Examining the unique impacts of Potentially Traumatic Experiences (PTE) and discrimination events on Post-Traumatic Stress Disorder (PTSD) and suicidal thoughts and behaviors among Multiracial/ethnic adults in the United States.

BACKGROUND: Suicide and PTSD are pressing public health issues in the US, with discrimination and potentially traumatic experiences (PTEs) influencing mental health. However, the unique effects of these factors on Multiracial/ethnic adults' PTSD and suicidal thoughts/behaviors (STB) are not thoroughly researched. METHODS: Using a cross-sectional design, an online survey was conducted (N = 1012) from October to December 2022. Multivariable logistic regression models analyzed relationships between PTEs, discriminatory events, and mental health outcomes, accounting for sociodemographics. RESULTS: After adjusting for demographics, exposure to PTEs and discrimination correlated with heightened odds of PTSD and STB. Individual lifetime discrimination experiences and specific PTEs demonstrated varying associations with STB and PTSD. The study underscores discrimination's relevance as a risk factor. LIMITATIONS: The study's cross-sectional nature restricts causality or temporality interpretations. Moreover, the convenience sample of English-speaking online participants might not be reflective of all Multiracial/ethnic US adults. CONCLUSIONS: Findings underscore PTEs and discrimination's interconnectedness in Multiracial/ethnic mental health outcomes. Discrimination might pose similar risks to PTEs. Acknowledging discrimination as potential precursors for PTSD and STB aids accurate diagnosis and effective treatment planning. Incorporating racial/ethnic discrimination and traumatic experiences into PTSD conceptualization and assessment is pivotal. This knowledge informs tailored interventions and mental health education for this population.

Suicidality by Sexual Identity and Correlates Among American Indian and Alaska Native High School Students.

PURPOSE: This study aims to determine the prevalence of suicidality among American Indian and Alaskan Native (AI/AN) adolescents. Additionally, we measured suicidality, stratified by sex, and its association with sexual identity, sexual violence, and binge drinking. METHODS: We pooled data from the Youth Risk Behavior Survey from 2005 to 2019 to analyze the prevalence of sexual minorities, forced sex, and binge drinking, and their association with suicidality using basic descriptive statistics followed by adjusted odds ratios stratified by sex among AI/AN youth. RESULTS: 19% of AI/AN participants reported having suicidal thoughts and 14% reported having a previous suicide attempt. More than 17% of AI/AN participants identified as sexual minority youth (SMY). Compared to AI/AN heterosexual youth, AI/AN bisexual youth had significantly higher odds of reporting suicidal thoughts (aOR = 16.01), planning (aOR = 12.4), and previous attempts (aOR = 7.73). This pattern was also significantly demonstrated for AI/AN gay/lesbian youth. 43% of all AI/AN participants reported being forced into sexual intercourse. The presence of binge drinking was associated with higher odds of suicidal thoughts for both females and males compared to those who did not binge drink. DISCUSSION: At the intersection of multiple marginalization, AI/AN SMY have a high mental health burden, demonstrating the need for culturally informed, community-led, and targeted mental health support focused on SMY AI/AN. Though this study fails to capture the heterogeneity within the AI/AN community, as nuances exist at the tribal level, these results demonstrate work needs to be done to support the health burden that AI/AN youth carry.

Application of magnetic-nanoparticle functionalized whole-cell biosensor array for bioavailability and ecotoxicity estimation at urban contaminated sites.

The bioavailability and ecotoxicity of pollutants are important for urban ecological systems and human health, particularly at contaminated urban sites. Therefore, whole-cell bioreporters are used in many studies to assess the risks of priority chemicals; however, their application is restricted by low throughput for specific compounds and complicated operations for field tests. In this study, an assembly technology for manufacturing Acinetobacter-based biosensor arrays using magnetic nanoparticle functionalization was developed to solve this problem. The bioreporter cells maintained high viability, sensitivity, and specificity in sensing 28 priority chemicals, seven heavy metals, and seven inorganic compounds in a high-throughput manner, and their performance remained acceptable for at least 20 d. We also tested the performance by assessing 22 real environmental soil samples from urban areas in China, and our results showed positive correlations between the biosensor estimation and chemical analysis. Our findings prove the feasibility of the magnetic nanoparticle-functionalized biosensor array to recognize the types and toxicities of multiple contaminants for online environmental monitoring at contaminated sites.

Non-medical prescription opioid use among high school students in 38 U.S. States.

Background: Lifetime prevalence of non-medical prescription opioid use (NMPOU) among adolescents exceeds 10%. Building on that work, we estimate lifetime and recent (i.e., past 30-day) NMPOU and examine associations with alcohol and cannabis use. Methods: We used 2019 YRBS data from 38 states with a question on lifetime NMPOU (n = 151,910), a subsample of 8 states also inquired about recent NMPOU (n = 28,439). We estimated the prevalence and frequency of NMPOU for boys and girls in each state. Multivariable logistic regression was used to derive odds ratios (OR) and 95% confidence intervals (CIs) representing recent NMPOU in association with alcohol and cannabis use adjusting for state, race/ethnicity, and grade. Results: The prevalence of lifetime NMPOU ranged from 9.4% to 22.7% for girls and 8.6% to 23.2% for boys; significant sex difference in Florida. Recent NMPOU among lifetime users ranged from 33.0% to 50.7% for girls and 40.7% to 52.3% for boys, no significant sex differences. Students reporting recent NMPOU had significantly higher odds of recent alcohol (OR: 5.1, 95% CI: 4.3-6.1) and cannabis use (OR: 3.7, 95% CI: 2.8-4.8). Higher frequency (1-2 and ≥ 3 times vs. 0 times) of NMPOU had significantly greater odds of alcohol (3-9-fold) and cannabis use (3-5-fold). The magnitude of association was higher for boys compared to girls. Conclusion: The prevalence of recent NMPOU among lifetime users is high and is associated with alcohol and cannabis use. NMPOU can be a steppingstone towards other forms of opioid use therefore, opioid prevention programs should emphasize prescription drug misuse and consider socio-contextual and geographical variations.

Online detection of alkanes by a biological-phase microextraction and biosensing (BPME-BS) device.

Oil spill incidents occur frequently and threaten ecosystems and human health. Solid-phase microextraction allows direct alkane extraction from environmental matrices to improve the limit of detection but is unable to measure alkanes on site. A biological-phase microextraction and biosensing (BPME-BS) device was developed by immobilising an alkane chemotactic Acinetobacter bioreporter ADPWH_alk in agarose gel to achieve online alkane quantification with the aid of a photomultiplier. The BPME-BS device had a high enrichment factor (average 7.07) and a satisfactory limit of detection (0.075 mg/L) for alkanes. The quantification range was 0.1-100 mg/L, comparable to a gas chromatography flame ionisation detector and better than a bioreporter without immobilisation. ADPWH_alk cells in the BPME-BS device maintained good sensitivity under a wide range of environmental conditions, including pH (4.0-9.0), temperature (20-40 °C), and salinity (0.0-3.0%), and its response remained stable within 30 days at 4 °C. In a 7-day continual measurement, the BPME-BS device successfully visualised the dynamic concentration of alkanes, and a 7-day field test successfully captured an oil spill event, helping in source apportionment and on-scene law enforcement. Our work proved that the BPME-BS device is a powerful tool for online alkane measurement, showing substantial potential for fast detection and rapid response to oil spills on site and in situ.

Instability in Housing and Medical Care Access: The Inequitable Impacts of the COVID-19 Pandemic on U.S. Transgender Populations.

Purpose: To assess whether the COVID-19 pandemic has inequitably impacted key social determinants of health (SDoH), specifically employment, housing, and health care, for U.S. transgender populations. Methods: Between April 13, 2020 and August 3, 2020, we conducted a national, cross-sectional online survey of sexual and gender minority individuals (N=870). We used logistic regression to calculate both unadjusted and adjusted odds of unemployment, homelessness/housing instability, and interruptions in medical care owing to the pandemic by gender and gender modality. Adjusted models controlled for age, race/ethnicity, and region. Results: In adjusted models, transgender and gender diverse people had 2.12 times the odds of reporting homelessness/housing instability and 2.88 times the odds of reporting medical care interruptions compared with cisgender peers. Transgender men, women, and nonbinary people had 4.12, 3.29, and 3.48 times the adjusted odds of interruptions in medical care compared with cisgender men, respectively. We did not observe significant differences in employment. Conclusions: Findings add empirical support to the hypothesis that socioeconomic consequences of COVID-19 are inequitably impacting transgender people. To contextualize our results and support future research in this area, we present a conceptual model of the short- and long-term impacts of COVID-19 on transgender populations using a framework of stigma as a fundamental cause of health inequities. Our findings emphasize that public health professionals must urgently consider-and intervene to address-the pandemic's SDoH-related impacts on transgender populations.

Trends in heroin use and injection drug use among high school students in five urban school districts in the US (2005-2017).

Background. We describe the prevalence of and changes in heroin use and injection drug use (IDU) among high school students in five large, urban school districts in the US (2005-2017); nearly three-fourths of the students were Black and/or Hispanic/Latino.Methods. Data are from the Centers for Disease Control and Prevention's "Youth Risk Behavior Survey" program, which includes biennial surveys in urban school districts. We pooled data across districts and survey years, and then generated weighted prevalence estimates (and 95% CIs) for any lifetime heroin use and IDU. Joinpoint regression modeling was used to estimate changes in prevalence over the study period.Results. Biennial prevalence estimates (2005-2017) for heroin use and IDU were above 1.8% for all seven timepoints. In 2017, prevalence of heroin use and IDU were 2.9% and 2.5%, respectively. Both heroin use and IDU were higher among boys than girls. There were statistically significant increases in heroin use and IDU among girls from 2005-2009, whereas changes over time were stable among boys.Conclusions. High school students in large, urban school districts may have higher rates of heroin use and IDU than US high school students in general, and there is little evidence of increases since 2009. This study suggests that adolescence may be a critical period for initiation of heroin use among adolescents in large urban school districts, the majority of whom are Black and/or Latino.Supplemental data for this article is available online at https://doi.org/10.1080/15332640.2021.1992327 .

Disparities in HIV Testing, Condom Use, and HIV Education Between Transgender and Not Transgender High School-Aged Youth: Findings From the 2019 Youth Risk Behavior Survey.

Transgender individuals are disproportionately affected by HIV in the United States. Given increased risk of HIV among youth, there is a need to understand HIV risk and protective factors among transgender individuals who are 18 years and younger. Patterns of HIV testing, HIV education, and condom use have known associations with HIV outcomes among youth in general, but are understudied among transgender youth. This study assessed these outcomes by developing a series of sex-stratified multivariable logistic regression models using pooled Youth Risk Behavior Survey data. Results indicate female and male transgender youth as well as males who were not sure they were transgender were more likely have tested for HIV compared with their not transgender peers. Male transgender youth were significantly less likely to have received HIV education compared with not transgender males. Females not sure if they were transgender and male transgender youth were significantly less likely to have used condoms compared with, respectively, not transgender female and not transgender male counterparts. In sum, condom use and HIV education both remain lower among transgender individuals relative to their not-transgender peers. This highlights the need for the promotion of culturally appropriate HIV education and HIV prevention supports among transgender youth.

"We don't have a template to follow": Sexual identity development and its facilitative factors among sexual minority men in the context of China.

Extant research on sexual identity development among sexual minority individuals has been predominantly conducted in Western contexts and focused on factors that hinder identity development processes. Using thematic analysis, this qualitative study sought to explore the experiences of sexual identity development among Chinese sexual minority men as well as the facilitative factors in China that positively influence this developmental process. The sample comprised 24 participants who self-identified as Chinese sexual minority men. The analysis yielded five overarching themes: awareness of one's attraction and corresponding reactions, identity exploration, moving toward identity acceptance and commitment, acceptance and support from others, and environmental support. The first three themes described the processes of sexual identity development among Chinese sexual minority men, whereas the latter two themes centered on the related facilitative factors in the context of China. The results highlight the importance of understanding the identity development process within Chinese minority men's unique sociocultural contexts. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

Physical Inactivity and the Role of Bullying Among Gender Minority Youth Participating in the 2017 and 2019 Youth Risk Behavior Survey.

PURPOSE: Evidence from small-scale studies suggests that transgender youth are less physically active than nontransgender youth, putting them at risk for worse health outcomes. This study examined the relationship between gender modality and participation in physical activity, physical education (PE), and sports teams in a multistate sample of high school youth and assessed whether bullying impacted this relationship. METHODS: Multiple regression was used to analyze data from the state and local Youth Risk Behavior Survey from 2017 to 2019 to examine the relationship between the gender modality and participation in physical activity, PE, and sports teams. The sample was stratified by sex and adjusted for demographics and in-school and online bullying victimization. RESULTS: Transgender participants who reported a male or female sex, respectively, reported lower odds of physical activity (adjusted odds ratio [aOR] 0.46, p < .001; aOR 0.46, p < .001, respectively) but similar odds of PE participation. Female transgender students were less likely to participate in sports (aOR 0.55, p = .007); however, this relationship was not seen in adjusted models. Adjusting for demographics, male transgender students were significantly more likely to participate in sports (aOR 2.1, p = .002). Adjusting for bullying experiences did not significantly change these results. DISCUSSION: Transgender youth are less likely to participate in physical activity but participate similarly or more than cisgender peers in PE and sports. Factors other than bullying may limit physical activity among transgender youth, and the Youth Risk Behavior Survey may not capture experiences of trans-specific victimization. Increased inclusion and safety may help increase physical activity and amplify its benefits for transgender students.

Stronger susceptibilities to air pollutants of influenza A than B were identified in subtropical Shenzhen, China.

Air pollution was indicated to be a key factor contributing to the aggressive spread of influenza viruses, whereas uncertainty still exists regarding to whether distinctions exist between influenza subtypes. Our study quantified the impact of five air pollutants on influenza subtype outbreaks in Shenzhen, China, a densely populated and highly urbanized megacity. Daily influenza outbreak data of laboratory-confirmed positive cases were obtained from the Shenzhen CDC, from May 1, 2013 to Dec 31, 2015. Concentrations of nitrogen dioxide (NO2), sulfur dioxide (SO2), particulate matters ≤2.5 µm (PM2.5), particulate matters ≤10 µm (PM10), and ozone (O3), were retrieved from the 18 national monitoring stations. The generalized additive model (GAM) and distributed lag non-linear model (DLNM) were used to calculate the concentration-response relationships between environmental inducers and outbreak epidemics, respectively for influenza A (Flu-A) and B (Flu-B). There were 1687 positive specimens were confirmed during the study period. The cold season was restricted from Nov. 4th to Apr. 20th, covering all seasons other than the long-lasting summer. Relatively heavy fine particle matter (PM2.5) and NO2 pollution was observed in cold months, with mean concentrations of 46.06 µg/m3 and 40.03 µg/m3, respectively. Time-series analysis indicated that high concentrations of NO2, PM2.5, PM10, and O3 were associated with more influenza outbreaks at short lag periods (0-5 d). Although more Flu-B (679 cases) epidemics occurred than Flu-A (382 cases) in the cold season, Flu-A generally showed higher susceptibility to air pollutants. A 10 µg/m3 increment in concentrations of PM2.5, PM10, and O3 at lag 04, was associated with a 2.103 (95%CI: 1.528-2.893), 1.618 (95%CI: 1.311-1.996), and 1.569 (95%CI: 1.214-2.028) of the relative risk (RR) of Flu-A, respectively. A 5 µg/m3 increase in NO2 was associated with higher risk of Flu-A at lag 03 (RR = 1.646, 95%CI: 1.295-2.092) and of Flu-B at lag 04 (RR = 1.319, 95%CI: 1.095-1.588). Nevertheless, barely significant effect of particulate matters (PM2.5, PM10) on Flu-B and SO2 on both subtypes was detected. Further, the effect estimates of NO2 increased for both subtypes when coexisting with other pollutants. This study provides evidence that declining concentrations of main pollutants including NO2, O3, and particulate matters, could substantially decrease influenza risk in subtropical Shenzhen, especially for influenza A.

Mental health and Multiracial/ethnic adults in the United States: a mixed methods participatory action investigation.

Introduction: Addressing gaps in the integration of justice, diversity, equity, and inclusion (J-DEI) in public health research and practice, this study investigates the mental health of Multiracial and multiethnic adults in the United States (U.S.). A rapidly growing racial/ethnic group in the U.S., Multiracial and multiethnic populations are often excluded or underrepresented in standard public health research and practice, and little is known about their mental health or associated risk and protective factors. Methods: To investigate this knowledge gap, an electronic cross-sectional survey was conducted in two waves in 2022, pulling from various community sources, with 1,359 respondents in total. Complementing this, seventeen semi-structured interviews were performed with a subset of survey participants. Data were analyzed using a mix of statistical methods and staged hybrid inductive-deductive thematic analysis. Results: Findings indicate over half of the participants endorsed at least one mental health concern with prevalence of anxiety, depression, post-traumatic stress disorder, and suicidal thoughts and behaviors surpassing available national estimates. Exposure to trauma, discrimination, and microaggressions were found to play a significant role in these outcomes. Conversely, strong social support and strong ethnic identity emerged as protective factors. Qualitative insights brought forward the challenges faced by individuals in navigating bias and stigma, especially in the context of mental health care. Despite these barriers, emerging themes highlighted resilience, the importance of secure identity formation, and the critical role of community and cultural support. Conclusions: The marked prevalence of mental health concerns among Multiracial and multiethnic populations emphasizes the pressing need for tailored interventions and inclusive research methodologies. Recognizing and addressing the unique challenges faced by these communities is imperative in driving mental health equity in the U.S. The findings advocate for community-engaged practices, interdisciplinary collaborations, and the importance of addressing mental health challenges with cultural sensitivity, particularly in historically oppressed and marginalized groups. Future efforts must focus on refining these practices, ensuring that public health initiatives are genuinely inclusive and equitable.

The Effects of Paroxetine on Benthic Microbial Food Web and Nitrogen Transformation in River Sediments.

Paroxetine is a common pharmaceutical to treat depression and has been found to pose threats to aquatic organisms. However, little is known about the effects of paroxetine on the nutrient cycle in aquatic environments. Therefore, DNA metabarcoding is used in this study to analyze the effects of paroxetine on multi-trophic microorganisms and nitrogen transformation in river sediments. Although paroxetine has no significant effect on the diversity of microbenthos, changes in benthic nitrogen-converting bacteria are consistent with the change in the various forms of nitrogen in the sediment, indicating that paroxetine affects the nitrogen conversion process by affecting nitrogen-converting bacteria. In addition, it is found that paroxetine has the ability to influence nitrogen transformation in an indirect way by affecting the trophic transfer efficiency of higher trophic levels (meiofauna and protozoa, protozoa and protozoa), subsequently affecting the growth of nitrogen-converting bacteria through a top-down mechanism (i.e., predation).The results show that paroxetine affects nitrogen transformation directly by affecting nitrogen-converting bacteria and indirectly through top-down effects, emphasizing that the assessment of paroxetine's ecological risks should consider species within different trophic levels.

At-School Victimization and Alcohol Use Among Minoritized U.S. Youth, 2009-2017.

INTRODUCTION: Sexual minority and/or racial/ethnic minority youth may use alcohol at school as a form of minority stress-based coping. Polyvictimization is particularly prevalent among sexual minority and/or racial/ethnic minority youth and may be a useful proxy measure for minority stressors. METHODS: Data from local administrations of the Youth Risk Behavior Survey were pooled across 42 jurisdiction years (biennially, 2009-2017) and analyzed in 2022, resulting in a sample of 118,052 U.S. youth. The prevalence of alcohol use at school was examined by sexual identity, race/ethnicity, and their intersections, stratified by sex. Multivariable logistic regression models were built to examine the disparities in alcohol use at school and the impact of school-based polyvictimization. RESULTS: At the intersections of race/ethnicity and sexual identity, 25 of 30 sexual minority and/or racial/ethnic minority subpopulations had greater odds of alcohol use at school than their White heterosexual same-sex peers. Hispanic/Latinx not-sure males (AOR=9.15; 95% CI=5.97, 14.03) and Hispanic/Latinx lesbian females (AOR=11.24; 95% CI=6.40, 19.77) were most likely to report alcohol use at school. After adjusting for polyvictimization, the magnitude of association was attenuated for most sexual minority and/or racial/ethnic minority subpopulations; however, all but 2 significant associations remained. CONCLUSIONS: Sexual minority and/or racial/ethnic minority youth were more likely than White heterosexual peers to use alcohol at school, with the greatest odds among multiply marginalized and polyvictimized youth. Interventions should consider addressing more than school-based victimization alone because disparities persisted, although at a lower magnitude, after accounting for polyvictimization. Future longitudinal studies are warranted to further explore the associations between multiply marginalized identities, school-based polyvictimization, and alcohol use at school.

In-vitro toxicity assessment of Eucalyptus robusta Smith extracts via whole-cell bioreporter.

Eucalyptus is widely planted in China for wood industries, and there are increasing concerns about its ecotoxicity in the environment. This study explored the in-vitro toxicity of Eucalyptus extracts by assessing the impacts of water-soluble and dimethylsulfoxide (DMSO)-soluble fractions via a whole-cell bioreporter, Acinetobacter baylyi ADPWH_recA. Compounds identified in Eucalyptus extracts included one tannin, two phenolic acids, four terpenoids, four glycosides, and five flavonoids. The leaf extracts contained more biological-active components than barks and roots. Genotoxicity induced by Eucalyptus extracts was mainly associated with water extracts (e.g., flavonoids, phenolic acids) instead of DMSO extracts. The significant cytotoxicity was explained by programmed cell death (PCD), suggested by the results of propidium iodide (PI) and 2',7'-dichlorofluorescein-diacetate (DCFH-DA) assays. Generally, water-soluble fractions contributed more toxicities than DMSO-soluble fractions, particularly at high concentrations. A robust linear regression was built between the compromised toxicity and PCD index (Compromised toxicity = -2.192 × PCD index + 2.219; R2 = 0.8886), suggesting a PCD-dependent compromised toxicity which was greatly underestimated. Our results implied non-neglectable ecotoxicological risks of Eucalyptus extracts, hinting at the possible magnified ecological impacts of its large-scale plantation and the potential adverse outcomes to the surrounding ecosystems.

Sheet, Surveillance, Strategy, Salvage and Shield in global biodefense system to protect the public health and tackle the incoming pandemics.

The pandemic of COVID-19 challenges the global health system and raises our concerns on the next waves of other emerging infectious diseases. Considering the lessons from the failure of world's pandemic warning system against COVID-19, many scientists and politicians have mentioned different strategies to improve global biodefense system, among which Sheet, Surveillance, Strategy, Salvage and Shield (5S) are frequently discussed. Nevertheless, the current focus is mainly on the optimization and management of individual strategy, and there are limited attempts to combine the five strategies as an integral global biodefense system. Sheet represents the biosafety datasheet for biohazards in natural environment and human society, which helps our deeper understanding on the geographical pattern, transmission routes and infection mechanism of pathogens. Online surveillance and prognostication network is an environmental Surveillance tool for monitoring the outbreak of pandemic diseases and alarming the risks to take emergency actions, targeting aerosols, waters, soils and animals. Strategy is policies and legislations for social distancing, lockdown and personal protective equipment to block the spread of infectious diseases in communities. Clinical measures are Salvage on patients by innovating appropriate medicines and therapies. The ultimate defensive Shield is vaccine development to protect healthy crowds from infection. Fighting against COVID-19 and other emerging infectious diseases is a long rocky journey, requiring the common endeavors of scientists and politicians from all countries around the world. 5S in global biodefense system bring a ray of light to the current darkest and future road from environmental and geographical perspectives.

Performance and metagenomics analysis of anaerobic digestion of food waste with adding biochar supported nano zero-valent iron under mesophilic and thermophilic condition.

A large amount of food waste (FW) brings environmental pollution and sanitation problems. Anaerobic digestion (AD) is an effective technology to treat FW and generate biogas energy. This study investigated the effect of biochar supported nano zero-valent iron (BC-nZVI) on AD performance of FW. Results showed that the cumulative methane yield (CMY) increased by 21.52%-54.90% and the lag time decreased significantly with BC-nZVI. Under mesophilic and thermophilic condition, the peak of CMY was achieved at 178.82 ± 5.27 mL/g VS and 193.01 ± 6.81 mL/g VS with 5 g/L BC-nZVI, respectively. Besides, BC-nZVI stimulated hydrolysis process and reduced the inhibition of NH4+-N and volatile fatty acids accumulation, and it could improve the system stability. Structural equation model analysis indicated that digestion time, BC-nZVI, NH4+-N, temperature and total volatile fatty acid had significant effects on CMY, explaining 92.20% of its total variation. The metagenomic analysis of key microorganisms and related metabolism pathways involved in AD system was further investigated. The results suggested that BC-nZVI contributed to strengthen methanogenesis through enriching the various predominant methanogenic pathways and activating most enzymes related to methane metabolism. BC-nZVI could improve the AD system function and provided a better AD performance by shifting the microbial communities and altering functional genes. This study provided a theoretical basis for BC-nZVI applications and improvements in AD process of FW.

Physiological characteristics, geochemical properties and hydrological variables influencing pathogen migration in subsurface system: What we know or not?

The global outbreak of coronavirus infectious disease-2019 (COVID-19) draws attentions in the transport and spread of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) in aerosols, wastewater, surface water and solid wastes. As pathogens eventually enter the subsurface system, e.g., soils in the vadose zone and groundwater in the aquifers, they might survive for a prolonged period of time owing to the uniqueness of subsurface environment. In addition, pathogens can transport in groundwater and contaminate surrounding drinking water sources, possessing long-term and concealed risks to human society. This work critically reviews the influential factors of pathogen migration, unravelling the impacts of pathogenic characteristics, vadose zone physiochemical properties and hydrological variables on the migration of typical pathogens in subsurface system. An assessment algorithm and two rating/weighting schemes are proposed to evaluate the migration abilities and risks of pathogens in subsurface environment. As there is still no evidence about the presence and distribution of SARS-CoV-2 in the vadose zones and aquifers, this study also discusses the migration potential and behavior of SARS-CoV-2 viruses in subsurface environment, offering prospective clues and suggestions for its potential risks in drinking water and effective prevention and control from hydrogeological points of view.

Influenza A and B outbreaks differed in their associations with climate conditions in Shenzhen, China.

Under the variant climate conditions in the transitional regions between tropics and subtropics, the impacts of climate factors on influenza subtypes have rarely been evaluated. With the available influenza A (Flu-A) and influenza B (Flu-B) outbreak data in Shenzhen, China, which is an excellent example of a transitional marine climate, the associations of multiple climate variables with these outbreaks were explored in this study. Daily laboratory-confirmed influenza virus and climate data were collected from 2009 to 2015. Potential impacts of daily mean/maximum/minimum temperatures (T/Tmax/Tmin), relative humidity (RH), wind velocity (V), and diurnal temperature range (DTR) were analyzed using the distributed lag nonlinear model (DLNM) and generalized additive model (GAM). Under its local climate partitions, Flu-A mainly prevailed in summer months (May to June), and a second peak appeared in early winter (December to January). Flu-B outbreaks usually occurred in transitional seasons, especially in autumn. Although low temperature caused an instant increase in both Flu-A and Flu-B risks, its effect could persist for up to 10 days for Flu-B and peak at 17 C (relative risk (RR) = 14.16, 95% CI: 7.46-26.88). For both subtypes, moderate-high temperature (28 C) had a significant but delayed effect on influenza, especially for Flu-A (RR = 26.20, 95% CI: 13.22-51.20). The Flu-A virus was sensitive to RH higher than 76%, while higher Flu-B risks were observed at both low (< 65%) and high (> 83%) humidity. Flu-A was active for a short term after exposure to large DTR (e.g., DTR = 10 C, RR = 12.45, 95% CI: 6.50-23.87), whereas Flu-B mainly circulated under stable temperatures. Although the overall wind speed in Shenzhen was low, moderate wind (2-3 m/s) was found to favor the outbreaks of both subtypes. This study revealed the thresholds of various climatic variables promoting influenza outbreaks, as well as the distinctions between the flu subtypes. These data can be helpful in predicting seasonal influenza outbreaks and minimizing the impacts, based on integrated forecast systems coupled with short-term climate models.

Associations between HIV Testing and Consent Policies among Sexually Active Adolescents: Differences by Sexual Behavior.

HIV incidence remains high among US youth, especially among sexual minority youth. However, only half of youth with HIV are aware of their status. One potential explanation for low HIV testing rates is that restrictive policies may prevent minors from access HIV testing due to parental consent requirements. Using pooled data from the local Youth Risk Behavior Survey, we assessed whether state HIV testing laws, including age restrictions and explicit inclusion of HIV in STI testing consent laws, were associated with differences in HIV testing rates; differences by sexual behavior were also examined. Among female youth, policies were not associated with HIV testing. However, among male youth, both the presence of age restrictions and explicit inclusion in STI services were significantly associated with increased odds of HIV testing. Results indicate that policy changes may be effective at increasing testing among male youth who have sex with other males.