scholarly journals Feasibility and acceptability of early infant screening for sickle cell disease in Lagos, Nigeria—A pilot study

PLoS ONE ◽  
2020 ◽  
Vol 15 (12) ◽  
pp. e0242861
Author(s):  
Esther O. Oluwole ◽  
Titilope A. Adeyemo ◽  
Gbemisola E. Osanyin ◽  
Oluwakemi O. Odukoya ◽  
Phyllis J. Kanki ◽  
...  

In Nigeria, about 150000 babies are born annually with sickle cell disease (SCD), and this figure has been estimated to increase by 100% by the year 2050 without effective and sustainable control strategies. Despite the high prevalence, newborn screening for SCD which allows for early prophylactic treatment, education of parents/guardians and comprehensive management is not yet available. This study explored a strategy for screening in early infancy during the first and second immunization visits, determined the prevalence, feasibility and acceptability of early infant screening for SCD and the evaluation of the HemoTypeSC diagnostic test as compared to the high-performance liquid chromatography (HPLC) gold standard. A cross-sectional study was conducted in two selected primary health care centres in Somolu local government area (LGA) in Lagos, Nigeria. Two hundred and ninety-one mother-infant pairs who presented for the first or second immunization visit were consecutively enrolled in the study following written informed consent. The haemoglobin genotype of mother-infant pairs was determined using the HemoTypeSC rapid test kit. Confirmation of the infants’ Hb genotype was done with HPLC. Data were analysed with SPSS version 22. Validity and Predictive value of HemotypeSC rapid screening test were also calculated. Infant screening for SCD was acceptable to 86% of mothers presenting to the immunization clinics. The prevalence of SCD among the infant cohort was 0.8%. The infants diagnosed with SCD were immediately enrolled in the paediatric SCD clinic for disease-specific care. The HemoTypeSC test had 100% sensitivity and specificity for sickle cell disease in early infancy compared to HPLC. This study affirms that it is feasible and acceptable for mothers to implement a SCD screening intervention program in early infancy in Lagos State. The study also demonstrates the utility of the HemotypeSC rapid testing for ease and reduced cost of screening infants for SCD.

2009 ◽  
Vol 14 (4) ◽  
pp. 330-336 ◽  
Author(s):  
Eszter Pais ◽  
John S. Cambridge ◽  
Cage S. Johnson ◽  
Herbert J. Meiselman ◽  
Timothy C. Fisher ◽  
...  

Although the pathophysiology and molecular basis of sickle cell disease (SCD) were described more than half a century ago, an effective and safe therapy is not yet available. This may be explained by the lack of a suitable high-throughput technique that allows rapid screening of thousands of compounds for their antisickling effect. The authors have thus developed a novel high-throughput screening (HTS) assay based on detecting the ability of red blood cells (RBC) to traverse a column of tightly packed Sephacryl chromatography beads. When deoxygenated, sickle RBC are rigid and remain on the top of the column. However, when deoxygenated and treated with an effective antisickling agent, erythrocytes move through the Sephacryl media and produce a red dot on the bottom of the assay tubes. This approach has been adapted to wells in a 384-well microplate. Results can be obtained by optical scanning: The size of the red dot is proportional to the antisickling effect of the test molecule. The new assay is simple, inexpensive, reproducible, requires no special reagents, and should be readily adaptable to robotic HTS systems. It has the potential to identify novel drug candidates, allowing the development of new therapeutic options for individuals affected with SCD. ( Journal of Biomolecular Screening. 2009:330-336)


2017 ◽  
Vol 34 (3) ◽  
pp. 355-366 ◽  
Author(s):  
Christyne Gomes Toledo de OLIVEIRA ◽  
Sônia Regina Fiorim ENUMO ◽  
Kely Maria Pereira de PAULA

Abstract Pain is common in Sickle Cell Disease. This study proposes a Psychological Intervention Program for Children with Sickle Cell Disease (Intervenção Psicológica para Crianças com Anemia Falciforme). It was applied to seven children in a hospital. The intervention was based in the Motivational Theory of Coping and includes the Coping with Pain Game (Jogo “Enfrentando a Dor”). The Computerized Assessment Instrument of Coping with Hospitalization-Pain (Instrumento Computadorizado para Avaliação do Enfrentamento da Hospitalização-Dor) was applied before and after seven weekly sessions. The results showed significant increase in the facilitating behaviors to cope with pain, and in problem-solving, an adaptive coping; and a reduction in the non-facilitating behaviors and in rumination, a maladaptive coping. The stressor perception as a challenge to the need of competence increased, whereas the stressor perception as a threat to the need of competence and autonomy decreased. This intervention may have contributed to promote adaptive coping with pain.


Blood ◽  
2015 ◽  
Vol 126 (23) ◽  
pp. 979-979
Author(s):  
Nathaniel Z. Piety ◽  
Alex George ◽  
Sonia Serrano ◽  
Maria Rosa Lanzi ◽  
Palka R. Patel ◽  
...  

Abstract Newborn screening for sickle cell disease (SCD) in developing countries is limited by the cost and technical complexity of current screening methodologies and the delayed availability of screening results. We have recently developed a rapid diagnostic test for SCD that can quickly and inexpensively identify blood samples containing hemoglobin S. We hypothesized that our rapid test would be practical for use in a resource-limited setting in Cabinda, Angola, and that screening mothers or neonates for the presence of hemoglobin S in blood samples would be an effective means of identifying neonates at high risk of having sickle cell disease prior to more definitive testing. After informed consent, we collected blood samples heel-stick from neonates and by finger-stick from mothers at the primary obstetric hospital in Cabinda. We then tested these samples by the rapid SCD test and scored them by visual assessment of staining patterns. Neonates were scored as positive (HbS detected) or negative (no HbS detected) and mothers as AA, AS (sickle trait), or SS (sickle cell disease). Neonatal samples were subsequently tested by isoelectric focusing (IEF) electrophoresis to determine exact sickle cell status. In a cohort of 133 mother-neonate pairs, we used rapid testing on maternal samples to categorize neonates as high-risk (mother positive for HbS) or low-risk (mother negative for HbS). The rapid test was highly accurate in identifying neonates who could be excluded from IEF testing, with a negative predictive value of 93% (Figure 1). In a cohort of 95 neonates similarly triaged by rapid testing on neonatal samples, the negative predictive value of the test was 96% (Figure 2). In both cohorts, the one neonate with HbSS disease was successfully triaged into the high-risk group. Maternal screening with the rapid test would have reduced the proportion of neonates requiring confirmatory IEF testing to 19%, while neonatal screening would have reduced this proportion to 26%. These results indicate the potential utility of the rapid diagnostic test as a screening tool prior to more definitive testing. Used in combination with confirmatory IEF, our rapid test could significantly decrease the cost of newborn screening for SCD and increase its clinical utility by permitting more rapid identification of affected infants. Disclosures Piety: Halcyon Biomedical: Patents & Royalties: Mr. Piety is a co-inventor on a utility PCT application, "Paper-based diagnostic test" (PCT/US2012/064856, 11/13/2012), claiming priority benefit of U.S. 61/692,994 (8/24/2012) and U.S. 61/558,009 (11/10/2011). . Shevkoplyas:Halcyon Biomedical: Equity Ownership, Patents & Royalties: Co-inventor on a utility PCT application, "Paper-based diagnostic test" (PCT/US2012/064856, 11/13/2012), claiming priority benefit of U.S. 61/692,994 (8/24/2012) and U.S. 61/558,009 (11/10/2011). Part-owner of Halcyon Biomedical Inc.,.


2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Jeannette Bassimbié Kakou Danho ◽  
Yao Nicaise Atiméré ◽  
Daouda Koné ◽  
Donafologo Daouda Yéo ◽  
Line Couitchéré

Sickle cell disease is a hereditary disease that predominantly affects black people. It is very widespread in sub-Saharan Africa, particularly at the Lehmann “sickle belt” level, where the prevalence of the hemoglobin S involves at least 10% of the population in West Africa and can reach 40% in Central Africa. In Côte d’Ivoire, the prevalence of the hemoglobin S is about 12–14% in the general population and about 11.71% in the child population in Abidjan. On the other hand, its coexistence with other hemoglobin phenotypes such as AC (6.2%) and β-thalassemia (2.7%) traits may also cause composite heterogeneous sickle cell disease, e.g., SC or S/β-thalassemia in this study. Since 2009, sickle cell disease has been recognized as a public health problem; however, much still remains to be performed despite the progress achieved. The objective of this study is thus to promote a rapid screening for the struggling against sickle cell disease in Côte d’Ivoire. This study was carried out over 6 months (April–September 2019) and has included 336 children, of which 236 all-comers, recruited in the municipality of Treichville in Abidjan and 100 other children with already known hemoglobin phenotype followed up in the Hematology Department of the University Hospital of Treichville. Two tests were used: the HemoTypeSC™ for rapid screening and the hemoglobin electrophoresis which is the reference method used for confirming the diagnosis in the laboratory. The findings confirmed the reliability of the HemoTypeSC™ with a sensitivity and specificity at 100% for the detection of hemoglobin A, S, and C. On the other hand, this sensitivity and specificity drop to 98.2% and 99.7%, respectively, when we analyze all the 336 children together, including the cases with HbF detected by hemoglobin electrophoresis. Hence, the importance of performing certainty tests following the HemoTypeSC™ screening test in order to determine the accurate phenotypes and proportions of the types of hemoglobin. The prevalence of hemoglobin S in subgroup 1 of 236 children of all-comers was 15%. The HemoTypeSC™ is therefore reliable, inexpensive, and disposable for rapid screening and early detection of sickle cell disease in Côte d’Ivoire. The HemoTypeSC™ provides rapid detection of hemoglobin phenotypes HbAA, HbSS, HbSC, HbCC, HbAS, and HbAC.


Blood ◽  
2019 ◽  
Vol 134 (Supplement_1) ◽  
pp. 2165-2165
Author(s):  
Kristine Anne Karkoska ◽  
Kenneth Haber ◽  
Patrick T. McGann

Introduction: Neurocognitive deficits are a well-known complication in patients with sickle cell disease (SCD) and are often associated with overt stroke and silent infarctions. However, cognitive deficits may be seen in patients even without apparent MRI findings as compared to non-affected controls. Studies have also shown the impact of socioeconomic status and parental education on school retention and cognition in patients with SCD. More specifically, rates of retention and special education service use through either an Individualized Education Plan (IEP, providing specialized education services) or 504 Plan (providing accommodations due to physical disability/medical diagnosis) are reported as high as 40%. However, these historical data have been limited to primarily adolescent patients. Thus, a more thorough analysis is needed to better determine the prevalence and types of academic challenges among children with sickle cell disease, particularly younger ages. Methods: The Cincinnati Children's Hospital Medical Center's Comprehensive Sickle Cell Clinic includes a school intervention program. This program includes 1-2 full time school teachers who engage directly with patients, parents, and school staff to ensure the provision of adequate school-based services and to address specific challenges or concerns. Children with SCD are referred to the school interventionist by the clinical team (including both medical and psychosocial providers) for any school-related concern. The interventionist completes the Brief School Needs Inventory (BSNI), a thirty-item tool that determines a patient's educational risk based on academic and psychosocial history and parental responses. The BSNI provides a numeric score from 0-20 and a categorical risk of 1 (low risk) to 3 (high risk). In this retrospective review, the BSNI for all patients with SCD completed during the 2018-2019 school year were reviewed. The prevalence of the receipt of special education services (SES), grade retention, neuropsychological testing, and number of school absences were captured. Basic demographic and disease-related data, including zip code, patients' disease history, use of disease-modifying therapy, and any notable brain MRI findings were also recorded. Median household income was extrapolated from the zip codes based on 2017 US Census Bureau reporting (the most recently published year). Results: A total of 78 patients (58 HbSS, 17 HbSC, 3 HbS/β+-thalassemia) completed the BSNI for the 2018-19 academic year; an additional 15 children were also referred but did not complete the evaluation. Nearly all (95%) of patients with HbSS were receiving disease-modifying therapy (hydroxyurea or transfusions); 41% of patients with MRIs showed abnormal findings. Median age was 9 years (range 14 months - 19 years, preschool - post-secondary education). Nineteen percent of patients lived in a zip code with a median household income below the federal poverty level ($25,750). The mean BSNI score was 7.6±5.5; 27 patients were deemed low risk, 32 moderate risk, and 19 high academic risk by the BSNI (Table 1). A majority (50%) of parents responded with concerns both with obtaining support/accommodations for their child and explaining their child's medical needs to the school. Of 59 recorded, 24% of patients had had at least 16 absences in the prior year. Despite the diagnosis of SCD for all patients, only 21% had established 504 medical plans. Academic concerns were common with 20% of referred children reporting an IEP, 14% of patients with a history of grade retention, and an additional 10% with concerns for possible retention. Conclusion: The prevalence of academic difficulties and challenges is high amongst patients with SCD even in the elementary to middle school years, with rates of grade retention ~20% as compared to the national average of <2-6%. Parents of children with SCD report their greatest concerns as obtaining accommodations for their child and explaining their child's medical needs to school personnel. Most parents and schools are inadequately prepared or resourced to identify and address academic and medical needs in the school-based setting, resulting in persistent academic struggles for many children with SCD. A school intervention program is a feasible way to facilitate interaction between parents and schools to optimize educational experiences and outcomes. Disclosures No relevant conflicts of interest to declare.


2014 ◽  
Vol 9 (6) ◽  
pp. 2479-2484 ◽  
Author(s):  
LIANG YUE ◽  
MIN LIN ◽  
JIANG-TAO CHEN ◽  
XIAO-FEN ZHAN ◽  
DE-SHANG ZHONG ◽  
...  

2018 ◽  
Vol 94 (1) ◽  
pp. 39-45 ◽  
Author(s):  
Cindy Steele ◽  
Annette Sinski ◽  
Jacqueline Asibey ◽  
Marie-Dominique Hardy-Dessources ◽  
Gisèle Elana ◽  
...  

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