ABSTRACT
ntroduction: Sub-Saharan Africa accounts for 25% of the estimated global 325 million people with chronic hepatitis B and C virus infections. Weak blood transfusion systems facilitate the spread of both hepatitis B and C virus infections. This is worsened by the absence of sustainable quality assurance programs and perennial shortage of sensitive screening kits. We aim to compare the validity of rapid diagnostic tests (RDTs) with the World Health Organization-recommended quality-assured enzyme-linked immunosorbent assay (ELISA) screening method for these viruses. Materials and Methods: We conducted a cross-sectional study on consecutive blood donor samples. Two hundred and sixty-four blood donor samples screened for hepatitis B and C viruses using RDTs were retested at a National blood transfusion service, Kaduna, Nigeria. Data were analyzed using OpenEpi version 3.01 to determine the sensitivity, specificity, and predictive values of RDTs versus ELISA. Results: The sensitivities of the RDTs at 95% confidence interval (CI) were low 40% (19.864.3) and 50.0% (18.881.2) for hepatitis B surface antigen (HBsAg) and hepatitis C virus (HCV) antibody, respectively. The specificities and 95% CI were high 99.9% (97.899.9) and 100.0% (98.5100) for HBsAg and HCV antibody, respectively. Conclusion: Predonation RDTs screening of blood donor samples for hepatitis B virus and HCV in hospital donation units performed poorly compared to quality-assured ELISA screening in Kaduna. The risk of transmitting viral hepatitis through blood transfusion still exists. We recommend quality-assured ELISA screening of all donated units for HBsAg and HCV antibody to reduce the risk of these transfusion-transmitted infections
Subject(s)
Blood Donors , Diagnostic Tests, Routine , NigeriaABSTRACT
Background: Nomadic pastoralists lack access to basic sanitary and health-care facilities mainly because their mode of life makes them a hard to reach group. In the Nigerian context, there is dearth of knowledge about the interplay between their lifestyle and health indices.Therefore, this study is aimed at determining the association between the prevalence of parasitic infestation among nomadic Fulani children in Ladduga grazing reserve, Kaduna, Northwestern Nigeria. Aim: The aim of this study was to assess the prevalence and pattern of parasitic infestation among nomadic Fulani children in Ladduga grazing reserve, Kaduna, Northwestern Nigeria. Materials and Methods: A cross-sectional descriptive study was conducted using questionnaires, physical examination, automated hemocytometry, enzyme-linked immunosorbent assay-based serum ferritin assay, and formol-ether concentration-based stool tests on 337 children (515 years) at Ladduga grazing reserve, Northwestern Nigeria. Data were analyzed using SPSS version 20.0. Results: The prevalence of parasitic infestation was 14.4% (49/337). The predominant parasites found were hookworm species, i.e., Necator americanus and Ancylostoma duodenale (46.9%) and Schistosoma mansoni (26.6%) while Ascaris lumbricoides, Hymenolepis nana, and Enterobius vermicularis accounted for 26.6%. Anemia was found in 40.4% (137/340) of the children with a statistically significant difference between younger (59 years) and older children (1015 years; P < 0.05). Of those with parasites in the stools, 53% of children had anemia. Iron deficiency anemia was found in only 8.1% (4/49) of children. Conclusion: The prevalence of anemia was high in the studied population, but iron deficiency was not a major cause despite hookworm infestation, thus necessitating the need for further studies to identify other causes of anemia among this group
Subject(s)
Child , Nigeria , Parasitic Diseases , Transients and MigrantsABSTRACT
Objective: To perform phytochemical and mineral analyses on leaves, stem and seeds of Telferia occidentalis (T. occidentalis), and examine the inhibition of methemoglobin build-up in sickled erythrocytes. Methods: The phytochemical evaluation was carried out by qualitative and quantitative analyses, whereas mineral elements were quantitatively analyzed. The effect of T. occidentalis on methemoglobin formation in sickled erythrocytes was examined using the ratio of ferric ion (Fe
ABSTRACT
OBJECTIVE@#To perform phytochemical and mineral analyses on leaves, stem and seeds of Telferia occidentalis (T. occidentalis), and examine the inhibition of methemoglobin build-up in sickled erythrocytes.@*METHODS@#The phytochemical evaluation was carried out by qualitative and quantitative analyses, whereas mineral elements were quantitatively analyzed. The effect of T. occidentalis on methemoglobin formation in sickled erythrocytes was examined using the ratio of ferric ion (Fe(2+)) to ferrous ion (Fe(3+)) concentration, as index.@*RESULTS@#The phytochemical evaluation showed the presence of total phenolics, cyanogenic glycosides, flavonoids and alkaloids. Mineral analysis revealed potassium, magnesium, sodium, iron and zinc. Extract concentrations (0.2%-0.8% w/v) of leaves, seeds and stem of T. occidentalis have shown the ability to inhibit the formation of methemoglobin in sickled erythrocytes. The methanolic leaves extract showed the highest effect at 0.8% w/v.@*CONCLUSIONS@#These results suggest that T. occidentalis has the capacity to mop-up methemoglobin in sickled erythrocytes, and may therefore enhance oxygen-hemoglobin binding and transport in sickle cell disease patients.
ABSTRACT
"Background:Human cytomegalovirus; otherwise called human herpes virus type 5; is a significant cause of morbidity and mortality in pregnancy; and among immunocompromised patients like recipients of organ transplants. Cytomegalovirus is transmissible via blood transfusion; among other parenteral routes. This study therefore aims at establishing the seroprevalence of CMV antibodies among prospective blood donors in Jos. This is with a view to making recommendations on donor screening and transfusion protocols among susceptible patients. Methods: A total of 200 prospective blood donors were recruited into the study. Screening for CMV antibodies was done using ELISA kit; manufactured by ""DIALAB""; Austria (www.dialb.at) Results: Of the 200 prospective blood donors analysed; 184 donors were found to be positive for cytomegalovirus antibodies; representing a prevalence rate of 92.The peak age prevalence was in the 25-29 years age range; representing 0.4.Cytomegalovirus prevalence was lowest in the 15-19 years age range and above 50 years(1.6each). Conclusion: A cytomegalovirus antibody prevalence rate of 92indicates that screening for CMV should be included in screening algorithm for potentially susceptible recipients of blood and its products. Non infected susceptible persons should be transfused CMV negative or leucocyte depleted blood and blood products."