effective germicidal concentration and contact time. The  inactivation kinetics indicated that the minimum effective dose for three-log units (99.9%) inactivation of E. coli (C·T99.9% = 10 mgl-1-min) can sufficiently  eliminate the other pathogens (C·T99.9% ranged from 5.6–10.5 mgl-1-min); the exception being K. pneumoniae, which required more than 1.4-times higher dose. In general, the results implied that the branded hypochlorite solution should effectively inactivate almost all vegetative  bacteria in household drinking water at the manufacturer’s recommended dosage of 0.5 mgl-1 after at least 30 minutes contact time. The application of point-of-use chemical disinfectants to drinking water in households will significantly reduce the incidence of water-borne infections  particularly in rural communities where central treatment of water is mostly unavailable.Keywords: Effective dose; Point-of-use disinfectants; Indicator bacteria; Pathogen; Escherichia coli; Chlorinatio

Knowledge of malaria amongst caregivers of young children in rural and urban communities in Southwest Nigeria

Purpose: To compare the awareness and treatment knowledge of malaria amongst caregivers of young children in urban and rural areas of Ado-Odo/Ota Local Government Area in Ogun State. Method: Structured questionnaires were administered to caregivers of children under the age of five years in 1472 households using a multistage random sampling technique. Results: Many respondents (65%) attributed the cause of malaria to mosquito bite. The knowledge of malaria treatment (particularly the knowledge of pediatric doses) was generally poor. Caregivers in urban areas had better understanding of the dosage regimen for both adult and pediatric doses (

Biopolymer-mediated Green Synthesis of Noble Metal Nanostructures

Polymer-coated noble metal nanoparticles are currently of particular interest to investigators in the fields of nanobiomedicine and fundamental biomaterials. These materials not only exhibit imaging properties in response to stimuli but also efficiently deliver various drugs and therapeutic genes. Even though a large number of polymer-coated noble metal nanoparticles have been fabricated over the past decade, most of these materials still present some challenges emanating from their synthesis. The metal nanoparticles when encapsulated in a polymer and taken up by human cells might show a lower degree of toxicity; however, the degree of toxicity for some of the starting materials and precursors has raised serious concerns. Hence, there is a need to implement the principle of green chemistry in the synthesis of nanomaterials. The use of environmentally benign materials for the synthesis of metal nanoparticles provides numerous benefits ranging from biocompatibility, availability, cost-effectiveness, amenable scale-up to eco-friendliness. The biopolymer-based nanovehicles have been found to be more suitable in the field of nanotechnology owing to their high reproducibility, ease of manufacture, functional modification and safety (they are not carcinogenic). Unlike synthetic polymers where the raw material can be derived from petrochemicals or chemical industrial processes, biopolymers are produced from renewable resources such as plant and/or living organism. They are degradable by natural processes down to elemental entities that can be resorbed in the environment. Furthermore, they can also be modified to serve a particular purpose which explains the myriad of their potential applications. The macromolecular chain of these biopolymers possesses a large number of hydroxyl groups which can easily complex with metal ions. Additionally, these biopolymers also contain supramolecular structures that can lead to new functionalities of their composites with metal and semiconductor nanoparticles. In this chapter, a comprehensive discussion on different biopolymers, green synthesis of noble metal nanostructures, mechanisms, characterization and application in various fields is presented

Development of effective drying technology for quality enhancement of whitings fish (Merlangius merlangius)

A cost effective, affordable and environmental friendly solar tent dryer was developed for production of stockfish from Whitings fish (Merlangius merlangius) that is stable and free of contamination from air borne dust and insects. The dryer was constructed of locally available materials; basically steel and polythene. It was able to record an average differential temperature of 12 oC when compared with the ambient condition. The tent dried fresh samples of Whitings of 25 kg with average moisture content of 80.10% (wet basis) to a final weight of 5.42 kg with average moisture content of 10.13% (wet basis) in four days. Over 75 % overall acceptance was recorded when the stockfish was subjected to sensory analysis. The drying technology reduced the bacterial and fungal count of the fish sample used from initial value of 6.8 CFU/g x 102 and 3.6 CFU/g x 105 to 3.9 CFU/g x 102 and 2.7 CFU/g x 105 respectively. This is below the acceptable safe limit and what is obtainable in stockfish sold in the market. The output could be a good alternative to the imported stockfish in terms of food safety and sensory quality. Most importantly, it would reduce the huge amount of money being spent on importation of stockfish, and more job and wealth will be created for the teeming populace while the lovers of stockfish now have access to freshly processed products that would not endanger their life.Keywords : Stockfish, dryer, sensory, solar, qualit