scholarly journals Seroprevalence and Risk Factors of Crimean-Congo Hemorrhagic Fever in Cattle of Smallholder Farmers in Central Malawi

Pathogens ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 1613
Author(s):  
Marvin Collen Phonera ◽  
Martin Chitolongo Simuunza ◽  
Henson Kainga ◽  
Joseph Ndebe ◽  
Mwelwa Chembensofu ◽  
...  

Crimean-Congo hemorrhagic fever virus (CCHFV) is endemic in Africa, Asia, and Eastern Europe where it circulates among animals and ticks causing sporadic outbreaks in humans. Although CCHF is endemic in sub-Saharan Africa, epidemiological information is lacking in many countries, including Malawi. To assess the risk of CCHF in Malawi, we conducted an epidemiological study in cattle reared by smallholder livestock farmers in central Malawi. A cross-sectional study was conducted in April 2020 involving seven districts, four from Kasungu and three from Lilongwe Agriculture Development Divisions. A structured questionnaire was administered to farmers to obtain demographic, animal management, and ecological risk factors data. Sera were collected from randomly selected cattle and screened for CCHF virus (CCHFV) specific antibodies using a commercial ELISA kit. Ticks were collected from cattle and classified morphologically to species level. An overall CCHFV seropositivity rate of 46.9% (n = 416; 95% CI: 42.0–51.8%) was observed. The seropositivity was significantly associated with the age of cattle (p < 0.001), sex (p < 0.001), presence of ticks in herds (p = 0.01), district (p = 0.025), and type of grazing lands (p = 0.013). Five species of ticks were identified, including Hyalomma truncatum, a known vector of CCHFV. Ticks of the species Hyalomma truncatum were not detected in two districts with the highest seroprevalence for CCHF and vector competency must be further explored in the study area. To our knowledge, this is the first report of serologic evidence of the presence of CCHV among smallholder cattle in central Malawi. This study emphasizes the need for continued monitoring of CCHFV infection among livestock, ticks, and humans for the development of data-based risk mitigation strategies.

2012 ◽  
Vol 15 (01) ◽  
pp. 1250009 ◽  
Author(s):  
Monica Broniecki ◽  
Adrian Esterman ◽  
Hugh Grantham

Relatively little has been published on the range of risk factors contributing to musculoskeletal injuries in ambulance officers. This study aims to identify perceived risk factors for back, neck and shoulder musculoskeletal injuries and claims in relation to working conditions, and the physical and psychological demands of the job. This was a cross-sectional study using an internet-based survey in an Australian ambulance service. The survey included demographic questions and questions on psychosocial factors related to the job and the way in which work is organized, musculoskeletal injuries sustained and claims submitted in the previous 12 months; and two open ended questions on perceived risk factors for injury and injury risk mitigation strategies. Ambulance officers who felt they were able to take sufficient breaks were less likely to sustain a back, neck or shoulder musculoskeletal injury, and those who perceived their work required high levels of physical effort were more likely to submit a claim for these injuries. Two important perceived causal factors contributing to musculoskeletal injuries were the uncontrolled environment and non-adherence to manual handling techniques. However, suggested risk mitigation strategies of improving fitness and manual handling training, were not supported by the quantitative analysis.


BMJ Open ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. e042750
Author(s):  
Charles Okeahalam ◽  
Victor Williams ◽  
Kennedy Otwombe

IntroductionThe current COVID-19 pandemic is a global threat. This elicits questions on the level of preparedness and capacity of health systems to respond to emergencies relative to other parts of the world.MethodsThis cross-sectional study uses publicly available core health data for 53 African countries to determine risk factors for cumulative COVID-19 deaths and cases per million in all countries in the continent. Descriptive statistics were determined for the indicators, and a negative binomial regression was used for modelling the risk factors.ResultsIn sub-Saharan Africa, an increase in the number of nursing and midwifery personnel decreased the risk of COVID-19 deaths (p=0.0178), while a unit increase in universal healthcare (UHC) index of service coverage and prevalence of insufficient physical activity among adults increased the risk of COVID-19 deaths (p=0.0432 and p=0.0127). An increase in the proportion of infants initiating breast feeding reduced the number of cases per million (p<0.0001), while an increase in higher healthy life expectancy at birth increased the number of cases per million (p=0.0340).ConclusionDespite its limited resources, Africa’s preparedness and response to the COVID-19 pandemic can be improved by identifying and addressing specific gaps in the funding of health services delivery. These gaps impact negatively on service delivery in Africa, which requires more nursing personnel and increased UHC coverage to mitigate the effects of COVID-19.


1970 ◽  
Vol 42 (3) ◽  
pp. 199-203
Author(s):  
ND Uleanya ◽  
EO Obidike

Background: Hepatitis B Virus (HBV) infection has reached pandemic proportions all over the world with areas of highest prevalence being the sub- Saharan Africa and Southeast Asia. Most deaths related to HBV are due to complications from chronic infection. Acquisition of infection at a younger age is the most important predictor of chronicity. Eradication of HBV is an important but difficult tasks facing public health. HB immunization is the single most important factor in hepatitis B control and was commenced in 2004 in Nigeria.Objectives: To determine the prevalence of Hepatitis B surface antigen (HBsAg) among children in the era of HB immunization, the risk factors of transmission and knowledge of mothers about their HB status.Methods: A cross sectional study carried out on one hundred and forty children aged 18 months to 15 years at the children outpatient clinic (CHOP) of the University of Nigeria Teaching Hospital, Ituku. Hepatitis B surface antigen (HBsAg) was determined using Determine Test Kits and a structured interviewer administered questionnaire administered.Results: Six were positive for HBsAg, giving a prevalence rate of 4.3%. HBsAg was least prevalent among children 1-5 years (2%). None of the children ≤ 5 years who received HB vaccination was positive for HBsAg though one child > 5 years who received the vaccine was positive. Sharing of toothbrushes among siblings was found to be a significantly associated risk factor. Only 6.4% of mothers knew their hepatitis B status.Conclusion: There is a gradual fall in the prevalence of HBsAg in our environment due to HB immunization. Sharing of toothbrushes may be a potent means of transmission of HBV infection.Keywords: HBV, Prevalence, Children, Transmission, HB immunization


Author(s):  
Stephen Onyango Arwa ◽  
Dominic Mogere ◽  
David Musoke

Background: Soil transmitted helminthiasis, classified as neglected tropical diseases are among the most common infections worldwide with greatest numbers occurring in Sub-Saharan Africa, Americas, China and East Asia. Globally, over two billion people are infected with school-age children bearing the greatest burdens. Transmission is through eggs present in human faeces. They are infections of public health importance as they cause among others, nutritional impairment, diarrhoea and intestinal obstruction. Prevention involves deworming, health education and sanitation.Methods: The study was carried out in Rarieda, Kenya in 2018. Study participants were primary school children of ages seven to fifteen. Cross sectional study design was used and the data was analyzed using Statistical Package for Social Sciences. All the ethical issues were adhered to as per the International standards.Results: The study established that prevalence of soil transmitted helminthiasis was high in areas where the risk factors associated with the infections were high. Pupils who were more knowledgeable on soil transmitted helminthiases were less infected. Younger pupils were more infected than older pupils. Lastly, the prevalence of these infections varied with gender of the pupils, and geographical location from where the pupils came from.Conclusions: Correlation between prevalence of soil transmitted helminthiases and risk factors, and between presence of toilets and level of hygiene practice were positive, r=0.90 and 0.93 respectively; while correlation between prevalence of soil transmitted helminthiases and knowledge was negative, r=-0.75. Values of the correlations were of statistical significance at p<0.05.


2019 ◽  
Vol 9 (4) ◽  
pp. 370-375
Author(s):  
Anthonia A. Ikpeme*,Nchiewe E. Ani, Edoise M. Isiwele, Andrew E. Ekpenyong,Emmanuel E. Ekanem

Introduction: Over 80% of cardiovascular deaths take place in low and middle incomecountries. These cardiovascular deaths are caused by modifiable risk factors. Evidenceis emerging that some of these factors maybe even more prevalent in rural areas whichare generally underserved.Aim: The aim of this study was to record risk factors for cardiovascular disease inrural communities in south southern Nigeria and review some related literature.Methods: A cross sectional study during clinical outreach activities that took placein 2016 to 2018 in several rural and few urban communities in Cross River State,Nigeria. Participating individuals gave full consent and ethical clearance obtained.Socio-demographic data, Anthropometric data and Blood sugar measurements wereobtained. Data extracted was transferred into EXCEL thereafter analysis was doneusing SPSS version 21. p values less than 0.05 were deemed statistically significant.Tests of significance included Anova, chi square and student t- tests.Results: Total population investigated over the 3 year period was 504. (2016-33.1%),(2017 -37.9%), (2018 – 28%) with a Female: Male distribution of 1:1.Most participants tended to be overweight across the years 59.7%, 59.1%, 73.7%,2016, 2017, and 2018 respectively. The prevalence of Hypertension was 10.71%. Nosignificant gender difference in the prevalence of Hypertension (6.94% males to 3.77%females, p=0.097). The prevalence of Diabetes Mellitus was 10.67%. There was nosignificant gender prevalence (6.67% males to 4.00% females, p =0.431)Conclusion: Cardiovascular disease remains relatively uncommon in Sub-SaharanAfrica, despite an increasing prevalence of risk factors, but it’s incidence is rising.Steps should be taken in Sub-Saharan Africa to prevent an epidemic. This involvesdetailed and regular screening for cardiovascular risk factors in rural communities.Key words: RISK FACTORS, Cardio vascular disease, South South Nigeria.


BMJ Open ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. e019664 ◽  
Author(s):  
Udeme E Ekrikpo ◽  
Effiong E Akpan ◽  
John U Ekott ◽  
Aminu K Bello ◽  
Ikechi G Okpechi ◽  
...  

ObjectivesHIV infection environment presents a classic example of the interplay between infectious diseases and non-communicable diseases (NCDs). Traditional cardiovascular disease (CVD) risk factors abound in the HIV population even before initiation of antiretrovirals (ARVs) and predispose them to the development of stroke and myocardial infarction. This work focuses on determining the prevalence of traditional CVD risk factors among ARV-naive HIV individuals in southern Nigeria.MethodsThis was a cross-sectional study of ARV-naive patients initiating care at the University of Uyo Teaching Hospital HIV clinic cohort to determine the prevalence and correlates of hypertension, diabetes mellitus (DM), obesity and dyslipidaemia.ResultsThe sample consisted of 4925 assessed for hypertension, 5223 for obesity, 1818 for DM and 926 for dyslipidaemia. Hypertension prevalence was 26.7% (95% CI 25.5% to 28.0%) with a male preponderance (p=0.02). DM was found in 5.6% (95% CI 4.5% to 6.7%), obesity in 8.3% (95% CI 7.6% to 9.1%) and dyslipidaemia in 29.1% (95% CI 26.1% to 32.1%) with a high prevalence of low high-density lipoprotein-c (42.6%). Hypertension was independently associated with age (OR 1.04 (95% CI 1.03 to 1.05), p<0.001) and body mass index (BMI) (OR 1.06 (95% CI 1.03 to 1.08), p<0.001), obesity with age (OR 1.02 (95% CI 1.01 to 1.03), p<0.001), male gender (OR 0.38 (95% CI 0.29 to 0.49), p<0.001) and CD4 count (OR 2.63 (95% CI 1.96 to 3.53), p<0.001) while dyslipidaemia was associated with BMI (OR 1.05 (95% CI 1.01 to 1.10), p=0.03).ConclusionThe prevalence of traditional CVD risk factors is high in this ART-naive HIV population. An integrated approach of HIV and NCD screening/treatment may be relevant for centres in sub-Saharan Africa.


Author(s):  
Azza A Abbas ◽  
Hiba A A Ali ◽  
Mohamed A Alagib ◽  
Huda F S Salih ◽  
Isam M Elkhidir ◽  
...  

Abstract Background Hantaviruses are enveloped negative sense RNA viruses that cause hemorrhagic fever with renal syndrome. This study aimed to identify the prevalence of Hantavirus IgG antibodies and possible risk factors for Hantaviruses infections among end-stage renal disease (ESRD) patients attending the Dr Salma dialysis center in Sudan. Methodology This was a cross-sectional study in which 91 ESRD patients and 30 healthy plasma samples were screened for Hantavirus IgG antibodies using ELISA. A questionnaire containing sociodemographics, history of rat exposure and clinical data information was filled in by each ESRD patient. Results In this study, 9 out of 91 ESRD patients (9.9%) tested positive for Hantaviruses antibodies (IgG) while none of the 30 healthy plasma samples showed seropositivity. There was no statistically significant association between age, gender, educational level and rat exposure and Hantavirus infection in ESRD patients (p&gt;0.05) Conclusion This study is the first to be conducted in Sudan regarding Hantaviruses and ESRD. The prevalence of Hantavirus antibodies among ESRD patients is high compared with findings reported in the literature from studies conducted on the same group of patients. It points to an interesting question as to whether Hantaviruses have an association with ESRD but further studies are needed before drawing any conclusions.


Author(s):  
Scott M Nelson ◽  
Susanne Ehnert ◽  
Piotr S Gromski ◽  
Tim Child ◽  
Geoffrey Trew

Abstract STUDY QUESTION What is the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) viral presence and seroconversion in staff members in European fertility units prior to recommencement of clinical activity? SUMMARY ANSWER A large proportion of fertility clinic staff remain susceptible to SARS-CoV-2 with no evidence of seroconversion, indicating that continued comprehensive risk mitigation strategies are essential. WHAT IS KNOWN ALREADY In response to the coronavirus disease 2019 (COVID-19) pandemic, caused by SARS-CoV-2, routine fertility treatment was temporarily stopped in several European countries. The SARS-CoV-2 prevalence and seroconversion in fertility clinic staff, who are at potentially lower risk than routine healthcare workers, are unknown. STUDY DESIGN, SIZE, DURATION This cross-sectional study included 554 staff in 16 European IVF clinics, 13 ultrasound clinics, one diagnostic laboratory and one head office in four European countries (Austria, Denmark, Germany and the UK) between 15 April and 30 June 2020. PARTICIPANTS/MATERIALS, SETTING, METHODS There were 554 staff members returning for resumption of clinical activity. Paired nucleic acid amplification tests of oropharyngeal swabs for SARS-CoV-2 and serological testing for SARS-CoV-2 IgG were performed. MAIN RESULTS AND THE ROLE OF CHANCE Of the 554 staff members tested, 0.19% (95% CI 0.03, 1.10%) had evidence of SARS-CoV-2 as detected by RT-PCR. In contrast, 23 staff members, i.e. 4.15% (95% CI 2.78, 6.15%), had antibodies against SARS-CoV-2, with a wide range of antibody titres. There was no evidence of differences in seroconversion between countries with estimates ranging from 2.78% (95% CI 0.77, 9.58) in Austria to 6.75% (95% CI 4.46, 10.1) for the UK. There was no strong evidence of clustering within the clinics, with 21 of the 30 facilities having no staff members affected (prevalence estimates ranging from 0% to 35%), and one clinic having seven staff members affected (35% (95% CI 18.1%, 56.7%)). The single staff member who tested positive for SARS-CoV-2 virus was in the pre-symptomatic phase and was isolated, with no contacts having evidence of infection on repeat testing. LIMITATIONS, REASONS FOR CAUTION This was a cross-sectional study prior to resumption of clinical activity, with repeat testing not undertaken. WIDER IMPLICATIONS OF THE FINDINGS The low prevalence of seroconversion of fertility clinic staff highlights the need for continued comprehensive risk mitigation strategies and engagement with national endeavours to identify and isolate new cases and their contacts as we embark on the resumption of fertility services. STUDY FUNDING/COMPETING INTEREST(S) The Fertility Partnership funded the study. S.M.N. reports personal fees from Access Fertility, personal fees from Merck, personal fees from Ferring, grants and personal fees from Roche Diagnostics, personal fees from The Fertility Partnership and personal fees from Modern Fertility, outside the submitted work. T.C. reports personal fees from Merck and personal fees from Ferring, outside the submitted work. G.T. reports personal fees from Merck, personal fees from Ferring and personal fees from Roche Diagnostics, outside the submitted work. S.E. and P.S.G. report no conflicts of interest. TRIAL REGISTRATION NUMBER N/A.


2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Muzamil O. Hassan ◽  
Raquel Duarte ◽  
Victor O. Mabayoje ◽  
Caroline Dickens ◽  
Akeem O. Lasisi ◽  
...  

Abstract Background Individuals of African descent are at higher risk of developing kidney disease than their European counterparts, and HIV infection is associated with increased risk of nephropathy. Despite a safe renal profile in the clinical trials, long-term use of tenofovir disoproxil fumarate (TDF) has been associated with proximal renal tubulopathy although the underlying mechanisms remain undetermined. We aim to establish the prevalence of and risk factors for TDF-induced kidney tubular dysfunction (KTD) among HIV-I and II individuals treated with TDF in south-west Nigeria. Association between TDF-induced KTD and genetic polymorphisms in renal drug transporter genes and the APOL1 (Apolipoprotein L1) gene will be examined. Methods This study has two phases. An initial cross-sectional study will screen 3000 individuals attending the HIV clinics in south-west Nigeria for KTD to determine the prevalence and risk factors. This will be followed by a case-control study of 400 KTD cases and 400 matched controls to evaluate single nucleotide polymorphism (SNP) associations. Data on socio-demographics, risk factors for kidney dysfunction and HIV history will be collected by questionnaire. Blood and urine samples for measurements of severity of HIV disease (CD4 count, viral load) and renal function (creatinine, eGFR, phosphate, uric acid, glucose) will also be collected. Utility of urinary retinol binding protein (RBP) and N-acetyl-beta-D-glucosaminidase (NAG) levels as surrogate markers of KTD will be evaluated. Genomic DNA will be extracted from whole blood and SNP analyses performed using the rhAMP SNP genotyping assays. Statistical analysis including univariate and multivariate logistic regression analyses will be performed to identify factors associated with KTD. Discussion In spite of TDF being the most commonly used antiretroviral agent and a key component of many HIV treatment regimens, it has potential detrimental effects on the kidneys. This study will establish the burden and risk factors for TDF-induced KTD in Nigerians, and explore associations between KTD and polymorphisms in renal transporter genes as well as APOL1 risk variants. This study may potentially engender an approach for prevention as well as stemming the burden of CKD in sub-Saharan Africa where GDP per capita is low and budgetary allocation for health is inadequate.


2021 ◽  
Vol 8 ◽  
Author(s):  
Dehao Chen ◽  
Sarah L. McKune ◽  
Nitya Singh ◽  
Jemal Yousuf Hassen ◽  
Wondwossen Gebreyes ◽  
...  

Livestock farming provides a possible mechanism by which smallholder farmers can meet their household need for animal source foods (ASF), which may reduce the risk of stunting. However, direct/indirect contacts with domestic animals may increase colonization by Campylobacter spp., which has been associated with Environmental Enteric Dysfunction (EED) and stunting. A cross-sectional study involving 102 randomly selected children between 12 and 16 months of age was conducted in rural eastern Ethiopia to establish prevalence rates of Campylobacter colonization, EED, and stunting, and evaluate potential risk factors. Data were collected between September and December 2018. The prevalence of EED and stunting was 50% (95% CI: 40–60%) and 41% (95% CI: 32–51%), respectively. Among enrolled children, 56% had consumed some ASF in the previous 24 h; 47% had diarrhea and 50% had fever in the past 15 days. 54, 63, 71 or 43% of households owned at least one chicken, cow/bull, goat, or sheep; 54 (53%) households kept chickens indoors overnight and only half of these confined the animals. Sanitation was poor, with high levels of unimproved latrines and open defecation. Most households had access to an improved source of drinking water. The prevalence of Campylobacter colonization was 50% (95% CI: 41–60%) by PCR. In addition to the thermotolerant species Campylobacter jejuni, Campylobacter coli and Campylobacter upsaliensis, non-thermotolerant species related to Campylobacter hyointestinalis and Campylobacter fetus were frequently detected by Meta-total RNA sequencing (MeTRS). Current breastfeeding and ASF consumption increased the odds of Campylobacter detection by PCR, while improved drinking water supply decreased the odds of EED. No risk factors were significantly associated with stunting. Further studies are necessary to better understand reservoirs and transmission pathways of Campylobacter spp. and their potential impact on child health.


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