Some investors, however, have said that the new tests may not be rigorous enough given the severity of the industry's troubles.
Because the tests may not be completed before the mayor dedicates the new street, Ms. Weinshall plans to put up quaint-looking temporary lights.
A post-mortem examination will be conducted on Monday but the results of toxicology and histology tests may not be released for weeks.
Even the most sensitive tests may not be able to pick up a new H.I.V. infection within a one- to two-month window.
That suggested that conventional bone density tests may not be able to detect all the damage caused by the drug, the researchers said.
In 2005, in a case brought against the cosmetics directive, the French attorney general ruled: "It seems clear that the ban on animal tests applies equally to tests performed for … complying with other legislation, in so far as substances that have been the subject of such tests may not be used as, or in, cosmetic products".
Because the new blood tests are experimental, it is not clear how much virus must be present before West Nile can be detected, so the tests "may not be 100percentt effective in keeping infected blood out of the system," said Dr. Jesse Goodman, director of the Food and Drug Administration's Center of Biologics Evaluation and Research.
Dr. Rita Redberg, editor of Archives of Internal Medicine, a journal that has been publishing a series of papers on overtreatment, said the trend in medicine has been toward running more diagnostic tests and using more invasive procedures, even when tests may not be called for and equally effective, less invasive treatment alternatives may be less risky and less costly.
That is partly because the difficulty of those tests may not be compatible from the perspective of preparation.
Also the nanoparticles (with or without coatings) which were chosen for toxicity tests may not be relevant under environmental conditions.
In some cases, laboratory tests may not be realistic enough to accurately represent actual bioaccumulation patterns in organisms living in natural ecosystems.
