Isolation and Characterization of Thermophilic Bacteria from a Hot Spring in the State of Hidalgo, Mexico, and Geochemical Analysis of the Thermal Water.

Hot springs worldwide can be a source of extremophilic microorganisms of biotechnological interest. In this study, samplings of a hot spring in Hidalgo, Mexico, were conducted to isolate, identify, and characterize morphologically, biochemically, and molecularly those bacterial strains with potential industrial applications. In addition, a physicochemical and geochemical examination of the hot spring was conducted to fully understand the study region and its potential connection to the strains discovered. The hot spring was classified as sulfate-calcic according to the Piper Diagram; the hydrogeochemical analysis showed the possible interactions between minerals and water. Eighteen bacterial strains were isolated with optimal growth temperatures from 50 to 55 °C. All strains are Gram-positive, the majority having a rod shape, and one a round shape, and 17 produce endospores. Hydrolysis tests on cellulose, pectin, and xylan agar plates demonstrated enzymatic activity in some of the strains. Molecular identification through the 16S rDNA gene allowed classification of 17 strains within the Phylum Firmicutes and one within Deinococcus-Thermus. The bacterial strains were associated with the genera Anoxybacillus, Bacillus, Anerunibacillus, Paenibacillus, and Deinococcus, indicating a diversity of bacterial strains with potential industrial applications.

NaCl Modifies Biochemical Traits in Bacterial Endophytes Isolated from Halophytes: Towards Salinity Stress Mitigation Using Consortia.

Bacterial endophytes (120) were isolated from six halophytes (Distichlis spicata, Cynodon dactylon, Eragrostis obtusiflora, Suaeda torreyana, Kochia scoparia, and Baccharis salicifolia). These halophiles were molecularly identified and characterized with or without NaCl conditions. Characterization was based on tests such as indole acetic acid (IAA), exopolysaccharides (EPS), and siderophores (SID) production; solubilization of phosphate (P), potassium (K), zinc (Zn), and manganese (Mn); mineralization of phytate; enzymatic activity (acid and alkaline phosphatase, phytases, xylanases, and chitinases) and the mineralization/solubilization mechanisms involved (organic acids and sugars). Moreover, compatibility among bacteria was assessed. Eleven halophiles were characterized as highly tolerant to NaCl (2.5 M). The bacteria isolated were all different from each other. Two belonged to Bacillus velezensis and one to B. pumilus while the rest of bacteria were identified up to the genus level as belonging to Bacillus, Halobacillus, Halomonas, Pseudomonas, Nesterenkonia, and three strains of Oceanobacillus. The biochemical responses of nutrient solubilization and enzymatic activity were different between bacteria and were influenced by the presence of NaCl. Organic acids were involved in P mineralization and nutrient solubilization. Tartaric acid was common in the solubilization of P, Zn, and K. Maleic and vanillic acid were only detected in Zn and K solubilization, respectively. Furthermore, sugars appeared to be involved in the solubilization of nutrients; fructose was detected in the solubilization tests. Therefore, these biochemical bacterial characteristics should be corroborated in vivo and tested as a consortium to mitigate saline stress in glycophytes under a global climate change scheme that threatens to exacerbate soil salinity.

Histoplasmosis Beyond Human Immunodeficiency Virus (HIV): Clinical Characteristics and Outcomes in a Non-HIV Population.

Histoplasmosis is an endemic and invasive mycosis caused by Histoplasma capsulatum. We conducted a retrospective study comparing immunosuppressed patients without human immunodeficiency virus (HIV) with a historical cohort of people with HIV and histoplasmosis. We included 199 patients with proven or probable histoplasmosis, of which 25.1% were people without HIV. Diabetes mellitus, chronic kidney disease, hematologic neoplasms, rheumatologic diseases, and transplantations were more frequent among people without HIV (P < .01). Forty-four percent of immunocompromised patients without HIV died within the first 6-week period following their diagnosis. A high suspicion index for histoplasmosis should be kept in immunosuppressed patients.

Nirmatrelvir/ritonavir and remdesivir against symptomatic treatment in high-risk COVID-19 outpatients to prevent hospitalization or death during the Omicron era: a propensity score-matched study.

Background: Even though worldwide death rates from coronavirus disease 2019 (COVID-19) have decreased, the threat of disease progression and death for high-risk groups continues. Few direct comparisons between the available severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) antivirals have been made. Objective: We aimed to compare two SARS-CoV-2 antivirals (nirmatrelvir/ritonavir and remdesivir) against all-cause hospitalization or death. Design: This is a propensity score-matched cohort study. Methods: We included all high-risk outpatients with COVID-19 in a tertiary referral center in Mexico City from 1 January 2022 to 31 July 2023. The primary outcome was all-cause hospitalization or death 28 days after symptom onset. The secondary outcome was COVID-19-associated hospitalization or death 28 days after symptom onset. Logistic regression analysis for characteristics associated with the primary outcome and a multi-group comparison with Kaplan-Meier survival estimates were performed. Results: Of 1566 patients analyzed, 783 did not receive antiviral treatment, 451 received remdesivir, and 332 received nirmatrelvir/ritonavir. The median age was 60 years (interquartile range: 46-72), 62.5% were female and 97.8% had at least one comorbidity. The use of nirmatrelvir/ritonavir was associated with an absolute risk reduction of 8.8% and a relative risk reduction of 90% for all-cause hospitalization or death. The use of remdesivir was associated with an absolute risk reduction of 6.4% and a relative risk reduction of 66% for all-cause hospitalization or death. In multivariable analysis, both antivirals reduced the odds of 28-day all-cause hospitalization or death [nirmatrelvir/ritonavir odds ratio (OR) 0.08 - 95% confidence interval (CI): 0.03-0.19, remdesivir OR 0.29 - 95% CI: 0.18-0.45]. Conclusion: In high-risk COVID-19 outpatients, early antiviral treatment with nirmatrelvir/ritonavir or remdesivir was associated with lower 28-day all-cause hospitalization or death.

Nirmatrelvir/ritonavir and remdesivir against symptomatic treatment in high-risk COVID-19 outpatients In this study, we included high-risk non-hospitalized patients with confirmed mild COVID-19. We compared those who received antiviral treatment (nirmatrelvir/ritonavir or remdesivir) against those who only received symptomatic treatment. The aim was to detect differences in hospitalization or death 28 days after symptom onset. We analyzed 1566 patients: 783 did not receive antiviral treatment, 451 received remdesivir, and 332 received nirmatrelvir/ritonavir. Most patients were female and over 60 years old. The most common comorbidities were chronic hypertension (44%), diabetes mellitus (26%), and autoimmune diseases (25%); systemic immunosuppression was registered in 35% of patients. Hospitalization or death 28 days after symptom onset occurred in 168 patients (136 in the symptomatic treatment group, 27 in the remdesivir group, and 5 in the nirmatrelvir/ritonavir group). Considering multiple variables like age, sex, comorbidities, and previous vaccination, both antivirals significantly reduced the odds of hospitalization or death (nirmatrelvir/ritonavir odds ratio 0.08, 95% confidence interval 0.03-0.19; remdesivir odds ratio 0.29, 95% confidence interval 0.18-0.45).

Inteligencia artificial. Aplicación en las imágenes cardiovasculares y la prevención cardiovascular / Artificial Intelligence in Cardiovascular Imaging and Cardiovascular Prevention

RESUMEN La inteligencia artificial (IA) está basada en programas computacionales que pueden imitar el pensamiento humano y automatizar algunos procesos. En el ámbito médico se está estudiando hace más de 50 años, pero en los últimos años el crecimiento ha sido exponencial. El campo de las imágenes cardiovasculares es particularmente atractivo para aplicarla, dado que, guiadas por IA, personas no expertas pueden adquirir imágenes completas, automatizar procesos y mediciones, orientar diagnósticos, detectar hallazgos no visibles al ojo humano, realizar diagnósticos oportunistas de afecciones no buscadas en el estudio índice pero evaluables a través de las imágenes disponibles, o identificar patrones de asociación dentro de una gran cantidad de datos como fuente de generación de hipótesis. En el campo de la prevención cardiovascular, la IA se ha aplicado en diferentes escenarios con fines diagnósticos, pronósticos y terapéuticos en el manejo de algunos factores de riesgo cardiovascular, como las dislipidemias o la hipertensión arterial. Si bien existen limitaciones con el uso de la IA tales como el costo, la accesibilidad y la compatibilidad de los programas, la validez externa de los resultados en determinadas poblaciones, o algunos aspectos éticos-legales (privacidad de los datos), esta tecnología está en crecimiento vertiginoso y posiblemente revolucione la práctica médica actual.

ABSTRACT Artificial intelligence (AI) is based on computer programs that imitate human thinking and automate certain processes. Artificial intelligence has been studied in the medical field for over 50 years, but in recent years, its growth has been exponential. The field of cardiovascular imaging is particularly attractive since AI can guide non-experts in image acquisition, automate processes and measurements, guide diagnoses, detect findings not visible to the human eye, make opportunistic diagnoses of unexpected conditions in the index test, or identify patterns of association within a large amount of data as a source of hypothesis generation. In the field of cardiovascular prevention, AI has been used for diagnostic, prognostic, and therapeutic purposes in managing cardiovascular risk factors such as dyslipidemia and hypertension. While there are limitations to the use of AI, such as cost, accessibility, compatibility of programs, external validity of results in certain populations, and ethical-legal aspects such as data privacy, this technology is rapidly growing and is likely to revolutionize current medical practice.

A protocol for an overview of systematic reviews to map photodynamic inactivation evidence in different dental specialties.

This is a protocol for an overview to summarize the findings of Systematic Reviews (SR) dealing with Photodynamic Inactivation (PDI) for control of oral diseases. Specific variables of oral infectious will be considered as outcomes, according to dental specialty. Cochrane Database of Systematic Reviews (CDSR), MEDLINE, LILACS, Embase, and Epistemonikos will be searched, as well as reference lists. A search strategy was developed for each database using only terms related to the intervention (PDI) aiming to maximize sensitivity. After checking for duplicate entries, selection of reviews will be performed in a two-stage technique: two authors will independently screening titles and abstracts, and then full texts will be assessed for inclusion/exclusion criteria. Any disagreement will be resolved through discussion and/or consultation with a third reviewer. Data will be extracted following the recommendations in Chapter V of Cochrane Handbook and using an electronic pre-specified form. The evaluation of the methodological quality and risk of bias (RoB) of the SR included will be carried out using the AMSTAR 2 and ROBIS. Narrative summaries of relevant results from the individual SR will be carried out and displayed in tables and figures. A specific summary will focus on PDI parameters and study designs, such as the type and concentration of photosensitizer, pre-irradiation time, irradiation dosimetry, and infection or microbiological models, to identify the PDI protocols with clinical potential. We will summarize the quantitative results of the SRs narratively.

Cephalotin Versus Dicloxacillin for the Treatment of Methicillin-Susceptible Staphylococcus aureus Bacteraemia: A Retrospective Cohort Study.

BACKGROUND: First-line treatments for methicillin-susceptible S. aureus (MSSA) bacteraemia are nafcillin, oxacillin, or cefazolin. Regional shortages of these antibiotics force clinicians to use other options like dicloxacillin and cephalotin. This study aims to describe and compare the safety and efficacy of cephalotin and dicloxacillin for the treatment of MSSA bacteraemia. METHODS: This retrospective study was conducted in a referral centre in Mexico City. We identified MSSA isolates in blood cultures from 1 January 2012 to 31 December 2022. Patients ≥ 18 years of age, with a first episode of MSSA bacteraemia, who received cephalotin or dicloxacillin as the definitive antibiotic treatment, were included. The primary outcome was in-hospital all-cause mortality. RESULTS: We included 202 patients, of which 48% (97/202) received cephalotin as the definitive therapy and 52% (105/202) received dicloxacillin. In-hospital all-cause mortality was 20.7% (42/202). There were no differences in all-cause in-hospital mortality between patients receiving cephalotin or dicloxacillin (20% vs. 21%, p = 0.43), nor in 30-day all-cause mortality (14% vs. 18%, p = 0.57) or 90-day all-cause mortality (24% vs. 22%, p = 0.82). No severe adverse reactions were associated with either antibiotic. CONCLUSIONS: Cephalotin and dicloxacillin were equally effective for treating MSSA bacteraemia, and both showed an adequate safety profile.

Postpartum depression in adolescent mothers before and during COVID-19 and the role of self-esteem, maternal self-efficacy, and social support / Depresión posparto en madres adolescentes antes y durante la pandemia por COVID-19 el papel de la autoestima, la autoeficacia materna y el apoyo social

Abstract Introduction Although the COVID-19 pandemic negatively impacted the mental health of vulnerable populations, such as adolescent mothers, very few studies have documented the prevalence of postpartum depression (PPD) in this population. Objective a) Determine the frequency of PPD (Edinburgh Postnatal Depression Scale [EPDS] ≥ 9) in adolescent mothers before (AM-BP) and during (AM-DP) the pandemic, b) Examine psychosocial factors (self-esteem, maternal efficacy, social support, depression and anxiety in pregnancy, planned and wanted pregnancy) in AM-BP and AM-DP, and c) Determine whether being an AM-DP was a significant factor for experiencing PPD (EPDS ≥ 9). Method Cross sectional study. Subjects: Forty-one AM-BP recruited at Health Centers and interviewed face to face and forty-one AM-DP surveyed online. Results PPD (EPDS ≥ 9) was 42% (p = .001) more frequent in AM-DP. The groups differed significantly in all psychosocial factors, with AM-DP faring worse. Unadjusted regressions showed that being an AM-DP, having lower maternal efficacy and self-esteem, greater dissatisfaction with social support, and depression and/or anxiety in pregnancy increased PPD (EPDS ≥ 9). Adjusted multiple analysis indicated that lower self-esteem was the only factor to maintain its association with PPD (EPDS ≥ 9; p = .017). Discussion and conclusion The pandemic negatively affected PPD (EPDS ≥ 9) and psychosocial factors in AM-DP, as compared to AM-BP, with self-esteem being the main factor associated with PPD (EPDS ≥ 9). In situations of extreme stress as happened in the pandemic, the mental health of adolescent mothers should be prioritized to prevent negative effects such as PPD. PPD preventive and treatment interventions should consider strengthening self-esteem.

Resumen Introducción La pandemia por COVID-19 tuvo un impacto negativo en la salud mental de poblaciones vulnerables, como las madres adolescentes, no obstante, escasos estudios documentaron la prevalencia de depresión posparto (DPP) en esta población. Objetivo a) Conocer la frecuencia de DPP (Escala Edinburgh para la Depresión Postnatal [EPDS] ≥ 9) en madres adolescentes antes de la pandemia (MA-AP) y durante la pandemia (MA-DP), b) Examinar algunos factores psicosociales (autoestima, eficacia materna, apoyo social, depresión y ansiedad en el embarazo, embarazo planeado y deseado) en MA-AP y MA-DP, y, c) Analizar si ser MA-DP, fue un factor significativo para experimentar DPP (EPDS ≥ 9). Método Estudio transversal. Participantes: 41 MA-AP captadas en Centros de Salud y 41 MA-DP encuestadas en línea. Resultados La DPP (EPDS ≥ 9) fue 42% (p = .001) más frecuente en las MA-DP. Los grupos difirieron significativamente en todos los factores psicosociales, en detrimento de las MA-DP. Las regresiones no ajustadas mostraron que ser MA-DP, tener menor eficacia materna y autoestima, mayor insatisfacción con el apoyo social, y depresión y/o ansiedad en el embarazo incrementaron la DPP (EPDS ≥ 9). El análisis múltiple ajustado indicó que una menor autoestima fue el único factor que mantuvo su asociación con DPP (EPDS ≥ 9; p = .017). Discusión y conclusión La pandemia tuvo un efecto negativo en la DPP (EPDS ≥ 9) y en factores psicosociales en MA-DP; la autoestima fue el principal factor asociado a la misma. Ante situaciones de estrés extremo, la salud mental de madres adolescentes debería ser prioritaria para prevenir efectos negativos como la DPP. Intervenciones preventivas y de tratamiento de DPP deben fortalecer la autoestima.

Bacterial microbiota shifts in vacuum-packed beef during storage at different temperatures: Impacts on blown pack spoilage.

We aimed to evaluate the bacterial growth and diversity in vacuum-packed beef bags stored at different temperatures and to monitor blown-pack spoilage. We used culture-based methods and high-throughput sequencing to study the development of the main bacterial groups naturally present in beef stored at 4 and 15 °C for 28 days. The growth of sulfite-reducing clostridium (SRC) was impaired in beef bags stored at 4 °C; significant differences among SRC counts were observed in beef bags stored at 4 and 15 °C on days 14, 21, and 28 (P = 0.001). Blown pack was observed in most beef bags stored at 15 °C, from day 14 to day 28, but not in beef bags stored at 4 °C. A storage temperature of 4 °C was able to maintain a stable bacterial microbiota (most prevalent: Photobacterium, Hafnia-Obesumbacterium, and Lactococcus). Remarkable changes in microbial abundance occurred at 15 °C from day 14 to day 28, with a predominance of strict anaerobes (Bacteroides) and the presence of Clostridium spp. The relative frequencies of strict anaerobes and Clostridium were statistically higher in the beef bags stored at 15 °C (P < 0.001 and P = 0.004, respectively). The temperature influenced the microbial counts and relative abundance of spoilage bacteria, leading to blown pack spoilage.

Integrating Dermoscopic Images into PACS Using DICOM and Modality Worklist.

Dermatology is one of the medical fields outside the radiology service that uses image acquisition and analysis in its daily medical practice, mostly through digital dermoscopy imaging modality. The acquisition, transfer, and storage of dermatology images has become an important issue to resolve. We aimed to describe our experience in integrating dermoscopic images into PACS using DICOM as a guide for the health informatics and dermatology community. During 2022 we integrated the video dermoscopy equipment through a strategic plan with an 8-step procedure. We used the DICOM standard with Modality Worklist and Storage commitment. Three systems were involved (video dermoscopy software, the EHR, and PACS). We identified critical steps and faced many challenges, such as the lack of a final model of DICOM standard for dermatology images.

Photobiomodulation therapy (red/NIR LEDs) reduced the length of stay in intensive care unit and improved muscle function: A randomized, triple-blind, and sham-controlled trial.

CONTEXT: Photobiomodulation therapy (PBMT) has been widely used to improve strength, fatigue resistance and increase muscle mass in healthy individuals. These effects could help critically ill patients admitted to intensive care units (ICUs) who show reduced mobility and muscle strength. ICU-acquired weakness lessens overall health and increases the patient's length of stay in the ICU. OBJECTIVE: This study evaluated the effects of PBMT using low intensity light-emitting diodes (LEDs) on the mobility and muscle strength (functional capacity) and length of stay of patients admitted to hospital ICU. METHODS: This randomized, triple-blind, sham-controlled trial was conducted in a hospital ICU. Sixty patients were randomly assigned to two equal groups: (a) PBMT and (b) Sham. PBMT was applied daily to patients until their discharge from the ICU, using a flexible neoprene array of 264 LEDs (120 at 635 nm, 1.2 mW each; 144 at 880 nm, 15 mW each) for 90s (207.36 Joules) at each site. Ten sites were located bilaterally on the thighs, legs, arms, and forearms ventrally and dorsally, 15 min totaling 2,073.6 Joules per session. Outcomes were length of stay (in h) until discharge from the ICU, muscle strength by the Medical Research Council (MRC) score and handgrip dynamometry (HGD), patient mobility by Intensive Care Unit Mobility Scale (IMS) and the Simplified Acute Physiology Score 3 (SAPS 3) for predicting mortality of patients admitted to the ICU. RESULTS: PBMT reduced the average length of stay in the ICU by ~30% (p = 0.028); increased mobility (IMS: 255% vs. 110% p = 0.007), increased muscle strength (MRC: 12% vs. -9% p = 0.001) and HGD (34% vs. -13% p < 0.001), and the SAPS3 score was similar (p > 0.05). CONCLUSION: The results suggest that daily PBMT can reduce the length of stay of ICU patients and increase muscle strength and mobility.

Labor gymnastics in health professionals: a systematic review / Gimnasia laboral para profesionales de la salud: una revisión sistemática / Ginástica laboral em profissionais de saúde: uma revisão sistemática

ABSTRACT This aimed to systematically review randomized controlled trials and compare the effectiveness of labor gymnastics with that of no intervention, minimal intervention or other types of intervention in healthcare workers, in relation to musculoskeletal pain, stress, physical disability, and absence from work. A search was carried out in the PUBMED, Pedro, EMBASE, CENTRAL, CINAHAL, PSYCHINFO, NIOSHTIC-2, SPORT DICUS, SCIELO, and LILACS databases. In total, 3,598 articles were found, seven of which were eligible for the study. There was a statistical difference in musculoskeletal pain in favor of labor gymnastics after 5, 10 and 12 weeks (MD: −0.63; 95%, CI: −1.17; −0.08) and 6, 9 and 12 months of intervention (MD: −0.74; 95% CI: −1.43; −0.05). There was also a statistical difference in favor of labor gymnastics in terms of time off work (MD: −3.26; 95% CI: −6.28; −0.25) and stress (SMD: −0.35; 95% CI: −0.67; −0.03) in studies in which interventions were carried out for 5 and 10 weeks. Labor gymnastics can contribute to the physical and mental health of healthcare professionals. However, more randomized controlled studies with a larger sample size and aimed at this professional category are needed.

RESUMEN Este estudio tuvo por objetivo realizar una revisión sistemática de los ensayos aleatorizados controlados y comparar la efectividad de la gimnasia laboral con ninguna intervención, con intervención mínima u otros tipos de intervención en los profesionales de la salud con relación a dolor musculoesquelético, estrés, incapacidad física y baja laboral. Se realizaron búsquedas en las bases de datos PUBMED, PEDro, EMBASE, CENTRAL, CINAHAL, PsycINFO, NIOSHTIC-2, SPORTDicus, SciELO y LILACS. Se encontraron 3.598 artículos, de los cuales siete fueron elegibles. Hubo una diferencia estadística para el dolor musculoesquelético a favor de la gimnasia laboral después de 5, 10 y 12 semanas (MD: −0,63; 95% CI: −1,17; −0,08) y 6,9 y 12 meses de intervención (MD: −0,74; 95% CI: −1,43; −0,05). También hubo una diferencia estadística a favor de la gimnasia laboral para el tiempo de baja laboral (MD: −3,26; 95% IC: −6,28; −0,25) y la reducción del estrés (SMD: −0,35; 95% IC: −0,67; −0,03) en los estudios que realizaron la intervención entre cinco y diez semanas. La gimnasia laboral puede contribuir a la salud física y mental de los profesionales de la salud, sin embargo, son necesarios más estudios aleatorizados controlados dirigidos a esta categoría profesional y con un mayor tamaño muestral para confirmar esta hipótesis.

RESUMO Este estudo tem como objetivo revisar sistematicamente ensaios randomizados controlados e comparar a eficácia da ginástica laboral com nenhuma intervenção, intervenção mínima ou outros tipos de intervenção em trabalhadores de saúde, em relação à dor musculoesquelética, estresse, incapacidade física e afastamento do trabalho. Foram realizadas buscas nas bases de dados PUBMED, PEDro, EMBASE, CENTRAL, CINAHAL, PsycINFO, NIOSHTIC-2, SPORTDicus, SCIELO e LILACS. Foram encontrados 3598 artigos, sendo sete elegíveis. Houve diferença estatística para dor musculoesquelética a favor da ginástica laboral após 5, 10 e 12 semanas (MD: −0,63; 95%, CI: −1,17; −0,08) e 6,9 e 12 meses de intervenção (MD: −0,74; 95% CI: −1,43; −0,05). Também foi verificada diferença estatística a favor da ginástica laboral para o afastamento no trabalho (MD: −3,26; 95% IC: −6,28; −0,25) e para redução do estresse (SMD: −0.35; 95% IC: −0,67; −0.03) nos estudos que realizaram intervenção por 5 e 10 semanas. A ginástica laboral pode contribuir para a saúde física e mental do profissional de saúde, no entanto, mais estudos randomizados controlados voltados para essa categoria profissional, e com maior valor amostral, são necessários para confirmação dessa hipótese.

Bleaching gel volume influences hydrogen peroxide diffusion, inflammation, and the presence of nitric oxide in the pulp tissue: in vitro and in vivo model.

OBJECTIVE: To assess whether bleaching gel volume influences chromatic changes, hydrogen peroxide (HP) diffusion, inflammation, and oxidative stress in the pulp tissue. METHODOLOGY: A total of 60 bovine teeth were divided into four groups, according to bleaching gel volume (n=15): without gel (WG); V30 (30 µL of 35% HP); V60 (60 µL); and V120 (120 µL). HP diffusion analysis was performed in the first session (T1). Chromatic changes (ΔE, ΔE00, and WID) were assessed after the first (T1), second (T2), third (T3) sessions, and 15 d (T4) after the end of treatment. Moreover, 20 rats were randomly divided into four groups (n=10) and their upper first molars were treated with different gel volumes: control (no treatment); V2 (2 µL of 17.5% HP); V4 (4 µL); and V8 (8 µL). After 24 h, rats were euthanized and the specimens processed for histological and immunohistochemical (nitric oxide synthase) evaluation. Data were analyzed using the Wilcoxon and Mann-Whitney tests (p<0.05). RESULTS: In vitro (bovine teeth), chromatic changes were not influenced by bleaching gel volume, showing similar values in all groups and sessions, except for the control group (p<0.05). The V120 group had the highest HP diffusion values (p<0.05). In vivo (pulp tissue), the V4 and V8 groups showed the highest inflammatory infiltrate in the pulp and significant oxidative stress (p<0.05). CONCLUSION: The adverse effects on the dental pulp related to HP diffusion, pulp inflammation, and oxidative stress depend on bleaching gel volume, while the bleaching effect is not proportional to the volume used.

NR3C1 and NR3C2 Genes Increase the Risk of Suicide Attempt in Psychiatric Disorder Patients with History of Childhood Trauma.

Background: Hypothalamic-pituitary-adrenal axis gene variants and childhood trauma (CT) are considered risk factors for suicide attempt (SA). The aim of the present study was analyzed gene x environment (GxE) interaction of NR3C1, NR3C2, and CT, and NR3C1 and NR3C2 gene expression in the development of SA with CT. Participants and Methods: A total of 516 psychiatric Mexican patients from Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz. Among them, 274 had SA at least once and 242 had not SA. Genetic variants of NR3C1 and NR3C2 were genotyped in all the patients, of which were obtained the CT information from medical records. Additionally, the gene expression of NR3C1 and NR3C2 was also analyzed for a subsample of 96 patients, obtaining the TC information from Childhood Trauma Questionnaire (CTQ). Results: The analysis showed a GxE interaction of NR3C1, NR3C2, and CT (OR=2.8, 95% CI [1.9-3.9], p<0.0001). Interactions were also observed with neglect (OR=2.1, 95% CI [1.4-3.1], p<0.0001), emotional abuse (OR=2.1, 95% CI [1.5-3], p<0.0001), and sexual abuse (OR=2.4, 95% CI [1.4-2.9], p<0.0001) in the prediction of SA. The analysis of gene expression identified an overexpression of NR3C1 in SA patients with high scores for physical and sexual abuse (p<0.0001; p<0.0006, respectively) and emotional neglect (p=0.014). An underexpression was observed of NR3C2, associated with high scores of trauma subtypes (p<0.0001) except physical neglect. Additionally, we observed an overexpression of NR3C1 gene in patients with SA carriers of A allele of rs6191 (p=0.0015). Also, overexpression of NR3C1 gene in carriers of G allele of rs6198 and underexpression of NR3C2 gene in carriers of G allele of rs5522 (p<0.0001). Conclusion: Our findings suggest that genetic variants of NR3C1 and NR3C2 differentially affect expression levels, increasing the susceptibility to SA in psychiatric patients with a history of CT.

A dataset of skin lesion images collected in Argentina for the evaluation of AI tools in this population.

In recent years, numerous dermatological image databases have been published to make possible the development and validation of artificial intelligence-based technologies to support healthcare professionals in the diagnosis of skin diseases. However, the generation of these datasets confined to certain countries as well as the lack of demographic information accompanying the images, prevents having a real knowledge of in which populations these models could be used. Consequently, this hinders the translation of the models to the clinical setting. This has led the scientific community to encourage the detailed and transparent reporting of the databases used for artificial intelligence developments, as well as to promote the formation of genuinely international databases that can be representative of the world population. Through this work, we seek to provide details of the processing stages of the first public database of dermoscopy and clinical images created in a hospital in Argentina. The dataset comprises 1,616 images corresponding to 1,246 unique lesions collected from 623 patients.

Alternative products in tropical treatment of radiation induced xerostomia: a systematic review / Produtos alternativos no tratamento tópico da xerostomia radioinduzida: uma revisão sistemática

Xerostomia, a term used to characterize the sensation of dry mouth, it is one of the most common symptoms after radiotherapy treatment of the head and neck region, being also the most expensive, impacting the oral health and quality of life of these patients. We performed a systematic review to identify topical treatments of natural composition in patients with radiation induced xerostomia. Searches were carried out in electronic databases such as the databases consulted were Cochrane library, PubMed (MEDLINE) and Latin American and Caribbean Literature in Health Sciences ­ LILACS. The research was carried out from June to July 2022 the period admitted for the results were from 1990 to 2022. We included trials of topical interventions with natural composition such, medicinal mucilage, sprays, oils and chewing gums for the management of dry mouth symptom. Results: 6 studies fully met the desired criteria, totalizing 336 patients. The therapies based on natural products were compared with placebo or other treatments and the forms of presentation were spray, oil, medicinal mucilage, and gel. In general, there was an improvement in some signs and symptoms of xerostomia and the most described adverse effect was nausea. Natural composition products seem to be a good alternative therapy for the relief of xerostomia symptoms and their consistency and form of application seem to exert influence, as evidence is still scarce, more randomized and placebo-controlled clinical studies are needed.

A xerostomia é o termo utilizado para caracterizar a sensação de boca seca, sendo um dos sintomas mais comuns após o tratamento radioterápico da região de cabeça e pescoço e também o mais oneroso, impactando na saúde bucal e na qualidade de vida desses pacientes. Realizamos uma revisão sistemática para identificar tratamentos tópicos de composição natural em pacientes com xerostomia induzida por radiação. As buscas foram realizadas em bases de dados eletrônicas, sendo que as bases de dados consultadas foram a biblioteca Cochrane, PubMed (MEDLINE) e Literatura Latino-Americana e do Caribe em Ciências da Saúde ­ LILACS. A pesquisa foi realizada de junho a julho de 2022, o período admitido para os resultados foi de 1990 a 2022. Incluímos ensaios de intervenções tópicas com composição natural como mucilagem medicinal, sprays, óleos e gomas de mascar para o manejo do sintoma de boca seca. Nos resultados 6 estudos preencheram totalmente os critérios desejados, totalizando 336 pacientes. As terapias baseadas em produtos naturais foram comparadas com placebo ou outros tratamentos e as formas de apresentação foram spray, óleo, mucilagem e gel. Em geral, houve melhora de alguns sinais e sintomas da xerostomia e o efeito adverso mais descrito foi a náusea. Os produtos de composição natural parecem ser uma boa alternativa terapêutica para o alívio dos sintomas da xerostomia e sua consistência e forma de aplicação parecem exercer influência, como as evidências ainda são escassas, são necessários mais estudos clínicos randomizados e controlados por placebo.

Brazilian dental consensus on dental management in hematopoietic stem cell transplantation− Part I− pre-HSCT

ABSTRACT The oral involvement in the Hematopoietic Stem Cell Transplantation is well described in the literature. The goal of the dental treatment and management of the oral lesions related to the HSCT is to reduce the harm caused by preexisting oral infection or even the worsening of oral acute/chronic GVHD and late effects. The aim of this guideline was to discuss the dental management of patients subjected to HSCT, considering three phases of the HSCT: pre-HSCT, acute phase, and late phase. The literature published from 2010 to 2020 was reviewed in order to identify dental interventions in this patient population. The selected papers were divided into three groups: pre-HSCT, acute and late, and were reviewed by the SBTMO Dental Committee's members. When necessary, an expertise opinion was considered for better translating the guideline recommendations to our population dental characteristics. This manuscript focused on the pre-HSCT dental management. The objective of the pre-HSCT dental management is to identify possible dental situations that On behalf of the Dental Committee of the Brazilian Society of Gene Therapy and Bone Marrow Transplantation (SBTMO) can worsening during the acute phase after the HSCT. Each guideline recommendations were made considering the Dentistry Specialties. The clinical consensus on dental management prior to HSCT provides professional health caregivers with clinical setting-specific information to help with the management of dental problems in patients to be subjected to HSCT.

Brief report: Isospora gilvusi n. sp. (Apicomplexa: Eimeriidae) from the warbling vireo Vireo gilvus Vieillot (Passeriformes: Vireonidae) in Morelia, Mexico.

A new coccidian species, Isospora gilvusi n. sp. (Apicomplexa: Eimeriidae) collected from the warbling vireo Vireo gilvus, is reported from Morelia, Michoacán State, Mexico. Sporulated oöcysts of the new species are spherical to subspherical, 27-31 × 27-29 (30.1 × 28.4) µm, with a length/width (L/W) ratio of 1.1; one or two polar granules are present, but micropyle and oöcyst residuum are absent. Sporocyts are ovoid to drop-shaped, 16-17 × 11-12 (17.0 × 11.5) µm, with a L/W ratio of 1.7; Stieda and sub-Stieda bodies are both present, but para-Stieda body is absent; sporocyst residuum diffuse. At the histological study, endogenous stages were observed in the epithelial cells of the duodenum. This is the second species of Isospora recorded infecting a bird of the family Vireonidae in the New World.

Queratocisto odontogênico em maxila: relato de caso

Objetivo: Relatar o processo de diagnóstico e tratamento de um queratocisto odontogênico (QO) em seio maxilar e a sua importância na investigação e diagnóstico de Síndrome de Gorlin-Goltz (SGG). Relato de caso: Paciente do gênero feminino, 20 anos, apresentou-se no serviço de odontologia encaminhada pela equipe de genética médica para investigar a presença de QO para definição de diagnóstico de SGG. Foi realizada radiografia panorâmica e verificou-se a presença de alterações no trabeculado ósseo em tuberosidade maxilar do lado esquerdo. Por isso, foi solicitada a tomografia computadorizada de seios maxilares e encontrou-se uma lesão bem delimitada, ocupando quase completamente o seio maxilar esquerdo em íntimo contato com a raiz do dente 27. Portanto, foi realizada biópsia incisional da lesão, acompanhada da aspiração do conteúdo. Na aspiração foi obtido um conteúdo de característica caseosa sugestivo de queratina. O laudo histopatológico da lesão foi de cisto odontogênico. Com isso, foram realizados os procedimentos de exodontia do dente 27 e a enucleação da lesão em seio maxilar pela equipe da odontologia e da otorrinolaringologia, respectivamente, em centro cirúrgico. O laudo histopatológico confirmou a presença de QO, assim foi possível confirmar o diagnóstico da SGG pela equipe da genética médica. A paciente não apresentou sinais de recidiva e nem de novos QO após 2 anos do procedimento. Considerações finais: A SGG requer atenção odontológica especial, visto a alta taxa de QO nos pacientes com essa síndrome. Exame odontológico minucioso envolvendo exame clínico e exames radiográficos devem ser realizado nas consultas de seguimento.

Objective: To report the process of diagnosis and treatment of an odontogenic keratocyst (OK) in the maxillary sinus and its importance in the investigation and diagnosis of Gorlin-Goltz Syndrome (GGS). Case report: A 20-year-old female patient presented at the Dentistry and Stomatology service, referred by the Medical Genetics team to investigate the presence of OK to define the diagnosis of GGS. Panoramic radiography was performed and the presence of alterations in the bone trabeculae in the maxillary tuberosity on the left side was verified. For this reason, computed tomography of the maxillary sinuses was also requested and a well-defined lesion was found, occupying almost completely the left maxillary sinus in close contact with the root of tooth 27. Therefore, an incisional biopsy of the lesion was performed, accompanied by puncture of the same. In the puncture, a characteristic caseous content suggestive of keratin was obtained. The histopathological report of the lesion was described by the pathologist as an odontogenic cyst. With this, tooth extraction procedures for tooth 27 and enucleation of the lesion in the maxillary sinus were carried out by the dentistry and otorhinolaryngology teams, respectively, in a surgical center. The histopathological report confirmed the presence of OK, so it was possible to confirm the diagnosis of GGS by the medical genetics team. The patient showed no signs of recurrence or new OK after 2 years of the procedure. Final considerations: GGS requires special dental attention, given the high rate of OK in patients with this syndrome. A thorough dental examination involving clinical examination and radiographic examinations should be performed at follow-up visits.

Risk Factors Associated with the Development of Hospital-Acquired Infections in Hospitalized Patients with Severe COVID-19.

Recognition of risk factors for hospital-acquired infections (HAI) in patients with COVID-19 is warranted. We aimed to describe factors associated with the development of HAI in patients with severe COVID-19. We conducted a retrospective cohort study including all adult patients admitted with severe COVID-19 between March 2020 and November 2020. The primary outcome was HAI development. Bivariate and multiple logistic regression models were constructed. Among 1540 patients, HAI occurred in 221 (14%). A total of 299 episodes of HAI were registered. The most common HAI were hospital-acquired/ventilation-associated pneumonia (173 episodes) and primary bloodstream infection (66 episodes). Death occurred in 387 (35%) patients and was more frequent in patients with HAI (38% vs. 23%, p < 0.01). Early mechanical ventilation (aOR 18.78, 95% CI 12.56-28.07), chronic kidney disease (aOR 3.41, 95% CI 1.4-8.27), use of corticosteroids (aOR 2.95, 95% CI 1.92-4.53) and tocilizumab (aOR 2.68, 95% CI 1.38-5.22), age ≥ 60 years (aOR 1.91, 95% CI 1.27-2.88), male sex (aOR 1.52, 95% CI 1.03-2.24), and obesity (aOR 1.49, 95% CI 1.03-2.15) were associated with HAI. In patients with severe COVID-19, mechanical ventilation within the first 24 h upon admission, chronic kidney disease, use of corticosteroids, use of tocilizumab, age ≥ 60 years, male sex, and obesity were associated with a higher risk of HAI.