Prevalence of high-risk human papillomavirus genotypes among apparently healthy women with normal and abnormal cervical cytology in Kaduna State, Nigeria

Background: About 99.7% of cervical dysplasia and cancer cases are caused by persistent genital high-risk human papillomavirus (hrHPV) infection. Most HPV infections are subclinical and self-limiting but may persists in about 5 to 10% of infected women, resulting in pre-cancerous lesions that can progress to invasive cancer years later. This study is aimed at detecting hrHPV among apparently healthy women of reproductive age in Kaduna State, thus providing more information for effective control of HPV and cervical cancer in Nigeria. Methodology: Cervical smears were taken from 515 randomly selected apparently healthy women across selected secondary and tertiary facilities from 3 Local Government Areas (LGAs) in each Senatorial Zone of Kaduna State, Nigeria. Liquid-based cytology (LBC) technique was used to collect cervical smears and prepare smears for cytology study, while the remaining samples were stored at -80oC for molecular studies. HPV DNA were extracted from the samples and amplified by convectional PCR using specific hrHPV (HPV 16,18,31 and 45) primer sets and a broad spectrum MY09/11 and GP5+/6+ primers for a wider range of HPV genotypes. Data were analysed using the Statistical Package for Social Sciences (SPSS) version 23.0 and relationship between prevalence of hrHPV and socio-demographic factors such as age and marital status were determined using Chisquare or Fisher Exact test with p<0.05 considered statistically significant. Results: The prevalence of total HPV and hrHPV infections in the study population was 11.8% (61/515) and 9.3% (48/515) respectively. A total of 100 HPV genotypes were detected by PCR in the 61 positive smears, with 66 hrHPV types from 48 women, and 34 other HPV types from 13 women. The frequency of hrHPV genotypes detected was HPV 31 (5.8%, n=30), HPV 45 (4.1%, n=21), HPV 16 (1.7%, n=9), and HPV 18 (1.2%, n=6), with other HPV genotypes (6.6%, n=34). The frequency of cervical dysplasia was 6.4% (33/515), which was significantly associated with all HPV genotypes except HPV 16. Single HPV infection was seen in 31 (51.8%) women while multiple infections were seen in 30 (49.2%), with double infection in 21 (34.4%) and triple infections in 9 (14.7%). Conclusion: The prevalence of hrHPV infection was high among women in Kaduna State, Nigeria. DNA-based screening for hrHPV genotypes and production of new vaccine that will protect against the predominant hrHPV genotypes are thus recommended for the prevention of cervical cancer in Nigeria, Africa and beyond.

Maternal near-miss and death among women with hypertensive disorders in pregnancy: a secondary analysis of the Nigeria Near-miss and Maternal Death Survey.

OBJECTIVE: To investigate life-threatening maternal complications related to hypertensive disorders of pregnancy (HDP) in Nigerian public tertiary hospitals. DESIGN: Secondary analysis of a nationwide cross-sectional study. SETTING: Forty-two tertiary hospitals. POPULATION: Women admitted for pregnancy, childbirth or puerperal complications. METHOD: All cases of severe maternal outcome (SMO: maternal near-miss or maternal death) due to HDP were prospectively identified using the WHO criteria over a 1-year period. MAIN OUTCOME MEASURES: Incidence of SMO, health service events, case fatality rate, and mortality index (% of maternal death/SMO). RESULTS: Out of 100 107 admissions for maternal complications, 6753 (6.8%) women had HDP. Pre-eclampsia (PE) (54.5%) and eclampsia (E) (30.4%) were the most common HDP recorded. SMO occurred in 587 women with HDP: 298 maternal near-misses and 289 maternal deaths. The majority (93%) of the women with SMO due to HDP were admitted in a critical condition. The median diagnosis-definitive intervention interval was over 4 hours in a quarter of women who died from HDP. For PE and E, case fatality rates were 1.9 and 10.4%, respectively, although both conditions had a similar mortality index of 49.3%. Lack of antenatal care and place of residence further than 5 km from the hospital were associated with maternal death. CONCLUSIONS: Severe maternal outcomes from HDP were due to late presentations and health system challenges. To reduce maternal deaths from HDP, health system strengthening that would engender early hospital presentation and prompt treatment is recommended. FUNDING: The original research that generated the data for this secondary analysis was funded by the UNDP/UNFPA/UNICEF/WHO/World Bank Special Programme of Research, Development and Research Training in Human Reproduction (HRP), a co-sponsored programme executed by the World Health Organization (WHO). We have no other funding issue to declare for our study. TWEETABLE ABSTRACT: Eclampsia is the leading cause of maternal death in Nigerian hospitals.

Malaria at parturition in Nigeria: current status and delivery outcome.

BACKGROUND: To evaluate the current status of malaria at parturition and its impact on delivery outcome in Nigeria. METHODS: A total of 2500 mother-neonate pairs were enrolled at 4 sites over a 12-month period. Maternal and placental blood smears for malaria parasitaemia and haematocrit were determined. RESULTS: Of the 2500 subjects enrolled, 625 were excluded from analysis because of breach in study protocol. The mean age of the remaining 1875 mothers was 29.0 +/- 5.1 years. The prevalence of parasitaemia was 17% and 14% in the peripheral blood and placenta of the parturient women, respectively. Peripheral blood parasitaemia was negatively associated with increasing parity (P < .0001). Maternal age <20 years was significantly associated with both peripheral blood and placental parasitaemia. After adjusting for covariates only age <20 years was associated with placental parasitaemia. Peripheral blood parasitaemia in the women was associated with anaemia (PCV < or =30%) lower mean hematocrit (P < .0001). lower mean birth weight (P < .001) and a higher proportion of low birth weight babies (LBW), (P = .025). CONCLUSION: In Nigeria, maternal age < 20 years was the most important predisposing factor to malaria at parturition. The main impacts on pregnancy outcome were a twofold increase in rate of maternal anaemia and higher prevalence of LBW.