Department of Pathology, Faculty of Medicine, University of Botswana, Gaborone, Botswana.
School of Allied Health Profession, Faculty of Health Sciences, University of Botswana, Gaborone, Botswana.
BMC Infect Dis. 2024 Oct 15;24(1):1163. doi: 10.1186/s12879-024-10058-z.
BACKGROUND: Cervical cancer remains a public health problem despite heavy global investment in health systems especially in low-and-middle-income countries (LMIC). Prophylactic vaccines against the most commonly detected human papillomavirus (HPV) types in cervical cancers are available and decisions on the selection of vaccine design depends on the prevalence of high-risk (hr) HPV genotypes for a particular region. In 2015, Botswana adopted the use of a quadrivalent HPV vaccine as a primary prevention strategy. Secondary prevention includes cervical smear screening whose uptake remains notably low among indigenous and marginalized communities despite efforts to improve access. AIM: To determine the prevalence of hrHPV genotypes and cervical lesions' burden in women from the indigenous and marginalized communities of Botswana. METHODS: This prospective survey enrolled 171 non-HPV vaccinated women aged 21 years and older. Face-to-face interviews, Pap smear screening, hr-HPV and Human Immuno-deficiency virus (HIV) testing were carried out. Conventional Papanicolau smears were analyzed and cervical brushes were preserved for hrHPV testing using the Ampfire Multiplex HR-HPV protocol which detects the following genotypes: HPV 16, 18, 31, 35, 39, 45, 51, 52, 53, 56, 58, 59 and 68. RESULTS: In this study, 168/171 (98.6%) of the women consented to HIV testing; 53/171 (31%) were living with HIV and self-reported enrolment on antiretroviral therapy. Among the women examined, 23/171 (13.5%) had cervical dysplasia with most presenting with Atypical Squamous Cells of Undetermined Significance 8/23 (35%), Low-Grade Squamous Intraepithelial Lesions 8/23 (35%), Atypical Squamous Cells-High Grade 4/23 (17%), Atypical Endocervical Cells 2/23 (9%) and Atypical Endocervical Cell favoring neoplasia 1/23(4%). However, no High-Grade Squamous Intraepithelial Lesions (HSIL) or squamous cell carcinoma (SCC) were detected. Overall hrHPV prevalence in this study was at 56/171 (32.7%). The most commonly detected hrHPV genotypes in women with cervical dysplasia were HPV39 (6.25%), HPV51 (14.5%), HPV52 (12.5%) and HPV56 (4%). Notably, HPV 16 and 18 were not found in women with cervical dysplasia. CONCLUSIONS: Our study provides valuable insights into the prevalence and distribution of hrHPV genotypes in indigenous and marginalized communities in Botswana, and the need for further investigation of their potential role in cervical carcinogenesis in this population. These results may also serve as baseline data to facilitate future evaluation of the HPV vaccine needs.
背景:尽管全球在卫生系统方面投入巨大,尤其是在中低收入国家(LMIC),但宫颈癌仍然是一个公共卫生问题。针对宫颈癌中最常见的人乳头瘤病毒(HPV)类型的预防性疫苗已经问世,疫苗设计的选择取决于特定地区高危(hr)HPV 基因型的流行情况。2015 年,博茨瓦纳采用了四价 HPV 疫苗作为初级预防策略。二级预防包括宫颈涂片筛查,尽管为改善获取途径做出了努力,但在土著和边缘化社区中,这种筛查的接受率仍然明显较低。
目的:确定博茨瓦纳土著和边缘化社区妇女中高危 HPV 基因型的流行情况和宫颈病变负担。
方法:这项前瞻性调查纳入了 171 名未接种 HPV 疫苗且年龄在 21 岁及以上的女性。进行了面对面访谈、巴氏涂片筛查、高危型 HPV 和人类免疫缺陷病毒(HIV)检测。对传统巴氏涂片进行了分析,并保存了宫颈刷,用于使用 Ampfire Multiplex HR-HPV 方案进行高危型 HPV 检测,该方案可检测以下基因型:HPV 16、18、31、35、39、45、51、52、53、56、58、59 和 68。
结果:在这项研究中,168/171(98.6%)名女性同意接受 HIV 检测;53/171(31%)名女性携带 HIV 并自述正在接受抗逆转录病毒治疗。在接受检查的女性中,23/171(13.5%)患有宫颈上皮内瘤变,其中大多数为非典型鳞状细胞意义不明确 8/23(35%)、低级别鳞状上皮内病变 8/23(35%)、高级别鳞状上皮内瘤变 4/23(17%)、非典型子宫内膜细胞 2/23(9%)和非典型子宫内膜细胞倾向于肿瘤 1/23(4%)。然而,未发现高级别鳞状上皮内病变(HSIL)或鳞状细胞癌(SCC)。本研究中高危型 HPV 的总体流行率为 56/171(32.7%)。在患有宫颈上皮内瘤变的女性中,最常见的高危型 HPV 基因型为 HPV39(6.25%)、HPV51(14.5%)、HPV52(12.5%)和 HPV56(4%)。值得注意的是,HPV16 和 18 未在患有宫颈上皮内瘤变的女性中发现。
结论:我们的研究提供了博茨瓦纳土著和边缘化社区中高危型 HPV 基因型的流行情况和分布的有价值的见解,以及进一步研究它们在该人群中宫颈癌变中的潜在作用的必要性。这些结果也可以作为基线数据,为未来评估 HPV 疫苗需求提供便利。
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