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Kriss JL, De Wee RJ, Lam E, Kaiser R, Shibeshi ME, Ndevaetela EE, Muroua C, Shapumba N, Masresha BG, Goodson JL. Development of the World Health Organization Measles Programmatic Risk Assessment Tool Using Experience from the 2009 Measles Outbreak in Namibia. Risk Anal 2017; 37:1072-1081. [PMID: 26895314 DOI: 10.1111/risa.12544] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In the World Health Organization (WHO) African region, reported measles cases decreased by 80% and measles mortality declined by 88% during 2000-2012. Based on current performance trends, however, focused efforts will be needed to achieve the regional measles elimination goal. To prioritize efforts to strengthen implementation of elimination strategies, the Centers for Disease Control and Prevention and WHO developed a measles programmatic risk assessment tool to identify high-risk districts and guide and strengthen program activities at the subnational level. This article provides a description of pilot testing of the tool in Namibia using comparisons of high-risk districts identified using 2006-2008 data with reported measles cases and incidence during the 2009 outbreak. Of the 34 health districts in Namibia, 11 (32%) were classified as high risk or very high risk, including the district of Engela where the outbreak began in 2009. The district of Windhoek, including the capital city of Windhoek, had the highest overall risk score-driven primarily by poor population immunity and immunization program performance-and one of the highest incidences during the outbreak. Other high-risk districts were either around the capital district or in the northern part of the country near the border with Angola. Districts categorized as high or very high risk based on the 2006-2008 data generally experienced high measles incidence during the large outbreak in 2009, as did several medium- or low-risk districts. The tool can be used to guide measles elimination strategies and to identify programmatic areas that require strengthening.
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Affiliation(s)
- Jennifer L Kriss
- Centers for Disease Control and Prevention (CDC), Center for Global Health, Global Immunization Division, Atlanta, GA, USA
| | - Roselina J De Wee
- World Health Organization (WHO), Office of the WHO Representative in Namibia, Windhoek, Namibia
| | - Eugene Lam
- Centers for Disease Control and Prevention (CDC), Center for Global Health, Global Immunization Division, Atlanta, GA, USA
| | - Reinhard Kaiser
- WHO, Regional Office for Africa, InterCountry Support Team (IST) East and Southern Africa, Harare, Zimbabwe
| | - Messeret E Shibeshi
- WHO, Regional Office for Africa, InterCountry Support Team (IST) East and Southern Africa, Harare, Zimbabwe
| | | | | | | | | | - James L Goodson
- Centers for Disease Control and Prevention (CDC), Center for Global Health, Global Immunization Division, Atlanta, GA, USA
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Jonas A, Cardemil CV, Beukes A, Anderson R, Rota PA, Bankamp B, Gary HE, Sawadogo S, Patel SV, Zeko S, Muroua C, Gaeb E, Wannemuehler K, Gerber S, Goodson JL. Rubella immunity among pregnant women aged 15–44 years, Namibia, 2010. Int J Infect Dis 2016; 49:196-201. [DOI: 10.1016/j.ijid.2016.05.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Revised: 04/04/2016] [Accepted: 05/11/2016] [Indexed: 11/25/2022] Open
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Cardemil CV, Jonas A, Beukes A, Anderson R, Rota PA, Bankamp B, Gary HE, Sawadogo S, Patel SV, Zeko S, Muroua C, Gaeb E, Wannemuehler K, Gerber S, Goodson JL. Measles immunity among pregnant women aged 15-44 years in Namibia, 2008 and 2010. Int J Infect Dis 2016; 49:189-95. [PMID: 27235084 PMCID: PMC6996213 DOI: 10.1016/j.ijid.2016.05.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Revised: 05/16/2016] [Accepted: 05/18/2016] [Indexed: 11/12/2022] Open
Abstract
Background: Namibia experienced a large measles outbreak starting in 2009, with 38% of reported cases in adults, including women of reproductive age. Population immunity was assessed among pregnant women to determine whether immunization activities were needed in adults to achieve measles elimination in Namibia. Methods: A total of 1708 and 2040 specimens sampled from Namibian pregnant women aged 15–44 years who were included in the 2008 and 2010 National HIV Sentinel Survey, respectively, were tested for measles immunoglobulin G antibody. The proportion of women seropositive overall and by 5-year age strata was determined, and factors associated with seropositivity were analyzed by logistic regression, including age, facility type, gravidity, HIV status, and urban/rural setting. Seropositivity in 2008 versus 2010 was compared. Results: In both analysis years, measles seropositivity was lower in 15–19-year-olds (77%) and 20–24-year-olds (85–87%) and higher in 25–44-year-olds (90–94%) (2008, p < 0.001; 2010, p < 0.001). Overall measles seropositivity did not differ between 2008 (87%) and 2010 (87%) (p = 0.7). HIV status did not affect seropositivity. Conclusions: Late in a large measles outbreak, 13% of pregnant women in Namibia, and almost one in four 15–19-year-old pregnant women, remained susceptible to measles. In Namibia, immunization campaigns with measles-containing vaccine should be considered for adults.
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Affiliation(s)
- Cristina V Cardemil
- Centers for Disease Control and Prevention, Global Immunization Division, 1600 Clifton Road, NE, Atlanta, GA 30333, USA.
| | - Anna Jonas
- Ministry of Health and Social Services, Directorate of Special Programmes, Primary Health Directorate, and Family Health Division (Expanded Programme on Immunizations), Windhoek, Namibia
| | - Anita Beukes
- Centers for Disease Control and Prevention, Windhoek, Namibia
| | - Raydel Anderson
- Centers for Disease Control and Prevention, Division of Viral Diseases, Atlanta, GA, USA
| | - Paul A Rota
- Centers for Disease Control and Prevention, Division of Viral Diseases, Atlanta, GA, USA
| | - Bettina Bankamp
- Centers for Disease Control and Prevention, Division of Viral Diseases, Atlanta, GA, USA
| | - Howard E Gary
- Ministry of Health and Social Services, Directorate of Special Programmes, Primary Health Directorate, and Family Health Division (Expanded Programme on Immunizations), Windhoek, Namibia
| | | | - Sadhna V Patel
- Centers for Disease Control and Prevention, Windhoek, Namibia
| | - Sikota Zeko
- Ministry of Health and Social Services, Directorate of Special Programmes, Primary Health Directorate, and Family Health Division (Expanded Programme on Immunizations), Windhoek, Namibia
| | - Clementine Muroua
- Ministry of Health and Social Services, Directorate of Special Programmes, Primary Health Directorate, and Family Health Division (Expanded Programme on Immunizations), Windhoek, Namibia
| | - Esegiel Gaeb
- Namibia Institute of Pathology, Windhoek, Namibia
| | - Kathleen Wannemuehler
- Centers for Disease Control and Prevention, Global Immunization Division, 1600 Clifton Road, NE, Atlanta, GA 30333, USA
| | - Sue Gerber
- Centers for Disease Control and Prevention, Windhoek, Namibia
| | - James L Goodson
- Centers for Disease Control and Prevention, Global Immunization Division, 1600 Clifton Road, NE, Atlanta, GA 30333, USA
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Cardemil CV, Jonas A, Gerber S, Weldon WC, Oberste MS, Beukes A, Sawadogo S, Patel SV, Zeko S, Muroua C, Gaeb E, Wannemuehler K, Goodson JL. Poliovirus immunity among pregnant females aged 15-44 years, Namibia, 2010. J Infect Dis 2014; 210 Suppl 1:S136-42. [PMID: 25316828 DOI: 10.1093/infdis/jiu086] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Poliovirus (PV) antibody seroprevalence studies assess population immunity, verify an immunization program's performance and vaccine efficacy, and guide polio eradication strategy. Namibia experienced a polio outbreak among adults in 2006, yet population seroimmunity was unknown. METHODS We tested 2061 specimens from Namibian pregnant females aged 15-44 years for neutralizing antibody to PV types 1-3 (PV1-3); all females were sampled during the 2010 National HIV Sentinel Survey. We determined the proportion of females seropositive for PV antibody by 5-year age strata, and analyzed factors associated with seropositivity, including age, gravidity, human immunodeficiency virus (HIV) infection status, residence, and antiretroviral treatment, by log-binomial regression. RESULTS The seroprevalence was 94.6% for PV1, 97.0% for PV2, and 85.1% for PV3. HIV-positive females had significantly lower seroprevalence than HIV-negative females for PV1 (91.8% vs 95.3%; P<.01) and PV3 (80.0% vs 86.1%; P<.01) but not for PV2 (96.4% vs 97.1%; P=.3). The prevalence ratio of seropositivity for HIV-positive females versus HIV-negative females was 0.95 (95% confidence interval [CI], .92-.98) for PV1, 0.99 (95% CI, .97-1.01) for PV2, and 0.92 (95% CI, .87-.96) for PV3. CONCLUSIONS Despite relatively high PV seroprevalence, Namibia might remain at risk for a PV outbreak, particularly in lower-seroprevalence populations, such as HIV-positive females. Namibia should continue to maintain high routine polio vaccination coverage.
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Affiliation(s)
- Cristina V Cardemil
- Centers for Disease Control and Prevention, Global Immunization Division, United States
| | - Anna Jonas
- Ministry of Health and Social Services, Namibia
| | - Sue Gerber
- Centers for Disease Control and Prevention, Division of Global HIV/AIDS, Namibia
| | - William C Weldon
- Centers for Disease Control and Prevention, Division of Viral Diseases, United States
| | - M Steven Oberste
- Centers for Disease Control and Prevention, Division of Viral Diseases, United States
| | - Anita Beukes
- Centers for Disease Control and Prevention, Division of Global HIV/AIDS, Namibia
| | - Souleymane Sawadogo
- Centers for Disease Control and Prevention, Division of Global HIV/AIDS, Namibia
| | - Sadhna V Patel
- Centers for Disease Control and Prevention, Division of Global HIV/AIDS, Namibia
| | - Sikota Zeko
- Ministry of Health and Social Services, Namibia
| | | | | | - Kathleen Wannemuehler
- Centers for Disease Control and Prevention, Global Immunization Division, United States
| | - James L Goodson
- Centers for Disease Control and Prevention, Global Immunization Division, United States
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Ogbuanu IU, Zeko S, Chu SY, Muroua C, Gerber S, De Wee R, Kretsinger K, Wannemuehler K, Gerndt K, Allies M, Sandhu HS, Goodson JL. Maternal, fetal, and neonatal outcomes associated with measles during pregnancy: Namibia, 2009-2010. Clin Infect Dis 2014; 58:1086-92. [PMID: 24457343 PMCID: PMC10613509 DOI: 10.1093/cid/ciu037] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2023] Open
Abstract
BACKGROUND Previous studies of maternal, fetal, and neonatal complications of measles during pregnancy suggest the possibility of increased risk for morbidity and mortality. In 2009-2011, a nationwide laboratory-confirmed measles outbreak occurred in Namibia, with 38% of reported cases among adults. This outbreak provided an opportunity to describe clinical features of measles in pregnant women and assess the relative risk for adverse maternal, fetal, and neonatal outcomes. METHODS A cohort of pregnant women with clinical measles was identified retrospectively from 6 district hospitals and clinics over a 12-month period. Each pregnant woman with measles was matched with 3 pregnant women without measles, randomly selected from antenatal clinic registers at the same hospital during the same time interval. We reviewed hospital and clinic records and conducted in-person interviews to collect demographic and clinical information on the pregnant women and their infants. RESULTS Of 55 pregnant women with measles, 53 (96%) were hospitalized; measles-related complications included diarrhea (60%), pneumonia (40%), and encephalitis (5%). Among pregnant women with known human immunodeficiency virus (HIV) status, 15% of those without measles and 19% of those with measles were HIV positive. Of 42 measles-related pregnancies with known outcomes, 25 (60%) had ≥1 adverse maternal, fetal, or neonatal outcome and 5 women (12%) died. Compared with 172 pregnancies without measles, after adjusting for age, pregnancies with measles carried significantly increased risks for neonatal low birth weight (adjusted relative risk [aRR] = 3.5; 95% confidence interval [CI], 1.5-8.2), spontaneous abortion (aRR = 5.9; 95% CI, 1.8-19.7), intrauterine fetal death (aRR = 9.0; 95% CI, 1.2-65.5), and maternal death (aRR = 9.6; 95% CI, 1.3-70.0). CONCLUSIONS Our findings suggest that measles virus infection during pregnancy confers a high risk of adverse maternal, fetal, and neonatal outcomes, including maternal death. Maximizing measles immunity among women of childbearing age would decrease the incidence of gestational measles and the attendant maternal, fetal, and neonatal morbidity and mortality.
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Affiliation(s)
- Ikechukwu U. Ogbuanu
- Global Immunization Division, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Sikota Zeko
- Ministry of Health and Social Services of Namibia
| | - Susan Y. Chu
- Global Immunization Division, Centers for Disease Control and Prevention, Atlanta, Georgia
| | | | - Sue Gerber
- Division of Global HIV/AIDS, US Centers for Disease Control and Prevention–Namibia
| | | | - Katrina Kretsinger
- Global Immunization Division, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Kathleen Wannemuehler
- Global Immunization Division, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Krysta Gerndt
- Division of Global HIV/AIDS, US Centers for Disease Control and Prevention–Namibia
- Association of Schools and Programs of Public Health, Washington, District of Columbia
| | | | - Hardeep S. Sandhu
- Global Immunization Division, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - James L. Goodson
- Global Immunization Division, Centers for Disease Control and Prevention, Atlanta, Georgia
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