Natalie Schellack

Prof. Dr. Natalie Schellack

Health Sciences Department, University of Pretoria, Pretoria, South Africa
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Research Focus & Metrics

Academic Career Length

12Years (2015-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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7 June 2021 in Life
Verified
Journal Article
Open access
PDF file
BGBrian Godman
Brian Godman
AEAbiodun Egwuenu
Abiodun Egwuenu
MHMainul Haque
Mainul Haque
OMOliver ombeva Malande
Oliver ombeva Malande
Natalie SchellackNatalie Schellack
Natalie Schellack
RSR. Andrew Seaton
R. Andrew Seaton
Antimicrobial resistance (AMR) is a high priority across countries as it increases morbidity, mortality and costs. Concerns with AMR have resulted in multiple initiatives internationally, nationally and regionally to enhance appropriate antibiotic utilization across sectors to reduce AMR, with the overuse of antibiotics exacerbated by the COVID-19 pandemic. Effectively tackling AMR is crucial for all countries. Principally a narrative review of ongoing activities across sectors was undertaken to improve antimicrobial use and address issues with vaccines including COVID-19. Point prevalence surveys have been successful in hospitals to identify areas for quality improvement programs, principally centering on antimicrobial stewardship programs. These include reducing prolonged antibiotic use to prevent surgical site infections. Multiple activities centering on education have been successful in reducing inappropriate prescribing and dispensing of antimicrobials in ambulatory care for essentially viral infections such as acute respiratory infections. It is imperative to develop new quality indicators for ambulatory care given current concerns, and instigate programs with clear public health messaging to reduce misinformation, essential for pandemics. Regular access to effective treatments is needed to reduce resistance to treatments for HIV, malaria and tuberculosis. Key stakeholder groups can instigate multiple initiatives to reduce AMR. These need to be followed up.

3 August 2022 in Expert Opinion on Drug Safety
Verified
Journal Article
Open access
BGBrian Godman
Brian Godman
AEAbiodun Egwuenu
Abiodun Egwuenu
EWEvelyn Wesangula
Evelyn Wesangula
Natalie SchellackNatalie Schellack
Natalie Schellack
AKAubrey Chichonyi Kalungia
Aubrey Chichonyi Kalungia
ABAdrian J Brink
Adrian J Brink
Antimicrobial resistance (AMR) is a concern as this increases morbidity, mortality, and costs, with sub-Saharan Africa having the highest rates globally. Concerns with rising AMR have resulted in i...

30 December 2019 in Current Medical Research and Opinion
Verified
Journal Article
Closed access
BGBrian Godman
Brian Godman
MHMainul Haque
Mainul Haque
JMJudy McKimm
Judy McKimm
MBMuhamad Abu Bakar
Muhamad Abu Bakar
JSJacqueline Sneddon
Jacqueline Sneddon
RHRuaraidh Hill
Ruaraidh Hill
Introduction: Antibiotics are indispensable to maintaining human health; however, their overuse has resulted in resistant organisms, increasing morbidity, mortality and costs. Increasing antimicrobial resistance (AMR) is a major public health threat, resulting in multiple campaigns across countries to improve appropriate antimicrobial use. This includes addressing the overuse of antimicrobials for self-limiting infections, such as upper respiratory tract infections (URTIs), particularly in lower- and middle-income countries (LMICs) where there is the greatest inappropriate use and where antibiotic utilisation has increased the most in recent years. Consequently, there is a need to document current practices and successful initiatives in LMICs to improve future antimicrobial use. Methodology: Documentation of current epidemiology and management of URTIs, particularly in LMICs, as well as campaigns to improve future antimicrobial use. Results: There is still considerable concern regarding the prescribing and dispensing of antibiotics for URTIs among LMICs. This includes considerable self-purchasing, up to 100% of pharmacies in some LMICs. However, multiple activities are now ongoing to improve future use. These incorporate educational initiatives among all key stakeholder groups, as well as legislation and other activities to reduce self-purchasing, as part of National Action Plans (NAPs). Further activities are still needed though. These include increased physician and pharmacist education, starting in medical and pharmacy schools; greater monitoring of prescribing and dispensing practices, including the development of pertinent quality indicators; and targeted patient information and health education campaigns. It is recognised that such activities are more challenging in LMICs given more limited resources and a lack of healthcare professionals. Conclusion: Initiatives will grow across LMICs to reduce inappropriate prescribing and dispensing of antimicrobials for URTIs as part of NAPs and other activities, and these will be monitored.

3 October 2023 in Expert Review of Anti-infective Therapy
Verified
Journal Article
Closed access
TSTiyani Milta Sono
Tiyani Milta Sono
EYEugene Yeika
Eugene Yeika
ACAislinn Cook
Aislinn Cook
AKAubrey Chichonyi Kalungia
Aubrey Chichonyi Kalungia
SOSylvia A. Opanga
Sylvia A. Opanga
Johanna Catharina MeyerJohanna Catharina Meyer
Johanna Catharina Meyer
Antimicrobial resistance (AMR) is a global concern. Currently, the greatest mortality due to AMR is in Africa. A key driver continues to be high levels of dispensing of antibiotics without a prescription. A need to document current rates of dispensing, their rationale and potential ways forward including antimicrobial stewardship programmes (ASPs). A narrative review was undertaken. The highest rates of antibiotic purchasing were in Eritrea (up to 89.2% of antibiotics dispensed), Ethiopia (up to 87.9%), Nigeria (up to 86.5%), Tanzania (up to 92.3%) and Zambia (up to 100% of pharmacies dispensing without a prescription). However, considerable variation with no dispensing in a minority of countries and situations. Key drivers of self-purchasing included high co-payment levels for physician consultations and antibiotic costs, travel costs, convenience of pharmacies, patient requests, limited knowledge of antibiotics and AMR and weak enforcement. ASPs have been introduced in some African countries along with quality targets to reduce inappropriate dispensing, centering on educating pharmacists and patients. ASP activities need accelerating among community pharmacies alongside quality targets, with greater monitoring of pharmacists' activities to reduce inappropriate dispensing. Such activities, alongside educating patients and HCPs, should enhance appropriate dispensing of antibiotics and reduce AMR.

30 May 2019 in Journal of Chemotherapy
Verified
Journal Article
Closed access
AKAubrey Chichonyi Kalungia
Aubrey Chichonyi Kalungia
HMHaabingozi Mwambula
Haabingozi Mwambula
DMDerick Munkombwe
Derick Munkombwe
SMSarah Marshall
Sarah Marshall
Natalie SchellackNatalie Schellack
Natalie Schellack
BGBrian Godman
Brian Godman
Antimicrobial stewardship (AMS) is a key strategy promoting rational antimicrobial use. In Zambia, information on health professionals’ knowledge, attitude, and practice of AMS is limited. This study was undertaken to address this at Zambia’s leading specialized teaching hospitals. Descriptive, cross-sectional study involved 137 physicians and 61 pharmacists. AMS knowledge was relatively low among physicians (51%) and pharmacists (39%). Few physicians (9%) and pharmacists (20%) demonstrated sufficient knowledge of the basic principles of AMS. Physicians’ and pharmacists’ knowledge levels were significantly associated with years of practice, job position or practice rank, and previous AMS training. The majority (95%) perceived AMR as a current problem in their practise. Most physicians (92%) and pharmacists (86%) had not undertaken AMS training before. All indicated the need for context-specific educational interventions to promote AMS in Zambia. Despite positive perceptions, basic knowledge of AMS was relatively low. Context-specific educational interventions and capacity building are needed to address AMS gaps.

4 March 2025 in JAC-Antimicrobial Resistance
Verified
Journal Article
Open access
Zikria SaleemZikria Saleem
Zikria Saleem
Catrin MooreCatrin Moore
Catrin Moore
AKAubrey Chichonyi Kalungia
Aubrey Chichonyi Kalungia
Natalie SchellackNatalie Schellack
Natalie Schellack
Olayinka Olabode OgunleyeOlayinka Olabode Ogunleye
Olayinka Olabode Ogunleye
MSMike Sharland
Mike Sharland
Background: There are concerns globally with rising rates of antimicrobial resistance (AMR), particularly in low- and middle-income countries (LMICs). AMR is driven by high rates of inappropriate prescribing and dispensing of antibiotics, particularly Watch antibiotics. To develop future interventions, it is important to document current knowledge, attitudes and practices (KAP) among key stakeholder groups in LMICs. Methods: We undertook a narrative review of published papers among four WHO Regions including African and Asian countries. Relevant papers were sourced from 2018 to 2024 and synthesized by key stakeholder group, country, WHO Region, income level and year. The findings were summarized to identify pertinent future activities for all key stakeholder groups. Results: We sourced 459 papers, with a large number coming from Africa (42.7%). An appreciable number dealt with patients’ KAP (33.1%), reflecting their influence on the prescribing and dispensing of antibiotics. There was marked consistency of findings among key stakeholder groups across the four WHO Regions, all showing concerns with high rates of prescribing of antibiotics for viral infections despite professed knowledge of antibiotics and AMR. There were similar issues among dispensers. Patients’ beliefs regarding the effectiveness of antibiotics for self-limiting infectious diseases were a major challenge, although educational programmes did improve knowledge. The development of the AWaRe (Access, Watch and Reserve) system, including practical prescribing guidance, provides a future opportunity for the standardization of educational inputs. Conclusions: Similar KAP regarding the prescribing and dispensing of antibiotics across LMICs and stakeholder groups presents clear opportunities for standardization of educational input and practical training programmes based on the AWaRe system.