Poster 361: Psychogenic Polydipsia after Pediatric Severe Traumatic Brain Injury: A Case Report

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/146855/1/pmr2s246a.pd

A First Look at the Microbial Community of Rabidosa rabida, a Wolf Spider in Searcy, Arkansas

Many diverse animal models have been used to explore the interactions between host organisms and their microbiota. Increased understanding of microbe-host interactions could lead to improved healthcare and drug development. Spiders have venom, digestive fluid, and body fluid components that have been suggested to possess antimicrobial properties that could lead to new and interesting host-microbe interactions. While studies have been published on interactions between bacteria affecting the immune function and behavior of spiders, the spider microbiome has not been established to date. Excreta and body swabs were collected from Rabidosa rabida, a wolf spider typically found on tall grass or low vegetation. Bacteria were cultured on tryptic soy agar, an all-purpose media known to grow most common bacterial strains, plates and 53 bacterial samples were Gram stained, catalase, and coagulase tested using aseptic technique. Staphylococcus aureus, Staphylococcus sp., and a Gram-positive bacillus were found on the excreta samples while Staphylococcus sp., Gram-negative bacilli, and Gram-negative cocci were found on the body swabs. Most of the excreta samples had little to no growth. The body swabs had multiple types of microorganisms that were limited to body location. A better understanding of this relatively simple host-microbe interaction can provide an understanding of the factors affecting these interactions allowing us to then understand more complex interactions such as those found in humans

A Description of Variation in Fecundity Between Two Populations of Wolf Spider Rabidosa rabida in Searcy Arkansas Using Brood Size Measurements

Fecundity, a very important population variable, can be estimated by measuring the number of juveniles hatching out of individual egg sacs. Rabidosa rabida is a large wolf spider that is common in Arkansas and much of the eastern portion of North America. This study attempts to expand previous estimates of variation in fecundity made for this species by Reed and Nicholas in Mississippi. We hypothesized that a significant variation would be found in fecundity estimates between two populations in Arkansas. We also hypothesized that this variation would be similar to the variation reported in Mississippi. Two populations of R. rabida were collected in late August and early September. The egg sacs were allowed to hatch while both the mothers and juveniles were placed in alcohol, with the exception of twenty from each mother which were photographically measured. A comparison was made between the two populations and between variation measured by Reed and Nicholas. We found significant variation between brood size of the two populations in Arkansas similar in magnitude to what was found in Mississippi. We did not find any significant difference in size of juveniles between the two locations similar to what was found in Mississippi. Observing patterns in these traits provide a starting point for comparison to future measurements which may aid in quantifying differences in populations caused by climate change. This has been a frequent challenge in recent ecological and conservation studies of invertebrates

Observations of undescribed diel activity in the wolf spider Rabidosa rabida show cathemeral behavior

This note provides a first clear description of diel timing of some important behaviors in the ecologically important wolf spider, Rabidosa rabida

The common feeder cockroach Blaptica dubia shows increased transmission distance based on mode of acquisition of environmental bacteria

Although some researchers claim that cockroaches are masters of disease transmission, these claims have little to no scientific support. Most studies concerning cockroaches as a vector of disease only focus on the bacteria found on the body surface, not on whether cockroaches have actually transferred pathogenic bacteria via surface contact. We set out to determine if cockroaches would act as a mechanical vector for the transfer of the opportunistic pathogen, E. coli. Roaches were contaminated with Green fluorescent protein expressing E. coli (GFP-E.coli) broth by either walking the roach through a broth culture or by complete immersion in the culture.. We then ran the roaches down a sterile agar track and measured the length of the glowing trail. Roaches were able to transmit E.coli, but only for a continuous distance of less than 50 cm, with the occasional sporadic colony growing after that. Roaches that were immersed in bacterial broth tracked the bacterium further than those that only walked through the solution. This suggests that while cockroaches are capable of acting as a mechanical vector, they are not capable of transporting transient flora over long distances. Future studies should explore this mechanism

The Family Caregiving Dilemma

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/146879/1/pmr290.pd

Ketone Hydrosilylation with Sugar Silanes Followed by Intramolecular Aglycone Delivery: An Orthogonal Glycosylation Strategy

Gettin' a little sugar—no alcohol required : A procedure for the direct glycosylation of ketones without a hydroxy intermediate enables the site-selective glycosylation of hydroxyketones at the ketone or the alcohol functionality without the use of protecting groups on the aglycone (see scheme). Site selectivity is controlled by the catalyst structure in hydrosilylation and dehydrogenative silylation reactions with sugar silanes. Bn=benzyl.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/63086/1/anie_200901666_sm_miscellaneous_information.pd

Measurement of the Bottom-Strange Meson Mixing Phase in the Full CDF Data Set

We report a measurement of the bottom-strange meson mixing phase \beta_s using the time evolution of B0_s -> J/\psi (->\mu+\mu-) \phi (-> K+ K-) decays in which the quark-flavor content of the bottom-strange meson is identified at production. This measurement uses the full data set of proton-antiproton collisions at sqrt(s)= 1.96 TeV collected by the Collider Detector experiment at the Fermilab Tevatron, corresponding to 9.6 fb-1 of integrated luminosity. We report confidence regions in the two-dimensional space of \beta_s and the B0_s decay-width difference \Delta\Gamma_s, and measure \beta_s in [-\pi/2, -1.51] U [-0.06, 0.30] U [1.26, \pi/2] at the 68% confidence level, in agreement with the standard model expectation. Assuming the standard model value of \beta_s, we also determine \Delta\Gamma_s = 0.068 +- 0.026 (stat) +- 0.009 (syst) ps-1 and the mean B0_s lifetime, \tau_s = 1.528 +- 0.019 (stat) +- 0.009 (syst) ps, which are consistent and competitive with determinations by other experiments.Comment: 8 pages, 2 figures, Phys. Rev. Lett 109, 171802 (2012