ABSTRACT
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 ß-thalassemia (2.7%) traits may also cause composite heterogeneous sickle cell disease, e.g., SC or S/ß-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.
ABSTRACT
INTRODUCTION: To promote the early diagnosis of pediatric cancers in Ivory Coast, we have initiated a program to train local physicians in the warning signs and to raise public awareness. The aim of this work was to compare the times, stages and survival of patients before and three years after the initiation of the program. METHODS: This retrospective study involved children 0-17 years of age admitted from January to December 2014 and from May 2018 to April 2019. The Mann-Whitney non-parametric test and the Fisher's exact test were used to compare time limits, stages and survival. RESULTS: One hundred and fifty-nine doctors were trained and 1020 people were sensitized. The median age of the 216 children included was 7 years, sex ratio 1.4. For both periods, the median consultation times were 75 and 30 days (P=0.003) and the median diagnostic times were 120 and 105 days (P=0.033). High-risk lymphomas accounted for 60.5% and 58.5% (P=0.99) respectively and nephroblastoma 46.1% and 56.2% (P=0.51). The overall survival was 31% and 30.2% (P=0.92). DISCUSSION: The early diagnosis program had no impact. The diagnosis times and the proportion of cancer classified as high risk are comparable to the data reported in sub-Saharan Africa, which vary respectively from 7 to 15.8 weeks and from 60 to 71%. This program must be intensified, extended to all health workers and include improving access to care.
