Carrington Laboratories, Inc. (OTC Bulletin Board: CARN) announced that its wholly owned DelSite Biotechnologies, Inc. subsidiary has successfully completed preclinical toxicology studies of its GelVac(TM) nasal powder influenza vaccine under FDA-reviewed protocols. Successful toxicology studies in two animal models using the H5N1 (bird flu) antigen were required in order to proceed with a planned Phase I clinical trial later this year.