Incidence and risk factors for newly acquired hepatitis C virus infection among Aboriginal versus non-Aboriginal Canadians in six regions, 1999–2004

The purpose of this study was to compare hepatitis C virus (HCV) incidence and recent patterns of transmission within Aboriginal and non-Aboriginal Canadians. Cases of newly acquired HCV infection (in patients ≥15 years) reported to the Enhanced Hepatitis Strain Surveillance System from six jurisdictions in Canada were analyzed. Information on demographic and clinical characteristics as well as risk factors for HCV infection was collected using standardized questionnaires. Univariate analysis showed Aboriginal patients to be significantly more likely than non-Aboriginal patients to report injection drug use (77.1% vs. 64.0%; p < 0.05), to be female (54.6% vs. 37.6%; p < 0.05), to report high-risk sexual behaviors (48.6% vs. 34.1%, p < 0.05), and to report drug snorting (45.7% vs. 32.7%, p < 0.05). The median age of Aboriginal patients was significantly younger than that of non-Aboriginal patients (31 years [range, 15–71] vs. 34 years [range, 15–81]; p < 0.05). The overall incidence of HCV infection per 100,000 people aged 15 years and older was 18.9 (95% confidence interval [CI] 15.5–23.1) in Aboriginal people and 2.8 (95%CI 2.6–3.1) in non-Aboriginal people. Poisson regression analysis revealed that Aboriginal Canadians were more likely than non-Aboriginal Canadians to develop acute hepatitis C (adjusted rate ratio 5.8, 95%CI 4.7–7.3). An appropriate and effective public health strategy that includes planned and implemented prevention programs in partnership with the Aboriginal community is needed.     

Epidemic infectious gastrointestinal illness aboard U.S. Navy ships deployed to the Middle East during peacetime operations – 2000–2001

Background  

Infectious gastrointestinal illness (IGI) outbreaks have been reported in U.S. Navy ships and could potentially have an adverse mission impact. Studies to date have been anecdotal.     

The mitochondrial genome of the mosquito Anopheles gambiae: DNA sequence, genome organization, and comparisons with mitochondrial sequences of other insects

The entire 15,363 bp mitochondrial genome was cloned and sequenced from the mosquito Anopheles gambiae. With respect to the protein-coding genes, rRN A genes and the control region, the gene order was identical to that reported for other insects. There were significant differences, however, in the position and orientation of specific tRNA loci. The overall nucleotide composition was heavily biased towards adenine and thymine, which accounted for 77.6% of all nucleotides. Comparisons were made with the mitochondrial genomes of other insects on the basis genome size and organization, DNA and putative amino acid sequence data, nucleotide substitutions, codon usage and bias, and patterns of AT enrichment.     

Assessment of person-to-person transmission of hantavirus pulmonary syndrome in a Chilean hospital setting

Person-to-person transmission of Andes hantavirus among healthcare workers was reported in Argentina for the first time in 1996. To determine whether such transmission of the virus occurred during a 1997 outbreak of hantavirus pulmonary syndrome (HPS) in southern Chile due to Andes virus, we conducted a serological and epidemiological study in the Coyhaique Regional Hospital, where the majority of HPS patients were admitted. Workers in every department of the hospital were evaluated for immunoglobulin G (IgG) and IgM hantavirus antibodies using the enzyme-linked immunosorbent assay (ELISA). A standardized questionnaire was used to determine the type and extent of exposure to HPS patients, as well as other potential risk factors and previous febrile respiratory illnesses requiring hospitalization. Less than half (44%) reported always using gloves when touching patients or their secretions; respiratory protection was not used. Of the 319 participants (87·9% of those eligible), 12 (3·7%) had IgG antibodies. This finding is consistent with the antibody prevalence in the community in which the participants lived. Of the 12 positive healthcare workers, six reported contact with HPS patients. A similar exposure was found in those who tested negative [6/140 (4%) compared to 6/179 (3%), P=0·66]. There was no significant difference in the types of hospital activities performed or the number of hospitalizations for febrile respiratory illnesses between antibody-positive and antibody-negative individuals. These data suggest that there was no person-to-person transmission among healthcare workers during a recent outbreak of HPS in Southern Chile in 1997, despite the inconsistent use of any precautions against transmission.     

Polio eradication initiative in Africa: influence on other infectious disease surveillance development

Background  

The World Health Organization (WHO) and partners are collaborating to eradicate poliomyelitis. To monitor progress, countries perform surveillance for acute flaccid paralysis (AFP). The WHO African Regional Office (WHO-AFRO) and the U.S Centers for Disease Control and Prevention are also involved in strengthening infectious disease surveillance and response in Africa. We assessed whether polio-eradication initiative resources are used in the surveillance for and response to other infectious diseases in Africa.     

Phylogenetic analysis of severe fever with thrombocytopenia syndrome virus in Korean water deer (Hydropotes inermis argyropus) in the Republic of Korea

Severe fever with thrombocytopenia syndrome (SFTS) is an emerging zoonotic tick-borne disease caused by SFTS virus, which circulates among ticks and their host animals, including wildlife. However, few studies have examined SFTS virus infection in wildlife present in the Republic of Korea (ROK). We evaluated SFTS virus infection in tissue samples from Korean water deer (Hydropotes inermis argyropus), one of the most common wild ungulates in ROK. In this study, we evaluated tissue samples of 129 water deer carcasses collected in 2017 and detected SFTS viral RNA by conventional PCR. SFTS viral RNA was found in 3 of the 129 carcasses, showing a prevalence of 2.3 %; 2 of which were collected in Gyeongsangnam-do and 1 of which was in the Gangwon-do region. Among the 6 internal organs studied, only the spleen samples were positive. Phylogenetic analysis revealed close relationships between deer- and human-derived strains. The medium segments of the three positive cases clustered with genotype B, which is the predominant genotype in ROK. In the small segment, two cases clustered with genotype B, samples 17WD044 and 17WD065. The third sample, 17WD068 from Gangwon-do province, showed genotype A, which circulates mainly in China. The disagreement in the genotypes of the two tested segments suggests a potential reassortment between genotype A and B, resulting in genetic recombination as observed in sample 17WD068, which may be co-circulating in China and Korea. Further studies in wildlife and humans are necessary to understand the genetic characteristics of SFTS viruses circulating in ROK.     

外伤后破伤风疫苗和被动免疫制剂使用指南

外伤后破伤风是非新生儿破伤风的主要类型。为指导基层医疗机构做好外伤后破伤风的预防控制工作,尤其是外伤后的预防处置,降低破伤风发病率及病死率,中国疾病预防控制中心国家免疫规划技术工作组参考《2017年世界卫生组织破伤风立场文件》,以及国内外最新研究进展,制定了本指南。本指南主要介绍了外伤后破伤风预防处置的基本流程,破伤风疫苗和被动免疫制剂的使用方法及潜在外伤高危人群的暴露前免疫。     

基于“大数据”的流感预警研究进展

传统流感预警体系在监测范围、预测准确性和实时性等方面仍存在不足。随着新一轮科技革命的兴起,现代信息技术日趋成熟,以大数据分析为基础的流感预警技术已经成为研究焦点。本文以传统流感监测预警体系作为参照,从互联网、影响因素、时空趋势、风险评估4个角度总结基于大数据的流感预警研究进展,综述大数据在流感预警中的优势、不足及未来发展的趋势。     

Lessons on causality assessment and communications from the 2019 South-East Asia Regional (SEAR) workshop on inter-country expert review of selected Adverse Events Following Immunization (AEFI) cases

BackgroundSurveillance of AEFI is fundamental for improving safety and maintaining public support for vaccination. In SEAR, billions of doses of vaccine are given annually. The objective of the 2019 SEAR AEFI training workshop was to further strengthen in-country vaccine safety, assess capacity compared to 2014 and to better integrate communication into the AEFI causality assessment program.MethodsA 3 ½ day workshop with AEFI experts from all 11 SEAR countries. Participants outlined each county’s AEFI data, critiqued their AEFI program, reviewed and critiqued causality assessment of 23 anonymized serious AEFI cases and proposed communication plans for each.ResultsBetween 2016 and 2018, over 2.9 billion doses of vaccine were given in SEAR. Compared to 2014, AEFI detection and causality assessment skills had improved. AEFI experts’ communication planning skills markedly improved during the workshop. Good concordance was found between country causality assessment findings and the workshop critiques. A list of targeted recommendations (country, regional and global levels) arose from the workshop.ConclusionsSEAR countries have much improved their AEFI detection and causality assessment expertise since 2014. Given the high volume of doses administered and the AEFI technical expertise, SEAR countries can well monitor safety of regionally produced vaccines. Integration of AEFI communication into AEFI causality assessment can help mitigate potential negative impacts of serious AEFIs.     

Evaluation of the Caring Ahead: Preparing for End-of-Life With Dementia Questionnaire

ObjectivesFamily caregivers of persons with dementia rarely feel prepared for end of life although preparedness predicts outcomes in bereavement. The Caring Ahead: Preparing for End-of-Life With Dementia questionnaire was developed to measure family caregiver death preparedness. The aim of this study was to evaluate questionnaire psychometrics and refine the Caring Ahead questionnaire.DesignA quantitative cross-sectional reliability study design was used to evaluate the questionnaire.Setting/ParticipantsData were collected by mail from 134 English-speaking family caregivers of persons with dementia recruited from more than 50 congregate living facilities in Canada. Thirty-two participants completed a test-retest.MethodsAnalysis of psychometrics included exploratory factor analysis, calculation of correlation with a single-global preparedness item, Cronbach alpha, intraclass correlation coefficient (ICC) over time.ResultsA 4-factor model with 20 items emerged through exploratory factor analysis with principal factors extraction and promax rotation. The revised questionnaire includes 4 factor subscales: Actions (7 items), Dementia Knowledge (5 items), Communication (4 items), and Emotions and Support Needs (4 items). Evidence was demonstrated for concurrent validity (0.44-0.55, P < .001), internal consistency (alpha > 0.7), and reliability (ICCs > 0.7). Lower levels of preparedness were reported for “knowing what the dying process with dementia may be like” and “discussing end-of-life care and preferences with health care providers.”Conclusions and ImplicationsPreliminary evidence for validity and reliability of the refined 20-item Caring Ahead questionnaire suggests the questionnaire may be useful to clinicians and researchers seeking to assess caregivers’ feelings of preparedness, identify specific areas for intervention, and evaluate the effectiveness of caregiver interventions. Additional testing is needed to evaluate predictive validity.