Stephaney Gyaase

Ms. Stephaney Gyaase


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

View All Publications
1 August 2018 in Parasite Epidemiology and Control
Verified
Journal Article
Open access
DADennis Adu-Gyasi
Dennis Adu-Gyasi
KAKwaku Poku Asante
Kwaku Poku Asante
MFMargaret T. Frempong
Margaret T. Frempong
DGDennis Konadu Gyasi
Dennis Konadu Gyasi
LILouisa Fatahiya Iddrisu
Louisa Fatahiya Iddrisu
SOSeth Owusu-Agyei
Seth Owusu-Agyei
Helminths are among the most widespread infectious agents prevalent in tropical and sub-tropical regions of the developing world defined by inadequate sanitation, poverty and unsafe water sources. This study was carried out to describe the distribution of helminth and malaria parasite infections in the middle-belt of Ghana in sub-Saharan Africa where disease burden, including anaemia is rife and helminths are perceived to be significant contributors of the burden. A cross-sectional survey involving 1826 residents located in the middle belt of Ghana where no or very little previous community-based helminth work had been carried out. The participants randomly recruited at household level provided biological samples collected over a 12-month period following a rigorous consenting process and these were analysed to describe the different types and seasonal distribution of helminths. Overall, 19.3% intestinal helminth infection prevalence was documented. Also based on parasites targeted for elimination, 12.1% Hookworm, 4.0% Hymenolepis nana/Hymenolepis dimunita, 1.5% Ascaris lumbricoides, 1.5% Taenia species, 0.9% Strongyloides stercoralis and 0.8% Trichuris trichiura, with about 1.0% polyphelminthiasis were recorded in the survey. About 55.4% and 44.4% of the participants had heavy hookworm and Trichuris infections respectively. Most of the Ascariasis (83.3%) infections were light in intensity. Hookworm infection was identified with significant odds considering decreasing age (OR = 2.09, p = 0.03), inappropriate footwear use (OR = 1.88, p = 0.021), malaria parasite co-infection (OR = 1.62, p = 0.018), not scrubbing nails during hand washing (OR = 0.68, p = 0.048), source of drinking water (OR = 2.51, p = 0.027) and religion (OR = 4.36, p = 0.002). Hookworm infection was significantly higher in younger age groups and among those who did not have safe drinking water. Proper sanitation, protective footwear, religion and good personal hygiene practices were found to influence helminth and hookworm prevalence in the area. Malaria parasite coinfection with helminths, especially hookworm infections increased 2-fold.

28 October 2016 in BMC Pharmacology and Toxicology
Verified
Journal Article
Open access
PDF file
MTMathilda Tivura
Mathilda Tivura
IAIsaac Asante
Isaac Asante
AWAlbert van Wyk
Albert van Wyk
SGStephaney Gyaase
Stephaney Gyaase
NMNaiela Malik
Naiela Malik
SOSeth Owusu-Agyei
Seth Owusu-Agyei
Ghana changed their antimalarial drug policy from monotherapies to Artemisinin-based Combination Therapies in 2004 in order to provide more efficacious medicines for treatment of malaria. The policy change can be eroded if poor quality Artemisinin-based Combination Therapies are allowed to remain on the Ghanaian market unchecked by regulatory bodies and law enforcement agencies. The presence and prevalence of substandard and counterfeit Artemisinin-based Combination Therapies need to be determined on open markets in Ghana; a review of the current policy; identifying any gaps and making recommendations on actions to be taken in addressing gaps identified are essential as the data provided and recommendations made will help in ensuring effective control of malaria in Ghana. A field survey of antimalarial drugs was conducted in the central part of Ghana. The amount of active pharmaceutical ingredient in each Artemisinin-based Combination Therapy sample identified in the survey was measured using high performance liquid chromatographic analyses. Active pharmaceutical ingredient within the range of 85–115 % was considered as standard and active pharmaceutical ingredient results out of the range were considered as substandard. All samples were screened to confirm stated active pharmaceutical ingredient presence using mass spectrometry. A total of 256 Artemisinin-based Combination Therapies were purchased from known medicine outlets, including market stalls, hospitals/clinics, pharmacies, drug stores. Artemether lumefantrine (52.5 %) and artesunate amodiaquine (43.2 %) were the predominant Artemisinin-based Combination Therapies purchased. Of the 256 Artemisinin-based Combination Therapies purchased, 254 were tested, excluding two samples of Artesunate-SP. About 35 % of Artemisinin-based Combination Therapies were found to be substandard. Nine percent of Artemisinin-based Combination Therapies purchased were past their expiry date; no counterfeit (falsified) medicine samples were detected by either high performance liquid chromatographic or mass spectrometry. A high proportion of Artemisinin-based Combination Therapies sold in central Ghana were found to be substandard. Manufacturing of medicines that do not adhere to good manufacturing practices may have contributed to the poor quality of the Artemisinin-based Combination Therapies procured. A strict law enforcement and quality monitoring systems is recommended to ensure effective malaria case management as part of malaria control.

6 February 2016 in Malaria Journal
Verified
Journal Article
Open access
PDF file
TTTheresa Tawiah
Theresa Tawiah
KAKwaku Poku Asante
Kwaku Poku Asante
RDRebecca Akua Dwommoh
Rebecca Akua Dwommoh
AKAnthony Kwarteng
Anthony Kwarteng
SGStephaney Gyaase
Stephaney Gyaase
SOSeth Owusu-Agyei
Seth Owusu-Agyei
Malaria is one of the main health problems in the sub-Saharan Africa accounting for approximately 198 million morbidity and close to 600,000 mortality cases. Households incur out-of-pocket expenditure for treatment and lose income as a result of not being able to work or care for family members. The main objective of this survey was to assess the economic cost of treating malaria and/or fever with the new ACT to households in the Kintampo districts of Ghana where a health and demographic surveillance systems (KHDSS) are set up to document population dynamics. The study was a cross-sectional survey conducted from October 2009 to July 2011 using community members’ accessed using KHDSS population in the Kintampo area. An estimated sample size of 4226 was randomly selected from the active members of the KHDSS. A structured questionnaire was administered to the selected populates who reported of fever within the last 2 weeks prior to the visit. Data was collected on treatment-seeking behaviour, direct and indirect costs of malaria from the patient perspective. Of the 4226 households selected, 947 households with 1222 household members had fever out of which 92 % sought treatment outside home; 55 % of these were females. 31.6 % of these patients sought care from chemical shops. A mean amount of GHS 4.2 (US$2.76) and GHS 18.0 (US$11.84) were incurred by households as direct and indirect cost respectively. On average a household incurred a total cost of GHS 22.2 (US$14.61) per patient per episode. Total economic cost was lowest for those in the highest quintile and highest for those in the middle quintile. The total cost of treating fever/malaria episode is relatively high in the study area considering the poverty levels in Ghana. The NHIS has positively influenced health-seeking behaviours and reduced the financial burden of seeking care for those that are insured.

22 September 2015 in Malaria Journal
Verified
Journal Article
Open access
PDF file
AKAnthony Kwarteng
Anthony Kwarteng
KAKwaku Poku Asante
Kwaku Poku Asante
LALivesy Abokyi
Livesy Abokyi
SGStephaney Gyaase
Stephaney Gyaase
LFLawrence G. Febir
Lawrence G. Febir
SOSeth Owusu-Agyei
Seth Owusu-Agyei
In 2004, Ghana implemented the artemisinin-based combination therapy (ACT) policy. Health worker (HW) adherence to the national malaria guidelines on case-management with ACT for children below 5 years of age and older patients presenting at health facilities (HF) for primary illness consultations was evaluated 5 years post-ACT policy change. Cross-sectional surveys were conducted from 2010 to 2011 at HFs that provide curative care as part of outpatient activities in two districts located in the middle belt of Ghana to coincide with the periods of low and high malaria transmission seasons. A review of patient medical records, HW interviews, HF inventories and finger-pricked blood obtained for independent malaria microscopy were used to assess HW practices on malaria case-management. Data from 130 HW interviews, 769 patient medical records at 20 HFs over 75 survey days were individually linked and evaluated. The majority of consultations were performed at health centres/clinics (68.3 %) by medical assistants (28.6 %) and nurse aids (23.5 %). About 68.4 % of HWs had received ACT-specific training and 51.9 %, supervisory visits in the preceding 6 months. Despite the availability of malaria diagnostic test at most HFs (94 %), only 39.8 % (241) out of 605 (78.7 %) patients who reported fever were investigated for malaria. Treatment with ACT in line with the guidelines was 66.7 %; higher in <5 children compared to patients ≥5 years old. Judged against reference microscopy, only 44.8 % (107/239) of ACT prescriptions that conformed to the guidelines were “truly malaria”. Multivariate logistic regression analysis showed that HW were significantly more likely to comply with the guidelines if treatment were by low cadre of health staff, were for children below 5 years of age, and malaria test was performed. Although the majority of patients presenting with malaria received treatment according to the national malaria guidelines, there were widespread inappropriate treatment with ACT. Compliance with the guidelines on ACT use was low, 5 years post-ACT policy change. The Ghana NMCP needs to strengthen HW capacity on malaria case-management through regular training supported by effective laboratory quality control measures.

9 January 2025 in Global Heart
Verified
Journal Article
Open access
PDF file
SGStephaney Gyaase
Stephaney Gyaase
SNSolomon Nyame
Solomon Nyame
KKKerstin Klipstein-Grobusch
Kerstin Klipstein-Grobusch
KAKwaku Poku Asante
Kwaku Poku Asante
GDGeorge S. Downward
George S. Downward
Background: Increasing exposure to climatic features is strongly linked to various adverse health outcomes and mortality. While the link between these features and cardiovascular outcomes is well established, most studies are from high-income countries. Objectives: This review synthesizes evidence as well as research gaps on the relationship between climate indicators, household/ambient air pollution, and all-cause cardiovascular disease (CVD) morbidity and mortality in low- and middle-income countries (LMICs). Methods: Seven electronic databases were searched up to June 15, 2024. Articles were included if they focused on LMICs, addressed all-cause CVD morbidity and/or mortality, and studied climate or environmental exposures. Studies were selected using ASReview LAB, extracted and analyzed with random effect meta-analysis performed if sufficient articles were identified. Results & Conclusion: Out of 7,306 articles, 58 met the inclusion criteria: 26 on morbidity, 29 on mortality, and 3 on both. Exposures included PM10, PM2.5, NO2, SO2, BC, O3, CO, solid fuel usage, and temperature variation. Short-term exposure to PM2.5 was significantly associated with CVD morbidity (RR per 10 µg/m3 increase:1.006, 95% CI 1.003–1.009) and mortality (RR:1.007, 95% CI 1.002–1.012). Short-term exposure to NO2 and O3 also increased CVD mortality risk. Long-term exposure to PM2.5 elevated CVD morbidity (RR per 10 µg/m3 increase:1.131, 95% CI 1.057–1.210) and mortality (RR:1.092, 95% CI 1.030–1.159). High and low temperatures and long-term solid fuel use were linked to CVD deaths. The bulk of studies were from mainland China (72%), which may not accurately reflect the situation in other LMICs. Sub-Saharan Africa was particularly lacking, representing a major research gap.

28 January 2021 in BMC Public Health
Verified
Journal Article
Open access
PDF file
SGStephaney Gyaase
Stephaney Gyaase
KAKwaku Poku Asante
Kwaku Poku Asante
EAElisha Adeniji
Elisha Adeniji
OBOwusu Boahen
Owusu Boahen
MCMatthew Cairns
Matthew Cairns
SOSeth Owusu-Agyei
Seth Owusu-Agyei
In the phase III RTS,S /AS01 trial, significant heterogeneity in efficacy of the vaccine across study sites was seen. Question on whether variations in socio - economic status (SES) of participant contributed to the heterogeinity of the vaccine efficacy (VE) remains unknown. Data from the Phase III RTS,S /AS01 trial in children aged 5–17 months in Kintampo were re-analysed. SES of each child was derived from the Kintampo Health and Demographic Surveillance System, using principal component analysis of household assets. Extended Cox regression was used to estimate the interaction between RTS,S/AS01 VE and household SES. Protective efficacy of the RTS,S/AS0 vaccine significantly varied by participant’s household SES, thus increase in household SES was associated with an increase in protective efficacy (P-value = 0.0041). Effect modification persisted after adjusting for age at first vaccination, gender, distance from community to the health facility, child’s haemoglobin level, household size, place of residence and mothers’ educational level. Household SES may be a proxy for malaria transmission intensity. The study showed a significant modification of the RTS,S/AS01 malaria vaccine efficacy by the different levels of child’s household socio - economic status. Efficacy of GSK Biologicals’ candidate malaria vaccine (25049) against malaria disease in infants and children in Africa. NCT00866619 prospectively registered on 20 March 2009.