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23 result(s) for "Joseph, Vena"
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Experiences of Young Adults With Lymphoma During the COVID-19 Pandemic
PURPOSE: To investigate the experiences of young adults with lymphoma during the COVID-19 pandemic. PARTICIPANTS & SETTING: 8 young adults with Hodgkin or non-Hodgkin lymphoma from one National Cancer Institute-designated cancer center in the northeastern United States. METHODOLOGIC APPROACH: Secondary data analysis of a study that investigated the experiences of young adults with lymphoma during acute survivorship was used. Thematic analysis was chosen for the secondary data analysis methodology. FINDINGS: Three themes define the experiences of young adults with lymphoma during the COVID-19 pandemic: susceptibility and threats of COVID-19, isolation and confronting cancer alone, and healthcare provider supportive care. IMPLICATIONS FOR NURSING: Nurse-led survivorship care and education of young adults with cancer may mitigate COVID-19-related anxiety and threats.
High-throughput malaria serosurveillance using a one-step multiplex bead assay
Background Serological data indicating the presence and level of antibodies against infectious disease antigens provides indicators of exposure and transmission patterns in a population. Laboratory testing for large-scale serosurveys is often hindered by time-consuming immunoassays that employ multiple tandem steps. Some nations have recently begun using malaria serosurveillance data to make inferences about the malaria exposure in their populations, and serosurveys have grown increasingly larger as more accurate estimates are desired. Presented here is a novel approach of antibody detection using bead-based immunoassay that involves incubating all assay reagents concurrently overnight. Results A serosurvey in was performed in Haiti in early 2017 with both sera (n = 712) and dried blood spots (DBS, n = 796) collected for the same participants. The Luminex ® multiplex bead-based assay (MBA) was used to detect total IgG against 8 malaria antigens: PfMSP1, PvMSP1, PmMSP1, PfCSP, PfAMA1, PfLSA1, PfGLURP-R0, PfHRP2. All sera and DBS samples were assayed by MBA using a standard immunoassay protocol with multiple steps, as well a protocol where sample and all reagents were incubated together overnight—termed here the OneStep assay. When compared to a standard multi-step assay, this OneStep assay amplified the assay signal for IgG detection for all 8 malaria antigens. The greatest increases in assay signal were seen at the low- and mid-range IgG titers and were indicative of an enhancement in the analyte detection, not simply an increase in the background signal of the assay. Seroprevalence estimates were generally similar for this sample Haitian population for all antigens regardless of serum or DBS sample type or assay protocol used. Conclusions When using the MBA for IgG detection, overnight incubation for the test sample and all assay reagents greatly minimized hands-on time for laboratory staff. Enhanced IgG signal was observed with the OneStep assay for all 8 malaria antigens employed in this study, and seroprevalence estimates for this sample population were similar regardless of assay protocol used. This overnight incubation protocol has the potential to be deployed for large-scale malaria serosurveys for the high-throughput and timely collection of antibody data, particularly for malaria seroprevalence estimates.
Programmatic options for monitoring malaria in elimination settings: easy access group surveys to investigate Plasmodium falciparum epidemiology in two regions with differing endemicity in Haiti
Background As in most eliminating countries, malaria transmission is highly focal in Haiti. More granular information, including identifying asymptomatic infections, is needed to inform programmatic efforts, monitor intervention effectiveness, and identify remaining foci. Easy access group (EAG) surveys can supplement routine surveillance with more granular information on malaria in a programmatically tractable way. This study assessed how and which type of venue for EAG surveys can improve understanding malaria epidemiology in two regions with different transmission profiles. Methods EAG surveys were conducted within the departments of Artibonite and Grand’Anse (Haiti), in regions with different levels of transmission intensity. Surveys were conducted in three venue types: primary schools, health facilities, and churches. The sampling approach varied accordingly. Individuals present at the venues at the time of the survey were eligible whether they presented malaria symptoms or not. The participants completed a questionnaire and were tested for Plasmodium falciparum by a highly sensitive rapid diagnostic test (hsRDT). Factors associated with hsRDT positivity were assessed by negative binomial random-effects regression models. Results Overall, 11,029 individuals were sampled across 39 venues in Artibonite and 41 in Grand’Anse. The targeted sample size per venue type (2100 in Artibonite and 2500 in Grand’Anse) was reached except for the churches in Artibonite, where some attendees left the venue before they could be approached or enrolled. Refusal rate and drop-out rate were < 1%. In total, 50/6003 (0.8%) and 355/5026 (7.1%) sampled individuals were hsRDT positive in Artibonite and Grand’Anse, respectively. Over half of all infections in both regions were identified at health facilities. Being male and having a current or reported fever in the previous 2 weeks were consistently identified with increased odds of being hsRDT positive. Conclusions Surveys in churches were problematic because of logistical and recruitment issues. However, EAG surveys in health facilities and primary schools provided granular information about malaria burden within two departments in Haiti. The EAG surveys were able to identify residual foci of transmission that were missed by recent national surveys. Non-care seeking and/or asymptomatic malaria infections can be identified in this alternative surveillance tool, facilitating data-driven decision-making for improved targeting of interventions.
Quality control of multiplex antibody detection in samples from large-scale surveys: the example of malaria in Haiti
Measuring antimalarial antibodies can estimate transmission in a population. To compare outputs, standardized laboratory testing is required. Here we describe the in-country establishment and quality control (QC) of a multiplex bead assay (MBA) for three sero-surveys in Haiti. Total IgG data against 21 antigens were collected for 32,758 participants. Titration curves of hyperimmune sera were included on assay plates, assay signals underwent 5-parameter regression, and inspection of the median and interquartile range (IQR) for the y-inflection point was used to determine assay precision. The medians and IQRs were similar for Surveys 1 and 2 for most antigens, while the IQRs increased for some antigens in Survey 3. Levey-Jennings charts for selected antigens provided a pass/fail criterion for each assay plate and, of 387 assay plates, 13 (3.4%) were repeated. Individual samples failed if IgG binding to the generic glutathione- S -transferase protein was observed, with 659 (2.0%) samples failing. An additional 455 (1.4%) observations failed due to low bead numbers (<20/analyte). The final dataset included 609,438 anti-malaria IgG data points from 32,099 participants; 96.6% of all potential data points if no QC failures had occurred. The MBA can be deployed with high-throughput data collection and low inter-plate variability while ensuring data quality.
Conventional and High-Sensitivity Malaria Rapid Diagnostic Test Performance in 2 Transmission Settings
Accurate malaria diagnosis is foundational for control and elimination, and Haiti relies on histidine-rich protein 2 (HRP2)–based rapid diagnostic tests (RDTs) identifying Plasmodium falciparum in clinical and community settings. In 2017, 1 household and 2 easy-access group surveys tested all participants (N = 32 506) by conventional and high-sensitivity RDTs. A subset of blood samples (n = 1154) was laboratory tested for HRP2 by bead-based immunoassay and for P. falciparum 18S rDNA by photo-induced electron transfer polymerase chain reaction. Both RDT types detected low concentrations of HRP2 with sensitivity estimates between 2.6 ng/mL and 14.6 ng/mL. Compared to the predicate HRP2 laboratory assay, RDT sensitivity ranged from 86.3% to 96.0% between tests and settings, and specificity from 90.0% to 99.6%. In the household survey, the high-sensitivity RDT provided a significantly higher number of positive tests, but this represented a very small proportion (<0.2%) of all participants. These data show that a high-sensitivity RDT may have limited utility in a malaria elimination setting like Haiti.
Selection of Antibody Responses Associated With Plasmodium falciparum Infections in the Context of Malaria Elimination
In our aim to eliminate malaria, more sensitive tools to detect residual transmission are quickly becoming essential. Antimalarial antibody responses persist in the blood after a malaria infection and provide a wider window to detect exposure to infection compared to parasite detection metrics. Here, we aimed to select antibody responses associated with recent and cumulative exposure to malaria using cross-sectional survey data from Haiti, an elimination setting. Using a multiplex bead assay, we generated data for antibody responses (immunoglobulin G) to 23 targets in 29,481 participants across three surveys. This included one community-based survey in which participants were enrolled during household visits and two sentinel group surveys in which participants were enrolled at schools and health facilities. First, we correlated continuous antibody responses with age (Spearman) to determine which showed strong age-related associations indicating accumulation over time with limited loss. AMA-1 and MSP-1 antibody levels showed the strongest correlation with age (0.47 and 0.43, < 0.001) in the community-based survey, which was most representative of the underlying age structure of the population, thus seropositivity to either of these antibodies was considered representative of cumulative exposure to malaria. Next, in the absence of a gold standard for recent exposure, we included antibody responses to the remaining targets to predict highly sensitive rapid diagnostic test (hsRDT) status using receiver operating characteristic curves. For this, only data from the survey with the highest hsRDT prevalence was used (7.2%; 348/4,849). The performance of the top two antigens in the training dataset (two-thirds of the dataset; = 3,204)-Etramp 5 ag 1 and GLURP-R0 (area-under-the-curve, AUC, 0.892 and 0.825, respectively)-was confirmed in the test dataset (remaining one-third of the dataset; = 1,652, AUC 0.903 and 0.848, respectively). As no further improvement was seen by combining seropositivity to GLURP-R0 and Etramp 5 ag 1 ( = 0.266), seropositivity to Etramp 5 ag 1 alone was selected as representative of current or recent exposure to malaria. The validation of antibody responses associated with these exposure histories simplifies analyses and interpretation of antibody data and facilitates the application of results to evaluate programs.
Does abolishing user fees for family planning increase contraception use? An impact evaluation of the national policy in Burkina Faso
Unmet needs for contraception constitute a major public health problem in sub-Saharan Africa. Several mechanisms have been tested to reduce the financial barrier and facilitate access to family planning services, with inconclusive results. Based on the positive impacts following the introduction of free health care for pregnant women, Burkina Faso decided to extend its national policy and abolished direct payment for family planning services. This study aims to evaluate the impact of this policy on contraceptive use and unmet needs for contraception among women of reproductive age (WRA) in Burkina Faso. This study uses two different study designs to examine the impact of a user fee removal policy on contraceptive use across a panel of 1400 households randomly selected across eight health districts. Data were collected using a standardized socio-demographic questionnaire at three different time points during the pilot and scale-up phases of the fee abolition program. The questionnaire was administered six months after the launch of the pilot fee abolition program in four health districts. For the remaining four health districts, the survey was conducted one year prior to and six months after the implementation of the program in those areas. All WRA in the households were eligible to participate. A cross-sectional study design was used to determine the association between knowledge of the fee abolition policy among WRA and actual use of contraceptives by WRA six months after the policy's implementation and across all eight districts. Additionally, a pre-post study with a non-randomized, reflexive control group was designed using repeated surveys in four health districts. Hierarchical logistic mixed effects models were adjusted for a set of time-variant individual variables; the impact was assessed by a difference-in-differences approach that compared pre-post changes in contraception use in women who knew about the new policy and those who did not. Of the 1471 WRA surveyed six months after the removal of user fees for family planning services, 56% were aware of the policy's existence. Knowledge of the fee abolition policy was associated with a 46% increase probability of contraceptive use among WRA six months after the policy's implementation. Among the subset of the participants who were surveyed twice (n = 507), 65% knew about the fee removal policy six months after its introduction and constitute the intervention group. Pre-post changes in contraceptive use differed significantly between the intervention (n = 327) and control groups (n = 180). Removing user fees for family planning led to an 86% (95% confidence interval (CI) = 0.49, 1.31) increase in the likelihood of using contraception. In the study area, the policy reduced the prevalence of unmet needs for contraception by 13 percentage points. Removing user fees for family planning services is a promising strategy to increase access to, and reduce unmet needs for, contraception. A broader dissemination of the policy's existence will likely increase its impact on the overall population.
The Lived Experience of Young Adults with Lymphoma During Acute Survivorship
Introduction: Non-Hodgkin lymphoma and Hodgkin lymphoma are hematologic malignancies of the lymphatic system with increased prevalence in young adults. Limited research has explored the experiences of young adults with lymphoma during acute survivorship, defined as the period of cancer survivorship at diagnosis, relapse, or remission when a cancer patient is actively receiving acute medical treatment or intervention.Purpose: This study aimed to uncover the experiences of young adults with lymphoma receiving treatment or intervention during acute survivorship.Method: The qualitative hermeneutic interpretive phenomenological method was implemented in this study. Purposive sampling was utilized to recruit young adults with lymphoma who had received acute medical treatment within 90 days from one National Cancer Institute-Designated Cancer Center in the Northeastern United States. Colaizzi’s data analysis method was used to evaluate the data and create a comprehensive description of the experience.Results: Eight young adults with lymphoma receiving medical treatment or intervention during acute survivorship were enrolled and participated in the study. Five themes were developed to describe the experience of young adults with lymphoma during acute survivorship, including discovering cancer, introducing cancer, fostering relationships, uncontrollable factors, and reflections and growth.Implications: This study adds to the limited body of research in the young adult lymphoma population by exploring their lived experience during acute survivorship. Consistent with prior research on young adults with lymphoma, cancer was challenging to diagnose among participants in this study. Through post-diagnosis, young adults with lymphoma were determined to safeguard parents and close family members from the emotional burden of cancer. The bond between the participants, medical oncologists, and nurses offered a dynamic structure to endure during acute survivorship. Nurses' physical and emotional presence was a substantial factor that enabled study participants to cope with the lymphoma diagnosis and the subsequent treatment. In this study, the lived experience of young adults with lymphoma underscores the importance of distinct and structured post-diagnosis survivorship care.
Conventional and High-Sensitivity Malaria Rapid Diagnostic Test Performance in Two Transmission Settings: Haiti 2017
Accurate malaria diagnosis is foundational for control and elimination, and Haiti relies on HRP2-based rapid diagnostic tests (RDTs) identifying Plasmodium falciparum in clinical and community settings. In 2017, one household and two easy-access group (EAG) surveys tested all participants (N=32,506) by conventional and high-sensitivity RDTs (cRDT/hsRDT). A subset of blood samples (n=1,154) were laboratory tested for HRP2 by bead-based immunoassay and for P. falciparum 18S rDNA by PET-PCR. Both RDT types detected low concentrations of HRP2 with sensitivity estimates between 2.6 and 14.6 ng/mL. Compared to the predicate HRP2 laboratory assay,, RDT sensitivity ranged from 86.3% to 96.0% between tests and settings, and specificity from 90.0% to 99.6%. In the household survey, the hsRDT provided a significantly higher number of positive tests, but this represented a very small proportion (<0.2%) of all participants. These data show an hsRDT may have limited utility in a malaria elimination setting like Haiti.
Testes in Enchytraeus fragmentosus Bell
Testes have been localized in the seventh or eighth segment of Enchytraeus fragmentosus Bell. This species was previously described as lacking gonads.Testes have been localized in the seventh or eighth segment of Enchytraeus fragmentosus Bell. This species was previously described as lacking gonads.