The human major histocompatibility complex (MHC) class I chain-related gene A (MICA), located 46 kb centromeric to HLA-B, encodes a stress-inducible protein, which is a ligand for the NKG2D receptor. In addition to its primary role in immune surveillance, data suggest that MICA is involved in the immune response to transplants and in susceptibility to some diseases. In this study, 152 subjects from the Yoruba (n¼74), Efik (n¼32), and Igbo (n¼46) tribes of southern Nigeria, 39 nationwide African-American stem cell donors, and 60 African-American individuals residing in the metropolitan Boston area were studied for MICA, HLA-B allelic variation, haplotypic diversity, and linkage disequilibrium (LD). MICA and HLA-B exhibited a high degree of genetic diversity among the populations studied. In particular, MICA allele and HLA-B-MICA haplotype frequencies and LD in the Efik and Igbo tribes were significantly different from the other study groups. HLA-B and MICA loci demonstrated significant global LD in all five populations (P-values o0.00001). LD also varied in a haplotype-specific manner. A novel MICA allele was detected in the Boston population. These findings are important from an anthropologic perspective, and will inform future HLA-linked disease association studies in related ethnic groups of African-derived ancestry.
Background. Hepatitis B virus (HBV), hepatitis C virus (HCV) and HIV are common blood-borne infections unevenly distributed across regions in Nigeria. Few population-based prevalence studies have been done in Nigeria. Objective. To determine the prevalence of HBV, HCV and HIV and risk factors for infection with these viruses in a Nigerian population. Methods. Hepatitis B surface antigen, anti-HCV and HIV were assayed in 1 498 healthy adult participants. A structured questionnaire was used to assess risk factors for viral acquisition. Bivariate analysis was used to compare differences in sociodemographic characteristics. Significant risk factors were identified by stepwise logistic regression. A p-value <0.05 was considered significant. Results. The prevalences of HBV, HCV and HIV were 8.8%, 10.0% and 12.9%, respectively, with urban/rural disparity. HBV/HCV positivity was higher among males than females. The reverse was true for HIV. Age was significantly associated with being HBV-, HCV-or HIVpositive. Communal use of a toothbrush was significantly associated with HBV positivity in the final model (odds ratio 2.46, 95% confidence interval 1.45 -4.18). Conclusions. The prevalence of HBV, HCV and HIV infection is high in Nigeria, with urban/rural disparity. HCV may be more of a public health concern than HBV in some communities. Population-based studies are required to provide vital data to inform optimal national control strategies.
Necrotizing fasciitis of the head and neck is a rare and potentially fatal disease. It is a bacterial infection characterized by spreading along fascia planes and subcutaneous tissue resulting in tissue necrosis and likely death. It is commonly of dental or pharyngeal origin. Factors affecting the success of the treatment are early diagnosis, appropriate antibiotics and surgical debridement. Our study showed eight patients, five males and three females with mean age of 49.25 years (range 20-71 years). Clinical presentations were a rapidly progressing painful neck swelling, fever, dysphagia and trismus. The aetiology varied from idiopathic, pharyngeal/tonsillar infection, trauma and nasal malignancy. There were associated variable comorbidities (diabetes mellitus, HIV infection, hypertension and congestive cardiac failure). All the patients received early and aggressive medical treatment. The earliest time of surgery was 12 h after admission because of the poor financial status of patients. Three cases came in with complications of the disease and were not fit for extensive debridement under general anaesthesia. For them limited and reasonable bed side debridement was done. Mortality was 50 % from multiple organ failure, HIV encephalopathy, aspiration pneumonitis and septicemia. The duration of hospital stay for the patients that died ranged from 1 to 16 days and 4 to 34 days for the survivor. Our study heightens awareness and outlines the management challenges of necrotizing fasciitis of the head and neck in a poor resource setting.
Aims:This study aims to find out the prevalence of cancer in the different age groups in the rest of Cross River state not covered by the Calabar cancer registry. Study Design: Descriptive retrospective study involving a trend analysis of the cancers incident in the University of Calabar Teaching Hospital, and persons from the rest of Cross River State not covered by the Calabar cancer registry. Such cases as occurred between 1st of January 2004 to December 31st, 2013 were included. Place and Duration of Study: The Department of Pathology, University of Calabar Teaching hospital; between April and May 2019. Methodology: A trend analysis of cancer cases from the rest of Cross River State outside the range of the Calabar cancer registry over the period was studied. Results: Nine hundred and forty-one (941) cases of cancer were seen outside Calabar in Cross River State, within January 2004 and December 2013. Mean age was 49.18 ± 18.9 years, ranging Original Research Article Ebughe et al.; IJTDH, 38(1): 1-12, 2019; Article no.IJTDH.50415 2 from 1 to 100 years, and female: male ratio was 1: 0.97. The commonest age range cancer occurred is 40 to 64 years overall, 40 to 64 years in males and 40 to 64 years in females. The commonest cancers sites were breast cancer (21.9%), prostate (21.3%), lymphohematopoietic (9.2%). The commonest cancers in males were prostate (43.1), lymphohematopoietic (12.9%), soft tissue (11.4%). In females' breast 41.1% and cervix, 15.9% were the dominant sites. Cancer in the 0 to 17 age range was remarkably similar and was dominated by lymphohematopoietic sites, soft tissue, eye and urinary system. Cancer in the older ages 65 years and above is overwhelmingly dominated by prostate 60% followed by breast 18%. Conclusion: Cancer in the rest of Cross River State is dominated by breast, prostate and cervical sites. This is like the GLOBOCAN estimates for Nigeria.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.