Bioluminescent Escherichia Coli Strains For The Quantitative Detection Of Phosphate And Ammonia In Coastal And Suburban Watersheds

Accumulation of phosphate and ammonia in estuarine systems and subsequent dinoflagellate and algal blooms has been implicated in fish kills and in health risks for fishermen. Analytic chemistry kits are used to measure phosphate and ammonia levels in water samples, but their sensitivity is limited due to specificity for inorganic forms of these moieties. An Escherichia coli bioluminescent reporter system measured the bioavailability of inorganic nutrients through fusion of E. coli promoters (phoA or glnAp2) to the luxCDABE operon of Vibrio fischeri carried either on the chromosome or on a multicopy plasmid vector, resulting in emission of light in response to phosphate or ammonia starvation. Responses were shown to be under the control of expected physiological regulators, phoB and glnFG, respectively. Standard curves were used to determine the phosphate and ammonia levels in water samples from diverse watersheds located in the northeastern United States. Bioluminescence produced in response to nutrient starvation correlated with concentrations of phosphate (1-24 ppm) and ammonia (0.1-1.6 ppm). While the ammonia biosensor measured nutrient concentrations in tested water samples that were comparable to the amounts reported by a commercial kit, the phosphate biosensor reported higher levels of phosphate in Chesapeake water samples than did the kit

Quality of sick child care delivered by Health Surveillance Assistants in Malawi

Objective To assess the quality of care provided by Health Surveillance Assistants (HSAs)—a cadre of community-based health workers—as part of a national scale-up of community case management of childhood illness (CCM) in Malawi. Methods Trained research teams visited a random sample of HSAs (n = 131) trained in CCM and provided with initial essential drug stocks in six districts, and observed the provision of sick child care. Trained clinicians conducted ‘gold-standard' reassessments of the child. Members of the survey team also interviewed caregivers and HSAs and inspected drug stocks and patient registers. Findings HSAs provided correct treatment with antimalarials to 79% of the 241 children presenting with uncomplicated fever, with oral rehydration salts to 69% of the 93 children presenting with uncomplicated diarrhoea and with antibiotics to 52% of 58 children presenting with suspected pneumonia (cough with fast breathing). About one in five children (18%) presented with danger signs. HSAs correctly assessed 37% of children for four danger signs by conducting a physical exam, and correctly referred 55% of children with danger signs. Conclusion Malawi's CCM programme is a promising strategy for increasing coverage of sick child treatment, although there is much room for improvement, especially in the correct assessment and treatment of suspected pneumonia and the identification and referral of sick children with danger signs. However, HSAs provided sick child care at levels of quality similar to those provided in first-level health facilities in Malawi, and quality should improve if the Ministry of Health and partners act on the results of this assessmen

Explorando manifestaciones de auto-compasión en usuarios regulares de Ayahuasca, miembros de la Iglesia del Santo Daime de Chile

Memoria para optar al título de PsicólogaEl objetivo de esta investigación apunta a explorar las manifestaciones de la autocompasión en usuarios regulares de Ayahuasca, miembros de la Iglesia del santo Daime de Chile. Su importancia radica en que la auto-compasión es un tema reciente, con escasas investigaciones cualitativas. A su vez, en Chile los miembros de la Iglesia del Santo Daime han sido una población que presenta sólo una investigación, que es de metodología cuantitativa, y es importante estudiar a consumidores regulares de Ayahuasca en Chile, para entender las implicancias de la toma de este brebaje. este estudio corresponde a una investigación cualitativa, en la cual se realizaron entrevistas semi-estructuradas a 8 participantes de la Iglesia en Chile, las cuales fueron anazalidas a través de la codificación abierta de la Teoría Fundamentada. los resultados del análisis indican que la participación de la Iglesia, incluyendo la toma regular de Ayahuasca, podría tener efectos en mayores manifestaciones de auto-compasió

Progress on norovirus vaccine research: public health considerations and future directions

Introduction: Noroviruses are the leading cause of foodborne illness worldwide, account for approximately one-fifth of acute gastroenteritis (AGE) cases globally, and cause a substantial economic burden. Candidate norovirus vaccines are in development, but there is currently no licensed vaccine. Areas covered: Noroviruses cause approximately 684 million cases and 212,000 deaths per year across all age groups, though burden estimates vary by study and region. Challenges to vaccine research include substantial and rapidly evolving genetic diversity, short-term and homotypic immunity to infection, and the absence of a single, well-established correlate of protection. Nonetheless, several norovirus vaccine candidates are currently in development, utilizing virus-like particles (VLPs), P particles, and recombinant adenoviruses. Of these, a bivalent GI.1/GII.4 VLP-based intramuscular vaccine (Phase IIb) and GI.1 oral vaccine (Phase I) are in clinical trials. Expert Commentary: A norovirus vaccine should target high-risk populations, including the young and the elderly, and protect them against the most common circulating norovirus strains. A norovirus vaccine would be a powerful tool in the prevention and control of norovirus while lessening the burden of AGE worldwide. However, more robust burden and cost estimates are needed to justify investments in and guide norovirus vaccine development

Health systems supports for community case management of childhood illness: Lessons from an assessment of early implementation in Malawi

Background: National community-based health worker (CBHW) programs often face challenges in ensuring that these remote workers are adequately trained, equipped and supervised. As governments increasingly deploy CBHWs to improve access to primary health care, there is an urgent need to assess how well health systems are supporting CBHWs to provide high quality care. Methods. This paper presents the results of a mixed-methods assessment of selected health systems supports (supervision, drug supply, and job aids) for a national community case management (CCM) program for childhood illness in Malawi during the first year of implementation. We collected data on the types and levels of drug supply and supervision through a cross-sectional survey of a random sample of Health Surveillance Assistants (HSAs) providing CCM services in six districts. We then conducted in-depth interviews and focus group discussions with program managers and HSAs, respectively, to gain an understanding of the barriers and facilitating factors for delivering health systems supports for CCM. Results: Although the CCM training and job aid were well received by stakeholders, HSAs who participated in the first CCM training sessions often waited up to 4 months before receiving their initial supply of drugs and first supervision visits. One year after training began, 69% of HSAs had all essential CCM drugs in stock and only 38% of HSAs reported a CCM supervision visit in the 3 months prior to the survey. Results of the qualitative assessment indicated that drug supply was constrained by travel distance and stock outs at health facilities, and that the initial supervision system relied on clinicians who were able to spend only limited time away from clinical duties. Proactive district managers trained and enrolled HSAs\u27 routine supervisors to provide CCM supervision. Conclusions: Malawi\u27s CCM program is promising, but health systems supports must be improved to ensure consistent coverage and quality. Mixed-methods implementation research provided the Ministry of Health with actionable feedback that it is using to adapt program policies and improve performance. © 2013 Callaghan-Koru et al.; licensee BioMed Central Ltd

Adapting the Surveillance Platform for Enteric and Respiratory Infectious Organisms at United States Veterans Affairs Medical Centers (SUPERNOVA) for COVID-19 Among Hospitalized Adults: Surveillance Protocol

Introduction: Early in the COVID-19 pandemic, the Centers for Disease Control and Prevention (CDC) rapidly initiated COVID-19 surveillance by leveraging existing hospital networks to assess disease burden among hospitalized inpatients and inform prevention efforts. Materials and Methods: The Surveillance Platform for Enteric and Respiratory Infectious Organisms at Veterans Affairs Medical Centers (SUPERNOVA) is a network of five United States Veterans Affairs Medical Centers which serves nearly 400,000 Veterans annually and conducts laboratory-based passive and active monitoring for pathogens associated with acute gastroenteritis and acute respiratory illness among hospitalized Veterans. This paper presents surveillance methods for adapting the SUPERNOVA surveillance platform to prospectively evaluate COVID-19 epidemiology during a public health emergency, including detecting, characterizing, and monitoring patients with and without COVID-19 beginning in March 2020. To allow for case-control analyses, patients with COVID-19 and patients with non-COVID-19 acute respiratory illness were included. Results: SUPERNOVA included 1,235 participants with COVID-19 and 707 participants with other acute respiratory illnesses hospitalized during February through December 2020. Most participants were male (93.1%), with a median age of 70 years, and 45.8% non-Hispanic Black and 32.6% non-Hispanic White. Among those with COVID-19, 28.2% were transferred to an intensive care unit, 9.4% received invasive mechanical ventilation, and 13.9% died. Compared with controls, after adjusting for age, sex, and race/ethnicity, COVID-19 case-patients had significantly higher risk of mortality, respiratory failure, and invasive mechanical ventilation, and longer hospital stays. Discussion: Strengths of the SUPERNOVA platform for COVID-19 surveillance include the ability to collect and integrate multiple types of data, including clinical and illness outcome information, and SARS-CoV-2 laboratory test results from respiratory and serum specimens. Analysis of data from this platform also enables formal comparisons of participants with and without COVID-19. Surveillance data collected during a public health emergency from this key U.S. population of Veterans will be useful for epidemiologic investigations of COVID-19 spectrum of disease, underlying medical conditions, virus variants, and vaccine effectiveness, according to public health priorities and needs

Measles immunity among pregnant women aged 15–44 years in Namibia, 2008 and 2010

Background: Namibia experienced a large measles outbreak starting in 2009, with 38% of reported cases in adults, including women of reproductive age. Population immunity was assessed among pregnant women to determine whether immunization activities were needed in adults to achieve measles elimination in Namibia. Methods: A total of 1708 and 2040 specimens sampled from Namibian pregnant women aged 15–44 years who were included in the 2008 and 2010 National HIV Sentinel Survey, respectively, were tested for measles immunoglobulin G antibody. The proportion of women seropositive overall and by 5-year age strata was determined, and factors associated with seropositivity were analyzed by logistic regression, including age, facility type, gravidity, HIV status, and urban/rural setting. Seropositivity in 2008 versus 2010 was compared. Results: In both analysis years, measles seropositivity was lower in 15–19-year-olds (77%) and 20–24-year-olds (85–87%) and higher in 25–44-year-olds (90–94%) (2008, p < 0.001; 2010, p < 0.001). Overall measles seropositivity did not differ between 2008 (87%) and 2010 (87%) (p = 0.7). HIV status did not affect seropositivity. Conclusions: Late in a large measles outbreak, 13% of pregnant women in Namibia, and almost one in four 15–19-year-old pregnant women, remained susceptible to measles. In Namibia, immunization campaigns with measles-containing vaccine should be considered for adults

Trends in Incidence of Norovirus-associated Acute Gastroenteritis in 4 Veterans Affairs Medical Center Populations in the United States, 2011-2015.

BACKGROUND: Norovirus is an important cause of epidemic acute gastroenteritis (AGE), yet the burden of endemic disease in adults has not been well documented. We estimated the prevalence and incidence of outpatient and community-acquired inpatient norovirus AGE at 4 Veterans Affairs Medical Centers (VAMC) (Atlanta, Georgia; Bronx, New York; Houston, Texas; and Los Angeles, California) and examined trends over 4 surveillance years. METHODS: From November 2011 to September 2015, stool specimens collected within 7 days of AGE symptom onset for clinician-requested diagnostic testing were tested for norovirus, and positive samples were genotyped. Incidence was calculated by multiplying norovirus prevalence among tested specimens by AGE-coded outpatient encounters and inpatient discharges, and dividing by the number of unique patients served. RESULTS: Of 1603 stool specimens, 6% tested were positive for norovirus; GII.4 viruses (GII.4 New Orleans [17%] and GII.4 Sydney [47%]) were the most common genotypes. Overall prevalence and outpatient and inpatient community-acquired incidence followed a seasonal pattern, with higher median rates during November-April (9.2%, 376/100 000, and 45/100 000, respectively) compared to May-October (3.0%, 131/100 000, and 13/100 000, respectively). An alternate-year pattern was also detected, with highest peak prevalence and outpatient and inpatient community-acquired norovirus incidence rates in the first and third years of surveillance (14%-25%, 349-613/100 000, and 43-46/100 000, respectively). CONCLUSIONS: This multiyear analysis of laboratory-confirmed AGE surveillance from 4 VAMCs demonstrates dynamic intra- and interannual variability in prevalence and incidence of outpatient and inpatient community-acquired norovirus in US Veterans, highlighting the burden of norovirus disease in this adult population

Rubella immunity among pregnant women aged 15–44 years, Namibia, 2010

Background: The level of rubella susceptibility among women of reproductive age in Namibia is unknown. Documenting the risk of rubella will help estimate the potential burden of disease in Namibian women and the risk of congenital rubella syndrome (CRS) in infants, and will guide strategies for the introduction of rubella vaccine. Methods: A total of 2044 serum samples from pregnant Namibian women aged 15–44 years were tested for rubella immunoglobulin G antibody; the samples were obtained during the 2010 National HIV Sentinel Survey. The proportion of women seropositive for rubella was determined by 5-year age strata, and factors associated with seropositivity were analyzed by logistic regression, including age, gravidity, HIV status, facility type, and urban/rural status. Results: Overall rubella seroprevalence was 85% (95% confidence interval (CI) 83–86%). Seroprevalence varied by age group (83–90%) and health district (71–100%). In the multivariable model, women from urban residences had higher odds of seropositivity as compared to women from rural residences (odds ratio 1.40, 95% CI 1.09–1.81). Conclusions: In the absence of a routine rubella immunization program, the high level of rubella seropositivity suggests rubella virus transmission in Namibia, yet 15% of pregnant Namibian women remain susceptible to rubella. The introduction of rubella vaccine will help reduce the risk of rubella in pregnant women and CRS in infants