The probabilistic aggregate consumer exposure model (PACEM): Validation and comparison to a lower-tier assessment for the cyclic siloxane D5

a b s t r a c t a r t i c l e i n f o Current practice of chemical risk assessment for consumer product ingredients still rarely exercises the aggregation of multi-source exposure. However, focusing on a single dominant source/pathway combination may lead to a significant underestimation of the risk for substances present in numerous consumer products, which often are used simultaneously. Moreover, in most cases complex multi-route exposure scenarios also need to be accounted for. This paper introduces and evaluates the performance of the Probabilistic Aggregate Consumer Exposure Model (PACEM) applied in the context of a tiered approach to exposure assessment for ingredients in cosmetics and personal care products (C&PCPs) using decamethylcyclopentasiloxane (D5) as a worked example. It is demonstrated that PACEM predicts a more realistic, but still conservative aggregate exposure within the Dutch adult population when compared to a deterministic point estimate obtained in a lower tier screening assessment. An overall validation of PACEM is performed by quantitatively relating and comparing its estimates to currently available human biomonitoring and environmental sampling data. Moderate (by maximum one order of magnitude) overestimation of exposure is observed due to a justified conservatism built into the model structure, resulting in the tool being suitable for risk assessment

Inheritance of ectopic ureters in Entlebucher Mountain Dogs

To test the hypothesis of a heritable base of ectopic ureters (EU) in Entlebucher Mountain Dogs (EMD) and to elucidate associated risk factors and mode of inheritance of the disease, 565 EMD were clinically investigated and population genetic analyses performed. Based on the location of the most caudal termination of the ureteral openings, 552 EMD were classified into three phenotype groups trigone, intravesically and extravesically ectopic based on results of abdominal sonography, urethra-cystoscopy and/or contrast-enhanced computed tomography. One-third (32.9%) of the phenotyped animals had normal terminations of both ureters in the bladder trigone, 47.3% had at least one intravesicular ectopic termination and 19.8% had at least one extravesicular ectopic termination. Multivariate mixed logistic regression revealed gender as a risk factor associated with EU as males were more often affected than females. Complex segregation analysis indicated a hereditary basis for EU in EMD and the involvement of a major gene in the occurrence of the extravesicular EU phenotype

Multiple child food hypersensitivity impacts positive adjustment in parents

© 2017, Springer Science+Business Media New York. The physical impacts of food hypersensitivities (e.g. food allergy, food intolerance) encompass wide ranging but individually specific reactions. In contrast, the psychological impact of such illnesses extends beyond the individual who suffers the sensitivity. No Australian studies have examined the psychosocial impact of parenting a child with food hypersensitivities. The aim of this study was to ascertain differences in the psychosocial profile of parents raising a food hypersensitive child. Australian parents were targeted through three national support organisations and answered questions regarding their psychological health. Of a total of 990 respondents, 599 had children. These families comprised 1316 children aged 0–18 (M = 7.63 years) and more than half (n = 393) of these families were managing a child with a food hypersensitivity. Parents showed no differences in measured distress. In contrast, positive adjustment was higher for parents of food intolerant children and children with both food allergy and food intolerance, compared to those with non-food hypersensitive children. Moreover parents of children with combined food hypersensitivities reported a greater degree of positive change. The finding that parents of food hypersensitive children were not reporting higher levels of stress than parents without a food hypersensitive child is in stark contradiction to international studies examining both food hypersensitivity and parents of children with a chronic disease more generally. However, it appears that the complexity of the food hypersensitivity had a positive impact on adjustment with parents of children with multiple types of food hypersensitivity reporting greater positive adjustment outcomes