Guidelines recommend that clinical laboratories perform phenotypic tests (nitrocefin-based test and penicillin 10-U [P10] or 1-U [P1] zone edge tests) to detect penicillinase in Staphylococcus aureus isolates. This study aimed to assess the prevalence of blaZ encoding penicillinase and perform various phenotypic tests in S. aureus isolates from Japan. We prospectively collected 200 methicillin-susceptible S. aureus isolates from June 2015 to January 2016 and performed six phenotypic tests (nitrocefin-based test, P10 zone edge test/P10 diffusion test, penicillin 2-U [P2] zone edge test/P2 diffusion test, and cloverleaf test) on each sample. We confirmed the presence of blaZ (two blaZ-positive isolates) using PCR. Using blaZ PCR as a standard, we observed a low sensitivity (50%) and positive predictive value (PPV, 50%) of the nitrocefin-based test, low PPV (18.2%) of the P10 zone edge test, low sensitivity (50%) of the P10 diffusion test, low PPV (50% and 22.2%) of the P2 zone edge test and P2 diffusion test, respectively, and low sensitivity (50%) of the cloverleaf test. These data suggest a low performance (sensitivity and PPV) of these six phenotypic tests because of the low prevalence (1%) of blaZ in S. aureus isolates from Japan.
Diffusion ; Japan* ; Penicillinase* ; Penicillins ; Polymerase Chain Reaction ; Prevalence* ; Prospective Studies ; Staphylococcus aureus* ; Staphylococcus*

Purpose: This study was to develop a scale to measure difficulties encountered by cancer care by nurses and to evaluate the reliability and the validity of the scale. Methods: Self-reported questionnaires were administered to nurses who are engaged in cancer care in Tohoku University Hospital. Results: Of 512 questionnaires distributed to nurses, 356 were completed and returned 70%. We selected 49 items in 6 domains, including "communication" "knowledge and skill" "collaboration with doctor" "disclosure and explanation of disease" "hospital system and regional alliances" and "death and dying" using explanatory factor analysis. Cronbach's α coefficient was 0.68 across domains and ranged from 0.69 to 0.74 for each domain. Construct validity was demonstrated and the scaling success rates were 100% for all domains on multitrait scaling analysis. In terms of the known groups validity, the score for the nurses in the palliative care unit was significantly lower than for nurses on the general wards. Conclusion: This study showed that the scale has sufficient reliability and validity. This scale may contribute to cancer nursing by assessing hospital nurses' perception of cancer care and as a method of determining outcomes of educational or organizational interventions.

The purposes of this study were to describe nurses’ difficulty with cancer care and explore factors related to the difficulty of cancer care. Self－reported questionnaires were distributed to 512 nurses who are engaged in cancer care at Tohoku University Hospital. Responses from 344 (67％) nurses were subjected to analysis. The results revealed that nurses felt that “communication” was the most difficult aspect of cancer nursing followed by “hospital system and regional alliances” and “knowledge and skill.” Nurses did not feel that “collaboration with doctors” “disclosure and explanation of disease” or “death and dying” had particularly high levels of difficulty, however, their levels of difficulty could be improved. Greater difficulty with cancer care was reported by nurses working on the general ward and nurses with limited cancer care experience in the last year. Communication skill training,education (especially for less experienced nurses), expansion of palliative care, and restructuring of discharge planning and regional collaboration systems might contribute to decreasing nurses’ difficulty with cancer care.

No study has described Streptococcus dysgalactiae subsp. equisimilis (SDSE) isolates that cause repetitive infections (recurrence and reinfection). We compared the microbiological characteristics of SDSE causing repetitive infections with those causing single infections. Three patients with invasive infections were identified based on their medical records, and multiple SDSE isolates were collected at intervals over three weeks, using a laboratory repository. Isolates from 12 patients with single-episode infections served as controls. Six isolates were collected from three patients with first and second episodes of infection. All isolates causing either repetitive or single-episode infection were subjected to emm typing, multilocus sequence typing (MLST), pulsed-field gel electrophoresis (PFGE), and random amplified polymorphic DNA (RAPD) analyses. Amplification of five virulence genes (sicG, prtF1, prtF2, lmb, and cbp), biofilm formation (BF), and cell invasion abilities (CIAs) were measured as virulent phenotypes. We observed close genetic similarities in the data obtained by emm typing, MLST, PFGE, and RAPD in four isolates from two patients, suggesting recurrence, whereas two isolates from one patient indicated genetic differences in these data, suggesting re-infection. The presence of the five virulence genes and the BF and CIA measurements appeared not to contribute to repetitive infections, compared with isolates causing single-episode infection. In conclusion, clinicians encountering patients with repetitive infections should be aware of both possibilities: recurrence with closely related strains and reinfection with different strains.
Biofilms ; DNA ; Electrophoresis, Gel, Pulsed-Field ; Humans ; Medical Records ; Multilocus Sequence Typing ; Phenotype ; Recurrence ; Streptococcus ; Virulence

Background: Comparative analysis of virulence factors (VFs) between Pasteurella canis and Pasteurella multocida are lacking, although both cause zoonotic infections. We determined the virulence-associated genome sequence characteristics of P. canis and assessed the toxin gene prevalence unique to P. canis among clinical isolates of P. canis and P. multocida. Methods: We selected 10 P. canis and 16 P. multocida whole-genome sequences (WGSs) from the National Center for Biotechnology database. The VFanalyzer tool was used to estimate P. canis-characteristic VFs. Amino acid sequences of VFs were compared with multiple-aligned sequences. The genome structure containing P. canis-characteristic and adjacent loci was compared to the corresponding P. multocida genome structure. After designing primer sequences and assessing their accuracy, we examined the gene prevalence of the P. canis-characteristic VFs using PCR among clinical isolates of P. multocida and P. canis. Results: Using VFanalyzer, we found virulence-associated cytolethal distending toxin (cdt)A–cdtB–cdtC loci common to all P. canis WGSs that were not found in P. multocida WGSs. Similarities in the multiple alignments of CdtA–CdtB–CdtC amino acid sequences were found among the 10 P. canis WGSs. Shared or similar loci around cdtA–cdtB–cdtC were identified between the P. canis and P. multocida genome structures. The PCR-based cdtA–cdtB–cdtC prevalence differed for P. canis and P. multocida clinical isolates. Conclusions P. canis-specific cdtA–cdtB–cdtC prevalence was identified among clinical isolates. These three loci may be unique toxin genes and promising targets for the rapid identification of P. canis in clinical settings.