Continuation of Mosquito Surveillance and Control During Public Health Emergencies and Natural Disasters.

Mosquitoborne disease outbreaks occur every year in the United States from one or more of the arboviral diseases dengue, West Nile, LaCrosse, Eastern equine encephalitis, and Zika (1). Public opinion communicated through traditional and social media and the Internet, competing public health and resource priorities, and local conditions can impede the ability of vector control organizations to prevent and respond to outbreaks of mosquitoborne disease. The Environmental Protection Agency (EPA) and CDC performed a coordinated review of the concerns and challenges associated with continuation of mosquito surveillance and control during public health emergencies and disasters. This report highlights the first joint recommendation from EPA and CDC. Mosquito surveillance and control should be maintained by state and local mosquito control organizations to the extent that local conditions and resources will allow during public health emergencies and natural disasters. Integrated pest management (IPM) is the best approach for mosquito control (2). IPM uses a combination of methods, including both physical and chemical means of control (3). For chemical means of control, CDC and EPA recommend the use of larvicides and adulticides following the EPA label. It is imperative that public health recommendations be followed to ensure the safety of the pesticide applicator and the public.

Factors Influencing Risk for COVID-19 Exposure Among Young Adults Aged 18-23 Years - Winnebago County, Wisconsin, March-July 2020.

On May 13, 2020, the Wisconsin Supreme Court declared the state's Safer at Home Emergency Order (https://evers.wi.gov/Documents/COVID19/EMO28-SaferAtHome.pdf) "unlawful, invalid, and unenforceable,"* thereby increasing opportunities for social and business interactions. By mid-June, Winnebago County,† Wisconsin experienced an increase in the number of infections with SARS-CoV-2, the virus that causes coronavirus disease 2019 (COVID-19), with the largest increase among persons aged 18-23 years (young adults) (1). This age group§ accounts for 12.5% of the population in the county. To identify factors that influence exposure to COVID-19 among young adults in Winnebago County, characteristics of COVID-19 cases and drivers of behaviors in this age group were examined. During March 1-July 18, 2020, 240 young adults received positive SARS-CoV-2 test results, accounting for 32% of all Winnebago County cases. In 30 key informant interviews, most interviewees reported exposure to misinformation, conflicting messages, or opposing views about the need for and effectiveness of masks. Thirteen young adults described social or peer pressure to not wear a mask and perceived severity of disease outcome for themselves as low but high for loved ones at risk. Having low perceived severity of disease outcome might partly explain why, when not in physical contact with loved ones at risk, young adults might attend social gatherings or not wear a mask (2). Exposure to misinformation and unclear messages has been identified as a driver of behavior during an outbreak (3,4), underscoring the importance of providing clear and consistent messages about the need for and effectiveness of masks. In addition, framing communication messages that amplify young adults' responsibility to protect others and target perceived social or peer pressure to not adhere to public health guidance might persuade young adults to adhere to public health guidelines that prevent the spread of COVID-19.

Dehydroepiandrosterone (DHEA) supplementation results in supraphysiologic DHEA-S serum levels and progesterone assay interference that may impact clinical management in IVF.

PURPOSE: Dehydroepiandrosterone (DHEA) is often prescribed for poor responders in IVF in an effort to improve response to ovarian stimulation. The effect of DHEA supplementation and resultant supraphysiologic DHEA-S serum levels on sex steroid assays has not been evaluated in this population. This study seeks to determine the relationship between DHEA supplementation and progesterone measurements to characterize the degree of interference with particular immunoassays. METHODS: Characterization was accomplished in two phases. First, DHEA-S standard control reagents with no progesterone present were assayed for both DHEA-S and progesterone levels. Second, serum pools from 60 unique IVF patients' serum were used to create six pooled serum samples: three from patients on DHEA supplementation and three from patients not on DHEA supplementation. The three pools were composed of patients whose serum fell into low, medium, and high progesterone ranges. Baseline DHEA-S and progesterone were measured, and the mean level of DHEA-S in the mid-range progesterone pool was used as the mid-point for addition of DHEA-S standard to the serum pools from patients without DHEA supplementation. Progesterone from these pools was then measured on three commercially available immunoassay systems. RESULTS: The first experiment revealed a linear increase in progesterone when analyzing the DHEA-S standard ranging from 0.5 µg/dL [corrected] in the blank control (no DHEA-S) to up to 2.0 µg/dL [corrected] in the high control (DHEA-S >700 µg/dL), [corrected] indicating that the DHEA-S cross-reacts with the progesterone assays. In the second experiment, patients' serum DHEA-S and progesterone were measured from pooled serum samples of those taking DHEA and those not taking DHEA. Adding DHEA-S to the pooled serum of those not taking DHEA resulted in a linear increase in progesterone levels on two of three commercially available immunoassays (p < 0.05). CONCLUSIONS: DHEA-S can interfere with standard progesterone immunoassays used in clinical ART programs, and thus serum progesterone levels in IVF patients on DHEA supplementation may not reflect truly bioactive progesterone.

Vitamin D levels do not affect IVF outcomes following the transfer of euploid blastocysts.

OBJECTIVE: We sought to characterize the relationship between serum 25-hydroxy vitamin D (25-OH D) levels and implantation and clinical pregnancy rates in women who undergo a euploid blastocyst embryo transfer. STUDY DESIGN: This retrospective cohort study, conducted in an academic setting, included 529 cycles in which comprehensive chromosome screening was performed as part of routine infertility care with an autologous transfer of 1 or 2 euploid blastocysts. After excluding repeat cycles there were 517 unique cycles representing 517 women for evaluation. Vitamin D levels from serum samples obtained on the day of ovulation trigger in the fresh in vitro fertilization cycle were analyzed. The primary outcome was ongoing pregnancy rate as defined by sonographic presence of fetal heart rate at >8 weeks' gestation. RESULTS: For the population as a whole, serum vitamin D ranges and pregnancy outcomes did not correlate. Furthermore, pregnancy rates did not differ when comparing women in different strata of vitamin D levels (<20, 20-29.9, and ≥30 ng/mL). No meaningful breakpoint for vitamin D levels and ongoing pregnancy rate was identified using receiver operating characteristic analysis with the resultant line possessing an area under the curve of 0.502. Multivariate logistic regression controlling for age, transfer order, race, season, and body mass index did not yield a different result. The study was powered to detect an 18% difference in ongoing pregnancy rates between patients grouped by the 3 vitamin D ranges. CONCLUSION: In women undergoing euploid embryo transfer, vitamin D status was unrelated to pregnancy outcomes. Measuring serum 25-OH vitamin D levels does not predict the likelihood that euploid blastocysts will implant. These results may not apply to women who do not undergo extended embryo culture, blastocyst biopsy for comprehensive chromosome screening, and euploid embryo transfer.

Embryology training for Reproductive Endocrine fellows in the clinical human embryology laboratory.

OBJECTIVE: To determine if comprehensive embryology training for clinical Reproductive Endocrinology fellows could be completed to a level of proficiency equivalent to that of experienced embryologists. METHOD: Clinical fellows were integrated into the clinical embryology team and were trained to perform all the various procedures utilized in clinical embryology. The fellows were trained to the same standards as the clinical embryology staff and underwent the same certification and sign off procedures. To determine if inclusion of clinical fellows on the embryology team impacted outcomes, outcomes for individual oocytes/embryos and the clinical cases where the fellows perform embryology procedures were compared to the outcomes of those oocytes/embryos and cases performed by the full time embryology staff. RESULTS: Clinical procedures performed by the fellows included isolation and processing of oocytes following retrieval, loading catheters for embryo transfer, and vitrification (N = 823 cases). Micromanipulation procedures compared included ICSI and assisted hatching (N = 650 cases). For each procedure, the outcomes in those cases performed by the RE fellows were equivalent to those done by the fully trained clinical embryology staff. CONCLUSIONS: When fellows are trained to perform embryology procedures as an integral part of their fellowship curricula, laboratory efficiencies and clinical outcomes are fully maintained. This experience provides valuable insight into the ART process critical to this subspecialty. It also empowers fellows to fully participate in research relating to the viability of gamete and embryos and optimization of the clinical ART laboratory.

Tracking embryo implantation using cell-free fetal DNA enriched from maternal circulation at 9 weeks gestation.

Embryo DNA fingerprinting represents an important tool for tracking embryo-specific outcomes after multiple embryo transfer during IVF. The situation in which two embryos are transferred and only one implants represents a unique opportunity for the most well-controlled validation of markers capable of identifying competent and incompetent embryos. Specifically, this design eliminates all patient-related variables from the comparison of embryos with or without reproductive potential. However, in order to determine which embryo implanted, the investigator must wait until newborn DNA is available upon delivery. This study validates a non-invasive cell-free fetal DNA fingerprinting method that reduces the time to identify which embryo implanted by ∼31 weeks. Thirty-four patients were studied to determine if fingerprinting of fetal DNA extracted from maternal plasma at nine gestational weeks concurred with the buccal DNA results obtained from the newborn after delivery. This validation required single nucleotide polymorphism profiles on each couples' preimplantation embryos, cell-free fetal DNA from maternal plasma at 9 weeks gestation, and newborn DNA obtained from buccal swabs after delivery. The predictions from fetal DNA-based embryo tracking and gender assignments made at 9 weeks gestation were 100% consistent with standardized methods of assessment performed after term delivery. This study demonstrates the first validated fetal DNA fingerprinting method which predicts both gender and which embryo implanted at 9 weeks gestation following multiple embryo transfer.

Centers for Disease Control and Prevention National Center for Environmental Health/Agency for Toxic Substances and Disease Registry Roles in Hurricane Response and Postdisaster Mosquito Control1.

Hurricanes and other natural disasters leave behind multifaceted and complex environmental challenges that may contribute to adverse health outcomes, such as increased potential for exposure to vector-borne disease. Through an incident management system tailored for the Centers for Disease Control and Prevention (CDC), the National Center for Environmental Health/Agency for Toxic Substances and Disease Registry (NCEH/ATSDR) fulfills a leadership role in facilitating the agency's natural disaster emergency response activities through coordination with other CDC programs, liaising with other government agencies and impacted jurisdictions, and responding to requests for technical assistance. On the ground, NCEH/ATSDR deploys environmental health (EH) practitioners who provide consultation and inform mosquito control efforts from a systematic perspective. In the wake of recent hurricanes, NCEH staff mobilized to manage critical elements of the responses and to provide assets for addressing environmental hazards and conditions that contributed to the presence of mosquitoes. In this article, we describe NCEH/ATSDR's emergency response roles and responsibilities, interactions within the national emergency response framework, and provision of EH technical assistance and resources, particularly in the context of postdisaster mosquito control.