Phenotypic identification of soil bacterial and fungal communities inhabiting an archaeological monument at Augustine University, Ilara Epe, southwest Nigeria

Background: The Sungbo Eredo Monument is an ancient public work with a system of defensive walls and ditches located in Eredo Local Council Development Area of Epe, Lagos State, southwest Nigeria. A huge section of the monument cuts through the Augustine University campus, forming two-sided vertical walls with a deep ridge in-between. The objective of this investigative study is to determine the microbial profile of soil samples from the monument in the University campus. Methodology: Soil samples were collected from the topsoil at a depth of 7.5cm from four randomly selected points along the edge of the monument. The samples were transported to the microbiology laboratory of the Department of Biological Sciences of Augustine University for analysis. Samples were cultured on Nutrient agar (NA) and incubated aerobically for 24-48 hours for bacteria isolation and on Sabouraud’s Dextrose agar (SDA) for 72 hours for fungi isolation. Bacterial colonies on NA were preliminarily identified to genus level by Gram reaction and conventional biochemical test scheme for Gram-positive (catalase, coagulase, starch hydrolysis) and Gram-negative isolates (oxidase, urease test, indole, methyl red, Voges Proskauer and sugar fermentation tests). Fungi colonies on SDA were identified using conventional macroscopic and microscopic characteristics. Antibiotic susceptibility test of the bacterial isolates to selected antibiotics was done using the Kirby Bauer disc diffusion method. Results: A total of twenty-three bacterial isolates in four genera; Bacillus, Staphylococcus, Cellobiococcus and Micrococcus and nine fungal isolates in three genera; Saccharomyces, Aspergillus and Botrytis were identified from the cultures. The bacterial isolates were sensitive (>50% sensitivity) to only gentamicin and ofloxacin, with 65.2% and 78.3% sensitivity rates respectively, while they were largely resistant to all other antibiotics such as ceftriaxone, erythromycin, cefuroxime, cloxacillin, ceftazidime and augmentin, with resistance rates of 65.2%, 65.2%, 73.9%, 82.6%, 86.9%, 91.3% respectively. Conclusion: The results of this investigative study revealed the presence of antibiotic-resistant bacteria (mainly Gram-positive) and fungi on the archaeological monument of Augustine University, adding to the existing data on microbial spectrum of archaeological monuments that could be useful for unraveling human cultural habits and microbe-related human diseases. However, further studies on molecular identification of these microbial spectrum will be required to ascertain their genetic relatedness and ancestral phylogeny, which will be useful for archaeologists in their study of the Sungbo-Eredo ancestral monument.   French title: Identification phénotypique des communautés bactériennes et fongiques du sol habitant un monument archéologique à l'Université Augustine, Ilara Epe, sud-ouest du Nigeria Contexte: Le monument Sungbo Eredo est un ancien ouvrage public doté d'un système de murs défensifs et de fossés situé dans la zone de développement du conseil local d'Eredo à Epe, dans l'État de Lagos, au sud-ouest du Nigéria. Une énorme section du monument traverse le campus de l'Université Augustine, formant des murs verticaux à deux côtés avec une crête profonde entre les deux. L'objectif de cette étude d'investigation est de déterminer le profil microbien d'échantillons de sol provenant du monument du campus universitaire. Méthodologie: Des échantillons de sol ont été prélevés dans la couche arable à une profondeur de 7,5 cm à partir de quatre points choisis au hasard le long du bord du monument. Les échantillons ont été transportés au laboratoire de microbiologie du Département des sciences biologiques de l'Université Augustine pour analyse. Les échantillons ont été cultivés sur gélose nutritive (NA) et incubés en aérobie pendant 24 à 48 heures pour l'isolement des bactéries et sur gélose au dextrose de Sabouraud's(SDA) pendant 72 heures pour l'isolement des champignons. Les colonies bactériennes sur NA ont été préalablement identifiées au niveau du genre par réaction de Gram et schéma de test biochimique conventionnel pour les isolats Gram-positif (catalase, coagulase, hydrolyse de l'amidon) et Gram-négatif (oxydase, test à l'uréase, indole, rouge de méthyle, Voges Proskauer et sucre essais de fermentation). Les colonies de champignons sur SDA ont été identifiées en utilisant des caractéristiques macroscopiques et microscopiques conventionnelles. Le test de sensibilité aux antibiotiques des isolats bactériens à des antibiotiques sélectionnés a été effectué en utilisant la méthode de diffusion sur disque de Kirby Bauer. Résultats: Un total de vingt-trois isolats bactériens dans quatre genres; Bacillus, Staphylococcus, Cellobiococcus et Micrococcus et neuf isolats fongiques de trois genres; Saccharomyces, Aspergillus et Botrytis ont été identifiés à partir des cultures. Les isolats bactériens étaient sensibles (sensibilité >50%) uniquement à la gentamicine et à l'ofloxacine, avec des taux de sensibilité de 65,2 % et 78,3 % respectivement, alors qu'ils étaient largement résistants à tous les autres antibiotiques comme la ceftriaxone, l'érythromycine, la céfuroxime, la cloxacilline, la ceftazidime et l'augmentine avec des taux de résistance de 65,2%, 65,2%, 73,9%, 82,6%, 86,9%, 91,3% respectivement. Conclusion: Les résultats de cette étude d'investigation ont révélé la présence de bactéries résistantes aux antibiotiques (principalement à Gram positif) et de champignons sur le monument archéologique de l'Université Augustine, ajoutant aux données existantes sur le spectre microbien des monuments archéologiques qui pourraient être utiles pour démêler l'homme. les habitudes culturelles et les maladies humaines liées aux microbes. Cependant, d'autres études sur l'identification moléculaire de ces spectres microbiens seront nécessaires pour déterminer leur parenté génétique et leur phylogénie ancestrale, ce qui sera utile aux archéologues dans leur étude du monument ancestral Sungbo-Eredo

Community-Acquired acute kidney injury in critically Ill children as seen in the emergency unit of a tertiary hospital in Enugu, Southeast Nigeria

Background: Acute kidney injury (AKI) has been shown to be common in critically ill patients with associated very poor outcome. There is paucity of data regarding its epidemiology, particularly in developing countries. This study aims to assess the presence of AKI among critically ill children to determine its prevalence, outcome, and outcome determinants in children suffering from AKI.Patients and Methods: This is a cross-sectional observational study of critically ill children admitted to the children emergency unit of University of Nigeria Teaching Hospital, Ituku Ozalla, Enugu. Critically ill children suffering from AKI were identified and classified using the pediatric RIFLE criteria.Result: A total of 300 children were studied. One hundred and eighty (60%) were males. The prevalence of AKI in the study population was 56%. Factors associated with AKI included age <5 years (OR = 3.618; 95% CI = 2.100–6.235; P < 0.001), inability to drink (OR = 2.866; 95% CI = 1.723-4.766; P < 0.001), tachycardia (OR = 2.111; 95% CI = 1.071-4.163; P = 0.031), unconsciousness (OR = 3.128, 95% CI = 1.303-7.511; P = 0.011), and hypotension (OR = 2.619; 95% CI = 1.008–6.804; P = 0.048). The odds of death increased with increasing severity of AKI among those who had pRIFLE-F, who were 24 times more likely to die than those with no AKI (OR = 24.38; 95% CI = 5.702-104.194; P = 0.001).Conclusion: The prevalence of AKI in the study population was unacceptably high. The risk factors to its occurrence can be determined from epidemiologic and clinical data, and therefore, clinicians attending to critically ill patients should identify those with AKI for early intervention to reduce the expected poor outcomes associated with its occurrence.Keywords: Acute kidney injury, critically ill children, Nigeri

Prevalence and reasons for missed opportunities for vaccination in a Nigerian hospital

Background: Missed Opportunity for Vaccination (MOV) is a significant cause of low immunisation coverage and resurgence of vaccine preventable diseases. Hence, identifying the causes of MOV in our health facilities and eliminating them will help improve immunisation coverage in the area. Objectives: To determine the prevalence and reasons for MOV in children aged 0 to 23 months at the Federal Medical Centre, (FMC) Umuahia, Abia State. Methods: Exit interviews were conducted for 300 mother/child pairs of children aged 0 to 23 months consecutively as they visited the preventive and the curative sections of FMC Umuahia. Results: Of the 300 children recruited, 158 (52.7%) were males and 142 (47.3%) were females with a M:F ratio of 1.1:1.Thirty six (12%) of all the children had missed opportunities for vaccination. MOV rate was significantly higher among the in-patients (p= 0.02). The reasons for MOV noted were; presentation of the children on the ‘wrong’ immunisation days (72.2%), false contraindications to vaccination by the health workers (13.9%), unavailability of vaccines (8.3%) and refusal to open a new vial by the health workers (5.6%). The commonest remote reason why the children who presented on the ‘wrong’ immunisation days missed their previous immunisation appointments was because of non-availability of the mothers due to illness, parent’s travel and farm work. Conclusion: The prevalence of MOV at FMC Umuahia is 12% and the commonest reason was that the children presented on the ‘wrong’ immunisation days. Hence, all the vaccines should be made available to every eligible child on any day of the week in order to effectively eliminate MOV

Antibacterial, anti-inflammatory and peroxidasemediated cyclooxygenase-1 inhibitory properties of Fusarium solani extract

Context: Nigerian soil fungi population is unexplored. It is hypothesized that they harbour new bioactive chemicals. This hypothesis is based on the large percentage of currently approved medicines that originated from soil-inhabiting micro-organisms Objectives: To investigate the antimicrobial and anti-inflammatory properties of Fusarium solani ethyl acetate (EtOAc) extract selected based on its broad spectrum of antimicrobial potential in an overlay experiment with seven other soil fungi strains. Materials and methods: Fungus number 6 (F6), identified by molecular characterization as Fusarium solani (Mart.) Sacc (Nectriaceae) was selected for studies from eight purified soil fungi due to its superior broad-spectrum antibiotics producing potential following agar overlay experiment. F6 was fermented for 21 d and the minimum inhibitory concentration (MIC) of its EtOAc fermentation extract (dose range: 12.5–100 µg/mL) was determined using agar dilution method for Staphylococcus aureus, Bacillus subtilis, Pseudomonas aeruginosa, Escherichia coli, Salmonella typhi and anti-inflammatory properties determined using rat-paw (250–500 mg/kg) and xylene induced oedema (250–500 µg/kg) (in Swiss albino rats and mice) models, respectively. The ability of the extract to inhibit cyclooxygenase (COX) enzyme was also determined in vitro using Cayman test kit-760111. Result: The MIC of the EtOAc extract was <12.5 µg/mL for S. aureus, P. aeruginosa and Escherichia coli. It inhibited xylene induced oedema by 65% compared with 61% observed for diclofenac and was significantly (p < 0.05) better than diclofenac in rat-paw-oedema model within the first phase of inflammation. The extract inhibited COX-1 peroxidase-mediated activities with an IC50 below 5 µg/mL. Conclusions: The extract exhibited strong antibacterial and anti-inflammatory properties, warranting further investigations into therapeutic potential of this fungus. This study design can be adapted in soil fungi metabolomic investigations. We report for the first time the potent anti-inflammatory property of the ethyl acetate extract of soil strain of F. solani with a possible mechanism of action that involves the inhibition of COX enzyme