The health of Mexican singer Chavela Vargas remains "unchanged," with no favorable progress to report, though she still shows the "fighting spirit that characterizes her," her doctor, Jose Manuel Nuñez, told Efe on Saturday.

The physician said that his medical report on the artist's health is "without significant change in her general condition," adding that its "evolution is sluggish and quite serious, which means there has not been the positive progress we hoped for."

He said her condition is due to failures of her organism, "kidney failure, pulmonary and cardiac failure."

He said the bodily responses of the Costa Rican-born singer, 93, are minimal, though she remains awake and reacts to stimuli, is in good spirits and tolerates food well.

"I want to stress that she is very fatigued, but even so she maintains the fighting spirit that characterizes her," Núñez said, adding that there had been no significant changes as of Friday, which "means that somehow, as long as she has no complications, we're doing well."

Vargas has been cared for since Sunday by a medical team led by the specialist Jose Manuel Nuñez at the Inovamed Hospital in Cuernavaca, capital of the central Mexican state of Morelos.

Before dawn this morning a group of admirers serenaded Chavela Vargas far enough away to avoid annoying the other patients.

The singer arrived in Mexico on July 26 after almost a month in Spain, where she went to give a recital of songs from the disc she dedicated to the poet Federico Garcia Lorca entitled "La Luna Grande" (Great Moon), and to present her memoirs.

The effort took its toll and on July 12 she was admitted to hospital in the Spanish capital, where she stayed until July 21.

From that day she rested in the Madrid Students Residence, looked after by her nurses, friends and the institution's personnel until she returned to the Mexican town of Tepoztlan, where she has lived in recent years. EFE