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Mosquitoes host communities of microbes in their digestive tract that consist primarily of bacteria.We previously reported that several mosquito species, including Aedes aegypti, do not develop beyond the first instar when fed a nutritionally complete diet in the absence of a gut microbiota. In contrast, several species of bacteria, including Escherichia coli, rescue development of axenic larvae into adults. The molecular mechanisms underlying bacteria-dependent growth are unknown. Here, we designed a genetic screen around E. coli that identified high-affinity cytochrome bd oxidase as an essential bacterial gene product for mosquito growth. Bioassays showed that bacteria in nonsterile larvae and gnotobiotic larvae inoculated with wildtype E. coli reduced midgut oxygen levels below 5%, whereas larvae inoculated with E. coli mutants defective for cytochrome bd oxidase did not. Experiments further supported that hypoxia leads to growth and ecdysone-induced molting. Altogether, our results identify aerobic respiration by bacteria as a previously unknown but essential process for mosquito development.

DESCRIPTION:The American College of Occupational and Environmental Medicineʼs guidelines have been updated to develop more detailed guidance for treatment of acute, subacute, chronic, and postoperative pain with opioids. METHODS:Literature searches were performed using PubMed, EBSCO, Cochrane Review, and Google Scholar without publication date limits. Of 264,617 articlesʼ titles screened and abstracts reviewed, 263 articles met inclusion criteria. Of these, a total of 157 were of high and moderate quality addressing pain treatment. Comprehensive literature reviews were accomplished with article abstraction, critiquing, grading, evidence table compilation, and guideline finalization by a multidisciplinary expert panel to develop evidence-based guidance. RECOMMENDATIONS:No quality evidence directly supports histories, physical examinations, and opioid treatment agreements, although they are thought to be important. No quality trials were identified showing superiority of opioids, compared with nonsteroidal anti-inflammatory and other medications for treatment of chronic, noncancer pain. The use of opioid-sparing treatments associated with lower doses of postoperative opioids is also associated with better long-term functional outcomes. Selective use of opioids is recommended for patients with acute and postoperative pain. Consensus recommendations also include consideration of carefully conducted trials of chronic opioid treatment for highly select patients with subacute and chronic pain and to maintenance opioid prescriptions only if documented objective functional gain(s) results. A strong and reproducible dose–response relationship identifies a recommended morphine equivalent dose limit of no more than 50 mg/day. Higher doses should be prescribed only with documented commensurately greater functional benefit(s), comprehensive monitoring for adverse effects, informed consent, and careful consideration of risk versus benefit of such treatment. Chronic opioid use should be accompanied by informed consent, a treatment agreement, tracking of functional benefits, drug screening, and attempts at tapering.

OBJECTIVE:ACOEM has updated the treatment guidelines concerning opioids. This report highlights the safety-sensitive work recommendation that has been developed. METHODS:Comprehensive literature reviews were accomplished with article abstraction, critiquing, grading, evidence table compilation, and guideline finalization by a multidisciplinary expert panel to develop evidence-based guidance. A total of 12 moderate-quality studies were identified to address motor vehicle crash risk, and none regarding other work among opioid-using patients. RESULTS:Acute or chronic opioid use is not recommended for patients who perform safety-sensitive jobs. These jobs include operating motor vehicles, other modes of transportation, forklift driving, overhead crane operation, heavy equipment operation and tasks involving high levels of cognitive function and judgment. CONCLUSION:Quality evidence consistently demonstrates increased risk of vehicle crashes and is recommended as the surrogate for other safety-sensitive work tasks.

Abstract Myelomeningocele (MMC) is the most common open neural tube defect associated with long-term survival. In 2011, The Management of Myelomeningocele Study (MOMS) trial demonstrated that fetal repair for MMC reduced the rate of shunted hydrocephalus and improved developmental, motor, and ambulation outcomes at 30 mo compared to postnatal intervention.1 Recent studies have demonstrated the safety and feasibility of fetoscopic MMC repair as well as reduction in preterm birth, lower risk of uterine dehiscence, and the option of vaginal delivery with this approach compared to open fetal repair.2-4 The patient is a 25-yr-old female, G4 P2, who presented at 20 wk's gestation with ultrasound findings concerning for MMC and Chiari II malformation. These findings were further corroborated with fetal magnetic resonance imaging. After extensive prenatal counseling in a multidisciplinary fashion and discussion regarding risks and benefits of prenatal closure of the MMC, the patient chose to undergo prenatal repair and surgical consent was obtained. At 25 wk's gestation, the patient underwent a fetoscopic multilayer closure with dural patch repair using a standardized, 3-port, carbon dioxide insufflation technique for the intrauterine treatment of MMC without any postoperative complications. The duration of the entire procedure was 275 min. At 36 wk's and 1 d's gestational age, the patient had a spontaneous vaginal delivery, resulting in a healthy male newborn. The surgical site was well healed without complications, and follow-up radiographic imaging was reassuring. This edited, 2-dimensional operative video highlights the key steps of the fetoscopic closure with follow-up postnatal clinical and radiographic outcomes.

On December 22, 2008, a dike containing coal fly ash at the Tennessee Valley Authority Kingston Fossil Plant (TN, USA) failed, and within months, dredging operations began to remove ash-contaminated sediments. The purpose of this study was to investigate differences in the bioaccumulation of metals in three mussel species during and after dredging operations. Mussels were caged for approximately 1 year during dredging and after, and then mussel condition index values and As, Cd, Cr, Pb, Ni, Se, Hg, U, Fe, Mg, Al, Sb, Ba, Be, Co, Cu, Mn, Mo, Ag, Sr, Tl, V, and Zn concentrations in soft tissue were determined via inductively coupled plasma–mass spectrometery. Overall, the differences observed in metal bioaccumulation and mussel health suggest that mussels in the immediate downstream area of the dredging site may have been impacted, as evidenced by a significant decrease in mussel condition index values, but that this impact did not result in increased tissue concentrations of metals.

An understanding of the division of labor in different societies, and especially how it evolved in the human species, is fundamental to most analyses of social, political, and economic systems. The ability to reconstruct how labor was organized, however, especially in ancient societies that left behind few material remains, is challenged by the paucity of direct evidence demonstrating who was involved in production. This is particularly true for identifying divisions of labor along lines of age, sex, and gender, for which archaeological interpretations mostly rely upon inferences derived from modern examples with uncertain applicability to ancient societies. Drawing upon biometric studies of human fingerprints showing statistically distinct ridge breadth measurements for juveniles, males, and females, this study reports a method for collecting fingerprint impressions left on ancient material culture and using them to distinguish the sex of the artifacts’ producers. The method is applied to a sample of 985 ceramic sherds from a 1,000-y-old Ancestral Puebloan community in the US Southwest, a period characterized by the rapid emergence of a highly influential religious and political center at Chaco Canyon. The fingerprint evidence demonstrates that both males and females were significantly involved in pottery production and further suggests that the contributions of each sex varied over time and even among different social groups in the same community. The results indicate that despite long-standing assumptions that pottery production in Ancient Puebloan societies was primarily a female activity, labor was not strictly divided and instead was likely quite dynamic.

The susceptibility of Tennessee’s Appalachian Mountains to anthropogenic stressors has remained largely uninvestigated likely due to a lack of known point source contamination. However, a growing body of scientific evidence suggests that depositional inputs can lead to concerning levels of contamination, even in remote areas. To investigate potential concerns, water quality parameters, contaminants in water (nitrogen, TSS, and metals), and contaminants in eastern brook trout (mercury, polychlorinated biphenyls [PCBs], organochlorine [OC] pesticides, dioxins, furans, and phthalates) were measured in four Appalachian Mountain streams from 2015 to 2017. Concentrations were compared to literature and/or model-derived (e.g., biotic ligand model) threshold values to determine whether levels exceeded those acceptable for stream health. Dioxins and furans were detectable in fish tissue at all sites with an average 2,3,7,8-tetrachlorodinbenzodioxin toxicity equivalence (TEQ) of 0.0015 ng/kg. Concentrations of PCBs, phthalates, and organochlorine pesticides were never above analytical quantitation limits, although several OC pesticides (e.g., alpha-chlordane) were detectable in fish. Aluminum concentrations in water were found at levels shown previously to cause mortality in brook trout during acidic rain events. The average whole-body methylmercury concentrations in fish among sites were 0.037 ± 0.003 μg/kg and were on average 75 ± 2% of total mercury.

Objective To explore the effect that different activities included in first aid training can have on an individual's propensity to act in a medical emergency. Design Additional pilot-developed activities were added to a core first aid training session to create six unique groups, including a control group where no activities were added. Participants rated their agreement to pre-identified fears following the course and scored their self-efficacy and willingness to act before, immediately after and 2 months after the course. Change values were compared between groups. Setting Three locations in the UK (community halls, schools). Participants 554 members of the public were recruited using advertising and community groups. A deliberately broad demographic was sought and achieved using targeted approaches where a particular demographic was deficient. Intervention Each participant attended one British Red Cross first aid course lasting 2 h. Main outcome measures The same questionnaire was completed by all participants before and after each course. Two months later all participants were asked a series of follow-up questions. Results All courses showed an increase in self-efficacy and willingness to act immediately following the course. The course, which included both factual information relevant to helping in an emergency and ‘helper’ identity activities, produced significantly more positive responses to pre-identified fears. Conclusions Activities which allow the learner to explore and discuss behaviour in an emergency situation can effectively increase the learner's propensity to act. First aid education should be expanded to support the learner to develop both the skill and the will to help.

Concentration as a Limiting Factor Virginia Marks, distinguished teaching professor at Bowling Green State University, once stated that one's focus, or concentration, during a performance played a significant role in one's ability to perform from memory1 Within psychology, the concept of concentration is discussed as a construct of attention. Instead, other things occupy the performer's mind: butterflies in the stomach, a cell phone ringing in the audience, bright stage lights, unfamiliar recital clothes, a note or two that were just missed or a difficult passage yet to come. In fact, the constrictive clothing worn for performances actually alters the biomechanics of playing-compare pedaling on the piano in sneakers to high heels, or compare playing leaps and arpeggios with a jacket that is tight in the shoulders with a tee-shirt.\\n A modified version of this technique-with eyes open and mind and body still active-can be used to reduce tension and regain focus while playing a piece.