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Risk factor assessment for clinical malaria among forest-goers in a pre-elimination setting in Phu Yen Province, Vietnam.
Malaria Journal ( IF 3 ) Pub Date : 2019-12-20 , DOI: 10.1186/s12936-019-3068-4 Sara E Canavati 1 , Gerard C Kelly 1 , Cesia E Quintero 1 , Thuan Huu Vo 1 , Long Khanh Tran 1 , Colin Ohrt 1 , Thang Duc Ngo 2 , Duong Thanh Tran 2 , Nicholas J Martin 3
Malaria Journal ( IF 3 ) Pub Date : 2019-12-20 , DOI: 10.1186/s12936-019-3068-4 Sara E Canavati 1 , Gerard C Kelly 1 , Cesia E Quintero 1 , Thuan Huu Vo 1 , Long Khanh Tran 1 , Colin Ohrt 1 , Thang Duc Ngo 2 , Duong Thanh Tran 2 , Nicholas J Martin 3
Affiliation
BACKGROUND
The transition from malaria control to elimination requires understanding and targeting interventions among high-risk populations. In Vietnam, forest-goers are often difficult to test, treat and follow-up for malaria because they are highly mobile. If undiagnosed, forest-goers can maintain parasite reservoirs and contribute to ongoing malaria transmission.
METHODS
A case-control study was conducted to identify malaria risk factors associated with forest-goers in three communes in Phu Yen Province, Vietnam. Cases (n = 81) were residents from the study area diagnosed with malaria and known to frequent forest areas. Controls (n = 94) were randomly selected forest-going residents from within the study area with no identified malaria infection. Participants were interviewed face-to-face using a standard questionnaire to identify malaria risk factors. Logistic regression was used to calculate odds ratios (ORs) and 95% CI for risk factors after adjusting for socio-demographic characteristics.
RESULTS
Among the cases, malaria infection varied by species: 66.7% were positive for Plasmodium falciparum, 29.6% for Plasmodium vivax, and 3.7% were diagnosed as mixed infection. Cases were less likely than controls to use treated nets (aOR = 0.31; 95% CI 0.12-0.80), work after dark (aOR = 2.93; 95% CI 1.35, 6.34), bath in a stream after dark (aOR = 2.44; 95% CI 1.02-5.88), and collect water after dark (aOR = 1.99; 95% CI 1.02-3.90).
CONCLUSIONS
As Vietnam moves toward malaria elimination, these findings can inform behaviour change communication and malaria prevention strategies, incorporating the risk of after-dark and water-related activities, in this priority and difficult-to-access population group.
中文翻译：
在越南富安省的消除前环境中，林场人群中临床疟疾的危险因素评估。
背景技术从疟疾控制到消除疟疾的过渡需要了解和针对高风险人群进行干预。在越南，林木人经常携带疟疾，因此很难进行测试，治疗和跟进疟疾。如果不加以诊断，林地居民可以维持寄生虫库并促进持续的疟疾传播。方法进行了病例对照研究，确定了越南富安省三个公社与林民相关的疟疾危险因素。病例（n = 81）是来自研究区的居民，被诊断出患有疟疾，并且经常出没于森林地区。对照（n = 94）是从研究区域内随机选择的未发现疟疾感染的森林居民。使用标准问卷对参与者进行了面对面的访谈，以确定疟疾的危险因素。在调整了社会人口特征后，使用Logistic回归计算风险因素的比值比（OR）和95％CI。结果在这些病例中，疟疾感染因物种而异：恶性疟原虫阳性为66.7％，间日疟原虫为29.6％，诊断为混合感染为3.7％。与对照组相比，病例不太可能使用处理过的蚊帐（aOR = 0.31； 95％CI 0.12-0.80），天黑后工作（aOR = 2.93； 95％CI 1.35、6.34），天黑后在溪流中沐浴（aOR = 2.44； 95％CI 1.02-5.88），天黑后收集水（aOR = 1.99； 95％CI 1.02-3.90）。结论随着越南朝着消除疟疾的方向迈进，这些发现可以为行为改变交流和疟疾预防策略提供参考，
更新日期：2019-12-20
中文翻译：
在越南富安省的消除前环境中，林场人群中临床疟疾的危险因素评估。
背景技术从疟疾控制到消除疟疾的过渡需要了解和针对高风险人群进行干预。在越南，林木人经常携带疟疾，因此很难进行测试，治疗和跟进疟疾。如果不加以诊断，林地居民可以维持寄生虫库并促进持续的疟疾传播。方法进行了病例对照研究，确定了越南富安省三个公社与林民相关的疟疾危险因素。病例（n = 81）是来自研究区的居民，被诊断出患有疟疾，并且经常出没于森林地区。对照（n = 94）是从研究区域内随机选择的未发现疟疾感染的森林居民。使用标准问卷对参与者进行了面对面的访谈，以确定疟疾的危险因素。在调整了社会人口特征后，使用Logistic回归计算风险因素的比值比（OR）和95％CI。结果在这些病例中，疟疾感染因物种而异：恶性疟原虫阳性为66.7％，间日疟原虫为29.6％，诊断为混合感染为3.7％。与对照组相比，病例不太可能使用处理过的蚊帐（aOR = 0.31； 95％CI 0.12-0.80），天黑后工作（aOR = 2.93； 95％CI 1.35、6.34），天黑后在溪流中沐浴（aOR = 2.44； 95％CI 1.02-5.88），天黑后收集水（aOR = 1.99； 95％CI 1.02-3.90）。结论随着越南朝着消除疟疾的方向迈进，这些发现可以为行为改变交流和疟疾预防策略提供参考，
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