Phenotypic Detection of Hemin-Inducible Trimethoprim-Sulfamethoxazole Heteroresistance in Staphylococcus aureus.

Trimethoprim-sulfamethoxazole (SXT) is a valuable second-line antimicrobial agent to treat methicillin-resistant Staphylococcus aureus infections. Discrepancies between various antibiotic susceptibility testing (AST) methods for SXT susceptibility in S. aureus have been described. Here, we describe a hemin-inducible heteroresistance phenotype in S. aureus. We compared the results of the Vitek 2 AST on a set of 95 S. aureus clinical isolates with broth microdilution, disk diffusion using standard Mueller-Hinton agar, and disk diffusion using Mueller-Hinton agar supplemented with 5% horse blood (MHF). To investigate the potential clinical relevance of SXT heteroresistance, an in vivo Galleria mellonella infection assay was performed. All Vitek 2 SXT-susceptible (n = 17) isolates were concordant with AST results by other methods applied in this study. In 32/78 (41%) of Vitek 2 SXT-resistant isolates, we observed a heteroresistant growth phenotype on MHF. The heteroresistance phenotype was associated with the presence of dfr genes, encoding trimethoprim resistance. The addition of a hemin-impregnated disk in a double disk diffusion method on standard Mueller-Hinton agar was able to induce growth in the SXT zone of inhibition. An in vivo infection assay with G. mellonella suggested that the SXT heteroresistance phenotype resulted in lethality similar to that of the SXT-resistant phenotype. In this study, we describe a novel hemin-inducible heteroresistance phenotype in S. aureus. This heteroresistance phenotype may be missed by standard AST methods but can be detected by performing disk diffusion using Mueller-Hinton agar supplemented with 5% horse blood, commonly used for AST of fastidious organisms. This phenomenon may partly explain the discrepancies of AST methods in determining SXT resistance in S. aureus. IMPORTANCE Staphylococcus aureus is one of most important pathogens in clinical medicine. Besides its virulence, the acquisition or emergence of resistance toward antibiotic agents, in particular to beta-lactam antibiotics (methicillin-resistant S. aureus [MRSA]), poses a major therapeutic challenge. Trimethoprim-sulfamethoxazole (SXT) is one of the effective antimicrobial agents of last resort to treat MRSA infections. Here, we report the detection of a SXT-heteroresistant phenotype which is inducible by hemin and can be detected using Mueller-Hinton agar supplemented with horse blood. Heteroresistance describes the presence or emergence of resistant subpopulations, which may potentially lead to inaccurate antibiotic susceptibility testing results and influence the success of antibiotic therapy.

Synchronous Telephone-Based Consultations in Teledentistry: Preliminary Experience of the Telehealth Brazil Platform.

Background: The Brazilian National Health System (NHS) has incorporated telehealth to improve the quality of care in recent decades. Among the actions taken, teleconsultations have been offered to support diagnosis and decision-making for health professionals. Methods: This cross-sectional study aimed to summarize the preliminary experience of a telephone-first consultation for oral health issues available for dentists and physicians from primary health care (PHC). Results: The study sample was 385 teleconsultations with oral health questions requested from all Brazil sent from May 2018 to July 2019, majority by dentists 83.2% (n = 332). Oral medicine was the main reason for teleconsultation (50.9%). Resolution in PHC was considered possible in 57.1% of cases (n = 220). Conclusions: It was concluded that a telephone-first consultation may be useful to improve the resolvability and the quality of care in the PHC on oral health issues. The teledentistry allows the resolution of oral issues in PHC, avoiding the displacement of patients to more distant specialized centers. Teledentistry could be more useful in the actual coronavirus disease (Covid-19) pandemic.

Synchronous teleconsultation in the management of temporomandibular disorder

ABSTRACT Purpose: to analyze synchronous teleconsultation as a support tool in the management of temporomandibular disorders in primary health care and to identify which factors have an impact on decisions about teleconsultation. Methods: retrospective study perfomed in TelessaúdeRS, between May 2018 to May 2020. This study used primary data from synchronous teleconsultation, requested by primary health care professionals and carried out by multiprofessional teleconsultants. The data collected were the information reported by the requester, the teleconsultant's suggestions and if there was referral of the patient for specialized care after teleconsultation. The statistical association was investigated between patient characteristics and decision of teleconsultation; and teleconsultation conduct suggestions and decision of teleconsultation, using Fisher's exact test and modeling was performed using binary logistic regression considering 5% of significance (p≤0.05). Results: during the period, 56 teleconsultations had a temporomandibular diagnostic hypothesis, these 79.2% patients were female and the average age was 43.7 years. In 59.1% of teleconsultations, primary care management was suggested, with 72.4% of patients being managed. An association was found between the decision of teleconsultation and referral to specialized care (p <000.1). The trauma report (p = 0.004) was associated with a greater chance of being referred for special care and suggestions for pharmacological (p <0.001) and non-pharmacological (p = 0.007) treatments were introduced among the teleconsultation managed in primary care. Conclusion: teleconsultation helped to manage the majority of temporomandibular disorder, streamlining care and having the potential to avoid unnecessary referrals to special care.

Health-related quality of life of maltreated children and adolescents who attended a service center in Brazil.

PURPOSE: This study's aim was to evaluate the health-related quality of life (HRQoL) and associated factors of maltreated children and adolescents. METHODS: This cross-sectional study consisted of individuals between 8 and 17 years of age who were victims of maltreatment. The KIDSCREEN-52 was used to measure their HRQoL. Socioeconomic and demographic data were collected, as well as information about the type of abuse, type of perpetrator, and psychological support adherence. The Kruskal-Wallis test was used to analyze the scores of the KIDSCREEN-52 by the independent variables. RESULTS: One hundred and thirteen victims answered the questionnaire. Girls and adolescents had a lower overall HRQoL score (p < 0.05). Children who suffered from sexual abuse had a lowest score on the moods and emotions dimension than children who suffered from physical abuse (p < 0.05). There was a lowest score on the autonomy dimension among the children who suffered maltreatment by an extrafamilial perpetrator than those who were victimized by an intrafamilial perpetrator (p < 0.05). A lower score on the psychological well-being was observed among the children who adhered to the psychological support program provided by the service compared to those who terminated the service before completion (p < 0.05). CONCLUSIONS: Adolescents and girls were associated with lower HRQoL scores. There was no association between the overall HRQoL score and the characteristics of the maltreatment; however, the type of abuse and the victim's relationship with the perpetrator were only related to some dimensions. These findings may assist maltreatment care providers in planning strategies to reduce the consequences that violence may cause.

Oral health-related quality of life in Brazilian child abuse victims: A comparative study.

This study aims to assess and compare Oral Health-Related Quality of Life (OHRQoL) in child abuse victims and non-abused children in a Southern Brazilian city. The study compared two independent samples of children aged 8-10 years: 48 child abuse victims recruited from a centre for Child and Adolescent Psychological Support (NACA) for abused children, and 144 public and private school students. Data collection consisted of administration of the Child Perceptions Questionnaire 8-10 (CPQ8-10) to measure OHRQoL (dependent variable), clinical examination (dental caries), and collection of socioeconomic and demographic information (age, sex, skin colour, family income, and type of school). Multiple linear regression models were used to assess the association between presence of abuse and OHRQoL and subscales. After adjustment for clinical and sociodemographic variables, child abuse victims were found to exhibit higher CPQ scores on the overall scale and on the oral symptoms and functional limitations subscales. In conclusion, child abuse victims have a higher impact on OHRQoL. Based on the results, it is possible to suggest that greater care should be taken of these children, not only in providing treatment for oral disorders, but also in providing interdisciplinary care.

Effectiveness of an oral health educational intervention for individuals with special health care needs from a southern Brazilian city.

AIM: To assess the effects of an oral health education strategy targeted at students with disabilities. METHODS: This quasi-experimental study included students aged 7 to 24 years. The intervention was conducted for 5 weeks and divided into 2 phases: (1) comprising supervised toothbrushing and educational activities to students; (2) verbal oral health instructions and oral hygiene demonstration targeted at the caregivers. A clinical examination was conducted to evaluate the dental debris and gingival bleeding before the intervention, and the Wilcoxon test was performed after phase 1 and 2 for comparisons between paired samples. RESULTS: A significant decrease in dental debris and gingival indices compared with baseline occurred after phase 1 (p < 0.05). After the meeting with caregivers (phase 2), there was significant decrease in the debris-index (p < 0.05). CONCLUSIONS: Providing a simple and short-term educational intervention to students with disabilities had a positive impact on their oral health.