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The aims of this study were to measure the concentrations of nutrients and pollutants in peri-urban wetlands, to analyze the plant morphology of the most representative macrophyte species, and to determine their potential use as biomonitors. Four wetlands in the Middle Paraná River floodplain evidencing contamination or anthropogenic impact were studied. The studied species were Typha domingensis Pers., Eichhornia crassipes (Mart.) Solms., Alternanthera philoxeroides (Mart.) Griseb., and Pistia stratiotes L. Besides, the same plant species from an uncontaminated wetland considered as control were studied. A. philoxeroides showed the highest total phosphorus (TP) concentration in leaves throughout the study, while the other species showed a higher TP concentration in roots than in leaves. Since metal concentration in A. philoxeroides tissues was always higher than in sediment, further studies focused on its phytoremediation capacity should be carried out. T. domingensis exhibited the highest Zn concentrations in roots followed by Pb, and E. crassipes presented the highest values of Pb concentrations in roots. The aerial part height of the plants from peri-urban wetlands was significantly higher than that of the plants from the control, while the root length was significantly lower. The root length of P. stratiotes showed a negative correlation with soluble reactive phosphorus (SRP) concentration in water. All the root anatomical parameters of T. domingensis and E. crassipes showed a positive correlation with nitrate and ammonium concentrations in water. The studied macrophytes evidenced a high tolerance, enabling them to grow and survive in peri-urban wetlands that receive pollution from different sources. The use of aquatic and wetland plants as contaminant bioindicators and bioaccumulators in the Middle Paraná River floodplain is completely feasible.

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En lechones lactantes, las diarreas de origen bacteriano son las mas comunes. Una de ellas es la causada por C. perfringens tipo A, que a pesar de ser parte de la flora intestinal normal, se ha reportado como agente causante de enteritis a partir de la primera semana de vida. El objetivo de este estudio fue detectar la presencia de la enterotoxina de C. perfringens tipo A en lechones lactantes con diarrea, en edades comprendidas entre 1 y 15 días. La investigación se llevó a cabo en 20 granjas porcinas ubicadas en los municipios José Félix Ribas y Revenga del estado Aragua, que poseen una alta densidad de granjas porcinas. Los lechones fueron seleccionados mediante un muestreo al azar simple. Se obtuvo un total de 20 muestras, correspondientes a 20 granjas, las cuales fueron procesadas para la detección de la enterotoxina de C. perfringens tipo A, aplicando la prueba serológica de Aglutinación Pasiva Reversa en Látex (RPLA), resultando 6 granjas positivas (30%), lo que confirma la presencia de la enterotoxina de C. perfringens tipo A, asociado a diarreas en lechones lactantes entre 1 y 15 días de edad en granjas porcinas del estado Aragua.

Detection of Clostridium perfringens Enterotoxine Type A in Samples of Nursing Suckling Pigs with diarrhea from Porcine Farms of Aragua State Abstract Diarrheas of bacterial origin are the most common diarrheas in suckling pigs, especially those caused by C. perfringens Type A, which is a natural inhabitant of their normal intestinal flora. The C. perfringens Type A has been reported as a causative agent of enteritis from the first week of life. The purpose of this study was to detect the presence of C. perfringens enterotoxin Type A in suckling pigs with diarrhea from 1 to 15 days of age. The study was carried out in 20 porcine farms, located at José Félix Ribas and Revenga municipalities of Aragua State, Venezuela, which have a high density of porcine farms. Suckling pigs were selected by means of a random sampling. A total of 20 stool samples from 20 farms was obtained. The detection of C. perfringens enterotoxin Type A was made using the reverse passive latex agglutination test (RPLA). Results of the present study show that 6 farms (30 %) were detected positive, which confirms the presence of C. perfringens enterotoxin Type A, in association with diarrheas in suckling pigs between 1 to 15 days of age in porcine farms of Aragua State.

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INTRODUCCIÓN. Es objetivo de este trabajo describir el tratamiento quirúrgico de las lesiones malignas localizadas en el párpado inferior, de extensión mayor del 25 por ciento y propagación a los cantos mediales y externo. MÉTODOS. Un equipo multidisciplinario del Hospital «Celia Sánchez Manduley¼ (Manzanillo) realizó un estudio descriptivo y prospectivo entre enero de 2001 y diciembre de 2006. Se seleccionaron para el estudio 19 pacientes que cumplieron con los criterios de inclusión, que fueron valorados previamente por el equipo multidisciplinario, y que dieron su consentimiento informado de participar en la investigación. Se describieron variables como edad, sexo, técnica quirúrgica empleada, localización, resultado anatomopatológico, complicaciones y resultado final. A los pacientes se les daría seguimiento durante un mínimo de 5 años. RESULTADOS. Se encontró un ligero predominio del sexo masculino y de edades por encima de los 50 años. La resección del tumor en cuña, seguida de la reconstrucción por técnica de colgajo de mejilla de Mustardé, fue la técnica de elección. El 79 por ciento de los tumores resultó ser del tipo carcinoma basocelular. La necrosis parcial del colgajo y el hematoma fueron las complicaciones más frecuentes. Los pacientes se han mantenido en consulta de seguimiento, sin recidiva ni persistencia tumoral. CONCLUSIONES. El tratamiento quirúrgico por técnica de Mustardé combinada con otras técnicas y realizado por un equipo multidisciplinario es ideal para la cirugía del cáncer del párpado inferior(AU)

INTRODUCTION. The objective of this paper is to describe the surgical treatment of the malignant lesions localized in the lower eyelid with an extension over 25 percent and propagation to the medial and external edges. METHODS. A multidisciplinary team of «Celia Sánchez Manduley¼ Hospital (Manzanillo) conducted a descriptive and prospective study from January 2001 to December 2006. 19 patients that fulfilled the inclusion criterion were selected for the study. They were previously assessed and they gave their informed consent to take part in the study. Variables such as age, sex, surgical technique used, localization, anatomopathological result, complications and final result were described. Patients will be followed up for at least 5 years. RESULTS. A mild predominance of males and of ages over 50 was found. The wedge resection of the tumor followed by Mustardé's cheek flap reconstruction technique was the elective technique. 79 percent of the tumors proved to be basocellular carcinoma. Partial necropsy of the flap and hematoma were the most frequent complications. The patients have been followed up without relapse or tumoral resistance. CONCLUSIONS. The surgical treatment by Mustardé's technique combined with other techniques carried out by a multidisciplinary team is ideal for the surgery of lower eyelid cancer(AU)

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Estudio descriptivo del plantel de enfermería de la Clínica Médica del Hospital Central del IPS. Resalta la diferencia en cuanto a la atención que brindan los profesionales del área teniendo en cuenta factores como nivel de preparación, motivo de elección de la profesión, responsabilidad

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