Months Of Distribution Research Articles

Insufficient duration of insecticidal efficacy of Yahe® insecticide-treated nets in Papua New Guinea

BackgroundInsecticide-treated nets (ITNs) are the backbone of anti-malarial vector control in Papua New Guinea (PNG). Over recent years the quality and performance of ITNs delivered to PNG decreased, which has likely contributed to the stagnation in the malaria control effort in the country. The present study reports results from the first 24 months of a durability study with the ITN product Yahe LN® in PNG.MethodsThe durability study was conducted in four villages on the northern coast of PNG, in an area with high malaria parasite transmission, following WHO-recommended methodology adapted to the local scenario. A cohort of n = 500 individually identifiable Yahe® ITNs was distributed by the PNG National Malaria Control Programme from October to December 2021. Insecticidal efficacy of the ITNs was tested using cone bioassays with fully pyrethroid susceptible Anopheles farauti colony mosquitoes at baseline and at 6 months intervals, alongside evaluation of physical integrity and the proportion of ITNs lost to follow-up. A questionnaire was used to collect information on ITN end user behaviour, such as the frequency of use and washing. The observations from the durability study were augmented with simulated laboratory wash assays.ResultsGradual uptake and replacement of previous campaign nets by the communities was observed, such that at 6 months 45% of all newly distributed nets were in use in their designated households. Insecticidal efficacy of the Yahe® nets, expressed as the percent 24 h mortality in cone bioassays decreased from 91 to 45% within the first 6 months of distribution, even though > 90% of study nets had never been washed. Insecticidal efficacy decreased further to < 20% after 24 months. ITNs accumulated physical damage (holes) at a rate similar to previous studies, and 35% were classified as ‘too torn’ by proportional hole index after 24 months. ITNs were lost to follow-up such that 61% of cohort nets were still present after 24 months. Laboratory wash assays indicated a rapid reduction in insecticidal performance with each consecutive wash such that average 24 h mortality was below 20% after 10 washes.ConclusionYahe® ITNs are not performing as per label claim in an area with fully pyrethroid susceptible vectors, and should be investigated more comprehensively and in other settings for compliance with currently recommended durability and efficacy thresholds. The mass distribution of low quality ITN products with variable performance is one of the major ongoing challenges for global malaria control in the last decade.

Condition-Specific Pamphlets to Improve End-of-life Communication in Long-term Care: Staff Perceptions on Usability and Use

ObjectivesThis article reports findings on the usability and staff use of 5 condition- specific pamphlets of high prevalence in long-term care (LTC): dementia, heart failure, chronic obstructive pulmonary disease, renal failure, and frailty. The pamphlets were created in response to residents', families', and staff's recommendations for activating early reflections and communication about end-of-life care. DesignA mixed-method (qualitative and quantitative) survey design was used. Step 1 collected survey data on the usability of the pamphlets. Step 2 collected survey data on pamphlet use. Settings and ParticipantsTwo nurses with specialized palliative care training, 2 resident/family representatives, 10 condition-specific specialists, and 33 LTC palliative leads reviewed the pamphlets for usability prior to distribution. A total of 178 LTC home staff in 4 participating LTC homes reported on pamphlet use. MeasuresSpecialists and resident/family representatives were asked to provide open comments and LTC home palliative leads were asked to complete a survey on the accuracy, readability, and relevance of the pamphlets. After 6 months of distribution, all staff in participating LTC homes were asked to complete a survey on pamphlet use, usefulness, and comfort with distribution. ResultsThe pamphlets were reportedly accurate, relevant, and easy to understand. Following 6 months of availability, most staff in LTC had read the pamphlets, found the information useful, and planned to share them. However, half of the staff questioned their role in pamphlet distribution and most had not distributed them. Regulated staff (ie, staff affiliated with a regulated profession) expressed more comfort sharing the pamphlets than care aides and support staff. Conclusions/ImplicationsCondition-specific pamphlets appear to hold promise in providing residents and families with relevant information that may activate early reflections and conversations about end-of-life care. However, structured implementation strategies, training, and discussions are required to improve staff comfort with distribution and explore roles in distribution and follow-up.

Lessons Learned: Feasibility of a Discussion Prompting Tool to Increase Fertility Risk Discussion Among Adolescent Oncology Families

The purpose of this study was to explore the feasibility of distributing a prompting tool (stress egg) in order to increase discussions about fertility risk and preservation (FP) among female adolescent oncology patients, parents, and healthcare providers (HCP). 200 eggs were distributed to four pediatric oncology centers. Qualitative interviews were completed with healthcare staff (N=7) after 6 months of distribution to newly diagnosed female oncology patients ages 12-18. Interviews showed that the main barriers to distribution of the prompt were: forgetting to distribute the eggs; uncertainty about the significance of fertility; and uncertainty about fertility issues in general for female adolescent cancer patients. The scientific community must continually explore effective avenues of communication to ensure such information is received. The stress egg has potential to impact a cancer survivor’s outlook on future partnering, family life, and self-concept when used in conjunction with policy.

The Development and Acceptance of a Simple Tool to Aid IRB Compliance

The United States' Food and Drug Administration (FDA) has had an increase of warning letters issue' to institutional review boards (IRBs). These have been issued to IRBs of all experience levels, from the seemingly most inexperienced IRBs to IRBs accredited by the Association for Accreditation of Human Research Protection Programs. This exemplifies the fact that IRBs, no matter their size and experience, need compliance tools to assure that their activities and decisions are made within the confines of the regulations. A simple compliance tool was created for IRBs to improve their discussions and criteria-based decision making during convened meetings. The tool is a presentation of 14 slides consisting of the federal criteria for most major IRB decisions printed on 11-inch by 17-inch paper and then laminated to be used as placemats during convened IRB meetings. Recommendations for use were provided with this tool, but each IRB was free to use as desired. A survey was issued after 8 months of distribution to determine acceptance, methodology, and the perceived effect of the tool. While some IRBs did not utilize the tool, 80% of the responding IRB members and staff felt that it either somewhat or greatly enhanced their discussions and criteria-based decision making. The greatest satisfaction and perceived effect was when the tool was used in the recommended format. This results in a very inexpensive, customizable, and well-received compliance assurance tool that any IRB can easily adopt.

Tracking vaccine lot lifecycles using reports to the Vaccine Adverse Event Reporting System (VAERS)

There is currently no systematically available information available on how rapidly a specific lot of vaccine is used once distributed. We used data from reports to the Vaccine Adverse Event Reporting System (VAERS) to develop a proxy means of surveillance for the lifecycle of selected vaccine lots. A convenience sample, consisting of selected lots of: diphtheria, tetanus, and acellular pertussis (DTaP), Haemophilus influenzae type b (Hib), Hepatitis B, and varicella vaccines, was selected for lifecycle analysis. Assuming that circulation of a vaccine lot is proportional to vaccine-specific adverse event (AE) reporting for that vaccine type, we constructed Gamma distributed usage models and compared them with lot-specific VAERS reports to estimate the actual lifecycle of lots in the system. Evidence of lot circulation was detected within 1-2 months, and a peak was observed 3-4 months after the vaccine release date for most of the study vaccines. Ninety percent of the vaccine doses in each lot were estimated to be used within 5-9 months of distribution. The length of time a vaccine lot was in use ranged from 5 to 17 months from earliest vaccination date. Our modeled and inferred administration of the selected lots of different vaccines were concordant. This method may be useful for spatial and temporal tracking of vaccine lot utilization.

Village-based distribution of oral rehydration therapy packets in Bangladesh.

The distribution of sucrose-electrolyte oral therapy packets (1 liter) by community-based workers in a rural Bangladesh population of 157,000 was evaluated. A similar population of 134,000 served as a comparison group. The locally-produced packets showed satisfactory chemical composition with a shelf-life of up to 3 months and a cost of U.S. $0.05. After 4 months the workers were distributing an average of 70 packets/1,000 population per month. Most patients used one packet for each episode of diarrhea; 13% of children used two packets, and 15% and 8% of adults used, respectively, two and three packets. The electrolyte composition of the oral fluids prepared by field workers and mothers showed substantial variation, but no hyperconcentrated solutions were noted. A comparison of the hospitalization rate from the two study areas suggested a 29% reduction in hospitalization for diarrhea during the 4 months of distribution.