Champlainian series (Middle Ordovician) in Illinois

The Champlainian (Middle Ordovician) rocks of Illinois consist of a large number of widely distributed rock-stratigraphic units, some of which have not been previously described. In this study many of the formations and members were traced by lithologic criteria, supported in most cases by faunal evidence, from the Mississippi Valley east to New York, west to Colorado, north to Manitoba, and south to Tennessee. Conditions of sedimentation during the Champlainian were remarkably uniform over much of the stable interior part of the continent.Ope

Guidebook for the sixteenth annual field conference of the Tri-State Geological Society / Illinois State Geological Survey guidebook series, vol. 2

Cover title."Illinois, Iowa, Wisconsin - 1933"--Cover."October 11 and 12, 1952."Includes bibliographical references (l. 9)

Sensitivity testing of a UHF power transformer monitoring system

Paper reports on sensitivity testing of a UHF power transformer monitoring system

Occurrence of barite in the LaSalle limestone of Illinois

"Reprinted from the Transactions of the Illinois State Academy of Science, vol. 44, pp. 85-128, 137-151, 1951."Includes bibliographical references

Partitioned Bremer support and multiple trees

The definitive version is available at www.blackwell-synergy.comPartitioned Bremer support (PBS) is a valuable means of assessing congruence in combined data sets, but some aspects require clarification. When more than one equally parsimonious tree is found during the constrained search for trees lacking the node of interest, averaging PBS for each data set across these trees can conceal conflict, and PBS should ideally be examined for each constrained tree. Similarly, when multiple most parsimonious trees (MPTs) are generated during analysis of the combined data, PBS is usually calculated on the consensus tree. However, extra information can be obtained if PBS is calculated on each of the MPTs or even suboptimal trees.Christine L. Lambkin, Michael S.Y. Lee, Shaun L. Winterton and David K. Yeate

Factors associated with early resumption of condomless anal sex among men who have sex with men after rectal chlamydia treatment

Background: The resumption of sexual activity shortly after commencing treatment for sexually transmitted infections (STIs) is poorly described despite contributing to onward transmission. With azithromycin remaining an option for rectal Chlamydia trachomatis, resuming sex too early after treatment may contribute to antimicrobial resistance because of exposure of newly acquired STIs to subinhibitory concentrations. Methods: Clinical and sexual behavioral data were collected from men participating in a trial assessing treatment efficacy for rectal chlamydia. Data were collected at recruitment and weekly for 3 weeks after commencing treatment. Outcome measures were resumption of any sexual activity or condomless receptive anal sex within 1, 2, or 3 weeks after commencing treatment. Generalized linear regression was used to calculate adjusted risk ratios (aRR) to identify associated factors. Results: Almost 1 in 10 men (9.5%; 95% confidence interval [CI], 7.2–12.1) resumed condomless receptive anal sex within 1 week of commencing treatment. This was associated with current preexposure prophylaxis use (aRR, 3.4; 95% CI, 2.5–4.8]) and having 9 or more sexual partners in the last 3 months (aRR, 3.2; 95% CI, 1.6–5.0). Most men (75.0%; 95% CI, 71.3–78.5) resumed any sexual activity within 3 weeks; this was associated with a greater number of sexual partners (4–8 partners; aRR, 1.2; 95% CI, 1.1–1.5; ≥9 partners; aRR, 1.5; 95% CI, 1.3–1.7). Conclusions: Resuming condomless receptive anal sex early after treatment may facilitate onward transmission and promote antimicrobial resistance for STIs. Although azithromycin remains a treatment option, this analysis highlights the need for new health promotion messages regarding early resumption of sex and continued surveillance for antimicrobial resistance.Andrew Lau, Fabian Y.S. Kong, Christopher K. Fairley, David J. Templeton, Janaki Amin, Mark A. Boyd, Catriona Bradshaw, Marcus Y. Chen, Basil Donovan, Carole Khaw, David A. Lewis, Anna McNulty, David G. Regan, Mahesh Ratnayake, Jane S. Hocking (and on behalf of all RTS investigators