The Association Between Sexual Identity, Depression, and Adolescent Substance Use.

Sexual minority youth (SMY) represent a population vulnerable to several adverse health consequences. Specifically, SMY experience depression and substance use at substantially higher rates than heterosexual peers. Better understanding the relationship between depression and substance use among SMY may help reduce morbidity and mortality. We hypothesize that depression will moderate increased substance use rates seen in SMY. Weighted logistical analyses of covariance, adjusted for race/ethnicity, sex, and age, compared the relationship between sexual identity, depression, and substance use (14 outcomes), using data from the 2019 Youth Risk Behavior Survey (n = 13,677) of high school students. SMY reported depression at rates nearly double than heterosexual peers (63.9% vs 33.0%). Except for vaping and alcohol, SMY had significantly higher odds of all SU (aORs 1.41-2.45, p < 0.001-0.0011). After adjusting for depression, odds of all SMY substance use decreased; most relationships remained significant (aORs 0.73-1.89), though the relationship between SMY and lifetime cannabis use became non-significant. The relationship between SMY and current vaping became significant and the relationship between SMY and alcohol and binge-drinking remained non-significant. SMY are at higher risk for use of most substances and depression compared to heterosexual youth. As depression consistently plays a role in the relationship between sexual minority status and adolescent substance use across a wide variety of substances, it may be a modifiable risk factor for substance use among sexual minority youth that should be screened for and treated. This study additionally provides important information for future studies examining nuances of SMY substance use patterns.

Corrigendum: Physiology of the Nitrite-Oxidizing Bacterium Candidatus Nitrotoga sp. CP45 Enriched From a Colorado River.

[This corrects the article DOI: 10.3389/fmicb.2021.709371.].

Physiology of the Nitrite-Oxidizing Bacterium Candidatus Nitrotoga sp. CP45 Enriched From a Colorado River.

Nitrogen cycling microbes, including nitrite-oxidizing bacteria (NOB), perform critical ecosystem functions that help mitigate anthropogenic stresses and maintain ecosystem health. Activity of these beneficial nitrogen cycling microbes is dictated in part by the microorganisms' response to physicochemical conditions, such as temperature, pH, and nutrient availability. NOB from the newly described Candidatus Nitrotoga genus have been detected in a wide range of habitats across the globe, yet only a few organisms within the genus have been physiologically characterized. For freshwater systems where NOB are critical for supporting aquatic life, Ca. Nitrotoga have been previously detected but little is known about the physiological potential of these organisms or their response to changing environmental conditions. Here, we determined functional response to environmental change for a representative freshwater species of Ca. Nitrotoga (Ca. Nitrotoga sp. CP45, enriched from a Colorado river). The physiological findings demonstrated that CP45 maintained nitrite oxidation at pH levels of 5-8, at temperatures from 4 to 28°C, and when incubated in the dark. Light exposure and elevated temperature (30°C) completely halted nitrite oxidation. Ca. Nitrotoga sp. CP45 maintained nitrite oxidation upon exposure to four different antibiotics, and potential rates of nitrite oxidation by river sediment communities were also resilient to antibiotic stress. We explored the Ca. Nitrotoga sp. CP45 genome to make predictions about adaptations to enable survival under specific conditions. Overall, these results contribute to our understanding of the versatility of a representative freshwater Ca. Nitrotoga sp. Identifying the specific environmental conditions that maximize NOB metabolic rates may ultimately direct future management decisions aimed at restoring impacted systems.