Natalie. V.S. Vinkeles Melchers , Cristovão Manjuba , Yao Sodahlon , Ramalho João Correia , Victorino Martinho Aiogalé , Léonce Aké Assi , Francisco Cabral , Paul T. Cantey , Wilma A. Stolk
{"title":"几内亚比绍盘尾丝虫病状况:流行病学和昆虫学指标趋势概述。","authors":"Natalie. V.S. Vinkeles Melchers , Cristovão Manjuba , Yao Sodahlon , Ramalho João Correia , Victorino Martinho Aiogalé , Léonce Aké Assi , Francisco Cabral , Paul T. Cantey , Wilma A. Stolk","doi":"10.1016/j.ijid.2025.108035","DOIUrl":null,"url":null,"abstract":"<div><h3>Objectives</h3><div>The World Health Organization recommends monitoring infection and entomological indicators to evaluate onchocerciasis elimination. We reviewed trends in Guinea-Bissau since the onset of interventions to assess current progress toward elimination.</div></div><div><h3>Methods</h3><div>We collated programmatic, entomological, and epidemiological data from Guinea-Bissau, including Onchocerciasis Control Programme (OCP) records, impact data, and community-directed treatment with ivermectin (CDTi) data. Trends were visualized to assess impact.</div></div><div><h3>Results</h3><div>Pre-control microfiladermia (mf) prevalences reached up to 70.6% along Rio Corubal and 27.4% along Rio Géba. Mf intensity ranged up to 59.9 and 6.5 mf/skin snip, respectively. Mf prevalence and intensity declined over time, despite irregular CDTi. In 2007-2008, the highest mf prevalence was 9.7% (Rio Corubal). Despite all villages being mf skin snip-negative by 2015, the detection of OV16 ELISA-positives (0.7%-14.9%) indicated ongoing transmission. Entomological surveys (2015) reported a blackfly infectivity rate of 0.06%, with infectious flies found at two of five sites (Gabú region).</div></div><div><h3>Conclusions</h3><div>CDTi substantially reduced mf prevalence, intensity, and vector infectivity in Guinea-Bissau, but transmission was not reduced to zero. Renewed serological and entomological assessments are needed to accurately determine elimination progress.</div></div>","PeriodicalId":14006,"journal":{"name":"International Journal of Infectious Diseases","volume":"159 ","pages":"Article 108035"},"PeriodicalIF":4.3000,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Onchocerciasis status in Guinea-Bissau: An overview of trends in epidemiological and entomological indicators\",\"authors\":\"Natalie. V.S. Vinkeles Melchers , Cristovão Manjuba , Yao Sodahlon , Ramalho João Correia , Victorino Martinho Aiogalé , Léonce Aké Assi , Francisco Cabral , Paul T. Cantey , Wilma A. Stolk\",\"doi\":\"10.1016/j.ijid.2025.108035\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><h3>Objectives</h3><div>The World Health Organization recommends monitoring infection and entomological indicators to evaluate onchocerciasis elimination. We reviewed trends in Guinea-Bissau since the onset of interventions to assess current progress toward elimination.</div></div><div><h3>Methods</h3><div>We collated programmatic, entomological, and epidemiological data from Guinea-Bissau, including Onchocerciasis Control Programme (OCP) records, impact data, and community-directed treatment with ivermectin (CDTi) data. Trends were visualized to assess impact.</div></div><div><h3>Results</h3><div>Pre-control microfiladermia (mf) prevalences reached up to 70.6% along Rio Corubal and 27.4% along Rio Géba. Mf intensity ranged up to 59.9 and 6.5 mf/skin snip, respectively. Mf prevalence and intensity declined over time, despite irregular CDTi. In 2007-2008, the highest mf prevalence was 9.7% (Rio Corubal). Despite all villages being mf skin snip-negative by 2015, the detection of OV16 ELISA-positives (0.7%-14.9%) indicated ongoing transmission. Entomological surveys (2015) reported a blackfly infectivity rate of 0.06%, with infectious flies found at two of five sites (Gabú region).</div></div><div><h3>Conclusions</h3><div>CDTi substantially reduced mf prevalence, intensity, and vector infectivity in Guinea-Bissau, but transmission was not reduced to zero. Renewed serological and entomological assessments are needed to accurately determine elimination progress.</div></div>\",\"PeriodicalId\":14006,\"journal\":{\"name\":\"International Journal of Infectious Diseases\",\"volume\":\"159 \",\"pages\":\"Article 108035\"},\"PeriodicalIF\":4.3000,\"publicationDate\":\"2025-08-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Infectious Diseases\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1201971225002577\",\"RegionNum\":2,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"INFECTIOUS DISEASES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Infectious Diseases","FirstCategoryId":"3","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1201971225002577","RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"INFECTIOUS DISEASES","Score":null,"Total":0}
Onchocerciasis status in Guinea-Bissau: An overview of trends in epidemiological and entomological indicators
Objectives
The World Health Organization recommends monitoring infection and entomological indicators to evaluate onchocerciasis elimination. We reviewed trends in Guinea-Bissau since the onset of interventions to assess current progress toward elimination.
Methods
We collated programmatic, entomological, and epidemiological data from Guinea-Bissau, including Onchocerciasis Control Programme (OCP) records, impact data, and community-directed treatment with ivermectin (CDTi) data. Trends were visualized to assess impact.
Results
Pre-control microfiladermia (mf) prevalences reached up to 70.6% along Rio Corubal and 27.4% along Rio Géba. Mf intensity ranged up to 59.9 and 6.5 mf/skin snip, respectively. Mf prevalence and intensity declined over time, despite irregular CDTi. In 2007-2008, the highest mf prevalence was 9.7% (Rio Corubal). Despite all villages being mf skin snip-negative by 2015, the detection of OV16 ELISA-positives (0.7%-14.9%) indicated ongoing transmission. Entomological surveys (2015) reported a blackfly infectivity rate of 0.06%, with infectious flies found at two of five sites (Gabú region).
Conclusions
CDTi substantially reduced mf prevalence, intensity, and vector infectivity in Guinea-Bissau, but transmission was not reduced to zero. Renewed serological and entomological assessments are needed to accurately determine elimination progress.
期刊介绍:
International Journal of Infectious Diseases (IJID)
Publisher: International Society for Infectious Diseases
Publication Frequency: Monthly
Type: Peer-reviewed, Open Access
Scope:
Publishes original clinical and laboratory-based research.
Reports clinical trials, reviews, and some case reports.
Focuses on epidemiology, clinical diagnosis, treatment, and control of infectious diseases.
Emphasizes diseases common in under-resourced countries.