A Mobile Health Intervention to Support Parenting Self-Efficacy in the Neonatal Intensive Care Unit from Admission to Home.

OBJECTIVE: To test whether parents of premature infants less than 37 weeks of gestation provided with a unique smartphone app designed to support parents had greater parenting self-efficacy, a key element in parenting confidence, compared with controls. STUDY DESIGN: Using a quasiexperimental, time-lagged study design, parents were assigned to either usual care (control) or NICU2HOME app (intervention) groups. Both groups completed the validated Parenting Sense of Competence (PSOC) scale at 4 time points (approximately day of life 7, 1 day before discharge, and at 14 and 30 days after discharge) representing the neonatal intensive care unit, discharge, and home contexts. App use was described and categorized. Univariate group differences were assessed, and linear mixed effect regression models were used to assess treatment group effect on PSOC score across time, adjusted for covariates and controlling for overall family effect. RESULTS: We enrolled 298 parents (123 control, 175 intervention) with 256 completing 1 or more PSOC screenings. The intervention group had sustained higher PSOC scores than those of the control group (estimate, 4.3; P = .0042) from the first measurement onward with no significant change in PSOC score across time for either group. Average app use was 15 taps per average day; average and above-average users had significantly higher PSOC scores (estimate, 5.16; P = .0024; estimate, 5.16; P = .014) compared with controls or below-average users. CONCLUSIONS: Compared with controls, parents assigned to use the NICU2HOME app reported greater parenting self-efficacy while in the neonatal intensive care unit and this continued once discharged to home. Novel technologies such as point-of-care smartphone applications may hold promise for supporting parents in difficult and stressful situations. TRIAL REGISTRATION: ClincalTrials.gov: NCT03505424.

Community- and population-level changes in diatom size structure in a subarctic lake over the last two centuries.

Climate change over the last two centuries has been associated with significant shifts in diatom community structure in lakes from the high arctic to temperate latitudes. To test the hypotheses that recent climate warming selects for species of smaller size within communities and a decrease in the average size of species within populations, we quantified the size of individual diatom valves from 10 depths in a sediment core covering the last ∼200 years from a pristine subarctic lake. Over the last ∼200 years, changes in the relative abundance of species of different average size and changes in the average valve size of populations of species contribute equally to the changes in community size structure, but are often opposite in sign, compensating for one another and moderating temporal changes in community size structure. In the surface sediments that correspond to the recent decades when air temperatures have warmed, the mean size of valves in the diatom community has significantly decreased due to an increase in the proportion of smaller-sized planktonic diatom species.

Lactobacillus brantae sp. nov., isolated from faeces of Canada geese (Branta canadensis).

Three strains of lactic acid bacteria (LAB) were isolated from the faeces of apparently healthy wild Canada geese (Branta canadensis) in 2010 by cultivating faecal LAB on Rogosa SL agar under aerobic conditions. These three isolates were found to share 99.9 % gene sequence similarity of their 16S rRNA, their 16S-23S intergenic transcribed spacer region (ITS), partial 23S rRNA, rpoB, rpoC, rpoA and pheS gene sequences. However, the three strains exhibited lower levels of sequence similarity of these genetic targets to all known LAB, and the phylogenetically closest species to the geese strains were Lactobacillus casei, Lactobacillus paracasei, Lactobacillus rhamnosus and Lactobacillus saniviri. In comparison to L. casei ATCC 393(T), L. paracasei ATCC 25302(T), L. rhamnosus ATCC 7469(T) and L. saniviri DSM 24301(T), the novel isolates reacted uniquely in tests for cellobiose, galactose, mannitol, citric acid, aesculin and dextrin, and gave negative results in tests for l-proline arylamidase and l-pyrrolydonyl-arylamidase, and in the Voges-Proskauer test. Biochemical tests for cellobiose, aesculin, galactose, gentiobiose, mannitol, melezitose, ribose, salicin, sucrose, trehalose, raffinose, turanose, amygdalin and arbutin could be used for differentiation between L. saniviri and the novel strains. On the basis of phenotypic and genotypic characteristics, and phylogenetic data, the three isolates represent a novel species of the genus Lactobacillus, for which the name Lactobacillus brantae sp. nov. is proposed. The type strain is SL1108(T) (= ATCC BAA-2142(T) = LMG 26001(T) = DSM 23927(T)) and two additional strains are SL1170 and SL60106.