Dataset Information

Detection, molecular typing and phylogenetic analysis of Leishmania isolated from cases of leishmaniasis among Syrian refugees in Lebanon.

ABSTRACT: Leishmania is a parasitic protozoan with more than two-dozen species causing the disease leishmaniasis. It is transmitted to humans through the bite of an infected female phlebotomine sand-fly vector. In the past two years the incidence of leishmaniasis has been drastically increasing in Lebanon. This was in parallel with the deterioration of the security in Syria forcing thousands to flee and seek shelter in poorly maintained refugee camps and collective shelters. Cutaneous leishmaniasis (CL) is now considered a public health problem, but its epidemiology has not been fully elucidated. To our knowledge, this is the first study comparing two different molecular methods for the detection and identification of Leishmania tropica in Lebanon. Two molecular typing methods of 39 FFPE Leishmania isolates were used: the ITS1-PCR RFLP and the nested ITS1-5.8S rDNA gene amplification followed by sequencing and phylogenetic analysis. The efficiency of these two techniques in Leishmania identification was compared and the phylogenetic relationships among these isolates were illustrated based on the neighbor-joining (NJ) method. The results were statistically correlated with the parasitic index (PI). The DNA storage in formalin-fixed paraffin embedded (FFPE) tissues was assessed as well. The parasites identified were all L. tropica as determined by both techniques. ITS1-5.8S rDNA gene based typing proved to be more sensitive in the detection of parasites (positive in 69.2% of the isolates) as opposed to the ITS1-PCR RFLP method that was successful in identifying L. tropica in only 43.6% of the isolates. Sequencing and phylogenetic analysis revealed high levels of heterogeneity. A statistically significant correlation was observed between PI and the results of the nested ITS1-5.8S rDNA gene PCR. Genotyping at the species level is essential for monitoring the relative frequency of CL in the Mediterranean area that is correlated to three different Leishmania species (Leishmania infantum, Leishmania major and L. tropica), each characterized by distinct epidemiological features. The obtained results highlight the need to find a universally accepted diagnostic tool for Leishmania typing.

SUBMITTER: Salloum T

PROVIDER: S-EPMC5991828 | biostudies-literature | 2016 Jun

REPOSITORIES: biostudies-literature

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Detection, molecular typing and phylogenetic analysis of <i>Leishmania</i> isolated from cases of leishmaniasis among Syrian refugees in Lebanon.

Salloum Tamara T Khalifeh Ibrahim I Tokajian Sima S

Parasite epidemiology and control 20160227 2

<i>Leishmania</i> is a parasitic protozoan with more than two-dozen species causing the disease leishmaniasis. It is transmitted to humans through the bite of an infected female phlebotomine sand-fly vector. In the past two years the incidence of leishmaniasis has been drastically increasing in Lebanon. This was in parallel with the deterioration of the security in Syria forcing thousands to flee and seek shelter in poorly maintained refugee camps and collective shelters. Cutaneous leishmaniasis ...[more]

PMID: 29988171

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Project description:BackgroundHealth needs of displaced Syrians in refugee hosting countries have become increasingly complex in light of the protracted Syrian conflict. The primary aim of this study was to identify the primary health needs of displaced Syrians in Iraq, Jordan, Lebanon, Turkey, and Syria.MethodsA systematic review was performed using 6 electronic databases, and multiple grey literature sources. Title, abstract, and full text screening were conducted following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses. The target population was Syrian individuals displaced due to conflict in Syria and its neighboring countries. The outcomes of interest were health needs (i.e. health problems that can be addressed by health services), gaps in health services, training, and workforce. Studies on mixed refugee populations and Syrians displaced prior to the conflict were excluded.ResultsThe Lebanon-specific results of the review were validated through two stakeholder roundtable discussions conducted with representatives from primary healthcare centers, non-governmental organizations and humanitarian aid agencies. A total of 63 articles were included in the analysis. Mental health and women's health were identified as the greatest health needs in the region. The most common health problems were Non-communicable diseases in Jordan, women's health in Lebanon and mental health in Turkey. Studies addressing gaps in services found the highest gap in general healthcare services, followed by women's health, mental health, and vaccinations. Sub-optimal training and availability of health workers was also noted particularly in Syria.Results from the stakeholders' discussions in Lebanon showed communicable diseases, women's health and mental health as the main health needs of Syrian refugees in Lebanon. Reported barriers to accessing health services included geographical barriers and lack of necessary awareness and education.ConclusionThere is a need for an enhanced synchronized approach in Syria's refugee hosting neighboring countries to reduce the existing gaps in responding to the needs of Syrian refugees, especially in regards to women's health, mental health, and communicable diseases. This mainly includes training of healthcare workers to ensure a skilled workforce and community-based efforts to overcome barriers to access, including lack of knowledge and awareness about highly prevalent health conditions.

Project description:AimsChildren's responses to war and displacement are varied; many struggle, while others appear resilient. However, research into these outcomes disproportionately focuses on cross-sectional data in high-income countries. We aimed to (1) investigate change in resilience across two timepoints in a highly vulnerable sample of Syrian refugee children in Lebanon, and (2) explore predictors of their mental health problems across time.MethodsIn total, 982 Syrian child-caregiver dyads living in refugee settlements in Lebanon completed questionnaires via interview at baseline and follow-up one year later. We categorised children into groups based on their risk for mental health problems across both timepoints (stable high risk/SHR, deteriorating, improving, stable low risk) according to locally validated cut-offs on measures of post-traumatic stress disorder (PTSD), depression and behavioural problems. Analyses of covariance identified how the groups differed on a range of individual and socio-environmental predictors, followed up by cross-lagged panel models (CLPMs) to investigate the directionality of the relationships between significantly related predictors and symptoms.ResultsThe sample showed a meaningful amount of change in mental health symptoms from baseline to follow-up. Over half (56.3%) of children met SHR criteria and 10.3% deteriorated over time, but almost one-quarter (24.2%) showed meaningful improvement, and 9.2% were consistently at low risk for mental health problems at both timepoints. Several predictors differentiated the groups, particularly social measures. According to CLPMs, maternal acceptance (β = -0.07) predicted child mental health symptoms over time. Self-esteem (β = -0.08), maternal psychological control (β = 0.10), child maltreatment (β = 0.09) and caregiver depression (β = 0.08) predicted child symptoms and vice versa (βse = -0.11, βb = 0.07, βmpc = 0.08, βcm = 0.1, βcd = 0.11). Finally, child symptoms predicted loneliness (β = 0.12), bullying (β = 0.07), perceived social support (β = -0.12), parent-child conflict (β = 0.13), caregiver PTSD (β = 0.07), caregiver anxiety (β = 0.08) and the perceived refugee environment (β = -0.09).ConclusionsOur results show risk and resilience are dynamic, and the family environment plays a key role in children's response to war and displacement. Conversely, children also have a significant impact on the family environment and caregiver's own mental health. Interventions to promote resilience in refugee children should therefore consider family-wide mechanisms.

Project description:BackgroundSince the outbreak of the Syrian war in 2011, close to 6 million Syrian refugees have escaped to Syria's neighbouring countries, including Lebanon. Evidence suggests rising levels of mental health disorders among Syrian refugee populations. Yet, to the best of our knowledge, large-scale studies addressing the mental health of adult Syrian refugees in Lebanon are lacking. We examined the prevalence of depression symptoms, which represent a common and debilitating mental health disorder among Syrian refugee populations in Lebanon, along with their sociodemographic and clinical correlates.MethodsA cross-sectional survey design was conducted as part of a collaborative project-"Sijilli"- led by the Global Health Institute at the American University of Beirut (Beirut, Lebanon) across 4 informal tented settlements for refugees (Beirut, Bekaa, North, South) in Lebanon among adult Syrian refugees (≥18), over a period extending from 2018 to 2020. The survey inquired about participants' sociodemographic and clinical characteristics, and screened participants for symptoms of depression through sequential methodology using the Patient Health Questionnaire (PHQ-2 and PHQ-9).ResultsA total of 3255 adult Syrian refugees were enrolled in the study. Of those refugees, 46.73% (n = 1521) screened positive on the PHQ-2 and were therefore eligible to complete the PHQ-9. In the entire sample (n = 3255), the prevalence of moderate to severe depression symptoms (PHQ-2 ≥ 2 and then PHQ-9 ≥ 10) was 22% (n = 706). Further analyses indicate that being ≥45 years of age (OR 1.61, 95% CI 1.13-2.30), a woman (OR 1.34, 95% CI 1.06-1.70), widowed (OR 2.88, 95% CI 1.31-6.32), reporting a neurological (OR 1.73, 95% CI 1.15-2.60) or a mental health condition (OR 3.98, 95% CI 1.76-8.97) are major risk factors for depression.ConclusionOur study suggests that an estimated one in four Syrian refugees in Lebanon shows moderate to severe depression symptoms, and our findings have important public health and clinical implications on refugee health. There is a need to enhance screening efforts, to improve access and referral to mental health services, and to improve post-migration factors among Syrian refugees in Lebanon.

Project description:Implementing and evaluating interventions in humanitarian settings in low- and middle-income countries presents unique challenges that are little addressed in the implementation literature. We document the process of developing, implementing, and evaluating the Amenah pilot intervention that aimed to mitigate the drivers of early marriage in a Syrian refugee community in Lebanon. Adolescent girls' vulnerability to early marriage increases following displacement due to poverty, insecurity, and school disruptions. We delineate how, as a local research team, we triangulated evidence from the international literature and formative community research to make informed decisions during the intervention's design and implementation phases. The pilot was delivered to 203 Syrian refugee schoolgirls aged 11-14 years during the 2017-2018 academic year. It consisted of 16 structured, interactive sessions with girls and a set of facilitated meetings with the girls' mothers, both of which were implemented by trained female community workers from the Syrian refugee community. Process evaluation results showed that sociodemographic factors predicted attendance among mothers, but relationships with peers in the intervention were the only significant predictor of attendance among girls. The primary outcomes of the pilot were attitudinal measures related to education and marriage. Attitudes toward education were highly positive at baseline and did not change over the course of the intervention. There were no significant changes in girls' ideal age at marriage. Among girls aged 13 and older at endline, the mean self-reported expected age at marriage increased slightly from 20.2 to 20.8 years (P<.05). Our results also suggest that girls may adjust their expected age at marriage downward as they become older and if they drop out of school. We reflect in the discussion on some of the challenges encountered and lessons learned for the benefit of researchers intending to conduct community-based interventions in displacement settings.

Project description:BackgroundParenting interventions in humanitarian settings have prioritized the acquisition of parenting knowledge and skills, while overlooking the adverse effects of stress and distress on parenting-a key mediator of refugee children's mental health. We evaluated the effectiveness of the Caregiver Support Intervention (CSI), which emphasizes caregiver wellbeing together with training in positive parenting.MethodsWe conducted a two-arm randomized controlled trial of the CSI with Syrian refugees in Lebanon, with an intent-to-treat design, from September 2019-December 2020. A total of 480 caregivers from 240 families were randomized to the CSI or a waitlist control group (1:1). Retention from baseline to endline was 93%. Data on parenting and caregiver psychological wellbeing were collected at baseline, endline, and three-month follow-up. Prospective trial registration: ISRCTN22321773.ResultsWe did not find a significant change on overall parenting skills at endline (primary outcome endpoint) (d = .11, p = .126) or at follow-up (Cohen's d = .15, p = .054). We did find a significant effect on overall parenting skills among participants receiving the full intervention-the sub-sample not interrupted by (COVID-19) (d = 0.25, p < .05). The CSI showed beneficial effects in the full sample at endline and follow-up on harsh parenting (d = -.17, p < .05; d = .19, p < .05), parenting knowledge (d = .63, p < .001; d = .50, p < .001), and caregiver distress (d = -.33, p < .001; d = .23, p < .01). We found no effects on parental warmth and responsiveness, psychosocial wellbeing, stress, or stress management. Changes in caregiver wellbeing partially mediated the impact of the CSI on harsh parenting, accounting for 37% of the reduction in harsh parenting.ConclusionsThe CSI reduced harsh parenting and caregiver distress, and demonstrated the value of addressing caregiver wellbeing as a pathway to strengthening parenting in adversity. These effects were achieved despite a pandemic-related lockdown that impacted implementation, a severe economic crisis, and widespread social unrest. Replication under less extreme conditions may more accurately demonstrate the intervention's full potential.

Project description:BackgroundMultipurpose cash transfers (MPCs) are used on a widespread basis in the Syrian refugee response; however, there is little to no evidence as to how they affect health in humanitarian crises.MethodsA prospective cohort study was conducted from May 2018 through July 2019 to evaluate the impact of MPCs on health care-seeking and expenditures for child, adult acute, and adult chronic illness by Syrian refugees in Lebanon. Households receiving MPCs from UNHCR were compared to control households not receiving UNHCR MPCs.ResultsCare-seeking for childhood illness was consistently high in both MPC and non-MPC households. An increased proportion of households did not receive all recommended care due to cost; this increase was 19.3% greater among MPC recipients than controls (P = 0.002). Increases in child hospitalizations were significantly smaller among MPC recipients than controls (DiD -6.1%; P = 0.037). For adult acute illnesses, care-seeking increased among MPC recipients but decreased in controls (adjusted DiD 11.3%; P = 0.057); differences in change for other utilization outcomes were not significant. The adjusted difference in change in the proportion of MPC households not receiving recommended chronic illness care due to cost compared to controls was - 28.2% (P = 0.073). Access to medication for adult chronic illness also marginally significantly improved for MPC households relative to controls. The proportion of MPC recipients reporting expenses for the most recent child and adult acute illness increased significantly, as did the [log] total visit cost. Both MPC and control households reported significant increases in borrowing to pay for health expenses over the year study period, but differences in change in borrowing or asset sales were not significant, indicating that MPC was not protective against for household financial risks associated with health.ConclusionsWhile MPC may have shown some positive effects, findings were mixed and MPC appears insufficient on its own to address health utilization and expenditures. A broader strategy addressing Syrian refugee health in Lebanon is needed of which MPC should be incorporated, with additional support such as additional conditional cash transfers for health.

Dataset Information

Detection, molecular typing and phylogenetic analysis of Leishmania isolated from cases of leishmaniasis among Syrian refugees in Lebanon.

Publications

Detection, molecular typing and phylogenetic analysis of <i>Leishmania</i> isolated from cases of leishmaniasis among Syrian refugees in Lebanon.

Similar Datasets

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