Wet steam method for reducing attached cells of Salmonella and Listeria monocytogenes on Hass avocado.

The consumption of avocados and their products has been linked to outbreaks of illness caused by Salmonella enterica and Listeria monocytogenes. These pathogens have been isolated from avocados collected from farms and markets. After contact with the avocado epicarp, the cells of Salmonella and L. monocytogenes can become loosely attached (LA) by suspension in a film of water and attraction by electrostatic forces, or strongly attached (SA) by physical and irreversible attachment mechanisms. Attached cells may have greater resistance to agents used to decontaminate the fruit. The effect of applying wet steam (WS) to the epicarp of Hass avocados on the reduction LA and SA counts of Salmonella and L. monocytogenes was evaluated as a function of the exposure time. The inoculated avocados were washed and exposed to WS for 30, 45, and 60 s inside a treatment chamber. Salmonella was found to be more susceptible to WS than L. monocytogenes. The efficacy of steam in reducing LA and SA cell numbers was similar for both pathogens. Steaming avocados for 60 s reduced LA Salmonella and L. monocytogenes cells by 4.6 and 4.8 log CFU/avocado, whereas SA cells were decreased by 5.2 and 4.4 log CFU/avocado, respectively.•Steaming the avocados for 60 s produced the greatest reduction in loosely and strongly attached cells for both pathogens.•Wet steam treatment efficiently eliminated the loosely and strongly attached cells of both pathogens.•The Listeria monocytogenes attached cells showed greater resistance to steam treatment than Salmonella.

Immunostimulant effects of diet supplementation with yellow (Pouteria campechiana), white (Casimiroa edulis), and black (Diospyros digyna) sapote nanocapsules on laying hens: in vitro and in vivo study.

Poultry is commonly infected by different bacteria and parasites in the environment, resulting in increased morbidity and mortality, but immunostimulants have been enhancing non-specific defense mechanisms conferring laying hens' protection. For this purpose, the pulp of yellow (Pouteria campechiana), white (Casimiroa edulis), and black (Diospyros digyna) sapotes were nanoencapsulated (YWB-SN) and evaluated in laying hens' peripheral blood leukocytes to test their addition to the experimental diets at a concentration of 0.5% (5g/kg of dry food) for 1 month (with two samples at days 15 and 30). The YWB-SN were safe when exposed to peripheral blood leukocytes (PBLs). The in vitro experiment showed that these nanocapsules enhanced reactive oxygen species production, and B-SN stimulated phagocytosis activity. Concerning the proinflammatory cytokine (TNF-α) transcription, this gene was upregulated after W-SN stimulation, while B-SN upregulated the IgG gene expression significantly. IgM was upregulated with any YBW-SN in PBLs after 24 h of stimulation. The in vivo study showed a notable B-SN immunostimulation in serum and an upregulation of TNF-α, IgM, and IgG mRNA transcription. Therefore, this study provides a new result of the yellow, white, and black sapote nanocapsules as a functional food for the poultry industry, highlighting the black sapote Diospyros digyna immunostimulant effect.

Comportamiento de la morbimortalidad por virus de inmunodeficiencia humana/sida en Nuevitas, Camagüey, 1993-2021

Fundamento la infección por virus de inmunodeficiencia humana/sida es considerada la más temible de las infecciones de transmisión sexual. Los estudios relacionados con el tema permiten el acercamiento a los diferentes contextos y poblaciones afectadas por esta enfermedad. Objetivo determinar el comportamiento de la morbimortalidad relacionada con el virus de inmunodeficiencia humana/sida. Métodos se realizó un estudio descriptivo retrospectivo, en el municipio de Nuevitas, en el periodo 1993-2021, que incluyó a 92 pacientes diagnosticados con el virus de inmunodeficiencia humana/sida. Los datos fueron tomados del registro de casos de la Unidad Municipal de Higiene y Epidemiología, y de las historias epidemiológicas individuales. Las variables analizadas: año de diagnóstico, grupos de edades, sexo, estado civil, orientación sexual, forma de detección de la enfermedad y evolución. Resultados se observó una tendencia ascendente de casos hasta diciembre de 2021. El grupo etario más numeroso resultó el de 20-24 años, y predominó el sexo masculino. Al momento del diagnóstico de la enfermedad prevaleció el estado civil de soltero, así como la orientación sexual homosexual. Conclusiones de forma general, hubo una tendencia al ascenso de pacientes infectados, fundamentalmente de jóvenes solteros del sexo masculino, homosexuales; además, prevalecieron los seropositivos.

Foundation infection by human immunodeficiency virus/AIDS is considered the most fearsome of sexually transmitted infections. The studies related to the subject allow the approach to the different contexts and populations affected by this disease. Objective to determine the behavior of morbidity and mortality related to the human immunodeficiency virus/AIDS. Methods a retrospective descriptive study was carried out in the Nuevitas municipality, from 1993 to 2021, which included 92 patients diagnosed with the human immunodeficiency virus/AIDS. The data were taken from the case registry of the Municipal Hygiene and Epidemiology Unit, and from individual epidemiological histories. The analyzed variables: year of diagnosis, age groups, sex, marital status, sexual orientation, way of detecting the disease and evolution. Results an upward trend of cases was observed until December 2021. The most numerous age group was 20-24 years old, and the male sex predominated. At the disease time of diagnosis, the marital status of single prevailed, as well as the homosexual sexual orientation. Conclusions in general, there was a tendency to increase the number of infected patients, mainly young single men, homosexuals; in addition, seropositives prevailed.

Determining the Photoelectrical Behavior and Photocatalytic Activity of an h-YMnO3 New Type of Obelisk-like Perovskite in the Degradation of Malachite Green Dye.

YMnO3 is a P-type semiconductor with a perovskite-type structure (ABO3). It presents two crystalline systems: rhombohedral and hexagonal, the latter being the most stable and studied. In the hexagonal system, Mn3+ ions are coordinated by five oxygen ions forming a trigonal bipyramid, and the Y3+ ions are coordinated by five oxygen ions. This arrangement favors its ferroelectric and ferromagnetic properties, which have been widely studied since 1963. However, applications based on their optical properties have yet to be explored. This work evaluates the photoelectric response and the photocatalytic activity of yttrium manganite in visible spectrum wavelengths. To conduct this, a rod-obelisk-shaped yttrium manganite with a reduced indirect bandgap value of 1.43 eV in its hexagonal phase was synthesized through the precipitation method. The synthesized yttrium manganite was elucidated by solid-state techniques, such as DRX, XPS, and UV-vis. It was non-toxic as shown by the 100% leukocyte viability of mice BALB/c.

Nanohybrid of Thymol and 2D Simonkolleite Enhances Inhibition of Bacterial Growth, Biofilm Formation, and Free Radicals.

Due to the current concerns against opportunistic pathogens and the challenge of antimicrobial resistance worldwide, alternatives to control pathogen growth are required. In this sense, this work offers a new nanohybrid composed of zinc-layered hydroxide salt (Simonkolleite) and thymol for preventing bacterial growth. Materials were characterized with XRD diffraction, FTIR and UV-Vis spectra, SEM microscopy, and dynamic light scattering. It was confirmed that the Simonkolleite structure was obtained, and thymol was adsorbed on the hydroxide in a web-like manner, with a concentration of 0.863 mg thymol/mg of ZnLHS. Absorption kinetics was described with non-linear models, and a pseudo-second-order equation was the best fit. The antibacterial test was conducted against Escherichia coli O157:H7 and Staphylococcus aureus strains, producing inhibition halos of 21 and 24 mm, respectively, with a 10 mg/mL solution of thymol-ZnLHS. Moreover, biofilm formation of Pseudomonas aeruginosa inhibition was tested, with over 90% inhibition. Nanohybrids exhibited antioxidant activity with ABTS and DPPH evaluations, confirming the presence of the biomolecule in the inorganic matrix. These results can be used to develop a thymol protection vehicle for applications in food, pharmaceutics, odontology, or biomedical industries.

Asociación entre el tipo de papila duodenal mayor y canulación biliar difícil en centro terciario privado / Association between the type of major duodenal papilla and difficult biliary cannulation in a private tertiary center

RESUMEN Introducción : La canulación difícil en casos de colangiopancreatografía retrógrada endoscópica (CPRE) podría asociarse a diversos factores incluyendo el tipo de papila mayor, sin embargo, existen datos limitados con respecto a esta posible asociación. Objetivos : Determinar la asociación entre el tipo de papila y la canulación biliar difícil. Materiales y métodos : Se realizó un estudio retrospectivo transversal analítico en pacientes mayores de 18 años en quienes se realizó CPRE en papila virgen, de julio 2019 a abril 2021, en una institución privada. Se excluyeron las canulaciones frustras. La papila fue clasificada en base a la clasificación de Haraldsson. Se evaluó la asociación cruda y ajustada a posibles confusores entre el tipo de papila y canulación difícil. Se calcularon los riesgos relativo (RR) e intervalos de confianza al 95%. Resultados : Se incluyeron 188 pacientes. La edad media fue 55 años, el 66% de sexo femenino. La indicación más frecuente fue coledocolitiasis con 88,5%. El tipo de papila duodenal mayor más frecuente fue el tipo 1 (32%), seguido de tipo 3 (27%), tipo 2 (25%) y tipo 4 (16%). Las papilas tipo 2, 3, 4 presentaron una relación significativa con canulación difícil comparadas con la tipo 1 (p<0,001, p<0,001 y p=0,008 respectivamente). La indicación diferente a coledocolitiasis también mostró una relación significativa con canulación difícil (p<0,001). En el análisis ajustado, El RR para canulación difícil en comparación con la papila tipo 1 fue: de 2,51 (IC 95% 1,23-5,94) para la papila tipo 2, 3,72 (IC 95% 1,79-7,71) para la papila tipo 3 y 3,41 (IC 95% 1,54-7,71) para la tipo 4. La indicación distinta a la coledocolitiasis también se asoció a un mayor riesgo de canulación difícil con un RR de 2.36 (IC95% 1,57-3,56). El precorte tipo fistulotomía fue usado con mayor frecuencia en la papila tipo 3 (46%) mientras que el uso de canulótomo fue más frecuente en la papila tipo 4 (29,6%). Conclusiones : Los tipos de papila 2, 3 y 4, están asociados a mayor riesgo de canulación difícil. Ello debe ser considerado al momento de realizar la CPRE a fin de reducir el riesgo de complicaciones.

ABSTRACT Introduction : Difficult cannulation in cases of endoscopic retrograde cholangiopancreatography (ERCP) could be associated with several factors, including: type of major papilla, however, there are limited data regarding this possible association. Objectives : To determine the association between the type of papilla and difficult biliary cannulation. Materials and methods : A retrospective cross-sectional analytical study was conducted in patients over 18 years old who underwent ERCP on papilla naive, from July 2019 to April 2021, in a private institution. Unsuccessful cannulations were excluded. The papilla was classified based on Haraldsson classification. The crude association and adjusted for possible confounders between the type of papilla and difficult cannulation was evaluated. Relative risks (RR) and 95% confidence intervals were calculated. Results : 188 patients were included. The mean age was 55 years, 66% female. The most frequent indication was choledocholithiasis with 88.5%. The most frequent type of major duodenal papilla was type 1 (32%), followed by type 3 (27%), type 2 (25%) and type 4 (16%). Type 2, 3, 4 papillae showed a significant relationship with difficult cannulation compared to type 1 (p<0.001, p<0.001 and p=0.008 respectively). The indication other than choledocholithiasis also showed a significant relationship with difficult cannulation (p<0.001). In the adjusted analysis, the RR for difficult cannulation compared to type 1 papilla was: 2.51 (95% CI 1.23-5.94) for type 2 papilla, 3.72 (95% CI 1.79-7.71) for papilla type 3 and 3.41 (95% CI 1.54-7.71) for type 4. The indication other than choledocholithiasis was also associated with a higher risk of difficult cannulation with a RR of 2.36 (95% CI 1.57-3.56). The fistulotomy type precut was used more frequently in the type 3 papilla (46%), while the use of cannula was more frequent in the type 4 papilla (29.6%). Conclusions : Papilla types 2, 3 and 4 are associated with a higher risk of difficult cannulation. This should be considered when performing ERCP in order to reduce the risk of complications.

[Association between the type of major duodenal papilla and difficult biliary cannulation in a private tertiary center]. / Asociación entre el tipo de papila duodenal mayor y canulación biliar difícil en centro terciario privado.

INTRODUCTION: Difficult cannulation in cases of endoscopic retrograde cholangiopancreatography (ERCP) could be associated with several factors, including: type of major papilla, however, there are limited data regarding this possible association. OBJECTIVES: To determine the association between the type of papilla and difficult biliary cannulation. MATERIALS AND METHODS: A retrospective cross-sectional analytical study was conducted in patients over 18 years old who underwent ERCP on papilla naive, from July 2019 to April 2021, in a private institution. Unsuccessful cannulations were excluded. The papilla was classified based on Haraldsson classification. The crude association and adjusted for possible confounders between the type of papilla and difficult cannulation was evaluated. Relative risks (RR) and 95% confidence intervals were calculated. RESULTS: 188 patients were included. The mean age was 55 years, 66% female. The most frequent indication was choledocholithiasis with 88.5%. The most frequent type of major duodenal papilla was type 1 (32%), followed by type 3 (27%), type 2 (25%) and type 4 (16%). Type 2, 3, 4 papillae showed a significant relationship with difficult cannulation compared to type 1 (p<0.001, p<0.001 and p=0.008 respectively). The indication other than choledocholithiasis also showed a significant relationship with difficult cannulation (p<0.001). In the adjusted analysis, the RR for difficult cannulation compared to type 1 papilla was: 2.51 (95% CI 1.23-5.94) for type 2 papilla, 3.72 (95% CI 1.79-7.71) for papilla type 3 and 3.41 (95% CI 1.54-7.71) for type 4. Theindication other than choledocholithiasis was also associated with a higher risk of difficult cannulation with a RR of 2.36 (95% CI 1.57-3.56). The fistulotomy type precut was used more frequently in the type 3 papilla (46%), while the use of cannula was more frequent in the type 4 papilla (29.6%). CONCLUSIONS: Papilla types 2, 3 and 4 are associated with a higher risk of difficult cannulation. This should be considered when performing ERCP in order to reduce the risk of complications.

Clostridium perfringens as Foodborne Pathogen in Broiler Production: Pathophysiology and Potential Strategies for Controlling Necrotic Enteritis.

Clostridium perfringens (Cp.) is the cause of human foodborne desease. Meat and poultry products are identified as the main source of infection for humans. Cp. can be found in poultry litter, feces, soil, dust, and healthy birds' intestinal contents. Cp. strains are known to secrete over 20 identified toxins and enzymes that could potentially be the principal virulence factors, capable of degrading mucin, affecting enterocytes, and the small intestine epithelium, involved in necrotic enteritis (NE) pathophysiology, also leading to immunological responses, microbiota modification and anatomical changes. Different environmental and dietary factors can determine the colonization of this microorganism. It has been observed that the incidence of Cp-associated to NE in broilers has increased in countries that have stopped using antibiotic growth promoters. Since the banning of such antibiotic growth promoters, several strategies for Cp. control have been proposed, including dietary modifications, probiotics, prebiotics, synbiotics, phytogenics, organic acids, and vaccines. However, there are aspects of the pathology that still need to be clarified to establish better actions to control and prevention. This paper reviews the current knowledge about Cp. as foodborne pathogen, the pathophysiology of NE, and recent findings on potential strategies for its control.

Immobilizing yeast ß-glucan on zinc-layered hydroxide nanoparticle improves innate immune response in fish leukocytes.

Nanoparticle-based delivery technologies have played a central role in a wide variety of applications, including cell therapy, gene transformation, and cellular delivery of molecular dyes. This work synthesized via ionic exchange a nanoparticle consisting of zinc-layered hydroxychloride coupled with yeast ß-glucan (ZG), whose cellular immune response was evaluated using fish spleen leukocytes. Leukocytes from the marine Pacific red snapper (Lutjanus peru) were stimulated with zinc-layered hydroxychloride (ZHC) coupled with yeast ß-glucan (GLU) and challenged with live Vibrio parahaemolyticus after 24 h. Structural characterization of this yeast glucan by proton nuclear magnetic resonance (NMR) indicated structures containing (1-6)-branched (1-3)-ß-D-glucan. The ZHC and ZG were characterized with X-ray diffraction, infrared spectroscopy, scanning electron microscopy and thermogravimetric analysis. The results of the immunological study showed that ZHC, GLU or ZG were safe for leukocytes because cell viability was higher than 80% compared with DMSO or V. parahaemolyticus exposure. The ZG or GLU treatments enhanced nitric oxide production, superoxide dismutase, catalase and peroxidase activities. Induction of anti- and pro-inflammatory cytokine (IL-1ß, IL-6, IL-8, IL-10, IL-12 and IL-17) genes was more pronounced in ZG or GLU treatments compared to the other groups. Based on the results, ZHC nanoparticles can be used as a delivery carrier of yeast ß-glucan for enhancing immunity in fish and have great potential application in the aquaculture industry.

[Dyspepsia: clinical characteristics, endoscopic and histological findings in patients of the Hospital Nacional Hipolito Unanue, Lima, Peru, during 2010]. / Dispepsia: Características clínicas, hallazgos endoscópicos e histológicos en pacientes atendidos en el Hospital Nacional Hipólito Unanue, Lima, Perú, durante el año 2010.

OBJECTIVE: To identify clinical, endoscopic and histological characteristics and their relationship with Helicobacter pylori (Hp) in patients treated with the diagnosis of dyspepsia in our hospital during 2010. MATERIALS AND METHODS: We conducted a cross sectional and retrospective study in the population attending our hospital during 2010, a sample of 300 patients was studied. We evaluated clinical, histological and endoscopic findings. An instrument of data collection was made. We used the statistical package SPSS 15.0. RESULTS: It was found that the majority were female (63%), while the mean age at diagnosis was 42 years, mostly from SJL district (30%) of these Andean origin (50 %) was the highest percentage. Only 19% showed signs of alarm, low weight characterize this group (14%), the endoscopic findings most commonly found were antral erythema (74.7%), followed by erosions (32.9%) and nodules (22%). Hp infection was found in 93%, mild dysplasia was present in 2.7% and atrophy in only 14.7%. The 98.5% of patients with nodularity on endoscopy had Hp infection. CONCLUSIONS: The most frequent dyspeptic symptoms were epigastric pain followed by abdominal distension, the female gender was present more often, the warning signs were rare, antral erythema was the feature most found in endoscopies. Hp infection was significantly associated with some features such as endoscopic antral nodularity and erythema as well as had relation to the activity of gastritis.

Dispepsia: características clínicas, hallazgos endoscópicos e histológicos en pacientes atendidos en el Hospital Nacional Hipólito Unanue, Lima, Perú, durante el año 2010 / Dyspepsia: clinical characteristics, endoscopic and histological findings in patients of the Hospital Nacional Hipolito Unanue, during 2010

Objetivo: Identificar las características clínicas, endoscópicas e histológicas así como su relación con Helicobacter pylori (Hp) en pacientes atendidos con el diagnóstico de dispepsia en nuestro hospital durante el año 2010. Materiales y métodos: Estudio descriptivo, transversal y retrospectivo en la población que acudía a nuestro hospital, en el año 2010, tamaño muestral de 300 pacientes. Se evaluaron variables clínicas, histológicas y endoscópicas. Se confeccionó un instrumento de recolección de datos. Utilizamos el paquete estadístico SPSS 15.0. Resultados: Del total, en su mayoría fueron mujeres (63%), la edad media de 42 años, procedentes del distrito de SJL (30%), 50% de origen andino. El 19% presentaba signos de alarma, la baja de peso caracterizó a este grupo (14%), en endoscopía, se observó eritema antral (74,7%), erosiones (32,9%) y nodularidad (22%). El 93% presentó infección por Hp, displasia leve en el 2,7% y atrofia en solo 14,7%.El 98,5% de los pacientes que presentó nodularidad tuvo infección por Hp. Conclusiones: Los síntomas dispépticos frecuentes fueron dolor epigástrico seguido de distensión abdominal, el género femenino lo presentó con mayor frecuencia, signos de alarma fueron poco frecuentes, eritema antral fue la característica más encontrada en las endoscopías. La gastritis crónica moderada fue el diagnóstico anátomo-patológico mas frecuente. La infección por Hp tuvo asociación significativa con nodularidad y eritema antral así como también con actividad de la gastritis.

Objective: To identify clinical, endoscopic and histological characteristics and their relationship with Helicobacter pylori (Hp) in patients treated with the diagnosis of dyspepsia in our hospital during 2010. Materials and methods: We conducted a cross sectional and retrospective study in the population attending our hospital during 2010, a sample of 300 patients was studied. We evaluated clinical, histological and endoscopic findings. An instrument of data collection was made. We used the statistical package SPSS 15.0. Results: It was found that the majority were female (63%), while the mean age at diagnosis was 42 years, mostly from SJL district (30%) of these Andean origin (50 %) was the highest percentage. Only 19% showed signs of alarm, low weight characterize this group (14%), the endoscopic findings most commonly found were antral erythema (74.7%), followed by erosions (32.9%) and nodules (22%). Hp infection was found in 93%, mild dysplasia was present in 2.7% and atrophy in only 14.7%. The 98.5% of patients with nodularity on endoscopy had Hp infection. Conclusions: The most frequent dyspeptic symptoms were epigastric pain followed by abdominal distension, the female gender was present more often, the warning signs were rare, antral erythema was the feature most found in endoscopies. Hp infection was significantly associated with some features such as endoscopic antral nodularity and erythema as well as had relation to the activity of gastritis.

Hipoacusia y síndrome de Waardenburg: experiencia de cinco años en el Instituto Nacional de Pediatría / Hypoacusis and Waardenburg syndrome: five years experience at the Instituto Nacional de Pediatría

Se revisaron retrospectivamente los expedientes de pacientes con el síndrome de Waardenburg, entre mayo de 1988 y febero de 1993, se buscó el grado de hipoacusia como característica clínica del síndrome y el tipo del mismo. En la literatura, la hipoacusia varía en frecuencia y grado, nosotros observamos que es la principal manifestación clínica, con una frecuencia significativamente más alta (86.60 por ciento), debiéndose considerar como primordial para el consejo genético en las familias afectadas por el síndrome de Waardenburg

Otitis media en preescolares de nivel socioeconómico bajo atendidos a nivel institucional / Otitis media in preschool children of low income families

En el periodo comprendido entre abril de 1991 y febrero de 1992 se revisaron 2,776 niños en el Servicio de Otorrinolaringología del INP, los cuales comprendían entre cuatro y siete años; de ambos sexos y de nivel socioeconómico bajo pertenecientes a la comunidad de Tláhuac. Al detectar cuadros de otitis media, se les enviaba al servicio de Audiologia y Foniatría para practicarles estudio impedanciométrico y la respectiva audiometría tonal. De los 2,776 niños, 322 presentaron cuadros de otitis media y de estos, 114 acudieron al servicio mencionado. Observamos mayor incidencia en los pacientes masculinos. En la mayoría de los casos, en el estudio audiométrico se encontró audición normal y curvas de timpanograma tipo A