Antimicrobial Stewardship Knowledge, Attitudes, and Practices among Health Care Professionals at Small Community Hospitals.

Background: Very little is known about antimicrobial stewardship knowledge, attitudes, and practices (KAP) among health care practitioners in small, community hospitals (SCHs) compared to large community hospitals (LCHs). Objective: To compare infectious diseases (ID) clinical resources and describe KAP pertaining to antimicrobial stewardship among prescribers, pharmacists, and administrators from a large hospital network including a comparison between SCHs and LCHs. Methods: An anonymous 48-item antimicrobial stewardship KAP survey was administered to pharmacists, prescribers, and administrators at 15 SCH (<200 beds) and 5 LCHs (>200 beds) within an integrated health care network. Results: In total, 588 (14%) completed the survey: 198 from SCHs and 390 from LCHs. Most respondents were familiar or very familiar with the term antimicrobial stewardship and felt that antimicrobial stewardship was necessary. Most pharmacists and prescribers agreed that antimicrobials were overused at their hospital. However, SCH pharmacists and prescribers were more likely to disagree that antibiotic resistance is a significant problem locally. Pharmacists saw restrictions as a reasonable method of controlling antibiotic use more than prescribers. SCH practitioners were less familiar with IDSA guidelines and less likely to rely on ID specialists to a greater extent than LCH practitioners. Most respondents strongly agreed they would like more antimicrobial education. Conclusion: SCH and LCH pharmacists, prescribers, and administrators are aware of antimicrobial resistance and overuse and agree that antimicrobial stewardship programs are necessary. SCHs are less likely to contact ID for information. These results support the development of antimicrobial stewardship programs at SCHs, while recognizing the significant differences in availability and utilization of resources.

The relationship between motor deficit and hemisphere activation balance after stroke: A 3T fMRI study.

Functional imaging during movement of the hand affected by a stroke has shown excess activation of the contralesional motor network, implying less physiological hemisphere activation balance. Although this may be adaptive, the relationship between the severity of motor deficit and the hemisphere activation balance for the four major cortical motor areas has not been systematically studied. We prospectively studied 19 right-handed patients with first-ever stroke (age range 61+/-10 years) in the stable phase of recovery (>3 months after onset), using auditory-paced index-thumb (IT) tapping of the affected hand at 1.25 Hz as the fMRI paradigm. The hemisphere activation balance for the primary motor (M1), primary somatosensory (S1), supplementary motor (SMA) and dorsal premotor (PMd) areas was measured by a modified weighted laterality index (wLI), and correlations with motor performance (assessed by the affected/unaffected ratio of maximum IT taps in 15 s, termed IT-R) were computed. There were statistically significant negative correlations between IT-R and the wLI for M1 and S1, such that the more the hemispheric balance shifted contralesionally, the worse the performance. Furthermore, worse performance was related to a greater amount of contralesional, but not ipsilesional, activation. No significant correlation between IT-R and the wLI was obtained for the SMA and PMd, which functionally have stronger bilateral organization. These findings suggest that the degree of recovery of fine finger motion after stroke is determined by the extent to which activation balance in the primary sensory motor areas--where most corticospinal fibers originate--departs from normality. This observation may have implications for therapy.

The diffusion-weighted lesion in acute stroke: heterogeneous patterns of flow/metabolism uncoupling as assessed by quantitative positron emission tomography.

BACKGROUND: To investigate what the hyperintense lesion in diffusion-weighted imaging (DWI) of acute ischaemic stroke represents metabolically, we prospectively imaged acute carotid-territory stroke patients with DWI along with fully quantitative positron emission tomography (PET), which gives physiological maps of cerebral blood flow (CBF), the cerebral metabolic rate of oxygen (CMRO2) and the oxygen extraction fraction (OEF). METHOD: Of 10 patients who consented, 5 (3 males, 2 females, 53-84 years, NIHSS 6-16) completed the imaging protocol of back-to-back DWI and PET within 21 (mean 15.7, range 7-21) h of stroke onset. All images were co-registered with the DWI lesion forming a region of interest (ROI) that was transferred to the PET parametric maps (OEF, CBF, CMRO2). Patterns of blood flow and metabolism were assessed within the DWI ROI. RESULTS: Within the DWI lesions, the following patterns were observed: very low CBF and CMRO2/variable OEF; low CBF/high OEF, and high CBF/low OEF. There was a heterogeneity of patterns between and within DWI lesions. In addition, areas of hyperperfusion (with low OEF) and areas of hypoperfusion (with high OEF) were seen outside the DWI lesions. CONCLUSION: The DWI lesion does not have a single flow/metabolism counterpart, suggesting that it reflects various stages of the ischaemic process.