RESUMO
En el cultivo de camarones L. vannamei se producen afecciones sanitarias y productivas por la presencia de protozoos ciliados epibiontes. En Cuba no existen referencias de cómo varía su manifestación a medida que avanza el cultivo, por lo que se realizó un estudio con el objetivo de determinar la prevalencia general y específica y el grado de severidad de las afecciones por protozoos epibiontes durante el ciclo de engorde del camarón. Para ello, se examinó durante tres ciclos un total de 2880 ejemplares (juveniles y adultos) en la camaronera Tunas de Zaza, provincia de Sancti Spiritus, Cuba. Se expuso la tendencia de los parámetros evaluados, a partir de muestreos semanales y el análisis en fresco y por las características evidentes para cada especie. Los resultados se analizaron mediante modelos de tendencia, partiendo del método de mínimos cuadrados. Las posibles diferencias entre las prevalencias específicas se analizaron mediante las pruebas no paramétricas de Kruskall Wallis y la U de Mann Whitney, utilizando el programa estadístico SPSS, V15. Los resultados muestran que los géneros de protozoos epibiontes observados que mostraron un mayor grado de severidad (GS) en sus lesiones fueron: Epistylis sp., con mayor prevalencia (GS: 1 a 4), seguido por Acineta sp. (GS: 1 a 4); Zoothamnium sp. (GS: 1 a 2) y Ascophrys (GS: 1), con un comportamiento en ascenso a medida que avanzaba el cultivo.
In shrimp (L. vannamei) farming, alterations in health and in productive performance occur. These disorders result from the presence of ciliated epibionts protozoan. In Cuba, there is no data available on how their expression varies as the culture progresses. The purpose of this study was to determine the general prevalence, the specific prevalence, and the degree of severity of the effects caused by epibionts protozoan during the fattening cycle of shrimp. To conduct the study, 2880 shrimp samples (juvenile and adults) were evaluated at the Tunas de Zaza shrimp farm for three cycles. The trend of the evaluated parameters was studied, based on weekly analysis of fresh samples and the obvious characteristics of each species. The results were analyzed using trend models, based on the least squares method. The possible differences among specific prevalence were tested by the Kruskall Wallis and Mann Whitney U nonparametric tests, using the statistical program SPSS V15. The results show that the genera of epibionts protozoa observed which exhibited greater degrees of severity (DS) in their lesions were Epistylis sp., with higher frequency (DS: 1 to 4), followed by Acineta sp. (DS: 1 to 4), Zoothamnium sp. (DS: 1 to 2), and Ascophrys (GS: 1), with a rising behavior as the culture progressed.
RESUMO
Background & objectives: Concentric lamellar calcifications known as psammoma bodies (PB) are found in benign and malignant tumours. Whether or not the inorganic element concentrations in psammomas are similar to serous adenocarcinoma of the ovary and thyroid papillary cancer tissues has not yet been ascertained. We undertook this retrospective study to establish if there is any difference in the concentrations of inorganic ions found in psammomas in serous adenocarcinoma of the ovary, and those found in thyroid papillary cancer tissue. Methods: PB samples from patients with adenocarcinoma of the ovary (n = 10) and with thyroid papillary cancer (n = 10) were analyzed through inductively-coupled plasma spectroscopy (ICP). Results: There were no significant differences in the concentrations of inorganic elements in PB from thyroid papillary cancer than in those PB from ovarian cancer. Interpretation & conclusions: Differences in the concentrations of inorganic elements may be due to the variation in environmental pollution. Our study had limitation of small sample size. Our results suggest that some inorganic elements can participate in the origin of psammoma bodies.