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RESUMEN Objetivo. Comparar las concentraciones plasmáticas y tisulares de florfenicol (FFC) y su metabolito florfenicol amina (FFC-a) entre ovinos y conejos, posterior a la administración intramuscular de 20 mg/kg de FFC. Materiales y métodos. Cinco ovinos Suffolk Down y seis conejos Neozelandés fueron utilizados en el estudio. Se colectaron muestras de sangre, previo a la administración de FFC, y a las 0.25, 0.5, 1, 1.5, 2, 3 y 4 horas posteriores al tratamiento. A las 4 horas posteriores al tratamiento, a los animales se les aplicó la eutanasia. Las concentraciones plasmáticas y tisulares de FFC y FFC-a fueron determinadas mediante HPLC. Resultados. Las concentraciones plasmáticas máximas, tasa de absorción, vida media de absorción, tasa de distribución y área bajo la curva de FFC, fueron significativamente mayores en conejos respecto a los ovinos. Asimismo, para FFC-a, las concentraciones plasmáticas máximas y área bajo la curva de concentraciones plasmáticas en el tiempo fueron significativamente mayores en conejos respecto a los ovinos. La proporción de metabolito fue mayor en conejos (12.7±3.07%) en comparación con ovinos (3.99±0.87%) (p<0.05), al igual que las concentraciones tisulares de FFC y FFC-a. Conclusiones. Se observaron diferencias significativas en la farmacocinética y concentraciones tisulares de FFC y FFC-a entre estas dos especies. La mayor concentración de FFC-a en conejos indica un mayor nivel de metabolismo de FFC, respecto a los ovinos. Esto es importante de considerar al momento de establecer dosificaciones y frecuencia de administración de FFC en conejos.

ABSTRACT Objective. The aim of this study was to compare tissue and plasma concentrations of florfenicol (FFC) and its metabolite florfenicol amine (FFC-a) between sheep and rabbits, after intramuscular administration of 20 mg FFC/kg. Materials and methods. Five Suffolk Down sheep and six New Zealand rabbits were used in this study. Blood samples were collected before FFC administration and at 0.25, 0.5, 1, 1.5, 2, 3 and 4 hours after treatment. At 4 hours after treatment, euthanasia was applied to animals. Plasma and tissue concentrations of FFC and FFC-a were determined by HPLC. Results. For FFC, maximum plasma concentrations, absorption rate, absorption half-life, distribution rate, and area under the plasma concentration-time curve were all found to be significantly higher in rabbits than in sheep. Similarly, for FFC-a, significantly higher maximum plasma concentrations and area under the concentration-time curve were observed in rabbits as compared to sheep. The metabolite ratio was higher in rabbits (12.7±3.07%) compared to sheep (3.99±0.87%) (p<0.05), as were the tissue concentrations of FFC and FFC-a. Conclusions. Significant differences in the pharmacokinetics and tissue concentrations of FFC, and its metabolite FFC-a, were observed between these two animal species. The higher concentrations of FFC-a in rabbits indicate a greater level of FFC metabolism as compared to sheep. This should be considered when establishing dosage and frequency of FFC administration for rabbits.

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The birth of a child that requires hospitalization in a Neonatal Intensive Care Unit (NICU) can be very stressful for parents. OBJECTIVE: To determine the stress level of parents of newborns (NB) hospitalized in a level III NICU in Santiago, and its association with clinical and sociodemographic variables. PATIENTS AND METHOD: Descriptive cross-sectional study. 373 admissions were evaluated. The sampling was non-probabilistic and included parents of RN admitted to the UPCN between 7 and 21 days of hospitalization. Only parents which have visited the RN at least three times were included. INSTRUMENTS: i) Questionnaire to obtain data which could not be obtained from the medical record; ii) Parental Stress Scale: Neonatal Intensive Care Unit (PSS:NICU) which measures the perception of parents about stressors from the physical and psychological environment of the UPCN. RESULTS: 100 parents of 59 hospitalized NB participated in the study. The average parental stress was 2.87±0.69. The subscale scores got higher was “Relationship with the baby and parental role”. Complications in pregnancy, prenatal diagnosis or prenatal hospitalization, did not affect the stress level or the presence of prematurity, respiratory diseases, congenital malformations, genopathies or requirement of mechanical ventilation. CONCLUSIONS: Stress levels presented in parents are unrelated to gender and to the studied clinical variables.

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El nacimiento de un hijo que requiere de hospitalización en una Unidad de Paciente Crítico Neonatal (UPCN) puede ser una situación muy estresante para sus padres. Objetivo: Conocer el nivel de estrés de padres de recién nacidos (RN) hospitalizados en una UPCN nivel III y su asociación con variables clínicas y sociodemográficas. Pacientes y Método: Estudio descriptivo y transversal, se recibieron 373 ingresos en la UPCN. El muestreo fue no probabilístico y se incluyó a padres y madres de RN ingresados a la UPCN que tuvieran al momento de la entrevista una hospitalización mayor a 7 días y menor a 21 días y que al menos hayan visitado al RN en tres oportunidades. Las mediciones se realizaron entre los 7 y 21 días de hospitalización. Instrumentos: i) Cuestionario para datos que no pudieron obtenerse de la ficha clínica; ii) Escala de Estrés Parental: Unidad de Cuidados Intensivos Neonatales (PSS:NICU) que mide la percepción de los padres acerca de los estresores provenientes del ambiente físico y psicológico de las UPCN. Resultados: Participaron 100 padres y madres de 59 RN hospitalizados. El estrés parental promedio fue de 2,87 ± 0,69. La subescala que obtuvo puntajes más altos fue “Relación con el bebé y rol parental”. La presencia de complicaciones del embarazo, diagnóstico prenatal u hospitalización prenatal, no afectó el nivel de estrés, como tampoco la prematurez, patología respiratoria, malformaciones congénitas, genopatías o requerimiento de ventilación mecánica. Conclusiones: Los niveles de estrés no presentan diferencias de género y no guardan relación con las variables clínicas estudiadas.

The birth of a child that requires hospitalization in a Neonatal Intensive Care Unit (NICU) can be very stressful for parents. Objective: To determine the stress level of parents of newborns (NB) hospitalized in a level III NICU in Santiago, and its association with clinical and sociodemographic variables. Patients and Method: Descriptive cross-sectional study. 373 admissions were evaluated. The sampling was non-probabilistic and included parents of RN admitted to the UPCN between 7 and 21 days of hospitalization. Only parents which have visited the RN at least three times were included. Instruments: i) Questionnaire to obtain data which could not be obtained from the medical record; ii) Parental Stress Scale: Neonatal Intensive Care Unit (PSS:NICU) which measures the perception of parents about stressors from the physical and psychological environment of the UPCN. Results: 100 parents of 59 hospitalized NB participated in the study. The average parental stress was 2.87±0.69. The subscale scores got higher was “Relationship with the baby and parental role”. Complications in pregnancy, prenatal diagnosis or prenatal hospitalization, did not affect the stress level or the presence of prematurity, respiratory diseases, congenital malformations, genopathies or requirement of mechanical ventilation. Conclusions: Stress levels presented in parents are unrelated to gender and to the studied clinical variables.

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In March 1989 the sub-program for reducing low birth-weight was put into practice. As a response to the application of this subsystem a plan was started at the Northern Maternal Hospital in Santiago de Cuba aimed at training these children's mothers in relation to techniques for caring babies. By means of the sources used some aspects regarding these newborn children were assessed, as well as the achievements of the mothers in the course during their hospitalization. The results showed the effectiveness of this plan, the advantages of its being adopted by nurses and its great social significance.

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Forty females (ages 15-74) with community-acquired, uncomplicated urinary tract infections were studied. Clinical and microbiological efficacy of cefuroxime (250 mg td) and trimethoprim sulfamethoxazole (160/800 mg td) used for 7 days were evaluated. The microorganisms found in the pre-treatment urinary cultures were: Escherichia Coli (85%), Klebsiella Pneumoniae (12.5%), and E. Agglomerans (2.5%). They were all susceptible to cefuroxime, and 42.5% were resistant to trimethoprim sulfamethoxazole (Kirby-Bauer). These findings show that trimethoprim sulfamethoxazole should not be used empirically while waiting for the results of urinary cultures, and that cefuroxime is a good alternative in these cases. Clinical cure was observed in all, and bacteriological cure in 75% of the pts treated with both antimicrobial agents. Relapses and reinfections were detected during follow-up emphasizing the importance of intra and post-treatment urinary cultures.

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