Indirect, non-invasive detection of rare aquatic macrofauna using aqueous environmental DNA (eDNA) is a relatively new approach to population and biodiversity monitoring. As such, the sensitivity of monitoring results to different methods of eDNA capture, extraction, and detection is being investigated in many ecosystems and species. One of the first and largest conservation programs with eDNA-based monitoring as a central instrument focuses on Asian bigheaded carp (Hypophthalmichthys spp.), an invasive fish spreading toward the Laurentian Great Lakes. However, the standard eDNA methods of this program have not advanced since their development in 2010. We developed new, quantitative, and more cost-effective methods and tested them against the standard protocols. In laboratory testing, our new quantitative PCR (qPCR) assay for bigheaded carp eDNA was one to two orders of magnitude more sensitive than the existing endpoint PCR assays. When applied to eDNA samples from an experimental pond containing bigheaded carp, the qPCR assay produced a detection probability of 94.8% compared to 4.2% for the endpoint PCR assays. Also, the eDNA capture and extraction method we adapted from aquatic microbiology yielded five times more bigheaded carp eDNA from the experimental pond than the standard method, at a per sample cost over forty times lower. Our new, more sensitive assay provides a quantitative tool for eDNA-based monitoring of bigheaded carp, and the higher-yielding eDNA capture and extraction method we describe can be used for eDNA-based monitoring of any aquatic species.
Consensus statements and clinical reports exist to guide the transition of youth from pediatric to adult healthcare services. Across the range of youth with no chronic health conditions to those with the most complex disabilities, the standards of practice continue to vary broadly across the country and internationally. Youth and young adults with combined conditions of epilepsy with intellectual disability are a small subset of the total population of young adults who share common needs. These include a system of supports that supplement each person's limitations in autonomy and self-management. Caregivers play significant roles in their lives, whether they are family members or paid direct service providers. Medical decision making and treatment adherence require specific adaptations for patients whose independence due to disability is unlikely. Key issues related to tuberous sclerosis complex, neurofibromatosis, and Rett and Sturge–Weber syndromes will be highlighted.
The use of growth attenuation therapy (GAT) is becoming more common in order to enable a family to care for a child with profound cognitive and physical disabilities (PCPD) as they age into adulthood. The first published study on the use of GAT was done with the family of a six-year-old girl with PCPD by Daniel Gunther and Douglas Diekema in Pediatrics in 2006. The ethical application of GAT generated considerable discussion on the use among children with PCPD in the medical and ethics communities. This paper discusses the use of GAT for children with profound cognitive and physical disabilities from a Catholic bioethics perspective.
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