Geophagia: Benefits and potential toxicity to human-A review.

Geophagy is the habit of consuming clay soil such as chalk or kaolin. Though it is globally practiced, the safety of those involved is yet to be fully established. It is thought to be highly prevalent in pregnant women because of its antinausea or therapeutic effects. This practice is also thought to be provoked by some nutritional needs, but in modern society its etiology is obscure. The mineralogical and chemical compositions of clay may vary from one region to another and even in all form of rocks clay constitutes. Published articles in geophagy indicate lack of adequate investigations into the toxicity of geophagy, though it is globally practiced and more prevalent in Africa (as a continent) or in Africans migrants. Some studies have helped to identify some minerals that are toxic to human if ingested. In most cases, the potential toxicity emphasized by these studies is based on the detection of the presence of these nuisance elements in the geophagic materials. Scientifically, a lot has been done in the light of detection of toxic matter, but more investigations on metabolic studies are still necessary. The variability of clay content with respect to source motivated this review on geophagy and its potential toxicity to human. This review is aimed at bringing out findings that would enable a better understanding of the toxicity potential of geophagy across context and taxa.

Detection of Antimicrobial Resistance, Pathogenicity, and Virulence Potentials of Non-Typhoidal Salmonella Isolates at the Yaounde Abattoir Using Whole-Genome Sequencing Technique.

One of the crucial public health problems today is the emerging and re-emerging of multidrug-resistant (MDR) bacteria coupled with a decline in the development of new antimicrobials. Non-typhoidal Salmonella (NTS) is classified among the MDR pathogens of international concern. To predict their MDR potentials, 23 assembled genomes of NTS from live cattle (n = 1), beef carcass (n = 19), butchers' hands (n = 1) and beef processing environments (n = 2) isolated from 830 wet swabs at the Yaounde abattoir between December 2014 and November 2015 were explored using whole-genome sequencing. Phenotypically, while 22% (n = 5) of Salmonella isolates were streptomycin-resistant, 13% (n = 3) were MDR. Genotypically, all the Salmonella isolates possessed high MDR potentials against several classes of antibiotics including critically important drugs (carbapenems, third-generation cephalosporin and fluoroquinolone). Moreover, >31% of NTS exhibited resistance potentials to polymyxin, considered as the last resort drug. Additionally, ≤80% of isolates harbored "silent resistant genes" as a potential reservoir of drug resistance. Our isolates showed a high degree of pathogenicity and possessed key virulence factors to establish infection even in humans. Whole-genome sequencing unveiled both broader antimicrobial resistance (AMR) profiles and inference of pathogen characteristics. This study calls for the prudent use of antibiotics and constant monitoring of AMR of NTS.

Development of a Duplex TaqMan Real-Time Polymerase Chain Reaction for Accurate Identification and Quantification of Salmonella Enteritidis from Laboratory Samples and Contaminated Chicken Eggs.

Salmonella enteritidis is a major causative agent of foodborne illnesses worldwide. As the traditional serotyping and quantification methods are labor-intensive, time-consuming, and expensive, faster and more convenient molecular diagnostic methods are needed. In this study, we developed and validated a rapid duplex TaqMan real-time polymerase chain reaction (PCR) for the accurate identification and quantification of S. enteritidis. The primers and TaqMan probes were designed based on the S. enteritidis-specific gene lygD and the Salmonella genus-specific gene invA. The melt curve and gel electrophoresis analysis showed that the designed primers had potent specificity for the amplification of lygD and invA. The duplex real-time PCR specifically identified S. enteritidis from a panel of 40 Salmonella strains that represented 29 serovars and 12 non-Salmonella organisms. The duplex real-time PCR assay detected four copies of S. enteritidis DNA per reaction. The intra- and inter- assays indicated a high degree of reproducibility. The real-time PCR could accurately detect and quantify S. enteritidis in chicken organs after Salmonella infection. Furthermore, the assay identified 100% of the S. enteritidis and Salmonella genus isolates from chicken egg samples with superior sensitivity after 6 h of pre-enrichment compared to the traditional culture method. Additionally, the most-probable-number (MPN) combined with qPCR and a shortened incubation time (MPN-qPCR-SIT) method was developed for the population determination of S. enteritidis and compared with various enumeration methods. Thus, we have established and validated a new duplex real-time PCR assay and MPN-qPCR-SIT method for the accurate detection and quantification of S. enteritidis, which could contribute to meeting the need for fast detection and identification in prevention and control measures for food safety.

Perceptions and practices of community members relating to trachoma in Africa: a qualitative systematic review protocol.

OBJECTIVE: The objective of this systematic review is to synthesize and present the best available evidence on community perceptions and practices relating to trachoma in Africa. INTRODUCTION: Globally, trachoma is the leading cause of blindness and is responsible for about 1.4% of all cases of blindness. The African continent is the worst affected, with about 1.9 million cases of trichiasis (61%). While interventions are currently being implemented to combat the disease in Africa, very little is known by decision makers about community perceptions and practices relating to trachoma, which may hinder successful implementation. INCLUSION CRITERIA: Studies with participants, regardless of their health status, gender, religion and ethnicity, aged 14 and over conducted in any African country, will be considered. Studies on Africans, conducted out of the continent and those involving healthcare professionals, will not be included in this review. METHODS: Qualitative studies, published in English from 1996 onwards. will be considered. Databases to be searched will include, but not be limited to: PubMed, CINAHL, Embase and PsycINFO. Study selection, critical appraisal and data extraction will be conducted by two independent reviewers, using the appropriate JBI methodology and any disagreement will be resolved by discussion or with a third reviewer. Qualitative findings will be synthesized using the appropriate JBI methodology, following the meta-aggregation approach. Where textual pooling is not possible, the findings will be presented in narrative form. The ConQual approach will be used to grade synthesized findings, and these will be presented in a Summary of Findings.

Experiences of women living with infertility in Africa: a qualitative systematic review protocol.

REVIEW QUESTION: What are the experiences of women living with infertility in Africa?

Perceptions of blood donation among people in Africa: a qualitative systematic review protocol.

REVIEW QUESTION/OBJECTIVE: The aim of this review is to synthesize the best available evidence on the perceptions of blood donation among people living in Africa.

The experiences of people living with epilepsy in developing countries: a systematic review of qualitative evidence.

BACKGROUND: Epilepsy is a global public health problem affecting people of all ages, sex, races, nations and social class. The majority of the 50 million people with epilepsy live in developing countries, with a prevalence rate of five to 10 people per 1000. The disease poses an enormous psychological, social and economic burden on patients. An estimated 90% of people with epilepsy in developing countries do not receive treatment due to sociocultural, economic and political factors. Current treatment interventions are limited to the clinical management of the disease and are largely driven by the healthcare provider's perspective, ignoring the experiences of people living with epilepsy (PLWE). OBJECTIVE: The aim of this review was to identify, critically appraise, extract, synthesize and present the best and most current available evidence on the experiences of PLWE in developing countries. REVIEW QUESTIONS: • What are the experiences of PLWE regarding the causes of their condition?• What are the experiences of PLWE regarding treatment of epilepsy?• How has epilepsy shaped the social relationships of the affected persons? INCLUSION CRITERIA: People living with epilepsy in developing countries (Africa, Asia, Eastern Europe and Latin America).The experiences of PLWE in developing countries with particular attention on the causes, treatment and its impact on their social relationships.Primary research studies with a qualitative design not limited to phenomenology, ethnography, grounded theory, ethnomethodology, phenomenography, critical theory, interpretative or feminist analysis, case study, narrative studies and action research. CONTEXT: Qualitative studies conducted in hospitals and community settings in developing countries. SEARCH STRATEGY: A three-step search strategy was used to identify published and unpublished studies in the English language from the 1990s to the present. METHODOLOGICAL QUALITY: Identified studies that met the inclusion criteria were retrieved and critically appraised by two independent reviewers prior to their inclusion using the Joanna Briggs Institute Qualitative Assessment and Review Instrument (JBI-QARI). DATA EXTRACTION: Data were extracted from included papers using the recommended data extraction form embedded in the JBI-QARI. DATA SYNTHESIS: Findings, where possible, were pooled using the JBI-QARI. It involved the meta-aggregation of findings to generate a set of statements that represented that aggregation, through assembling the findings rated according to their quality, and categorizing these findings on the basis of similarity in meaning. RESULTS: From the 13 studies included in the review, 113 findings were extracted to create categories. Eight categories were created from which three synthesized findings were produced. The synthesized findings were: SYNTHESIZED FINDING 1: People living with epilepsy believed that the disease was caused by factors such as fever, demonic power, beatings, witchcraft, curses and God. Patients also had differing views as to whether the disease was contagious or hereditary. They indicated that the disease manifested as seizures, triggered by fever, stress, depression and anger. SYNTHESIZED FINDING 2: People living with epilepsy used biomedical and traditional methods to treat epilepsy and also developed strategies for coping with the disease beyond seeking treatment. SYNTHESIZED FINDING 3: People living with epilepsy had negative and positive experiences in their social relationships. The negative experiences were linked to the social, psychological and economic burden of the disease on patients, whereas the social support they got from friends, peers, family and community members were the positive aspects. CONCLUSION: People living with epilepsy attribute the cause of the disease to agents like fever, demonic power and witchcraft. Patients use biomedical and traditional methods to treat the disease and have also developed various coping strategies (like prayers and concealment) alongside treatment. Epilepsy has negative effects on the social relationships of patients and is a social, psychological and economic burden for patients. However, there are some positive effects like the social support they receive from family members, friends and the community.

Body composition of Cameroonian lactating women determined by anthropometry, bioelectrical impedance, and deuterium dilution.

OBJECTIVE: This study compared body composition estimates using deuterium dilution, multiple-frequency bioelectrical impedance analysis (BIA), and skinfold thickness techniques in a group of Cameroonian lactating women. METHODS: Body fat, fat-free mass, and total body water in 44 Cameroonian lactating women (2.63 ± 1.31 mo postpartum) were assessed by deuterium dilution, the Siri or black-specific derived Durnin-Womerley equation, and 12 BIA-prediction equations developed in samples of subjects of white, black, black-and-white, or unspecified racial background, respectively. RESULTS: Compared with deuterium dilution, anthropometry and BIA-based predictive equations overestimated body fat by 2.7 to 11.7 kg; thus, fat-free mass and total body water were underestimated. In all cases, the significant biases resulted in large 95% limits of agreement, yielding unacceptable potential bias at the level of the individual. However, the exclusion of suprailiac skinfold in the calculation, yielding to non-significant (P < 0.05) bias, improved the prediction of body composition in Cameroonian lactating women using the Durnin-Womersley and Siri equations. CONCLUSION: It is essential to adjust the Durnin-Womersley equation before using it in the Siri equation for the prediction of body composition in lactating women. Further development and cross-validation of prediction equations from BIA specific to lactating women is needed.