Comparative acute toxicity of gallium(III), antimony(III), indium(III), cadmium(II), and copper(II) on freshwater swamp shrimp (Macrobrachium nipponense)

BACKGROUND: Acute toxicity testing were carried out the freshwater swamp shrimp, Macrobrachium nipponense, as the model animal for the semiconductor applied metals (gallium, antimony, indium, cadmium, and copper) to evaluate if the species is an suitable experimental animal of pollution in aquatic ecosystem. RESULTS: The static renewal test method of acute lethal concentrations determination was used, and water temperature was maintained at 24.0 ± 0.5°C. Data of individual metal obtained from acute toxicity tests were determined using probit analysis method. The median lethal concentration (96-h LC50) of gallium, antimony, indium, cadmium, and copper for M. nipponense were estimated as 2.7742, 1.9626, 6.8938, 0.0539, and 0.0313 mg/L, respectively. CONCLUSIONS: Comparing the toxicity tolerance of M. nipponense with other species which exposed to these metals, it is obviously that the M. nipponense is more sensitive than that of various other aquatic animals.

Captación de galio-67 en nefritis intersticial aguda inaparente / Gallium seizure in interstitial nefritis

En una paciente de 47 años con fiebre persistente y sin signos clínicos o bioquímicos del lugar de origen de la misma, se realizó un estudio centellográfico con citrato de galio-67 para pesquizar posibles focos ocultos de infección. El estudio mostró únicamente captación del radionucleido en ambos riñones en forma difusa e intensa. La biopsia renal mostró AIN. La paciente había recibido previamente ampicilina oral durante 7 días y no presentaba signos clínicos o de laboratorio que hicieran sospechar la lesión renal. Luego de la administración de esteroides la fiebre desapareció y hubo cambios significativos en un nuevo centellograma con galio-67.