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ObjectivesNigeria reported an upsurge in cholera cases in October 2020, which then transitioned into a large, disseminated epidemic for most of 2021. This study aimed to describe the epidemiology, diagnostic performance of rapid diagnostic test (RDT) kits and the factors associated with mortality during the epidemic.DesignA retrospective analysis of national surveillance data.Setting33 of 37 states (including the Federal Capital Territory) in Nigeria.ParticipantsPersons who met cholera case definition (a person of any age with acute watery diarrhoea, with or without vomiting) between October 2020 and October 2021 within the Nigeria Centre for Disease Control surveillance data.Outcome measuresAttack rate (AR; per 100 000 persons), case fatality rate (CFR; %) and accuracy of RDT performance compared with culture using area under the receiver operating characteristic curve (AUROC). Additionally, individual factors associated with cholera deaths and hospitalisation were presented as adjusted OR with 95% CIs.ResultsOverall, 93 598 cholera cases and 3298 deaths (CFR: 3.5%) were reported across 33 of 37 states in Nigeria within the study period. The proportions of cholera cases were higher in men aged 5–14 years and women aged 25–44 years. The overall AR was 46.5 per 100 000 persons. The North-West region recorded the highest AR with 102 per 100 000. Older age, male gender, residency in the North-Central region and severe dehydration significantly increased the odds of cholera deaths. The cholera RDT had excellent diagnostic accuracy (AUROC=0.91; 95% CI 0.87 to 0.96).ConclusionsCholera remains a serious public health threat in Nigeria with a high mortality rate. Thus, we recommend making RDT kits more widely accessible for improved surveillance and prompt case management across the country.

Background As with any epidemic, coronavirus disease 2019 (COVID-19) has evoked panic, fear and misconceptions. The risk communication pillar of the Public Health Emergency Operations Centre is responding to the pandemic by facilitating correct and consistent information to enable the adoption of behaviours to prevent and control COVID-19. This study explored awareness, perception and practice of COVID-19 prevention among residents in Rivers State, Nigeria, during the early stages of the COVID-19 pandemic response. Methods This was a descriptive cross-sectional survey among 1294 adult residents across all districts of the state. It employed an interviewer-administered questionnaire. Knowledge was graded as excellent for scores of ≥80%, good for scores of 50–79% and poor for scores of Results The respondents were aged 18–80 y with an average age of 39.6 (SD=11.9) y. A total of 710 (54.9%) were male, 476 (36.8%) were unemployed with 685 (52.9%) having secondary education. The most common sources of information about COVID-19 were radio jingles (1102; 86.7%) and television adverts (940; 74.0%). Overall, 608 (47.0%) of the respondents had a poor knowledge of COVID-19. About 443 (34.9%) respondents believed they were unlikely to contract the virus. Only 505 (39.0%) of respondents washed all the critical parts of their hands correctly. Occupation (adjusted OR [AOR]=1.39, 95% CI 1.07 to 1.82, p=0.01), level of education (AOR=4.71, 95% CI 1.90 to 11.68, p Conclusions Broadcast media has a pivotal role to play in risk communication for behavioural change for the control of current and future epidemics in this population.

ObjectiveDespite the increasing disease burden, there is a dearth of context-specific evidence on the risk factors for COVID-19 positivity and subsequent death in Nigeria. Thus, the study objective was to identify context-specific factors associated with testing positive for COVID-19 and fatality in Nigeria.DesignRetrospective cohort study.SettingCOVID-19 surveillance and laboratory centres in 36 states and the Federal Capital Territory reporting data to the Nigeria Centre for Disease Control.ParticipantsIndividuals who were investigated for SARS-CoV-2 using real-time PCR testing during the study period 27 February–8 June 2020.MethodsCOVID-19 positivity and subsequent mortality. Multivariable logistic regression analyses were performed to identify factors independently associated with both outcome variables, and findings are presented as adjusted ORs (aORs) and 95% CIs.ResultsA total of 36 496 patients were tested for COVID-19, with 10 517 confirmed cases. Of 3215 confirmed cases with available clinical outcomes, 295 died. Factors independently associated with COVID-19 positivity were older age (p value for trendConclusionThe significant risk factors associated with COVID-19 positivity and subsequent mortality in the Nigerian population are similar to those reported in studies from other countries and should guide clinical decisions for COVID-19 testing and specialist care referrals.

Introduction:the knowledge of epidemiologic and clinical variables in patients with SARS- CoV-2 infection provides evidence and lessons that are useful for the pandemic response, with consideration of National and sub-National variations. The objective of this study was to characterize and describe the clinical and epidemiologic features of all the hospitalised patients with COVID-19 in Rivers State Nigeria, from March to August 2020. Methods:a prospective descriptive multi-center study of patients with positive SARS-CoV-2 RT PCR, who were hospitalised for treatment and self-isolation in four treatment centers in Rivers state, Nigeria. Results:the mean age of all the patients was 39.21 ± 12.31 years, with a range of 2 to 77 years. The majority of patients were in the 31 to 40-year (33.0%), 41 to 50-year (23.1%) and 18-to 30-year (22.0%) age groups. The patient population included 474 (73.4%) males and 172 (26.6%) females, with 93 (14.4%) healthcare workers. A history of contact and travel was established in 38.5% and at least one comorbid disease condition was present in 32.8% of patients. Patients with severe disease were 61 (9.45%), while the overall case fatality rate was 2%. The leading comorbid disease conditions were Hypertension in 23.8% and diabetes in 7.7% of patients. Fever (26.0%), dry Cough (17.6%), dyspnoea (12.7%), anosmia (12.7%) and headache (9.9%) were the most common symptoms. The presence of comorbidity and increasing age predicted death from COVID-19. Conclusion:the clinical and epidemiologic characteristics of this cohort of hospitalised patients show significant similarities with existing trends from previously reported studies, with contextual peculiarities.

The methanol poisoning outbreak in Rivers State, Nigeria in May 2015, involved 84 persons in five local government areas. An incident management system comprised of an Emergency Preparedness and Response (EPR) committee and the Local Government Area Rapid Response Teams in an Emergency Operations Centre (EOC). The EOC teams conducted case finding activities, line listing, and descriptive analysis, a retrospective cohort study and collection of local gin samples for laboratory investigation. They also coordinated community mobilization and sensitization activities, intervention meetings with local gin sellers, trace back activities and case management. Those affected were male (72; 85.7%) aged between 20 and 79 years. Of the 55 persons whose socio-demographics were obtained, forty-one persons (74.6%) were married, and 23 (41.8%) had primary education. Case fatality rate was 83.3% with an attack rate of 16 per 100,000 persons. Those exposed to ingestion of adulterated gin were six times more likely to develop methanol poisoning than those not exposed RR=6 (1.0-38.5); P=0.0078. It is hoped that this experience has positioned the state for better preparedness towards future outbreaks.