Please use this identifier to cite or link to this item: http://repository.unizik.edu.ng/handle/123456789/313
Full metadata record
DC FieldValueLanguage
dc.contributor.authorEsimone, Charles Okechukwu-
dc.contributor.authorOli, Angus Nnamdi-
dc.contributor.authorAgu, Remigius Uchenna-
dc.contributor.authorIhekwereme, Chibueze Peter-
dc.date.accessioned2022-11-18T17:21:39Z-
dc.date.available2022-11-18T17:21:39Z-
dc.date.issued2017-06-23-
dc.identifier.citationThe Pan African Medical Journal. 2017;27 (Supp 3):28en_US
dc.identifier.uriDOI: 10.11604/pamj.supp.2017.27.3.11491-
dc.identifier.urihttp://repository.unizik.edu.ng/handle/123456789/313-
dc.description.abstractIntroduction: vaccines are biological products and their efficacy is affected by storage conditions. They are vital in promoting public health. Failures in immunization programmes often times are blamed on disruption in vaccine cold-chain. This study assessed the immunogenicity/potency of the measles vaccines utilized in childhood immunization in South-East, Nigeria and indirectly assessed the effectiveness of the cold-chain technology in the region. Methods: this was an experimental study carried out between December 2011 and June 2013. Antibody induction method was used to evaluate the immunogenicity/potency of the measles vaccines sourced from the central cold chain facilities in South-east, Nigeria and indirectly, the effectiveness of the cold chain technology in the zone in maintaining vaccine potency. The neutralizing antibodies in a control group (administered with measles vaccines stored at 37°C for 12 months) and in immunized group were determined after 30 days of immunization using ELISA. Results: the mean storage temperature of the vaccines at the states vaccines central cold chain facilities was -2.4°C and before storage at study site, it was 5.8°C but at the study site it was -4.54°C. Mean ±Standard Error in the Mean (SEM) IgG titers for the measles vaccines sourced from "Open Market", Ebonyi, Enugu, Imo, Anambra and Abia States were 0.793±0.051, 1.621±0.015, 1.621±0.015, 1.715±0.081, 1.793±0.051 and 1.683±0.078 respectively while the mean ±Standard Error in the Mean (SEM) IgM titres were 0.857±0.037, 1.400±0.030, 1.391±0.032, 1.339±0.037, 1.405±0.066 and 1.279±0.025 respectively. One way analysis of variance shows that there is statistical difference in the IgG and IgM antibodies titers produced by the control compared to the vaccines (P value < 0.0001). Also, Bartlett's test for equal variances showed that there was statistical difference (P value < 0.0001 for IgG and = 0.036 for IgM). The antibodies elicited by the vaccines from the states were enough to confer protection but the vaccine samples from "OpenMarket" (control) could not evoke enough antibodies. Conclusion: the cold-chain technology in the region was judged to be optimal as at the time of vaccine sampling since all the measles vaccines had good immunogenicity profile. However, efforts are still needed to maintain these facilities in good condition in order to ensure effective immunization program in the region.en_US
dc.language.isoenen_US
dc.publisherThe Pan African Medical Journalen_US
dc.subjectbiological productsen_US
dc.subjectimmunizationen_US
dc.subjectimmunogenicityen_US
dc.subjectSouth-easten_US
dc.subjectchain technologyen_US
dc.subjectNigeriaen_US
dc.titleAn evaluation of the cold chain technology in South-East, Nigeria using Immunogenicity study on the measles vaccinesen_US
dc.typeArticleen_US
Appears in Collections:Scholarly Works

Files in This Item:
File Description SizeFormat 
PAMJ-SUPP-27-3-28.pdfFull Text449.14 kBAdobe PDFView/Open


Items in UnizikSpace are protected by copyright, with all rights reserved, unless otherwise indicated.