Browsing by Author "Lwabi, Peter"

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    Cardiac Conduction Safety during Coadministration of Artemether-Lumefantrine and Lopinavir/Ritonavir in HIV-Infected Ugandan Adults
    (Chemotherapy research and practice, 2011) Byakika-Kibwika, Pauline; Lamorde, Mohammed; Lwabi, Peter; Nyakoojo, Wilson B.; Okaba-Kayom, Violet; Mayanja-Kizza, Harriet; Boffito, Marta; Katabira, Elly; Back, David; Khoo, Saye; Merry, Concepta
    We aimed to assess cardiac conduction safety of coadministration of the CYP3A4 inhibitor lopinavir/ritonavir (LPV/r) and the CYP3A4 substrate artemether-lumefantrine (AL) in HIV-positive Ugandans. Methods. Open-label safety study of HIV positive adults administered single-dose AL (80/400 mg) alone or with LPV/r (400/100 mg). Cardiac function was monitored using continuous electrocardiograph (ECG). Results. Thirty-two patients were enrolled; 16 taking LPV/r -based ART and 16 ART naıve. All took single dose AL. No serious adverse events were observed. ECG parameters in milliseconds remained within normal limits. QTc measurements did not change significantly over 72 hours although were higher in LPV/r arm at 24 (424 versus 406; P = .02) and 72 hours (424 versus 408; P = .004) after AL intake. Conclusion. Coadministration of single dose of AL with LPV/r was safe; however, safety of six-dose AL regimen with LPV/r should be investigated.
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    Cardiac Dysfunction Among Ugandan HIV-Infected Children on Antiretroviral Therapy
    (The Pediatric infectious disease journal, 2016) Namuyonga, Judith; Lubega, Sulaiman; Musiime, Victor; Lwabi, Peter; Lubega, Irene
    Despite effective antiretroviral therapy (ART), HIV-infected children on treatment have been observed to have cardiac abnormalities. We sought to determine the prevalence, types and factors associated with cardiac abnormalities among HIV-infected Ugandan children on combination ART. Methods—We carried out a cross-sectional study from July 2012 to January 2013, at Joint Clinical Research Centre among HIV infected children aged 1 to 18 years. Cardiac abnormalities were assessed using electrocardiography (EKG) and echocardiography. CD4 counts, viral load and complete blood count were performed at enrollment. The prevalence of cardiac abnormalities was determined using simple proportions with the associated factors ascertained using logistic regression. Results—Among 285 children recruited, the median (IQR) age was 9 (6, 13) years, 54% were female; 72% were on first line cART. Their mean (±sd) CD4 count was 1092 (±868.7) cells/mm3; median (IQR) viral load was 20 (20, 76) copies/ml. 94% had adherence to ART of more than 95%. Cardiac abnormalities were detected in 39 (13.7%) children. The most common abnormalities by EKG and echocardiography were non specific T-wave changes (4.6%) and pericardial disease (thickened pericardium with or without pericardial effusion) (2.8%), respectively. No factor assessed was found to be significantly associated occurrence of cardiac dysfunction. Conclusions—The prevalence of cardiac dysfunction among the HIV-infected children on ART was 13.7 % which was high, with non specific T wave changes and pericardial disease being the most frequent abnormalities observed. No factor assessed was found to be associated with cardiac dysfunction.
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    Incidence of acute rheumatic fever in northern and western Uganda: a prospective, population-based study
    (The Lancet Global Health, 2021) Okello, Emmy; Ndagire, Emma; Muhamed, Babu; Sarnacki, Rachel; Nakitto, M.G.; Kansiime, Rosemary; Longenecker, Chris T.; Lwabi, Peter; Agaba, Collins; Omara, Isaac Otim; Oyella, Linda Mary; Rwebembera, Joselyn; Watkins, David; Carapetis, Jonathan R.
    Acute rheumatic fever is infrequently diagnosed in sub-Saharan African countries despite the high prevalence of rheumatic heart disease. We aimed to determine the incidence of acute rheumatic fever in northern and western Uganda. For our prospective epidemiological study, we established acute rheumatic fever clinics at two regional hospitals in the north (Lira district) and west (Mbarara district) of Uganda and instituted a comprehensive acute rheumatic fever health messaging campaign. Communities and health-care workers were encouraged to refer children aged 3–17 years, with suspected acute rheumatic fever, for a definitive diagnosis using the Jones Criteria. Children were referred if they presented with any of the following: (1) history of fever within the past 48 h in combination with any joint complaint, (2) suspicion of acute rheumatic carditis, or (3) suspicion of chorea. We excluded children with a confirmed alternative diagnosis. We estimated incidence rates among children aged 5–14 years and characterised clinical features of definite and possible acute rheumatic fever cases. Data were collected between Jan 17, 2018, and Dec 30, 2018, in Lira district and between June 5, 2019, and Feb 28, 2020, in Mbarara district. Of 1075 children referred for evaluation, 410 (38%) met the inclusion criteria; of these, 90 (22%) had definite acute rheumatic fever, 82 (20·0%) had possible acute rheumatic fever, and 24 (6%) had rheumatic heart disease without evidence of acute rheumatic fever. Additionally, 108 (26%) children had confirmed alternative diagnoses and 106 (26%) had an unknown alternative diagnosis. We estimated the incidence of definite acute rheumatic fever among children aged 5–14 years as 25 cases (95% CI 13·7–30·3) per 100 000 person-years in Lira district (north) and 13 cases (7·1–21·0) per 100 000 person-years in Mbarara district (west).
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    Incidence of acute rheumatic fever in northern and western Uganda: a prospective, population-based study
    (The Lancet Global Health, 2021) Okello, Emmy; Ndagire, Emma; Babu, Muhamed; Rachel, Sarnacki; Meghna, Murali; Jafesi, Pulle; Jenifer, Atala; Asha, C. Bowen; Marc, P. DiFazio; Nakitto, M. G.; Nada, S. Harik; Kansiime, Rosemary; Chris, T. Longenecker; Lwabi, Peter; Agaba, Collins; Scott, A. Norton; Omara, Isaac Otim; Oyella, Linda Mary; Tom, Parks; Rwebembera, Joselyn; Christopher, F. Spurney; Elizabeth, Stein; Laura, Tochen; David, Watkins; Meghan, Zimmerman; Jonathan, R. Carapetis; Craig, A. Sable; Andrea, Beaton
    Background Acute rheumatic fever is infrequently diagnosed in sub-Saharan African countries despite the high prevalence of rheumatic heart disease. We aimed to determine the incidence of acute rheumatic fever in northern and western Uganda. Methods For our prospective epidemiological study, we established acute rheumatic fever clinics at two regional hospitals in the north (Lira district) and west (Mbarara district) of Uganda and instituted a comprehensive acute rheumatic fever health messaging campaign. Communities and health-care workers were encouraged to refer children aged 3–17 years, with suspected acute rheumatic fever, for a definitive diagnosis using the Jones Criteria. Children were referred if they presented with any of the following: (1) history of fever within the past 48 h in combination with any joint complaint, (2) suspicion of acute rheumatic carditis, or (3) suspicion of chorea. We excluded children with a confirmed alternative diagnosis. We estimated incidence rates among children aged 5–14 years and characterised clinical features of definite and possible acute rheumatic fever cases. Findings Data were collected between Jan 17, 2018, and Dec 30, 2018, in Lira district and between June 5, 2019, and Feb 28, 2020, in Mbarara district. Of 1075 children referred for evaluation, 410 (38%) met the inclusion criteria; of these, 90 (22%) had definite acute rheumatic fever, 82 (20·0%) had possible acute rheumatic fever, and 24 (6%) had rheumatic heart disease without evidence of acute rheumatic fever. Additionally, 108 (26%) children had confirmed alternative diagnoses and 106 (26%) had an unknown alternative diagnosis. We estimated the incidence of definite acute rheumatic fever among children aged 5–14 years as 25 cases (95% CI 13·7–30·3) per 100 000 person-years in Lira district (north) and 13 cases (7·1–21·0) per 100 000 person-years in Mbarara district (west). Interpretation To the best of our knowledge, this is the first population-based study to estimate the incidence of acute rheumatic fever in sub-Saharan Africa. Given the known rheumatic heart disease burden, it is likely that only a proportion of children with acute rheumatic fever were diagnosed. These data dispel the long-held hypothesis that the condition does not exist in sub-Saharan Africa and compel investment in improving prevention, recognition, and diagnosis of acute rheumatic fever.
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    Makerere University-Uganda Heart Institute collaborative cardiovascular disease training and research since 1988.
    (African Health Sciences, 2022-08) Okello, Emmy; Ssemogerere, Lameck; Ssinabulya, Isaac; Kayima, James; Nakanjako, Damalie; Sebatta, Elias; Lubega, Sulaiman; Oketcho, Michael; Mwambu, Tom; Lwabi, Peter; Mijumbi, Cephas; Omagino, John
    Background: Makerere University College of Health Sciences has been collaborating with the Uganda Heart Institute to build capacity for research, training and clinical care in cardiovascular medicine for the last 34 years to appropriately respond to rising societal needs for advanced cardiovascular care which was lacking before this period. Aim: To describe the major milestones in the MakCHS-UHI cardiovascular training collaboration and chart way for future collaborations. Method: This short communication highlights some of the salient features and important milestones in the collaboration journey of the two institutions. Conclusion: Clinical centres of excellence in specialised fields of health care, such as the Uganda Heart Institute for Cardiology, provide a conducive academic environment for MakCHS clinical scientists to provide high quality evidence-based care to meet societal needs.
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    Prevalence of group a streptococcus pharyngeal carriage and clinical manifestations in school children aged 5–15 yrs in Wakiso District, Uganda
    (BMC Infectious Diseases, 2017) Nayiga, Irene; Okello, Emmy; Lwabi, Peter; Ndeezi, Grace
    Beta-hemolytic streptococci carrier rates in children living in low-income countries are high ranging from 10 to 50%. Although most of these children are asymptomatic, they are a reservoir and pose a risk of transmission. The aim of this study was to determine the prevalence of group a streptococcus pharyngeal carriage and clinical manifestations in school going children in Wakiso district, Uganda.A cross sectional study targeting children age 5–15 years in primary schools in one sub-county of Wakiso district was carried out. Three hundred and sixty-six children from five primary schools were enrolled and evaluated for group a streptococcus (GAS) carriage. A semi-structured questionnaire was used to collect data that included social demographics, school environment and clinical findings. For every enrolled child a throat swab was taken and cultured for GAS and blood was drawn for anti-streptolysin-O titres. Analysis of data was done using STATA.The prevalence of GAS carriage was 16%. The children with GAS positive cultures were mainly females. The factor associated with GAS carriage was the school location, with peri-urban schools more likely to have children with GAS compared to rural schools; AOR 2.48 (95% CI: 1.01 – 6.11), P = 0.049. There was no significant difference between the characteristic of children with GAS positive verses GAS negative throat swab cultures.There is a high prevalence of GAS pharyngeal carriage among children aged 5–15 years attending primary schools in Wakiso District, Uganda.
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    Prevalence of Group a Streptococcus Pharyngeal Carriage and Clinical Manifestations in School Children aged 5–15 yrs in Wakiso District, Uganda
    (BMC Infectious Diseases, 2017-04-05) Nayiga, Irene; Okello, Emmy; Lwabi, Peter; Ndeezi, Grace
    Beta-hemolytic streptococci carrier rates in children living in low-income countries are high ranging from 10 to 50%. Although most of these children are asymptomatic, they are a reservoir and pose a risk of transmission. The aim of this study was to determine the prevalence of group a streptococcus pharyngeal carriage and clinical manifestations in school going children in Wakiso district, Uganda. A cross sectional study targeting children age 5–15 years in primary schools in one sub-county of Wakiso district was carried out. Three hundred and sixty-six children from five primary schools were enrolled and evaluated for group a streptococcus (GAS) carriage. A semi-structured questionnaire was used to collect data that included social demographics, school environment and clinical findings. For every enrolled child a throat swab was taken and cultured for GAS and blood was drawn for anti-streptolysin-O titres. Analysis of data was done using STATA. The prevalence of GAS carriage was 16%. The children with GAS positive cultures were mainly females. The factor associated with GAS carriage was the school location, with peri-urban schools more likely to have children with GAS compared to rural schools; AOR 2.48 (95% CI: 1.01 – 6.11), P = 0.049. There was no significant difference between the characteristic of children with GAS positive verses GAS negative throat swab cultures. There is a high prevalence of GAS pharyngeal carriage among children aged 5–15 years attending primary schools in Wakiso District, Uganda.
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    Prevalence of latent rheumatic heart disease among HIV-infected children in Kampala, Uganda
    (Journal of acquired immune deficiency syndromes, 2016) Gleason, Brigette; Mirembe, Grace; Namuyonga, Judith; Okello, Emmy; Lwabi, Peter; Lubega, Irene; Lubega, Sulaiman; Musiime, Victor; Kityo, Cissy; Salata, Robert A.; Longenecker, Chris T.
    Rheumatic heart disease (RHD) remains highly prevalent in resource-constrained settings around the world, including countries with high rates of HIV/AIDS. Although both are immune-mediated diseases, it is unknown whether HIV modifies the risk or progression of RHD. We performed screening echocardiography to determine the prevalence of latent rheumatic heart disease in 488 HIV-infected children aged 5-18 in Kampala, Uganda. The overall prevalence of borderline/definite RHD was 0.82% (95% CI 0.26% to 2.23%) which is lower than the published prevalence rates of 1.5-4% among Ugandan children. There may be protective factors that decrease the risk of RHD in HIV-infected children.
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    Rheumatic Heart Disease Treatment Cascade in Uganda
    (Circulation: Cardiovascular Quality and Outcomes, 2017) Chris, T. Longenecker; Stephen, R. Morris; Aliku, Twalib O.; Andrea, Beaton; Marco, A. Costa; Kamya, Moses R.; Kityo, Cissy; Lwabi, Peter; Mirembe, Grace; Nampijja, Dorah; Rwebembera, Joselyn; Craig, Sable; Robert, A. Salata; Amy, Scheel; Daniel, I. Simon; Ssinabulya, Isaac; Okello, Emmy
    Background Rheumatic heart disease (RHD) is a leading cause of premature death and disability in low-income countries; however, few receive optimal benzathine penicillin G (BPG) therapy to prevent disease progression. We aimed to comprehensively describe the treatment cascade for RHD in Uganda to identify appropriate targets for intervention. Methods and Results Using data from the Uganda RHD Registry (n=1504), we identified the proportion of patients in the following care categories: (1) diagnosed and alive as of June 1, 2016; (2) retained in care; (3) appropriately prescribed BPG; and (4) optimally adherent to BPG (>80% of prescribed doses). We used logistic regression to investigate factors associated with retention and optimal adherence. Overall, median (interquartile range) age was 23 (15–38) years, 69% were women, and 82% had clinical RHD. Median follow-up time was 2.4 (0.9–4.0) years. Retention in care was the most significant barrier to achieving optimal BPG adherence with only 56.9% (95% confidence interval, 54.1%–59.7%) of living subjects having attended clinic in the prior 56 weeks. Among those retained in care, however, we observed high rates of BPG prescription (91.6%; 95% confidence interval, 89.1%–93.5%) and optimal adherence (91.4%; 95% confidence interval, 88.7–93.5). Younger age, latent disease status, and access to care at a regional center were the strongest independent predictors of retention and optimal adherence. Conclusions Our study suggests that improving retention in care—possibly by decentralizing RHD services—would have the greatest impact on uptake of antibiotic prophylaxis among patients with RHD in Uganda.
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    Secondary Antibiotic Prophylaxis for Latent Rheumatic Heart Disease
    (New England Journal of Medicine, 2022) Beaton, Andrea; Okello, Emmy; Rwebembera, Joselyn; Alepere, Juliet; Lwabi, Peter; Nakitto, Miriam; Ndagire, Emma; Omara, Isaac O.; Karthikeyan, Ganesan; Steer, Andrew C.
    Rheumatic heart disease affects more than 40.5 million people worldwide and results in 306,000 deaths annually. Echocardiographic screening detects rheumatic heart disease at an early, latent stage. Whether secondary antibiotic prophylaxis is effective in preventing progression of latent rheumatic heart disease is unknown.