Prevalence of a Cefazolin Inoculum Effect Associated with blaZ Gene Types among Methicillin-Susceptible Staphylococcus aureus Isolates from Four Major Medical Centers in Chicago.

The efficacy of cefazolin with high-inoculum methicillin-susceptible Staphylococcus aureus (MSSA) infections remains in question due to therapeutic failure inferred as being due to an inoculum effect (InE). This study investigated the local prevalence of a cefazolin InE (CInE) and its association with staphylococcal blaZ gene types among MSSA isolates in the Chicago area. Four medical centers in Chicago, IL, contributed MSSA isolates. Cefazolin MICs (C-MIC) were determined at 24 h by the broth microdilution method using a standard inoculum (SI; 5 × 105 CFU/ml) and a high inoculum (HI; 5 × 107 CFU/ml). The CInE was defined as (i) a ≥4-fold increase in C-MIC between SI and HI and/or (ii) a pronounced CInE, i.e., a nonsusceptible C-MIC of ≥16 µg/ml at HI. PCR was used to amplify the blaZ gene, followed by agarose gel electrophoresis and sequencing to determine the gene type. Approximately 269 MSSA isolates were included. All but one isolate were susceptible to cefazolin at SI, and 97% remained susceptible at HI. A total of 196 isolates (73%) were blaZ positive, with the blaZ types led by gene type C (40%). CInE was seen in 45 blaZ-positive isolates (23%), with 44 (22%) presenting a ≥4-fold increase in C-MIC (SI to HI) and 5 (3%) a pronounced CInE. Four of the five met both definitions of CInE, two of which expressed the type A gene. The prevalence of a pronounced CInE associated with the type A blaZ gene from MSSA isolates in Chicago is low. Our predilection for cefazolin use, even early in the management of hospitalized MSSA infections, is tenable.

Improving time to optimal Staphylococcus aureus treatment using a penicillin-binding protein 2a assay.

The penicillin-binding protein 2a (PBP2a) assay is a quick, accurate and inexpensive test for determining methicillin susceptibility in Staphylococcus aureus. A pre-post-study design was conducted using a PBP2a assay with and without the impact of an antimicrobial stewardship intervention to improve time to optimal therapy for methicillin-susceptible and methicillin-resistant S. aureus isolates. Our results demonstrate significantly improved time to optimal therapy and support the use of a PBP2a assay as part of an programme for all healthcare facilities, especially those with limited resources.

The knowledge levels and opinions of biomedical students regarding the human papillomavirus quadrivalent (types 6, 11, 16, and 18) recombinant vaccine.

The objective of this research was to assess the knowledge levels and attitudes of all students enrolled in 1 biomedical university regarding the human papillomavirus quadrivalent (types 6, 11, 16, and 18) recombinant vaccine (Gardasil-Merck; the HPV vaccine). A survey of students from all 7 programs at the University was conducted in January 2009. A total of 1120 useable questionnaires were obtained. These programs included pharmacy, osteopathic medicine, physician assistant, physical therapy, occupational therapy, doctor of psychology, and master of biomedical sciences. Mean percentage correct on the HPV vaccine knowledge test was 73. Subjects scored highest on the question that asks whether the vaccine helps prevent cervical cancer (97% correct) and lowest on the one asking whether it helps prevent genital warts (41% correct). Eighty-eight percent thought that patients 18 years and older should be able to receive the HPV vaccine without parental consent. Only about 5% think that the vaccine would cause patients to become sexually active, or that it would cause patients to have unprotected sex. The results suggest that these students have reasonable but limited knowledge of the vaccine. Their positive attitudes suggest that they will likely recommend or provide the vaccine to their patients.

Massage therapy in outpatient pediatric chronic pain patients: do they facilitate significant reductions in levels of distress, pain, tension, discomfort, and mood alterations?

BACKGROUND AND OBJECTIVES: This study was designed to look at the efficacy of adjuvant massage therapy in children and adolescents who presented to a chronic pediatric pain clinic for management. METHODS: After Institutional Review Board approval and informed consent and assent was obtained, all pediatric patients who presented to the outpatient chronic pain clinic at Children's Memorial Hospital from July 2006 to May 2007 were invited to participate in a study that offered massage therapy as an adjunct to conventional pain treatment. Patients (n = 80 sessions, 57 patients) were asked to rate their levels of distress, pain, tension, discomfort, and degree of upset mood on a scale of 1-5 (e.g. for distress 1 = very calm; 5 = very distressed) before and after massage therapy. Paired t-tests were used to compare pre- and postmassage ratings and probability values were corrected for multiple comparisons using the Bonferroni procedure. RESULTS: After massage therapy, patients reported highly significant improvement in their levels of distress, pain, tension, discomfort, and mood compared with their premassage ratings (all t-values >6.1, ****P < 1 x 10(-8). To control for the possible effects of patients reporting improvements simply as a result of rating their symptoms, we collected control ratings before and after a comparable 'no intervention' time period in a subset of 25 patients. The 'no intervention' time period typically took place in the treatment room with the therapist present. Approximately 60% of the control ratings were obtained before the intervention and 40% were obtained after the massage therapy. None of the differences between the pre- and postratings associated with the 'no intervention' control time period were significant. In these same patients, the difference between the pre- and postmassage ratings were significant, all t-values >3.8, **P < 0.001.