Browsing by Author "Mahomed, Hassan"

Now showing 1 - 13 of 13
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    The acceptability of three vaccine injections given to infants during a single clinic visit in South Africa
    (BioMed Central, 2016) Tabana, Hanani; Dudley, Lilian; Knight, Stephen; Cameron, Neil; Mahomed, Hassan; Goliath, Charlyn; Eggers, Rudolf; Wiysonge, Charles S.
    ENGLISH SUMMARY : Background: The Expanded Programme on Immunisation (EPI) has increased the number of antigens and injections administered at one visit. There are concerns that more injections at a single immunisation visit could decrease vaccination coverage. We assessed the acceptability and acceptance of three vaccine injections at a single immunisation visit by caregivers and vaccinators in South Africa. Methods: A mixed methods exploratory study of caregivers and vaccinators at clinics in two provinces of South Africa was conducted. Quantitative and qualitative data were collected using questionnaires as well as observations of the administration of three-injection vaccination sessions. Results: The sample comprised 229 caregivers and 98 vaccinators. Caregivers were satisfied with the vaccinators’ care (97 %) and their infants receiving immunisation injections (93 %). However, many caregivers, (86 %) also felt that three or more injections were excessive at one visit. Caregivers had limited knowledge of actual vaccines provided, and reasons for three injections. Although vaccinators recognised the importance of informing caregivers about vaccination, they only did this sometimes. Overall, acceptance of three injections was high, with 97 % of caregivers expressing willingness to bring their infant for three injections again in future visits despite concerns about the pain and discomfort that the infant experienced. Many (55 %) vaccinators expressed concern about giving three injections in one immunisation visit. However, in 122 (95 %) observed three-injection vaccination sessions, the vaccinators administered all required vaccinations for that visit. The remaining seven vaccinations were not completed because of vaccine stock-outs. Conclusions: We found high acceptance by caregivers and vaccinators of three injections. Caregivers’ poor understanding of reasons for three injections resulted from limited information sharing by vaccinators for caregivers. Acceptability of three injections may be improved through enhanced vaccinator-caregiver communication, and improved management of infants’ pain. Vaccinator training should include evidence-informed ways of communicating with caregivers and reducing injection pain. Strategies to improve acceptance and acceptability of three injections should be rigorously evaluated as part of EPI’s expansion in resource-limited countries.
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    Are central hospitals ready for national health insurance? ICD coding quality from an electronic patient discharge record for clinicians
    (Health & Medical Publishing Group, 2016-02) Dyers, Robin E.; Evans, Juliet; Ward, Grant Alex; Du Plooy, Shane; Mahomed, Hassan
    ENGLISH SUMMARY : Background. South Africa (SA)’s planned National Health Insurance reforms require the use of International Statistical Classification of Diseases (ICD) codes for hospitals to purchase services from the proposed National Health Authority. However, compliance with coding at public hospitals in the Western Cape Province has been challenging. A computer application was developed to aid clinicians in integrating ICD coding into the patient hospital discharge process.Objective. To evaluate the quality of ICD codes captured using the application and predictors thereof in a single hospital department.Methods. After 6 months, the quality of ICD codes was determined by comparing ICD code descriptors with medical concepts in a random sample of original patient records selected over a 6-week period. Patient and personnel characteristics influencing quality of coding, derived from a theoretical framework, were collected.Results. Of 223 patient records, 45.3% (95% confidence interval (CI) 38.8 - 51.9) had complete ICD codes. Primary ICD code accuracy was 74.0% (95% CI 67.8 - 79.5). Patient characteristics such as female gender, younger age group and fewer comorbidities, as well as seniority of clinician rank, were significantly associated with ICD coding being complete on adjusted analysis.Conclusion. The results of this study describe ICD coding quality at a central hospital in SA supported by a computer application and the factors influencing this. More interventions are required to achieve reliable coding data, such as additional ICD coding validation tools, training and oversight of junior clinicians.
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    The candidate TB vaccine, MVA85A, induces highly durable Th1 responses
    (PLoS, 2014-02) Tameris, Michele; Geldenhuys, Hennie; Luabeya, Angelique KanyKany; Smit, Erica; Hughes, Jane E.; Vermaak, Samantha; Hanekom, Willem A.; Hatherill, Mark; Mahomed, Hassan; McShane, Helen; Scriba, Thomas J.
    Background: Vaccination against tuberculosis (TB) should provide long-term protective immunity against Mycobacterium tuberculosis (M.tb). The current TB vaccine, Bacille Calmette-Guerin (BCG), protects against disseminated childhood TB, but protection against lung TB in adolescents and adults is variable and mostly poor. One potential reason for the limited durability of protection may be waning of immunity through gradual attrition of BCG-induced T cells. We determined if a MVA85A viral-vector boost could enhance the durability of mycobacteria-specific T cell responses above those induced by BCG alone. Methods: We describe a long-term follow-up study of persons previously vaccinated with MVA85A. We performed a medical history and clinical examination, a tuberculin skin test and measured vaccine-specific T cell responses in persons previously enrolled as adults, adolescents, children or infants into three different Phase II trials, between 2005 and 2011. Results: Of 252 potential participants, 183 (72.6%) consented and completed the study visit. Vaccine-induced Ag85A-specific CD4+ T cell responses were remarkably persistent in healthy, HIV-uninfected adults, adolescents, children and infants, up to 6 years after MVA85A vaccination. Specific CD4+ T cells expressed surface markers consistent with either CD45RA−CCR7+ central memory or CD45RA−CCR7− effector memory T cells. Similarly durable Ag85A-specific CD4+ T cell responses were detected in HIV-infected persons who were on successful antiretroviral therapy when MVA85A was administered. By contrast, Ag85A-specific CD4+ T cell frequencies in untreated MVA85A-vaccinated HIV-infected persons were mostly undetectable 3–5 years after vaccination. Conclusion: MVA85A induces remarkably durable T cell responses in immunocompetent persons. However, results from a recent phase IIb trial of MVA85A, conducted in infants from the same geographic area and study population, showed no vaccine efficacy, suggesting that these durable T cell responses do not enhance BCG-induced protection against TB in infants.
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    Doing more with less : a qualitative investigation of perceptions of South African health service managers on implementation of health innovations
    (Oxford University Press, 2019) Brooke-Sumner, Carrie; Petersen-Williams, Petal; Kruger, James; Mahomed, Hassan; Myers, Bronwyn
    Building resilience in health systems is an imperative for low- and middle- income countries. Health service managers’ ability to implement health innovations may be a key aspect of resilience in primary healthcare facilities, promoting adaptability and functionality. This study investigated health service managers’ perceptions and experiences of adopting health innovations. We aimed to identify perceptions of constraints to adoption and emergent behaviours in response to these constraints. A convenience sample of 34 facility, clinical service and sub-district level managers was invited to participate. Six did not respond and were not contactable. In-depth individual interviews in a private space at participants’ place of work were conducted with 28 participants. Interviews were audio recorded and transcribed verbatim. NVivo 11 was used to store data and facilitate framework analysis. Study participants described constraints to innovation adoption including: staff lack of understanding of potential benefits; staff personalities, attitudes and behaviours which lead to resistance to change; high workload related to resource constraints and frequent policy changes inducing resistance to change; and suboptimal communication through health system structures. Managers reported employing various strategies to mitigate these constraints. These comprised (1) technical skills including participatory management skills, communication skills, community engagement skills and programme monitoring and evaluation skills, and (2) non-technical skills including role modelling positive attitudes, understanding staff personalities, influencing perceptions of innovations, influencing organizational climate and building trusting relationships. Managers have a vital role in the embedding of service innovations into routine practice. We present a framework of technical and non-technical skills that managers need to facilitate the adoption of health innovations. Future efforts to build managers’ capacity to implement health innovations should target these competencies.
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    Estimating vaccine confidence levels among healthcare staff and students of a tertiary institution in South Africa
    (MDPI, 2021) Oduwole, Elizabeth O.; Esterhuizen, Tonya; Mahomed, Hassan; Wiysonge, Charles S.
    Healthcare workers were the first group scheduled to receive COVID-19 vaccines when they became available in South Africa. Therefore, estimating vaccine confidence levels and intention to receive COVID-19 vaccines among healthcare workers ahead of the national vaccination roll-out was imperative. We conducted an online survey from 4 February to 7 March 2021, to assess vaccine sentiments and COVID-19 vaccine intentions among healthcare staff and students at a tertiary institution in South Africa. We enrolled 1015 participants (74.7% female). Among the participants, 89.5% (confidence interval (CI) 87.2–91.4) were willing to accept a COVID-19 vaccine, 95.4% (CI 93.9–96.6) agreed that vaccines are important for them, 95.4% (CI 93.8–96.6) that vaccines are safe, 97.4% (CI 96.2–98.3) that vaccines are effective, and 96.1% (CI 94.6–97.2) that vaccines are compatible with religion. Log binomial regression revealed statistically significant positive associations between COVID-19 vaccine acceptance and the belief that vaccines are safe (relative risk (RR) 32.2, CI 4.67–221.89), effective (RR 21.4, CI 3.16–145.82), important for children (RR 3.5, CI 1.78–6.99), important for self (RR 18.5, CI 4.78–71.12), or compatible with religion (RR 2.2, CI 1.46–3.78). The vaccine confidence levels of the study respondents were highly positive. Nevertheless, this could be further enhanced by targeted interventions.
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    From easing lockdowns to scaling up community-based coronavirus disease 2019 screening, testing, and contact tracing in Africa-shared approaches, innovations, and challenges to minimize morbidity and mortality
    (Oxford University Press, 2020-05) Nachega, Jean B.; Grimwood, Ashraf; Mahomed, Hassan; Fatti, Geoffrey; Preiser, Wolfgang; Kallay, Oscar; Mbala, Placide K.; Muyembe, Jean-Jacques T.; Rwagasore, Edson; Nsanzimana, Sabin; Ngamije, Daniel; Condo, Jeanine; Sidat, Mohsin; Noormahomed, Emilia V.; Reid, Michael; Lukeni, Beatrice; Suleman, Fatima; Mteta, Alfred; Zumla, Alimuddin
    The arrival of coronavirus disease 2019 (COVID-19) on the African continent resulted in a range of lockdown measures that curtailed the spread of the infection but caused economic hardship. African countries now face difficult choices regarding easing of lockdowns and sustaining effective public health control measures and surveillance. Pandemic control will require efficient community screening, testing, and contact tracing; behavioral change interventions; adequate resources; and well-supported, community-based teams of trained, protected personnel. We discuss COVID-19 control approaches in selected African countries and the need for shared, affordable, innovative methods to overcome challenges and minimize mortality. This crisis presents a unique opportunity to align COVID-19 services with those already in place for human immunodeficiency virus, tuberculosis, malaria, and non communicable diseases through mobilization of Africa's interprofessional healthcare workforce. By addressing the challenges, the detrimental effect of the COVID-19 pandemic on African citizens can be minimized.
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    From easing lockdowns to scaling-up community-based COVID-19 screening, testing, and contact tracing in Africa : shared approaches, innovations, and challenges to minimize morbidity and mortality
    (Oxford University Press, 2020) Nachega, Jean B.; Grimwood, Ashraf; Mahomed, Hassan; Fatti, Geoffrey; Preiser, Wolfgang; Kallay, Oscar; Mbala, Placide K.; Muyembe, Jean-Jacques T.; Rwagasore, Edson; Nsanzimana, Sabin; Ngamije, Daniel; Condo, Jeanine; Sidat, Moshin; Noormahomed, Emilia V.; Reid, Michael; Lukeni, Beatrice; Suleman, Fatima; Mteta, Alfred; Zumla, Alimuddin
    The arrival of COVID-19 to the African continent resulted in a range of locally relevant lockdown measures, which curtailed the spread of SARS-CoV-2 but caused economic hardship for large sections of the population. African countries now face difficult choices regarding easing of lockdowns and sustaining effective public health control measures and surveillance. Control of the COVID-19 pandemic will require efficient community screening, testing, contact tracing, and behavioral change interventions, adequate resources, and a well-supported, community-based team of trained, protected personnel. We discuss COVID-19 screening-testing-contact tracing approaches used in selected African countries and the need for shared, affordable, innovative methods to overcome challenges and minimize mortality rates. This crisis presents a unique opportunity to align COVID-19 services with those already in place for HIV, TB, Malaria, and other non-communicable diseases (NCDs) through mobilization of Africa's inter-professional healthcare workforce to contain the pandemic. By addressing the challenges, the detrimental effect of the COVID-19 pandemic on African citizens can be minimized.
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    Inflammatory and myeloid-associated gene expression before and one day after infant vaccination with MVA85A correlates with induction of a T cell response
    (BioMed Central, 2014-06) Matsumiya, Magali; Harris, Stephanie A.; Satti, Iman; Stockdale, Lisa; Tanner, Rachel; O’Shea, Matthew K.; Tameris, Michelle; Mahomed, Hassan; Hatherill, Mark; Scriba, Thomas J.; Hanekom, Willem A.; McShane, Helen; Fletcher, Helen A.
    Background: Tuberculosis (TB) remains a global health problem, with vaccination likely to be a necessary part of a successful control strategy. Results of the first Phase 2b efficacy trial of a candidate vaccine, MVA85A, evaluated in BCG-vaccinated infants were published last year. Although no improvement in efficacy above BCG alone was seen, cryopreserved samples from this trial provide an opportunity to study the immune response to vaccination in this population. Methods: We investigated blood samples taken before vaccination (baseline) and one and 28 days post-vaccination with MVA85A or placebo (Candin). The IFN-γ ELISpot assay was performed at baseline and on day 28 to quantify the adaptive response to Ag85A peptides. Gene expression analysis was performed at all three timepoints to identify early gene signatures predictive of the magnitude of the subsequent adaptive T cell response using the significance analysis of microarrays (SAM) statistical package and gene set enrichment analysis. Results: One day post-MVA85A, there is an induction of inflammatory pathways compared to placebo samples. Modules associated with myeloid cells and inflammation pre- and one day post-MVA85A correlate with a higher IFN-γ ELISpot response post-vaccination. By contrast, previous work done in UK adults shows early inflammation in this population is not associated with a strong T cell response but that induction of regulatory pathways inversely correlates with the magnitude of the T cell response. This may be indicative of important mechanistic differences in how T cell responses develop in these two populations following vaccination with MVA85A. Conclusion: The results suggest the capacity of MVA85A to induce a strong innate response is key to the initiation of an adaptive immune response in South African infants but induction of regulatory pathways may be more important in UK adults. Understanding differences in immune response to vaccination between populations is likely to be an important aspect of developing successful vaccines and vaccination strategies.
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    Justice through the J88 : the doctor's role in the criminal justice system
    (Health & Medical Publishing Group, 2013-06-05) Rowe, Kirsten; Botha, Hendrik; Mahomed, Hassan; Schlemmer, Arina
    No abstract available.
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    Participatory development of a minimum dataset for the Khayelitsha district
    (Health & Medical Publishing Group, 2000-03) Mash, B.; Mahomed, Hassan
    Background. Traditional 'data-led' information systems have created excessive amounts of poor-quality and poorly utilised data. The Health Information Systems Pilot Project (HISPP), a Western Cape project that started in 1996, initiated a process in one of its three pilot sites to model an alternative approach to developing a district health information system. Objective. To develop a minimum dataset for Khayelitsha as part of an action-led district health and management information system in a participatory 'bottom-up' process. Method. The HISPP, in conjunction with health workers in the proposed Khayelitsha district, developed a minimum dataset through a process of defining local goals, targets and indicators. This dataset was integrated with data requirements at regional and provincial levels. Results. A minimum dataset was produced that defined all the data needed according to the frequency of reporting and the level at which it was required. Conclusion. The HISPP has demonstrated an alternative model for defining health information needs at district level. This participatory process has enabled health workers to appraise their own information needs critically and has encouraged local use of information for planning and action.
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    Student experiences of participating in five collaborative blended learning courses in Africa and Asia : a survey
    (Taylor & Francis Open, 2016) Atkin, Salla; Yan, Weirong; Meragi, Elnta; Mahomed, Hassan; Rosales- Klintz, Senia; Skinner, Donald; Zwarenstei, Merrick
    ENGLISH SUMMARY : Background: As blended learning (BL; a combination of face-to-face and e-learning methods) becomes more commonplace, it is important to assess whether students find it useful for their studies. ARCADE HSSR and ARCADE RSDH (African Regional Capacity Development for Health Systems and Services Research; Asian Regional Capacity Development for Research on Social Determinants of Health) were unique capacity-building projects, focusing on developing BL in Africa and Asia on issues related to global health. Objective: We aimed to evaluate the student experience of participating in any of five ARCADE BL courses implemented collaboratively at institutions from Africa, Asia, and Europe. Design: A post-course student survey with 118 students was conducted. The data were collected using email or through an e-learning platform. Data were analysed with SAS, using bivariate and multiple logistic regression. We focused on the associations between various demographic and experience variables and student-reported overall perceptions of the courses. Results: In total, 82 students responded to the survey. In bivariate logistic regression, the course a student took [p 0.0067, odds ratio (OR) 0.192; 95% confidence interval (CI): 0.058 0.633], male gender of student (p 0.0474, OR 0.255; 95% CI: 0.066 0.985), not experiencing technical problems (p B 0.001, OR 17.286; 95% CI: 4.629 64.554), and reporting the discussion forum as adequate for student needs (p 0.0036, OR 0.165; 95% CI: 0.049 0.555) were found to be associated with a more positive perception of BL, as measured by student rating of the overall helpfulness of the e-learning component to their studies. In contrast, perceiving the assessment as adequate was associated with a worse perception of overall usefulness. In a multiple regression, the course, experiencing no technical problems, and perceiving the discussion as adequate remained significantly associated with a more positively rated perception of the usefulness of the online component of the blended courses. Discussion: The results suggest that lack of technical problems and functioning discussion forums are of importance during BL courses focusing on global health-related topics. Through paying attention to these aspects, global health education could be provided using BL approaches to student satisfaction.
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    Temperature variability and occurrence of diarrhoea in children under five-years-old in Cape Town Metropolitan Sub-Districts
    (MDPI, 2016) Musengimana, Gentille; Mukinda, Fidele K.; Machekano, Roderick; Mahomed, Hassan
    This paper describes the relationship between temperature change and diarrhoea in under five-year-old children in the Cape Town Metropolitan Area (CTMA) of South Africa. The study used climatic and aggregated surveillance diarrhoea incidence data of two peak periods of seven months each over two consecutive years. A Poisson regression model and a lagged Poisson model with autocorrelation was performed to test the relationship between climatic parameters (minimum and maximum temperature) and incidence of diarrhoea. In total, 58,617 cases of diarrhoea occurred in the CTMA, which is equivalent to 8.60 cases per 100 population under five years old for the study period. The mixed effect overdispersed Poisson model showed that a cluster adjusted effect of an increase of 5 °C in minimum and maximum temperature results in a 40% (Incidence risk ratio IRR: 1.39, 95% CI 1.31–1.48) and 32% (IRR: 1.32, 95% CI: 1.22–1.41) increase in incident cases of diarrhoea, respectively, for the two periods studied. Autocorrelation of one-week lag (Autocorrelation AC 1) indicated that a 5 °C increase in minimum and maximum temperature led to 15% (IRR: 1.46, 95% CI: 1.09–1.20) and 6% (IRR: 1.06, 95% CI: 1.01–1.12) increase in diarrhoea cases, respectively. In conclusion, there was an association between an increase in minimum and maximum temperature, and the rate at which diarrhoea affected children under the age of five years old in the Cape Town Metropolitan Area. This finding may have implications for the effects of global warming and requires further investigation.
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    Tracking progress on the health status and service delivery outcomes for neonates and children in the Metro West geographic service area of the Cape Metropole, 2010 - 2015
    (Health & Medical Publishing Group, 2019-04) Hendricks, M. K.; Hawkridge, A.; Jacobs, L.; Evans, J.; Mahomed, Hassan; Linley, L.; Westwood, A.
    Background. Monitoring the health status of populations of children is one of the building blocks of the health system. The provision of an indicator dashboard with disaggregated data that are collected over time can be used to gauge the performance of the health system, guide the allocation of resources and prioritise health interventions within districts. Objectives. To determine neonatal and child mortality, morbidity and health service outcomes over a 6-year period in the Metro West geographic service area (GSA) of the Cape Town metropole. Methods. A dashboard with key indicators was developed using existing data. Results. From 2010 to 2015, there was a decrease in the perinatal mortality rate from 31.7 to 24.8 per 1 000 deliveries, and the early neonatal and neonatal mortality rates from 7.8 and 8.6 to 7.0 and 8.2 per 1 000 live births, respectively. The main obstetric causes of early neonatal deaths were antepartum haemorrhage (22 - 24%) and unexplained intrauterine death (13 - 16%); the main neonatal causes were immaturity (17 - 34%), congenital abnormalities (23 - 29%) and hypoxia (23 - 26%). Under-five mortality decreased in 2013 from 25 to 22 per 1 000 live births, with the main causes being neonatal conditions (32%), pneumonia (25%), congenital abnormalities (9%), injuries (8%) and diarrhoea (8%). Fifty percent of child deaths were out of hospital, with pneumonia and diarrhoea accounting for more than half of these. There was an improvement in health service coverage rates in 2015: immunisation <1 year old (99%); measles second dose (85%), pneumococcal third dose (100%) and rotavirus second dose (100%); maternal antiretroviral coverage (90%); HIV testing in mothers (93%); HIV DNA polymerase chain reaction testing in babies (97%); and a decrease in HIV transmission (2%). Exclusive breastfeeding coverage rates at 14 weeks, and vitamin A supplementation at 12 - 59 months, were only 30% and 44%, respectively, across the GSA. Conclusion. There was a decrease in perinatal, early neonatal, infant and under-five mortality in Metro West over the 6 years. Further reductions in under-five mortality will require focusing on interventions to reduce neonatal and out-of-hospital deaths across the service delivery platform. Home visits to at-risk mothers and infants by community health workers could prevent out-of-hospital deaths and improve exclusive breastfeeding and vitamin A coverage. This will require increasing the number of community health workers and broadening their scope of practice.