Browsing by Author "Adewumi, M.O."

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    Evaluation of performance testing of different rapid diagnostic kits in comparison with EIAs to validate detection of hepatitis B virus among high risk group in Nigeria
    (Taylor & Francis, 2018-05-15) Afolabi, A. Y.; Bakarey, A. S.; Adewumi, M.O.
    Background: Hepatitis B virus (HBV) causes chronic liver-associated diseases and its early detection is of high public health importance. Its diagnosis is mainly based on immunological assays among which Enzyme-Linked Immunosorbent Assay (ELISA) and rapid tests are the most common and widespread methods. However, a major challenge is the discordance of results of any two laboratory assays which cannot be easily resolved. Therefore, this study was designed to evaluate the validity and reliability of commercially available five rapid test kits in comparison with two Enzyme Immunoassays (EIAs) in Nigeria using hepatitis B surface antigen as a reference marker. Methods: A total of 100 sera of previously diagnosed consenting HBV-positive patients from private diagnostic laboratories in Ibadan between March and August, 2011 were tested using two EIA and five rapid commercially available HBV test kits in Nigeria. Data were analyzed by SPSS version 15, while bivariate and multivariate analyses were carried out to identify associations at P < 0.05 considered significant. Results: Overall, the sensitivity rates of the two EIA kits were 100% and 99.9% (95% confidence interval [CI] = 98.9–99.7) with specificity of 100% and 99.9% (95% CI = 98.9–99.7), respectively. The sensitivity of the five rapid test kits ranged from 97.5% (95% CI = 96.4–97.6) to 98.9% (95% CI = 97.9–99.9) with specificity of 80% (95% CI = 79.3–80.9) to 90% (95% CI = 89.2–91.0). Also, the positive predictive value ranged from 88% (95% CI = 88.2–89.9) to 89% (95% CI = 88.2–89.9), while the negative predictive value ranged from 80% (95% CI = 79.3–80.9) to 90% (95% CI = 89.2–91.0) for the five rapid kits. However, that of the two EIAs ranged from 99.9% (98.9– 99.7) to 100%. Further analysis showed significant (P = 0.033) variations in the sensitivity and specificity of the EIAs and rapid test kits. Conclusions: The results from this study have clearly revealed the challenges of diagnosis of HBV infections in Nigeria. This study has also demonstrated that the sensitivity of most of the rapid test kits may not be adequate when compared with EIA for early detection of HBV infections. The implications of possible misdiagnosis on the various intervention strategies that rely predominantly on correct HBV status of an individual are enormous. Therefore, there is the need to further compliment the use of rapid test kits with EIAs for HBV control in Nigeria.
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    Low and Zero Prevalence Rates of Anti-measles Virus Immunoglobulin G in Mothers and Their Infants Respectively in Health Centers in Osogbo, Nigeria"
    (SCIENCEDOMAIN international, 2014) Adegboye, O. A,; Adegboye, A. A.; Adewumi, M.O.; Sule, W. F.
    We undertook this study to determine the susceptibility of mother-infant pair participants to measles virus infection in two health centers in Osogbo, Osun State, Nigeria. This is a descriptive, cross-sectional hospital-based study. The study was carried out in Osogbo, southwestern, Nigeria between November, 2012 and February, 2013. With ethical approval and participants’ consents, 83 mothers and their 84 infants were consecutively recruited; blood samples were aseptically collected from them by thumb puncture onto Whatman filter paper. The papers were appropriately labeled; air-dried and kept in brown envelopes which we kept in clean polythene bags and stored at 4ºC until assayed. Freshly prepared PBS was used to elute serum from 5 to 6 punched-out disks from each Whatman filter paper. The supernatant from the spun eluate of each sample was assayed for anti-measles virus IgG using ELISA. Overall, 2.41% and zero percent seroprevalence rates were recorded from the nursing mothers and their infants respectively. We concluded that the seropositivity of anti-measles virus IgG antibody in the nursing mothers from the two health facilities was very low, and that all the infants and most (97.59%) of the nursing mothers were apparently susceptible to measles virus infection.