We have investigated biofouling behavior in forward osmosis (FO) and reverse osmosis (RO) membrane systems. Analysis of these two systems was done via comparison of biofilm structure and membrane ...permeate water flux decline. Experiments were performed using a model wastewater solution inoculated with Pseudomonas aeruginosa in laboratory-scale FO and RO test cells. For a meaningful comparison, biofouling runs were carried out using the same thin-film composite polyamide FO membrane, identical hydrodynamic conditions, and an initial permeate water flux of 19Lm−2h−1. Water flux decline after 600mL of cumulative permeate volume (or ~17–18h of fouling) was significantly lower in FO (~10%) compared to RO (~30%). FO biofilms grew in a loosely organized thick layer, with eminent mushroom-shaped structures, while RO biofilms grew in tightly organized mats encased in larger amounts of extracellular polymeric substances (EPS) per cell. The more compact biofilms in RO induced greater biofilm-enhanced osmotic pressure and hydraulic resistance to water flow compared to FO, which resulted in higher flux decline. We attribute the differences in biofouling behaviors in FO and RO to the different driving forces: osmotic pressure in FO and hydraulic pressure in RO.
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•We compare biofouling behaviors in FO and RO membrane systems.•Water flux decline was significantly more pronounced in RO than FO.•Biofilms in FO were thick, loosely organized, and with mushroom shaped structures.•Biofilms in RO were tightly organized due to the applied hydraulic pressure.•Differences in biofouling are due to differences in driving forces in FO and RO.
Background: Community health workers (CHWs) can play vital roles in increasing coverage of basic health services. However, there is a need for a systematic categorisation of CHWs that will aid common ...understanding among policy makers, programme planners, and researchers.
Objective: To identify the common themes in the definitions and descriptions of CHWs that will aid delineation within this cadre and distinguish CHWs from other healthcare providers.
Design: A systematic review of peer-reviewed papers and grey literature.
Results: We identified 119 papers that provided definitions of CHWs in 25 countries across 7 regions. The review shows CHWs as paraprofessionals or lay individuals with an in-depth understanding of the community culture and language, have received standardised job-related training of a shorter duration than health professionals, and their primary goal is to provide culturally appropriate health services to the community. CHWs can be categorised into three groups by education and pre-service training. These are lay health workers (individuals with little or no formal education who undergo a few days to a few weeks of informal training), level 1 paraprofessionals (individuals with some form of secondary education and subsequent informal training), and level 2 paraprofessionals (individuals with some form of secondary education and subsequent formal training lasting a few months to more than a year). Lay health workers tend to provide basic health services as unpaid volunteers while level 1 paraprofessionals often receive an allowance and level 2 paraprofessionals tend to be salaried.
Conclusions: This review provides a categorisation of CHWs that may be useful for health policy formulation, programme planning, and research.
Community health workers (CHWs) have been identified as a critical bridge to reaching many communities with essential health services based on their social and geographical proximity to community ...residents. However, various challenges limit their performance, especially in low-and middle-income countries. With the view to guiding global and local stakeholders on how best to support CHWs, this study explored common challenges of different CHW cadres in various contexts. We conducted 36 focus group discussions and 131 key informant interviews in Bangladesh, India, Kenya, Malawi, and Nigeria. The study covered 10 CHW cadres grouped into Level 1 and Level 2 health paraprofessionals based on education and training duration, with the latter having a longer engagement. Data were analysed using thematic analysis. We identified three critical challenges of CHWs. First, inadequate knowledge affected service delivery and raised questions about the quality of CHW services. CHWs' insufficient knowledge was partly explained by inadequate training opportunities and the inability to apply new knowledge due to equipment unavailability. Second, their capacity for service coverage was limited by a low level of infrastructural support, including lack of accommodation for Level 2 paraprofessional CHWs, inadequate supplies, and lack of transportation facilities to convey women in labour. Third, the social dimension relating to the acceptance of CHWs' services was not guaranteed due to local socio-cultural beliefs, CHW demographic characteristics such as sex, and time conflict between CHWs' health activities and community members' daily routines. To optimise the performance of CHWs in LMICs, pertinent stakeholders, including from the public and third sectors, require a holistic approach that addresses health system challenges relating to training and structural support while meaningfully engaging the community to implement social interventions that enhance acceptance of CHWs and their services.
Background Community health workers (CHWs) have been identified as a critical bridge to reaching many communities with essential health services based on their social and geographical proximity to ...community residents. However, various challenges limit their performance, especially in low-and middle-income countries. With the view to guiding global and local stakeholders on how best to support CHWs, this study explored common challenges of different CHW cadres in various contexts. Methods We conducted 36 focus group discussions and 131 key informant interviews in Bangladesh, India, Kenya, Malawi, and Nigeria. The study covered 10 CHW cadres grouped into Level 1 and Level 2 health paraprofessionals based on education and training duration, with the latter having a longer engagement. Data were analysed using thematic analysis. Results We identified three critical challenges of CHWs. First, inadequate knowledge affected service delivery and raised questions about the quality of CHW services. CHWs’ insufficient knowledge was partly explained by inadequate training opportunities and the inability to apply new knowledge due to equipment unavailability. Second, their capacity for service coverage was limited by a low level of infrastructural support, including lack of accommodation for Level 2 paraprofessional CHWs, inadequate supplies, and lack of transportation facilities to convey women in labour. Third, the social dimension relating to the acceptance of CHWs’ services was not guaranteed due to local socio-cultural beliefs, CHW demographic characteristics such as sex, and time conflict between CHWs’ health activities and community members’ daily routines. Conclusion To optimise the performance of CHWs in LMICs, pertinent stakeholders, including from the public and third sectors, require a holistic approach that addresses health system challenges relating to training and structural support while meaningfully engaging the community to implement social interventions that enhance acceptance of CHWs and their services.
Introduction
An estimated 2.6 million stillbirths occur worldwide each year. A standardized classification system setting out possible cause of death and contributing factors is useful to help obtain ...comparative data across different settings. We undertook a systematic review of stillbirth classification systems to highlight their strengths and weaknesses for practitioners and policymakers.
Material and methods
We conducted a systematic search and review of the literature to identify the classification systems used to aggregate information for stillbirth and perinatal deaths. Narrative synthesis was used to compare the range and depth of information required to apply the systems, and the different categories provided for cause of and factors contributing to stillbirth.
Results
A total of 118 documents were screened; 31 classification systems were included, of which six were designed specifically for stillbirth, 14 for perinatal death, three systems included neonatal deaths and two included infant deaths. Most (27/31) were developed in and first tested using data obtained from high‐income settings. All systems required information from clinical records. One‐third of the classification systems (11/31) included information obtained from histology or autopsy. The percentage where cause of death remained unknown ranged from 0.39% using the Nordic‐Baltic classification to 46.4% using the Keeling system.
Conclusion
Over time, classification systems have become more complex. The success of application is dependent on the availability of detailed clinical information and laboratory investigations. Systems that adopt a layered approach allow for classification of cause of death to a broad as well as to a more detailed level.
Australia is a wealthy developed country. However, there are significant disparities in health outcomes for Aboriginal infants compared with other Australian infants. Health outcomes tend to be worse ...for those living in remote areas. Little is known about the health service utilisation patterns of remote dwelling Aboriginal infants. This study describes health service utilisation patterns at the primary and referral level by remote dwelling Aboriginal infants from northern Australia.
Data on 413 infants were analysed. Following birth, one third of infants were admitted to the regional hospital neonatal nursery, primarily for preterm birth. Once home, most (98%) health service utilisation occurred at the remote primary health centre, infants presented to the centre about once a fortnight (mean 28 presentations per year, 95%CI 26.4-30.0). Half of the presentations were for new problems, most commonly for respiratory, skin and gastrointestinal symptoms. Remaining presentations were for reviews or routine health service provision. By one year of age 59% of infants were admitted to hospital at least once, the rate of hospitalisation per infant year was 1.1 (95%CI 0.9-1.2).
The hospitalisation rate is high and admissions commence early in life, visits to the remote primary health centre are frequent. Half of all presentations are for new problems. These findings have important implications for health service planning and delivery to remote dwelling Aboriginal families.
As key stakeholders continue to affirm the relevance of community health workers (CHWs) in universal health coverage, there is a need for a commensurate focus on their motivation and job satisfaction ...especially in low- and middle-income countries (LMICs) where they play prominent roles. Despite the wealth of literature on motivation and job satisfaction, many studies draw on research conducted in high-income settings. This study explored factors influencing motivation and satisfaction among CHWs in LMICs. Thirty-two focus group discussions and 116 key informant interviews were conducted with CHWs, programme staff, health professionals and community leaders in Bangladesh, India, Kenya, Malawi and Nigeria. Data were analysed using thematic analysis. Overall, CHWs desired: (1) CHW programmes with manageable workload; work schedules that address concerns of female CHWs on work-life balance; clear career pathway; and a timely, regular and sustainable remuneration. However, no remuneration type guaranteed satisfaction because of an insatiable quest for additional financial reward. (2) Relationship with stakeholders that enhances their reputation. This was more important for unsalaried CHWs. (3) Opportunities to support community members. This was popular among all cadres as it resonated with their altruistic values. This study provides insights for developing a 'comprehensive motivation package' for CHWs.
Background
Disparities exist in pregnancy and birth outcomes between Australian Aboriginal women and their non‐Aboriginal counterparts. Understanding patterns of health service use by Aboriginal ...women is critical. This study describes the use of maternal health services by remote dwelling Aboriginal women in northern Australia during pregnancy, birth and the postpartum period and their burden of disease.
Methods
A retrospective cohort study of maternity care for all 412 maternity cases from two remote Aboriginal communities in the Northern Territory of Australia, 2004–2006. Primary endpoints were the number and type of maternal health‐related complications and service episodes at the health centers and regional hospital during pregnancy, birth, and the first 6 months postpartum.
Results
Ninety‐three percent of women attended antenatal care. This often commenced late in pregnancy. High levels of complications were identified and 23 percent of all women required antenatal hospitalization. Birth occurred within the regional hospital for 90 percent of women. By 6 months postpartum, 45 percent of women had documented postnatal morbidities and 8 percent required hospital admission. The majority of women accessed remote health services at least once; however, only one third had a record of a postnatal care within 2 months of giving birth.
Conclusion
Maternal health outcomes were poor despite frequent service use throughout pregnancy, birth, and the first 6 months postpartum suggesting quality of care rather than access issues. These findings reflect outcomes that are more aligned with the developing rather than developed world and have significant implications for future planning of maternity services that must be urgently addressed.
Every year, an estimated 2.6 million stillbirths occur worldwide, with up to 98% occurring in low- and middle-income countries (LMIC). There is a paucity of primary data on cause of stillbirth from ...LMIC, and particularly from sub-Saharan Africa to inform effective interventions. This study aimed to identify the cause of stillbirths in low- and middle-income settings and compare methods of assessment.
This was a prospective, observational study in 12 hospitals in Kenya, Malawi, Sierra Leone and Zimbabwe. Stillbirths (28 weeks or more) were reviewed to assign the cause of death by healthcare providers, an expert panel and by using computer-based algorithms. Agreement between the three methods was compared using Kappa (κ) analysis. Cause of stillbirth and level of agreement between the methods used to assign cause of death.
One thousand five hundred sixty-three stillbirths were studied. The stillbirth rate (per 1000 births) was 20.3 in Malawi, 34.7 in Zimbabwe, 38.8 in Kenya and 118.1 in Sierra Leone. Half (50.7%) of all stillbirths occurred during the intrapartum period. Cause of death (range) overall varied by method of assessment and included: asphyxia (18.5-37.4%), placental disorders (8.4-15.1%), maternal hypertensive disorders (5.1-13.6%), infections (4.3-9.0%), cord problems (3.3-6.5%), and ruptured uterus due to obstructed labour (2.6-6.1%). Cause of stillbirth was unknown in 17.9-26.0% of cases. Moderate agreement was observed for cause of stillbirth as assigned by the expert panel and by hospital-based healthcare providers who conducted perinatal death review (κ = 0.69; p < 0.0005). There was only minimal agreement between expert panel review or healthcare provider review and computer-based algorithms (κ = 0.34; 0.31 respectively p < 0.0005).
For the majority of stillbirths, an underlying likely cause of death could be determined despite limited diagnostic capacity. In these settings, more diagnostic information is, however, needed to establish a more specific cause of death for the majority of stillbirths. Existing computer-based algorithms used to assign cause of death require revision.
The third global State of the World's Midwifery report (SoWMy 2021) provides an updated evidence base on the sexual, reproductive, maternal, newborn and adolescent health (SRMNAH) workforce. For the ...first time, SoWMy includes high-income countries (HICs) as well as low- and middle-income countries. This paper describes the similarities and differences between regions and income groups, and discusses the policy implications of these variations. SoWMy 2021 estimates a global shortage of 900,000 midwives, which is particularly acute in low-income countries (LICs) and in Africa. The shortage is projected to improve only slightly by 2030 unless additional investments are made. The evidence suggests that these investments would yield important returns, including: more positive birth experiences, improved health outcomes, and inclusive and equitable economic growth. Most HICs have sufficient SRMNAH workers to meet the need for essential interventions, and their education and regulatory environments tend to be strong. Upper-middle-income countries also tend to have strong policy environments. LICs and lower-middle-income countries tend to have a broader scope of practice for midwives, and many also have midwives in leadership positions within national government. Key regional variations include: major midwife shortages in Africa and South-East Asia but more promising signs of growth in South-East Asia than in Africa; a strong focus in Africa on professional midwives (rather than associate professionals: the norm in many South-East Asian countries); heavy reliance on medical doctors rather than midwives in the Americas and Eastern Mediterranean regions and parts of the Western Pacific; and a strong educational and regulatory environment in Europe but a lack of midwife leaders at national level. SoWMy 2021 provides stakeholders with the latest data and information to inform their efforts to build back better and fairer after COVID-19. This paper provides a number of policy responses to SoWMy 2021 that are tailored to different contexts, and suggests a variety of issues to consider in these contexts. These suggestions are supported by the inclusion of all countries in the report, because it is clear which countries have strong SRMNAH workforces and enabling environments and can be viewed as exemplars within regions and income groups.